Merge branch 'master' into feature_local_container_server

Contributes to issue CURA-4243.

.gitignore

@@ -43,6 +43,8 @@ plugins/ProfileFlattener
 plugins/cura-god-mode-plugin
 plugins/cura-big-flame-graph
 plugins/cura-siemensnx-plugin
+plugins/CuraVariSlicePlugin
+plugins/CuraLiveScriptingPlugin
 
 #Build stuff
 CMakeCache.txt

CMakeLists.txt

@@ -39,7 +39,7 @@ find_package(PythonInterp 3.5.0 REQUIRED)
 install(DIRECTORY resources
         DESTINATION ${CMAKE_INSTALL_DATADIR}/cura)
 install(DIRECTORY plugins
-        DESTINATION lib/cura)
+        DESTINATION lib${LIB_SUFFIX}/cura)
 if(NOT APPLE AND NOT WIN32)
     install(FILES cura_app.py
             DESTINATION ${CMAKE_INSTALL_BINDIR}
@@ -47,16 +47,16 @@ if(NOT APPLE AND NOT WIN32)
             RENAME cura)
     if(EXISTS /etc/debian_version)
         install(DIRECTORY cura
-            DESTINATION lib/python${PYTHON_VERSION_MAJOR}/dist-packages
+            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}/dist-packages
             FILES_MATCHING PATTERN *.py)
         install(FILES ${CMAKE_BINARY_DIR}/CuraVersion.py
-            DESTINATION lib/python${PYTHON_VERSION_MAJOR}/dist-packages/cura)
+            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}/dist-packages/cura)
     else()
         install(DIRECTORY cura
-            DESTINATION lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages
+            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages
             FILES_MATCHING PATTERN *.py)
         install(FILES ${CMAKE_BINARY_DIR}/CuraVersion.py
-            DESTINATION lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/cura)
+            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/cura)
     endif()
     install(FILES ${CMAKE_BINARY_DIR}/cura.desktop
             DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
@@ -72,8 +72,8 @@ else()
             DESTINATION ${CMAKE_INSTALL_BINDIR}
             PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
     install(DIRECTORY cura
-            DESTINATION lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages
+            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages
             FILES_MATCHING PATTERN *.py)
     install(FILES ${CMAKE_BINARY_DIR}/CuraVersion.py
-            DESTINATION lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/cura)
+            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/cura)
 endif()

README.md

@@ -20,6 +20,8 @@ For crashes and similar issues, please attach the following information:
 
 If the Cura user interface still starts, you can also reach this directory from the application menu in Help -> Show settings folder
 
+For additional support, you could also ask in the #cura channel on FreeNode IRC. For help with development, there is also the #cura-dev channel.
+
 Dependencies
 ------------
 

cura/BuildVolume.py

@@ -876,15 +876,6 @@ class BuildVolume(SceneNode):
 
         return result
 
-    ##  Private convenience function to get a setting from the adhesion
-    #   extruder.
-    #
-    #   \param setting_key The key of the setting to get.
-    #   \param property The property to get from the setting.
-    #   \return The property of the specified setting in the adhesion extruder.
-    def _getSettingFromAdhesionExtruder(self, setting_key, property = "value"):
-        return self._getSettingFromExtruder(setting_key, "adhesion_extruder_nr", property)
-
     ##  Private convenience function to get a setting from every extruder.
     #
     #   For single extrusion machines, this gets the setting from the global
@@ -899,44 +890,6 @@ class BuildVolume(SceneNode):
                 all_values[i] = 0
         return all_values
 
-    ##  Private convenience function to get a setting from the support infill
-    #   extruder.
-    #
-    #   \param setting_key The key of the setting to get.
-    #   \param property The property to get from the setting.
-    #   \return The property of the specified setting in the support infill
-    #   extruder.
-    def _getSettingFromSupportInfillExtruder(self, setting_key, property = "value"):
-        return self._getSettingFromExtruder(setting_key, "support_infill_extruder_nr", property)
-
-    ##  Helper function to get a setting from an extruder specified in another
-    #   setting.
-    #
-    #   \param setting_key The key of the setting to get.
-    #   \param extruder_setting_key The key of the setting that specifies from
-    #   which extruder to get the setting, if there are multiple extruders.
-    #   \param property The property to get from the setting.
-    #   \return The property of the specified setting in the specified extruder.
-    def _getSettingFromExtruder(self, setting_key, extruder_setting_key, property = "value"):
-        multi_extrusion = self._global_container_stack.getProperty("machine_extruder_count", "value") > 1
-
-        if not multi_extrusion:
-            stack = self._global_container_stack
-        else:
-            extruder_index = self._global_container_stack.getProperty(extruder_setting_key, "value")
-
-            if str(extruder_index) == "-1":  # If extruder index is -1 use global instead
-                stack = self._global_container_stack
-            else:
-                extruder_stack_id = ExtruderManager.getInstance().extruderIds[str(extruder_index)]
-                stack = ContainerRegistry.getInstance().findContainerStacks(id = extruder_stack_id)[0]
-
-        value = stack.getProperty(setting_key, property)
-        setting_type = stack.getProperty(setting_key, "type")
-        if not value and (setting_type == "int" or setting_type == "float"):
-            return 0
-        return value
-
     ##  Convenience function to calculate the disallowed radius around the edge.
     #
     #   This disallowed radius is to allow for space around the models that is
@@ -945,6 +898,7 @@ class BuildVolume(SceneNode):
     def _getEdgeDisallowedSize(self):
         if not self._global_container_stack:
             return 0
+
         container_stack = self._global_container_stack
         used_extruders = ExtruderManager.getInstance().getUsedExtruderStacks()
 
@@ -953,32 +907,44 @@ class BuildVolume(SceneNode):
             return 0.1  # Return a very small value, so we do draw disallowed area's near the edges.
 
         adhesion_type = container_stack.getProperty("adhesion_type", "value")
+        skirt_brim_line_width = self._global_container_stack.getProperty("skirt_brim_line_width", "value")
+        initial_layer_line_width_factor = self._global_container_stack.getProperty("initial_layer_line_width_factor", "value")
         if adhesion_type == "skirt":
-            skirt_distance = self._getSettingFromAdhesionExtruder("skirt_gap")
+            skirt_distance = self._global_container_stack.getProperty("skirt_gap", "value")
-            skirt_line_count = self._getSettingFromAdhesionExtruder("skirt_line_count")
+            skirt_line_count = self._global_container_stack.getProperty("skirt_line_count", "value")
-            bed_adhesion_size = skirt_distance + (self._getSettingFromAdhesionExtruder("skirt_brim_line_width") * skirt_line_count) * self._getSettingFromAdhesionExtruder("initial_layer_line_width_factor") / 100.0
+
-            if len(used_extruders) > 1:
+            bed_adhesion_size = skirt_distance + (skirt_brim_line_width * skirt_line_count) * initial_layer_line_width_factor / 100.0
+
             for extruder_stack in used_extruders:
                 bed_adhesion_size += extruder_stack.getProperty("skirt_brim_line_width", "value") * extruder_stack.getProperty("initial_layer_line_width_factor", "value") / 100.0
+
             # We don't create an additional line for the extruder we're printing the skirt with.
-                bed_adhesion_size -= self._getSettingFromAdhesionExtruder("skirt_brim_line_width", "value") * self._getSettingFromAdhesionExtruder("initial_layer_line_width_factor", "value") / 100.0
+            bed_adhesion_size -= skirt_brim_line_width * initial_layer_line_width_factor / 100.0
+
         elif adhesion_type == "brim":
-            bed_adhesion_size = self._getSettingFromAdhesionExtruder("skirt_brim_line_width") * self._getSettingFromAdhesionExtruder("brim_line_count") *  self._getSettingFromAdhesionExtruder("initial_layer_line_width_factor") / 100.0
+            brim_line_count = self._global_container_stack.getProperty("brim_line_count", "value")
-            if self._global_container_stack.getProperty("machine_extruder_count", "value") > 1:
+            bed_adhesion_size = skirt_brim_line_width * brim_line_count * initial_layer_line_width_factor / 100.0
+
             for extruder_stack in used_extruders:
                 bed_adhesion_size += extruder_stack.getProperty("skirt_brim_line_width", "value") * extruder_stack.getProperty("initial_layer_line_width_factor", "value") / 100.0
+
             # We don't create an additional line for the extruder we're printing the brim with.
-                bed_adhesion_size -= self._getSettingFromAdhesionExtruder("skirt_brim_line_width", "value") * self._getSettingFromAdhesionExtruder("initial_layer_line_width_factor", "value") / 100.0
+            bed_adhesion_size -= skirt_brim_line_width * initial_layer_line_width_factor / 100.0
+
         elif adhesion_type == "raft":
-            bed_adhesion_size = self._getSettingFromAdhesionExtruder("raft_margin")
+            bed_adhesion_size = self._global_container_stack.getProperty("raft_margin", "value")
+
         elif adhesion_type == "none":
             bed_adhesion_size = 0
+
         else:
             raise Exception("Unknown bed adhesion type. Did you forget to update the build volume calculations for your new bed adhesion type?")
 
         support_expansion = 0
-        if self._getSettingFromSupportInfillExtruder("support_offset") and self._global_container_stack.getProperty("support_enable", "value"):
+        support_enabled = self._global_container_stack.getProperty("support_enable", "value")
-            support_expansion += self._getSettingFromSupportInfillExtruder("support_offset")
+        support_offset = self._global_container_stack.getProperty("support_offset", "value")
+        if support_enabled and support_offset:
+            support_expansion += support_offset
 
         farthest_shield_distance = 0
         if container_stack.getProperty("draft_shield_enabled", "value"):

cura/CameraAnimation.py

@@ -12,8 +12,8 @@ class CameraAnimation(QVariantAnimation):
     def __init__(self, parent = None):
         super().__init__(parent)
         self._camera_tool = None
-        self.setDuration(500)
+        self.setDuration(300)
-        self.setEasingCurve(QEasingCurve.InOutQuad)
+        self.setEasingCurve(QEasingCurve.OutQuad)
 
     def setCameraTool(self, camera_tool):
         self._camera_tool = camera_tool

cura/ConvexHullDecorator.py

@@ -302,24 +302,23 @@ class ConvexHullDecorator(SceneNodeDecorator):
             self._onChanged()
 
     ##   Private convenience function to get a setting from the correct extruder (as defined by limit_to_extruder property).
-    def _getSettingProperty(self, setting_key, property = "value"):
+    def _getSettingProperty(self, setting_key, prop = "value"):
         per_mesh_stack = self._node.callDecoration("getStack")
         if per_mesh_stack:
-            return per_mesh_stack.getProperty(setting_key, property)
+            return per_mesh_stack.getProperty(setting_key, prop)
-
-        multi_extrusion = self._global_stack.getProperty("machine_extruder_count", "value") > 1
-        if not multi_extrusion:
-            return self._global_stack.getProperty(setting_key, property)
 
         extruder_index = self._global_stack.getProperty(setting_key, "limit_to_extruder")
-        if extruder_index == "-1": #No limit_to_extruder.
+        if extruder_index == "-1":
+            # No limit_to_extruder
             extruder_stack_id = self._node.callDecoration("getActiveExtruder")
-            if not extruder_stack_id: #Decoration doesn't exist.
+            if not extruder_stack_id:
+                # Decoration doesn't exist
                 extruder_stack_id = ExtruderManager.getInstance().extruderIds["0"]
             extruder_stack = ContainerRegistry.getInstance().findContainerStacks(id = extruder_stack_id)[0]
-            return extruder_stack.getProperty(setting_key, property)
+            return extruder_stack.getProperty(setting_key, prop)
-        else: #Limit_to_extruder is set. The global stack handles this then.
+        else:
-            return self._global_stack.getProperty(setting_key, property)
+            # Limit_to_extruder is set. The global stack handles this then
+            return self._global_stack.getProperty(setting_key, prop)
 
     ## Returns true if node is a descendant or the same as the root node.
     def __isDescendant(self, root, node):

cura/CrashHandler.py

@@ -53,6 +53,7 @@ class CrashHandler:
         self.exception_type = exception_type
         self.value = value
         self.traceback = tb
+        self.dialog = QDialog()
 
         # While we create the GUI, the information will be stored for sending afterwards
         self.data = dict()
@@ -74,7 +75,6 @@ class CrashHandler:
 
     ##  Creates a modal dialog.
     def _createDialog(self):
-        self.dialog = QDialog()
         self.dialog.setMinimumWidth(640)
         self.dialog.setMinimumHeight(640)
         self.dialog.setWindowTitle(catalog.i18nc("@title:window", "Crash Report"))
@@ -108,11 +108,11 @@ class CrashHandler:
         except:
             self.cura_version = catalog.i18nc("@label unknown version of Cura", "Unknown")
 
-        crash_info = catalog.i18nc("@label Cura version", "<b>Cura version:</b> {version}<br/>").format(version = self.cura_version)
+        crash_info = "<b>" + catalog.i18nc("@label Cura version number", "Cura version") + ":</b> " + str(self.cura_version) + "<br/>"
-        crash_info += catalog.i18nc("@label Platform", "<b>Platform:</b> {platform}<br/>").format(platform = platform.platform())
+        crash_info += "<b>" + catalog.i18nc("@label Type of platform", "Platform") + ":</b> " + str(platform.platform()) + "<br/>"
-        crash_info += catalog.i18nc("@label Qt version", "<b>Qt version:</b> {qt}<br/>").format(qt = QT_VERSION_STR)
+        crash_info += "<b>" + catalog.i18nc("@label", "Qt version") + ":</b> " + str(QT_VERSION_STR) + "<br/>"
-        crash_info += catalog.i18nc("@label PyQt version", "<b>PyQt version:</b> {pyqt}<br/>").format(pyqt = PYQT_VERSION_STR)
+        crash_info += "<b>" + catalog.i18nc("@label", "PyQt version") + ":</b> " + str(PYQT_VERSION_STR) + "<br/>"
-        crash_info += catalog.i18nc("@label OpenGL", "<b>OpenGL:</b> {opengl}<br/>").format(opengl = self._getOpenGLInfo())
+        crash_info += "<b>" + catalog.i18nc("@label OpenGL version", "OpenGL") + ":</b> " + str(self._getOpenGLInfo()) + "<br/>"
         label.setText(crash_info)
 
         layout.addWidget(label)
@@ -126,13 +126,18 @@ class CrashHandler:
         return group
 
     def _getOpenGLInfo(self):
+        opengl_instance = OpenGL.getInstance()
+        if not opengl_instance:
+            self.data["opengl"] = {"version": "n/a", "vendor": "n/a", "type": "n/a"}
+            return catalog.i18nc("@label", "not yet initialised<br/>")
+
         info = "<ul>"
-        info += catalog.i18nc("@label OpenGL version", "<li>OpenGL Version: {version}</li>").format(version = OpenGL.getInstance().getOpenGLVersion())
+        info += catalog.i18nc("@label OpenGL version", "<li>OpenGL Version: {version}</li>").format(version = opengl_instance.getOpenGLVersion())
-        info += catalog.i18nc("@label OpenGL vendor", "<li>OpenGL Vendor: {vendor}</li>").format(vendor = OpenGL.getInstance().getGPUVendorName())
+        info += catalog.i18nc("@label OpenGL vendor", "<li>OpenGL Vendor: {vendor}</li>").format(vendor = opengl_instance.getGPUVendorName())
-        info += catalog.i18nc("@label OpenGL renderer", "<li>OpenGL Renderer: {renderer}</li>").format(renderer = OpenGL.getInstance().getGPUType())
+        info += catalog.i18nc("@label OpenGL renderer", "<li>OpenGL Renderer: {renderer}</li>").format(renderer = opengl_instance.getGPUType())
         info += "</ul>"
 
-        self.data["opengl"] = {"version": OpenGL.getInstance().getOpenGLVersion(), "vendor": OpenGL.getInstance().getGPUVendorName(), "type": OpenGL.getInstance().getGPUType()}
+        self.data["opengl"] = {"version": opengl_instance.getOpenGLVersion(), "vendor": opengl_instance.getGPUVendorName(), "type": opengl_instance.getGPUType()}
 
         return info
 
@@ -280,5 +285,7 @@ class CrashHandler:
         Application.getInstance().callLater(self._show)
 
     def _show(self):
+        # When the exception is not in the fatal_exception_types list, the dialog is not created, so we don't need to show it
+        if self.dialog:
             self.dialog.exec_()
             os._exit(1)

cura/CuraApplication.py

@@ -105,7 +105,7 @@ class CuraApplication(QtApplication):
     # SettingVersion represents the set of settings available in the machine/extruder definitions.
     # You need to make sure that this version number needs to be increased if there is any non-backwards-compatible
     # changes of the settings.
-    SettingVersion = 3
+    SettingVersion = 4
 
     class ResourceTypes:
         QmlFiles = Resources.UserType + 1
@@ -126,8 +126,6 @@ class CuraApplication(QtApplication):
     #        Cura will always show the Add Machine Dialog upon start.
     stacksValidationFinished = pyqtSignal()  # Emitted whenever a validation is finished
 
-    projectFileLoaded = pyqtSignal(str)  # Emitted whenever a project file is loaded
-
     def __init__(self):
         # this list of dir names will be used by UM to detect an old cura directory
         for dir_name in ["extruders", "machine_instances", "materials", "plugins", "quality", "user", "variants"]:
@@ -200,6 +198,7 @@ class CuraApplication(QtApplication):
 
         self._machine_action_manager = MachineActionManager.MachineActionManager()
         self._machine_manager = None    # This is initialized on demand.
+        self._extruder_manager = None
         self._material_manager = None
         self._setting_inheritance_manager = None
         self._simple_mode_settings_manager = None
@@ -215,8 +214,9 @@ class CuraApplication(QtApplication):
 
         self.setRequiredPlugins([
             "CuraEngineBackend",
+            "UserAgreement",
             "SolidView",
-            "LayerView",
+            "SimulationView",
             "STLReader",
             "SelectionTool",
             "CameraTool",
@@ -259,20 +259,25 @@ class CuraApplication(QtApplication):
         # Since they are empty, they should never be serialized and instead just programmatically created.
         # We need them to simplify the switching between materials.
         empty_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+
         empty_variant_container = copy.deepcopy(empty_container)
         empty_variant_container.setMetaDataEntry("id", "empty_variant")
         empty_variant_container.addMetaDataEntry("type", "variant")
         ContainerRegistry.getInstance().addContainer(empty_variant_container)
+
         empty_material_container = copy.deepcopy(empty_container)
         empty_material_container.setMetaDataEntry("id", "empty_material")
         empty_material_container.addMetaDataEntry("type", "material")
         ContainerRegistry.getInstance().addContainer(empty_material_container)
+
         empty_quality_container = copy.deepcopy(empty_container)
         empty_quality_container.setMetaDataEntry("id", "empty_quality")
         empty_quality_container.setName("Not Supported")
-        empty_quality_container.addMetaDataEntry("quality_type", "normal")
+        empty_quality_container.addMetaDataEntry("quality_type", "not_supported")
         empty_quality_container.addMetaDataEntry("type", "quality")
+        empty_quality_container.addMetaDataEntry("supported", False)
         ContainerRegistry.getInstance().addContainer(empty_quality_container)
+
         empty_quality_changes_container = copy.deepcopy(empty_container)
         empty_quality_changes_container.setMetaDataEntry("id", "empty_quality_changes")
         empty_quality_changes_container.addMetaDataEntry("type", "quality_changes")
@@ -303,6 +308,8 @@ class CuraApplication(QtApplication):
 
         preferences.addPreference("view/invert_zoom", False)
 
+        self._need_to_show_user_agreement = not Preferences.getInstance().getValue("general/accepted_user_agreement")
+
         for key in [
             "dialog_load_path",  # dialog_save_path is in LocalFileOutputDevicePlugin
             "dialog_profile_path",
@@ -375,6 +382,14 @@ class CuraApplication(QtApplication):
     def _onEngineCreated(self):
         self._engine.addImageProvider("camera", CameraImageProvider.CameraImageProvider())
 
+    @pyqtProperty(bool)
+    def needToShowUserAgreement(self):
+        return self._need_to_show_user_agreement
+
+
+    def setNeedToShowUserAgreement(self, set_value = True):
+        self._need_to_show_user_agreement = set_value
+
     ## The "Quit" button click event handler.
     @pyqtSlot()
     def closeApplication(self):
@@ -393,6 +408,7 @@ class CuraApplication(QtApplication):
     showDiscardOrKeepProfileChanges = pyqtSignal()
 
     def discardOrKeepProfileChanges(self):
+        has_user_interaction = False
         choice = Preferences.getInstance().getValue("cura/choice_on_profile_override")
         if choice == "always_discard":
             # don't show dialog and DISCARD the profile
@@ -403,18 +419,36 @@ class CuraApplication(QtApplication):
         else:
             # ALWAYS ask whether to keep or discard the profile
             self.showDiscardOrKeepProfileChanges.emit()
+            has_user_interaction = True
+        return has_user_interaction
 
-    #sidebarSimpleDiscardOrKeepProfileChanges = pyqtSignal()
+    onDiscardOrKeepProfileChangesClosed = pyqtSignal()  # Used to notify other managers that the dialog was closed
 
     @pyqtSlot(str)
     def discardOrKeepProfileChangesClosed(self, option):
         if option == "discard":
             global_stack = self.getGlobalContainerStack()
-            for extruder in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
+            for extruder in self._extruder_manager.getMachineExtruders(global_stack.getId()):
                 extruder.getTop().clear()
-
             global_stack.getTop().clear()
 
+        # if the user decided to keep settings then the user settings should be re-calculated and validated for errors
+        # before slicing. To ensure that slicer uses right settings values
+        elif option == "keep":
+            global_stack = self.getGlobalContainerStack()
+            for extruder in self._extruder_manager.getMachineExtruders(global_stack.getId()):
+                user_extruder_container = extruder.getTop()
+                if user_extruder_container:
+                    user_extruder_container.update()
+
+            user_global_container = global_stack.getTop()
+            if user_global_container:
+                user_global_container.update()
+
+        # notify listeners that quality has changed (after user selected discard or keep)
+        self.onDiscardOrKeepProfileChangesClosed.emit()
+        self.getMachineManager().activeQualityChanged.emit()
+
     @pyqtSlot(int)
     def messageBoxClosed(self, button):
         if self._message_box_callback:
@@ -528,6 +562,7 @@ class CuraApplication(QtApplication):
         super().addCommandLineOptions(parser)
         parser.add_argument("file", nargs="*", help="Files to load after starting the application.")
         parser.add_argument("--single-instance", action="store_true", default=False)
+        parser.add_argument("--headless", action = "store_true", default=False)
 
     # Set up a local socket server which listener which coordinates single instances Curas and accepts commands.
     def _setUpSingleInstanceServer(self):
@@ -664,25 +699,25 @@ class CuraApplication(QtApplication):
 
         self.showSplashMessage(self._i18n_catalog.i18nc("@info:progress", "Loading interface..."))
 
-        # Initialise extruder so as to listen to global container stack changes before the first global container stack is set.
+        qmlRegisterSingletonType(ExtruderManager, "Cura", 1, 0, "ExtruderManager", self.getExtruderManager)
-        ExtruderManager.getInstance()
         qmlRegisterSingletonType(MachineManager, "Cura", 1, 0, "MachineManager", self.getMachineManager)
         qmlRegisterSingletonType(MaterialManager, "Cura", 1, 0, "MaterialManager", self.getMaterialManager)
-        qmlRegisterSingletonType(SettingInheritanceManager, "Cura", 1, 0, "SettingInheritanceManager",
+        qmlRegisterSingletonType(SettingInheritanceManager, "Cura", 1, 0, "SettingInheritanceManager", self.getSettingInheritanceManager)
-                                 self.getSettingInheritanceManager)
+        qmlRegisterSingletonType(SimpleModeSettingsManager, "Cura", 1, 2, "SimpleModeSettingsManager", self.getSimpleModeSettingsManager)
-        qmlRegisterSingletonType(SimpleModeSettingsManager, "Cura", 1, 2, "SimpleModeSettingsManager",
-                                 self.getSimpleModeSettingsManager)
-
         qmlRegisterSingletonType(MachineActionManager.MachineActionManager, "Cura", 1, 0, "MachineActionManager", self.getMachineActionManager)
+
         self.setMainQml(Resources.getPath(self.ResourceTypes.QmlFiles, "Cura.qml"))
         self._qml_import_paths.append(Resources.getPath(self.ResourceTypes.QmlFiles))
+
+        run_headless = self.getCommandLineOption("headless", False)
+        if not run_headless:
             self.initializeEngine()
 
-        if self._engine.rootObjects:
+        if run_headless or self._engine.rootObjects:
             self.closeSplash()
 
-            for file in self.getCommandLineOption("file", []):
+            for file_name in self.getCommandLineOption("file", []):
-                self._openFile(file)
+                self._openFile(file_name)
             for file_name in self._open_file_queue: #Open all the files that were queued up while plug-ins were loading.
                 self._openFile(file_name)
 
@@ -695,6 +730,11 @@ class CuraApplication(QtApplication):
             self._machine_manager = MachineManager.createMachineManager()
         return self._machine_manager
 
+    def getExtruderManager(self, *args):
+        if self._extruder_manager is None:
+            self._extruder_manager = ExtruderManager.createExtruderManager()
+        return self._extruder_manager
+
     def getMaterialManager(self, *args):
         if self._material_manager is None:
             self._material_manager = MaterialManager.createMaterialManager()
@@ -745,7 +785,6 @@ class CuraApplication(QtApplication):
         qmlRegisterUncreatableType(CuraApplication, "Cura", 1, 0, "ResourceTypes", "Just an Enum type")
 
         qmlRegisterType(ExtrudersModel, "Cura", 1, 0, "ExtrudersModel")
-
         qmlRegisterType(ContainerSettingsModel, "Cura", 1, 0, "ContainerSettingsModel")
         qmlRegisterSingletonType(ProfilesModel, "Cura", 1, 0, "ProfilesModel", ProfilesModel.createProfilesModel)
         qmlRegisterType(MaterialsModel, "Cura", 1, 0, "MaterialsModel")
@@ -755,15 +794,12 @@ class CuraApplication(QtApplication):
         qmlRegisterType(QualitySettingsModel, "Cura", 1, 0, "QualitySettingsModel")
         qmlRegisterType(MachineNameValidator, "Cura", 1, 0, "MachineNameValidator")
         qmlRegisterType(UserChangesModel, "Cura", 1, 1, "UserChangesModel")
-
         qmlRegisterSingletonType(ContainerManager, "Cura", 1, 0, "ContainerManager", ContainerManager.createContainerManager)
 
         # As of Qt5.7, it is necessary to get rid of any ".." in the path for the singleton to work.
         actions_url = QUrl.fromLocalFile(os.path.abspath(Resources.getPath(CuraApplication.ResourceTypes.QmlFiles, "Actions.qml")))
         qmlRegisterSingletonType(actions_url, "Cura", 1, 0, "Actions")
 
-        engine.rootContext().setContextProperty("ExtruderManager", ExtruderManager.getInstance())
-
         for path in Resources.getAllResourcesOfType(CuraApplication.ResourceTypes.QmlFiles):
             type_name = os.path.splitext(os.path.basename(path))[0]
             if type_name in ("Cura", "Actions"):
@@ -1229,6 +1265,9 @@ class CuraApplication(QtApplication):
                 # see GroupDecorator._onChildrenChanged
 
     def _createSplashScreen(self):
+        run_headless = self.getCommandLineOption("headless", False)
+        if run_headless:
+            return None
         return CuraSplashScreen.CuraSplashScreen()
 
     def _onActiveMachineChanged(self):
@@ -1342,7 +1381,7 @@ class CuraApplication(QtApplication):
 
             extension = os.path.splitext(filename)[1]
             if extension.lower() in self._non_sliceable_extensions:
-                self.getController().setActiveView("LayerView")
+                self.getController().setActiveView("SimulationView")
                 view = self.getController().getActiveView()
                 view.resetLayerData()
                 view.setLayer(9999999)

cura/Layer.py

@@ -47,12 +47,12 @@ class Layer:
 
         return result
 
-    def build(self, vertex_offset, index_offset, vertices, colors, line_dimensions, extruders, line_types, indices):
+    def build(self, vertex_offset, index_offset, vertices, colors, line_dimensions, feedrates, extruders, line_types, indices):
         result_vertex_offset = vertex_offset
         result_index_offset = index_offset
         self._element_count = 0
         for polygon in self._polygons:
-            polygon.build(result_vertex_offset, result_index_offset, vertices, colors, line_dimensions, extruders, line_types, indices)
+            polygon.build(result_vertex_offset, result_index_offset, vertices, colors, line_dimensions, feedrates, extruders, line_types, indices)
             result_vertex_offset += polygon.lineMeshVertexCount()
             result_index_offset += polygon.lineMeshElementCount()
             self._element_count += polygon.elementCount

cura/LayerDataBuilder.py

@@ -20,11 +20,11 @@ class LayerDataBuilder(MeshBuilder):
         if layer not in self._layers:
             self._layers[layer] = Layer(layer)
 
-    def addPolygon(self, layer, polygon_type, data, line_width):
+    def addPolygon(self, layer, polygon_type, data, line_width, line_thickness, line_feedrate):
         if layer not in self._layers:
             self.addLayer(layer)
 
-        p = LayerPolygon(self, polygon_type, data, line_width)
+        p = LayerPolygon(self, polygon_type, data, line_width, line_thickness, line_feedrate)
         self._layers[layer].polygons.append(p)
 
     def getLayer(self, layer):
@@ -64,13 +64,14 @@ class LayerDataBuilder(MeshBuilder):
         line_dimensions = numpy.empty((vertex_count, 2), numpy.float32)
         colors = numpy.empty((vertex_count, 4), numpy.float32)
         indices = numpy.empty((index_count, 2), numpy.int32)
+        feedrates = numpy.empty((vertex_count), numpy.float32)
         extruders = numpy.empty((vertex_count), numpy.float32)
         line_types = numpy.empty((vertex_count), numpy.float32)
 
         vertex_offset = 0
         index_offset = 0
         for layer, data in sorted(self._layers.items()):
-            ( vertex_offset, index_offset ) = data.build( vertex_offset, index_offset, vertices, colors, line_dimensions, extruders, line_types, indices)
+            ( vertex_offset, index_offset ) = data.build( vertex_offset, index_offset, vertices, colors, line_dimensions, feedrates, extruders, line_types, indices)
             self._element_counts[layer] = data.elementCount
 
         self.addVertices(vertices)
@@ -107,6 +108,11 @@ class LayerDataBuilder(MeshBuilder):
                 "value": line_types,
                 "opengl_name": "a_line_type",
                 "opengl_type": "float"
+                },
+            "feedrates": {
+                "value": feedrates,
+                "opengl_name": "a_feedrate",
+                "opengl_type": "float"
                 }
             }
 

cura/LayerPolygon.py

@@ -28,7 +28,8 @@ class LayerPolygon:
     #   \param data new_points
     #   \param line_widths array with line widths
     #   \param line_thicknesses: array with type as index and thickness as value
-    def __init__(self, extruder, line_types, data, line_widths, line_thicknesses):
+    #   \param line_feedrates array with line feedrates
+    def __init__(self, extruder, line_types, data, line_widths, line_thicknesses, line_feedrates):
         self._extruder = extruder
         self._types = line_types
         for i in range(len(self._types)):
@@ -37,6 +38,7 @@ class LayerPolygon:
         self._data = data
         self._line_widths = line_widths
         self._line_thicknesses = line_thicknesses
+        self._line_feedrates = line_feedrates
 
         self._vertex_begin = 0
         self._vertex_end = 0
@@ -84,10 +86,11 @@ class LayerPolygon:
     #   \param vertices : vertex numpy array to be filled
     #   \param colors : vertex numpy array to be filled
     #   \param line_dimensions : vertex numpy array to be filled
+    #   \param feedrates : vertex numpy array to be filled
     #   \param extruders : vertex numpy array to be filled
     #   \param line_types : vertex numpy array to be filled
     #   \param indices : index numpy array to be filled
-    def build(self, vertex_offset, index_offset, vertices, colors, line_dimensions, extruders, line_types, indices):
+    def build(self, vertex_offset, index_offset, vertices, colors, line_dimensions, feedrates, extruders, line_types, indices):
         if self._build_cache_line_mesh_mask is None or self._build_cache_needed_points is None:
             self.buildCache()
             
@@ -109,10 +112,13 @@ class LayerPolygon:
         # Create an array with colors for each vertex and remove the color data for the points that has been thrown away. 
         colors[self._vertex_begin:self._vertex_end, :] = numpy.tile(self._colors, (1, 2)).reshape((-1, 4))[needed_points_list.ravel()]
 
-        # Create an array with line widths for each vertex.
+        # Create an array with line widths and thicknesses for each vertex.
         line_dimensions[self._vertex_begin:self._vertex_end, 0] = numpy.tile(self._line_widths, (1, 2)).reshape((-1, 1))[needed_points_list.ravel()][:, 0]
         line_dimensions[self._vertex_begin:self._vertex_end, 1] = numpy.tile(self._line_thicknesses, (1, 2)).reshape((-1, 1))[needed_points_list.ravel()][:, 0]
 
+        # Create an array with feedrates for each line
+        feedrates[self._vertex_begin:self._vertex_end] = numpy.tile(self._line_feedrates, (1, 2)).reshape((-1, 1))[needed_points_list.ravel()][:, 0]
+
         extruders[self._vertex_begin:self._vertex_end] = self._extruder
 
         # Convert type per vertex to type per line
@@ -167,6 +173,14 @@ class LayerPolygon:
     def lineWidths(self):
         return self._line_widths
 
+    @property
+    def lineThicknesses(self):
+        return self._line_thicknesses
+
+    @property
+    def lineFeedrates(self):
+        return self._line_feedrates
+    
     @property
     def jumpMask(self):
         return self._jump_mask

cura/MachineAction.py

@@ -73,14 +73,8 @@ class MachineAction(QObject, PluginObject):
 
     ##  Protected helper to create a view object based on provided QML.
     def _createViewFromQML(self):
-        path = QUrl.fromLocalFile(os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), self._qml_url))
+        path = os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), self._qml_url)
-        self._component = QQmlComponent(Application.getInstance()._engine, path)
+        self._view = Application.getInstance().createQmlComponent(path, {"manager": self})
-        self._context = QQmlContext(Application.getInstance()._engine.rootContext())
-        self._context.setContextProperty("manager", self)
-        self._view = self._component.create(self._context)
-        if self._view is None:
-            Logger.log("c", "QQmlComponent status %s", self._component.status())
-            Logger.log("c", "QQmlComponent error string %s", self._component.errorString())
 
     @pyqtProperty(QObject, constant = True)
     def displayItem(self):

cura/PreviewPass.py

@@ -0,0 +1,57 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Uranium is released under the terms of the LGPLv3 or higher.
+
+from UM.Application import Application
+from UM.Resources import Resources
+
+from UM.View.RenderPass import RenderPass
+from UM.View.GL.OpenGL import OpenGL
+from UM.View.RenderBatch import RenderBatch
+
+
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
+
+from typing import Optional
+
+MYPY = False
+if MYPY:
+    from UM.Scene.Camera import Camera
+
+##  A render pass subclass that renders slicable objects with default parameters.
+#   It uses the active camera by default, but it can be overridden to use a different camera.
+#
+#   This is useful to get a preview image of a scene taken from a different location as the active camera.
+class PreviewPass(RenderPass):
+    def __init__(self, width: int, height: int):
+        super().__init__("preview", width, height, 0)
+
+        self._camera = None  # type: Optional[Camera]
+
+        self._renderer = Application.getInstance().getRenderer()
+
+        self._shader = None
+        self._scene = Application.getInstance().getController().getScene()
+
+    #   Set the camera to be used by this render pass
+    #   if it's None, the active camera is used
+    def setCamera(self, camera: Optional["Camera"]):
+        self._camera = camera
+
+    def render(self) -> None:
+        if not self._shader:
+            self._shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "object.shader"))
+
+        # Create a new batch to be rendered
+        batch = RenderBatch(self._shader)
+
+        # Fill up the batch with objects that can be sliced. `
+        for node in DepthFirstIterator(self._scene.getRoot()):
+            if node.callDecoration("isSliceable") and node.getMeshData() and node.isVisible():
+                batch.addItem(node.getWorldTransformation(), node.getMeshData())
+
+        self.bind()
+        if self._camera is None:
+            batch.render(Application.getInstance().getController().getScene().getActiveCamera())
+        else:
+            batch.render(self._camera)
+        self.release()

cura/PrintInformation.py

@@ -56,6 +56,7 @@ class PrintInformation(QObject):
         self._material_lengths = []
         self._material_weights = []
         self._material_costs = []
+        self._material_names = []
 
         self._pre_sliced = False
 
@@ -66,11 +67,10 @@ class PrintInformation(QObject):
         self._base_name = ""
         self._abbr_machine = ""
         self._job_name = ""
-        self._project_name = ""
 
         Application.getInstance().globalContainerStackChanged.connect(self._updateJobName)
         Application.getInstance().fileLoaded.connect(self.setBaseName)
-        Application.getInstance().projectFileLoaded.connect(self.setProjectName)
+        Application.getInstance().workspaceLoaded.connect(self.setProjectName)
         Preferences.getInstance().preferenceChanged.connect(self._onPreferencesChanged)
 
         self._active_material_container = None
@@ -139,6 +139,12 @@ class PrintInformation(QObject):
     def materialCosts(self):
         return self._material_costs
 
+    materialNamesChanged = pyqtSignal()
+
+    @pyqtProperty("QVariantList", notify = materialNamesChanged)
+    def materialNames(self):
+        return self._material_names
+
     def _onPrintDurationMessage(self, print_time, material_amounts):
 
         self._updateTotalPrintTimePerFeature(print_time)
@@ -170,6 +176,7 @@ class PrintInformation(QObject):
         self._material_lengths = []
         self._material_weights = []
         self._material_costs = []
+        self._material_names = []
 
         material_preference_values = json.loads(Preferences.getInstance().getValue("cura/material_settings"))
 
@@ -188,8 +195,10 @@ class PrintInformation(QObject):
 
             weight = float(amount) * float(density) / 1000
             cost = 0
+            material_name = catalog.i18nc("@label unknown material", "Unknown")
             if material:
                 material_guid = material.getMetaDataEntry("GUID")
+                material_name = material.getName()
                 if material_guid in material_preference_values:
                     material_values = material_preference_values[material_guid]
 
@@ -208,10 +217,12 @@ class PrintInformation(QObject):
             self._material_weights.append(weight)
             self._material_lengths.append(length)
             self._material_costs.append(cost)
+            self._material_names.append(material_name)
 
         self.materialLengthsChanged.emit()
         self.materialWeightsChanged.emit()
         self.materialCostsChanged.emit()
+        self.materialNamesChanged.emit()
 
     def _onPreferencesChanged(self, preference):
         if preference != "cura/material_settings":
@@ -241,11 +252,6 @@ class PrintInformation(QObject):
         self._job_name = name
         self.jobNameChanged.emit()
 
-    @pyqtSlot(str)
-    def setProjectName(self, name):
-        self._project_name = name
-        self.setJobName(name)
-
     jobNameChanged = pyqtSignal()
 
     @pyqtProperty(str, notify = jobNameChanged)
@@ -253,11 +259,6 @@ class PrintInformation(QObject):
         return self._job_name
 
     def _updateJobName(self):
-        # if the project name is set, we use the project name as the job name, so the job name should not get updated
-        # if a model file is loaded after that.
-        if self._project_name != "":
-            return
-
         if self._base_name == "":
             self._job_name = ""
             self.jobNameChanged.emit()
@@ -283,7 +284,11 @@ class PrintInformation(QObject):
         return self._base_name
 
     @pyqtSlot(str)
-    def setBaseName(self, base_name):
+    def setProjectName(self, name):
+        self.setBaseName(name, is_project_file = True)
+
+    @pyqtSlot(str)
+    def setBaseName(self, base_name, is_project_file = False):
         # Ensure that we don't use entire path but only filename
         name = os.path.basename(base_name)
 
@@ -291,11 +296,17 @@ class PrintInformation(QObject):
         # extension. This cuts the extension off if necessary.
         name = os.path.splitext(name)[0]
 
+        # if this is a profile file, always update the job name
         # name is "" when I first had some meshes and afterwards I deleted them so the naming should start again
-        if name == "" or (self._base_name == "" and self._base_name != name):
+        is_empty = name == ""
+        if is_project_file or (is_empty or (self._base_name == "" and self._base_name != name)):
+            # remove ".curaproject" suffix from (imported) the file name
+            if name.endswith(".curaproject"):
+                name = name[:name.rfind(".curaproject")]
             self._base_name = name
             self._updateJobName()
 
+
     ##  Created an acronymn-like abbreviated machine name from the currently active machine name
     #   Called each time the global stack is switched
     def _setAbbreviatedMachineName(self):
@@ -313,7 +324,12 @@ class PrintInformation(QObject):
             elif word.isdigit():
                 abbr_machine += word
             else:
-                abbr_machine += self._stripAccents(word.strip("()[]{}#").upper())[0]
+                stripped_word = self._stripAccents(word.strip("()[]{}#").upper())
+                # - use only the first character if the word is too long (> 3 characters)
+                # - use the whole word if it's not too long (<= 3 characters)
+                if len(stripped_word) > 3:
+                    stripped_word = stripped_word[0]
+                abbr_machine += stripped_word
 
         self._abbr_machine = abbr_machine
 
@@ -339,4 +355,3 @@ class PrintInformation(QObject):
 
         temp_material_amounts = [0]
         self._onPrintDurationMessage(temp_message, temp_material_amounts)
-

cura/PrinterOutputDevice.py

@@ -74,6 +74,7 @@ class PrinterOutputDevice(QObject, OutputDevice):
         self._can_pause = True
         self._can_abort = True
         self._can_pre_heat_bed = True
+        self._can_control_manually = True
 
     def requestWrite(self, nodes, file_name = None, filter_by_machine = False, file_handler = None):
         raise NotImplementedError("requestWrite needs to be implemented")
@@ -144,6 +145,11 @@ class PrinterOutputDevice(QObject, OutputDevice):
     def canAbort(self):
         return self._can_abort
 
+    # Does the printer support manual control at all
+    @pyqtProperty(bool, constant=True)
+    def canControlManually(self):
+        return self._can_control_manually
+
     @pyqtProperty(QObject, constant=True)
     def monitorItem(self):
         # Note that we specifically only check if the monitor component is created.

cura/QualityManager.py

@@ -86,7 +86,7 @@ class QualityManager:
         qualities = set(quality_type_dict.values())
         for material_container in material_containers[1:]:
             next_quality_type_dict = self.__fetchQualityTypeDictForMaterial(machine_definition, material_container)
-            qualities.update(set(next_quality_type_dict.values()))
+            qualities.intersection_update(set(next_quality_type_dict.values()))
 
         return list(qualities)
 
@@ -177,12 +177,16 @@ class QualityManager:
     def findAllUsableQualitiesForMachineAndExtruders(self, global_container_stack: "GlobalStack", extruder_stacks: List["ExtruderStack"]) -> List[InstanceContainer]:
         global_machine_definition = global_container_stack.getBottom()
 
-        if extruder_stacks:
+        machine_manager = Application.getInstance().getMachineManager()
-            # Multi-extruder machine detected.
+        active_stack_id = machine_manager.activeStackId
-            materials = [stack.material for stack in extruder_stacks]
+
+        materials = []
+
+        for stack in extruder_stacks:
+            if stack.getId() == active_stack_id and machine_manager.newMaterial:
+                materials.append(machine_manager.newMaterial)
             else:
-            # Machine with one extruder.
+                materials.append(stack.material)
-            materials = [global_container_stack.material]
 
         quality_types = self.findAllQualityTypesForMachineAndMaterials(global_machine_definition, materials)
 

cura/Settings/CuraContainerRegistry.py

@@ -4,6 +4,7 @@
 import os
 import os.path
 import re
+import configparser
 
 from typing import Optional
 
@@ -19,6 +20,7 @@ from UM.Message import Message
 from UM.Platform import Platform
 from UM.PluginRegistry import PluginRegistry  # For getting the possible profile writers to write with.
 from UM.Util import parseBool
+from UM.Resources import Resources
 
 from . import ExtruderStack
 from . import GlobalStack
@@ -256,7 +258,8 @@ class CuraContainerRegistry(ContainerRegistry):
     @override(ContainerRegistry)
     def load(self):
         super().load()
-        self._fixupExtruders()
+        self._registerSingleExtrusionMachinesExtruderStacks()
+        self._connectUpgradedExtruderStacksToMachines()
 
     ##  Update an imported profile to match the current machine configuration.
     #
@@ -298,11 +301,17 @@ class CuraContainerRegistry(ContainerRegistry):
 
         machine_definition = Application.getInstance().getGlobalContainerStack().getBottom()
         del quality_type_criteria["definition"]
-        materials = None
+
+        # materials = None
+
         if "material" in quality_type_criteria:
-            materials = ContainerRegistry.getInstance().findInstanceContainers(id = quality_type_criteria["material"])
+            # materials = ContainerRegistry.getInstance().findInstanceContainers(id = quality_type_criteria["material"])
             del quality_type_criteria["material"]
 
+        # Do not filter quality containers here with materials because we are trying to import a profile, so it should
+        # NOT be restricted by the active materials on the current machine.
+        materials = None
+
         # Check to make sure the imported profile actually makes sense in context of the current configuration.
         # This prevents issues where importing a "draft" profile for a machine without "draft" qualities would report as
         # successfully imported but then fail to show up.
@@ -356,8 +365,8 @@ class CuraContainerRegistry(ContainerRegistry):
             return global_container_stack.material.getId()
         return ""
 
-    ##  Returns true if the current machien requires its own quality profiles
+    ##  Returns true if the current machine requires its own quality profiles
-    #   \return true if the current machien requires its own quality profiles
+    #   \return true if the current machine requires its own quality profiles
     def _machineHasOwnQualities(self):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
@@ -390,12 +399,135 @@ class CuraContainerRegistry(ContainerRegistry):
 
         return new_stack
 
+    def _registerSingleExtrusionMachinesExtruderStacks(self):
+        machines = self.findContainerStacks(type = "machine", machine_extruder_trains = {"0": "fdmextruder"})
+        for machine in machines:
+            extruder_stacks = self.findContainerStacks(type = "extruder_train", machine = machine.getId())
+            if not extruder_stacks:
+                self.addExtruderStackForSingleExtrusionMachine(machine, "fdmextruder")
+
+    def addExtruderStackForSingleExtrusionMachine(self, machine, extruder_id):
+        new_extruder_id = extruder_id
+
+        extruder_definitions = self.findDefinitionContainers(id = new_extruder_id)
+        if not extruder_definitions:
+            Logger.log("w", "Could not find definition containers for extruder %s", new_extruder_id)
+            return
+
+        extruder_definition = extruder_definitions[0]
+        unique_name = self.uniqueName(machine.getName() + " " + new_extruder_id)
+
+        extruder_stack = ExtruderStack.ExtruderStack(unique_name)
+        extruder_stack.setName(extruder_definition.getName())
+        extruder_stack.setDefinition(extruder_definition)
+        extruder_stack.addMetaDataEntry("position", extruder_definition.getMetaDataEntry("position"))
+        extruder_stack.setNextStack(machine)
+
+        # create empty user changes container otherwise
+        user_container = InstanceContainer(extruder_stack.id + "_user")
+        user_container.addMetaDataEntry("type", "user")
+        user_container.addMetaDataEntry("machine", extruder_stack.getId())
+        from cura.CuraApplication import CuraApplication
+        user_container.addMetaDataEntry("setting_version", CuraApplication.SettingVersion)
+        user_container.setDefinition(machine.definition)
+
+        if machine.userChanges:
+            # for the newly created extruder stack, we need to move all "per-extruder" settings to the user changes
+            # container to the extruder stack.
+            for user_setting_key in machine.userChanges.getAllKeys():
+                settable_per_extruder = machine.getProperty(user_setting_key, "settable_per_extruder")
+                if settable_per_extruder:
+                    user_container.addInstance(machine.userChanges.getInstance(user_setting_key))
+                    machine.userChanges.removeInstance(user_setting_key, postpone_emit = True)
+
+        extruder_stack.setUserChanges(user_container)
+        self.addContainer(user_container)
+
+        variant_id = "default"
+        if machine.variant.getId() not in ("empty", "empty_variant"):
+            variant_id = machine.variant.getId()
+        else:
+            variant_id = "empty_variant"
+        extruder_stack.setVariantById(variant_id)
+
+        material_id = "default"
+        if machine.material.getId() not in ("empty", "empty_material"):
+            material_id = machine.material.getId()
+        else:
+            material_id = "empty_material"
+        extruder_stack.setMaterialById(material_id)
+
+        quality_id = "default"
+        if machine.quality.getId() not in ("empty", "empty_quality"):
+            quality_id = machine.quality.getId()
+        else:
+            quality_id = "empty_quality"
+        extruder_stack.setQualityById(quality_id)
+
+        if machine.qualityChanges.getId() not in ("empty", "empty_quality_changes"):
+            extruder_quality_changes_container = self.findInstanceContainers(name = machine.qualityChanges.getName(), extruder = extruder_id)
+            if extruder_quality_changes_container:
+                extruder_quality_changes_container = extruder_quality_changes_container[0]
+                quality_changes_id = extruder_quality_changes_container.getId()
+                extruder_stack.setQualityChangesById(quality_changes_id)
+            else:
+                # Some extruder quality_changes containers can be created at runtime as files in the qualities
+                # folder. Those files won't be loaded in the registry immediately. So we also need to search
+                # the folder to see if the quality_changes exists.
+                extruder_quality_changes_container = self._findQualityChangesContainerInCuraFolder(machine.qualityChanges.getName())
+                if extruder_quality_changes_container:
+                    quality_changes_id = extruder_quality_changes_container.getId()
+                    extruder_stack.setQualityChangesById(quality_changes_id)
+
+            if not extruder_quality_changes_container:
+                Logger.log("w", "Could not find quality_changes named [%s] for extruder [%s]",
+                           machine.qualityChanges.getName(), extruder_stack.getId())
+        else:
+            extruder_stack.setQualityChangesById("empty_quality_changes")
+
+        self.addContainer(extruder_stack)
+
+        return extruder_stack
+
+    def _findQualityChangesContainerInCuraFolder(self, name):
+        quality_changes_dir = Resources.getPath(CuraApplication.ResourceTypes.QualityInstanceContainer)
+
+        instance_container = None
+
+        for item in os.listdir(quality_changes_dir):
+            file_path = os.path.join(quality_changes_dir, item)
+            if not os.path.isfile(file_path):
+                continue
+
+            parser = configparser.ConfigParser()
+            try:
+                parser.read([file_path])
+            except:
+                # skip, it is not a valid stack file
+                continue
+
+            if not parser.has_option("general", "name"):
+                continue
+
+            if parser["general"]["name"] == name:
+                # load the container
+                container_id = os.path.basename(file_path).replace(".inst.cfg", "")
+
+                instance_container = InstanceContainer(container_id)
+                with open(file_path, "r") as f:
+                    serialized = f.read()
+                instance_container.deserialize(serialized, file_path)
+                self.addContainer(instance_container)
+                break
+
+        return instance_container
+
     # Fix the extruders that were upgraded to ExtruderStack instances during addContainer.
     # The stacks are now responsible for setting the next stack on deserialize. However,
     # due to problems with loading order, some stacks may not have the proper next stack
     # set after upgrading, because the proper global stack was not yet loaded. This method
     # makes sure those extruders also get the right stack set.
-    def _fixupExtruders(self):
+    def _connectUpgradedExtruderStacksToMachines(self):
         extruder_stacks = self.findContainers(container_type = ExtruderStack.ExtruderStack)
         for extruder_stack in extruder_stacks:
             if extruder_stack.getNextStack():

cura/Settings/CuraContainerStack.py

@@ -41,9 +41,20 @@ class CuraContainerStack(ContainerStack):
     def __init__(self, container_id: str, *args, **kwargs):
         super().__init__(container_id, *args, **kwargs)
 
-        self._empty_instance_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+        self._container_registry = ContainerRegistry.getInstance()
+
+        self._empty_instance_container = self._container_registry.getEmptyInstanceContainer()
+
+        self._empty_quality_changes = self._container_registry.findInstanceContainers(id = "empty_quality_changes")[0]
+        self._empty_quality = self._container_registry.findInstanceContainers(id = "empty_quality")[0]
+        self._empty_material = self._container_registry.findInstanceContainers(id = "empty_material")[0]
+        self._empty_variant = self._container_registry.findInstanceContainers(id = "empty_variant")[0]
 
         self._containers = [self._empty_instance_container for i in range(len(_ContainerIndexes.IndexTypeMap))]
+        self._containers[_ContainerIndexes.QualityChanges] = self._empty_quality_changes
+        self._containers[_ContainerIndexes.Quality] = self._empty_quality
+        self._containers[_ContainerIndexes.Material] = self._empty_material
+        self._containers[_ContainerIndexes.Variant] = self._empty_variant
 
         self.containersChanged.connect(self._onContainersChanged)
 
@@ -110,7 +121,7 @@ class CuraContainerStack(ContainerStack):
     #
     #   \throws Exceptions.InvalidContainerError Raised when no container could be found with the specified ID.
     def setQualityById(self, new_quality_id: str) -> None:
-        quality = self._empty_instance_container
+        quality = self._empty_quality
         if new_quality_id == "default":
             new_quality = self.findDefaultQuality()
             if new_quality:
@@ -148,7 +159,7 @@ class CuraContainerStack(ContainerStack):
     #
     #   \throws Exceptions.InvalidContainerError Raised when no container could be found with the specified ID.
     def setMaterialById(self, new_material_id: str) -> None:
-        material = self._empty_instance_container
+        material = self._empty_material
         if new_material_id == "default":
             new_material = self.findDefaultMaterial()
             if new_material:
@@ -186,7 +197,7 @@ class CuraContainerStack(ContainerStack):
     #
     #   \throws Exceptions.InvalidContainerError Raised when no container could be found with the specified ID.
     def setVariantById(self, new_variant_id: str) -> None:
-        variant = self._empty_instance_container
+        variant = self._empty_variant
         if new_variant_id == "default":
             new_variant = self.findDefaultVariant()
             if new_variant:
@@ -348,8 +359,8 @@ class CuraContainerStack(ContainerStack):
     #
     #   \throws InvalidContainerStackError Raised when no definition can be found for the stack.
     @override(ContainerStack)
-    def deserialize(self, contents: str) -> None:
+    def deserialize(self, contents: str, file_name: Optional[str] = None) -> None:
-        super().deserialize(contents)
+        super().deserialize(contents, file_name)
 
         new_containers = self._containers.copy()
         while len(new_containers) < len(_ContainerIndexes.IndexTypeMap):
@@ -396,7 +407,9 @@ class CuraContainerStack(ContainerStack):
     #   \note This method assumes the stack has a valid machine definition.
     def findDefaultVariant(self) -> Optional[ContainerInterface]:
         definition = self._getMachineDefinition()
-        if not definition.getMetaDataEntry("has_variants"):
+        # has_variants can be overridden in other containers and stacks.
+        # In the case of UM2, it is overridden in the GlobalStack
+        if not self.getMetaDataEntry("has_variants"):
             # If the machine does not use variants, we should never set a variant.
             return None
 
@@ -454,7 +467,7 @@ class CuraContainerStack(ContainerStack):
         else:
             search_criteria["definition"] = "fdmprinter"
 
-        if self.material != self._empty_instance_container:
+        if self.material != self._empty_material:
             search_criteria["name"] = self.material.name
         else:
             preferred_material = definition.getMetaDataEntry("preferred_material")
@@ -501,7 +514,7 @@ class CuraContainerStack(ContainerStack):
         else:
             search_criteria["definition"] = "fdmprinter"
 
-        if self.quality != self._empty_instance_container:
+        if self.quality != self._empty_quality:
             search_criteria["name"] = self.quality.name
         else:
             preferred_quality = definition.getMetaDataEntry("preferred_quality")

cura/Settings/CuraStackBuilder.py

@@ -47,6 +47,24 @@ class CuraStackBuilder:
 
         new_global_stack.setName(generated_name)
 
+        extruder_definition = registry.findDefinitionContainers(machine = machine_definition.getId())
+
+        if not extruder_definition:
+            # create extruder stack for single extrusion machines that have no separate extruder definition files
+            extruder_definition = registry.findDefinitionContainers(id = "fdmextruder")[0]
+            new_extruder_id = registry.uniqueName(machine_definition.getName() + " " + extruder_definition.id)
+            new_extruder = cls.createExtruderStack(
+                new_extruder_id,
+                definition = extruder_definition,
+                machine_definition_id = machine_definition.getId(),
+                quality = "default",
+                material = "default",
+                variant = "default",
+                next_stack = new_global_stack
+            )
+            new_global_stack.addExtruder(new_extruder)
+        else:
+            # create extruder stack for each found extruder definition
             for extruder_definition in registry.findDefinitionContainers(machine = machine_definition.id):
                 position = extruder_definition.getMetaDataEntry("position", None)
                 if not position:
@@ -62,6 +80,7 @@ class CuraStackBuilder:
                     variant = "default",
                     next_stack = new_global_stack
                 )
+                new_global_stack.addExtruder(new_extruder)
 
         return new_global_stack
 
@@ -80,7 +99,9 @@ class CuraStackBuilder:
         stack.setName(definition.getName())
         stack.setDefinition(definition)
         stack.addMetaDataEntry("position", definition.getMetaDataEntry("position"))
-        if "next_stack" in kwargs: #Add stacks before containers are added, since they may trigger a setting update.
+
+        if "next_stack" in kwargs:
+            # Add stacks before containers are added, since they may trigger a setting update.
             stack.setNextStack(kwargs["next_stack"])
 
         user_container = InstanceContainer(new_stack_id + "_user")

cura/Settings/ExtruderManager.py

@@ -6,16 +6,13 @@ from UM.FlameProfiler import pyqtSlot
 
 from UM.Application import Application  # To get the global container stack to find the current machine.
 from UM.Logger import Logger
-from UM.Decorators import deprecated
 from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
 from UM.Scene.SceneNode import SceneNode
 from UM.Scene.Selection import Selection
 from UM.Scene.Iterator.BreadthFirstIterator import BreadthFirstIterator
 from UM.Settings.ContainerRegistry import ContainerRegistry  # Finding containers by ID.
-from UM.Settings.InstanceContainer import InstanceContainer
 from UM.Settings.SettingFunction import SettingFunction
 from UM.Settings.ContainerStack import ContainerStack
-from UM.Settings.Interfaces import DefinitionContainerInterface
 from UM.Settings.PropertyEvaluationContext import PropertyEvaluationContext
 from typing import Optional, List, TYPE_CHECKING, Union
 
@@ -28,6 +25,20 @@ if TYPE_CHECKING:
 #
 #   This keeps a list of extruder stacks for each machine.
 class ExtruderManager(QObject):
+
+    ##  Registers listeners and such to listen to changes to the extruders.
+    def __init__(self, parent = None):
+        super().__init__(parent)
+
+        self._extruder_trains = {}  # Per machine, a dictionary of extruder container stack IDs. Only for separately defined extruders.
+        self._active_extruder_index = -1  # Indicates the index of the active extruder stack. -1 means no active extruder stack
+        self._selected_object_extruders = []
+        self._global_container_stack_definition_id = None
+        self._addCurrentMachineExtruders()
+
+        Application.getInstance().globalContainerStackChanged.connect(self.__globalContainerStackChanged)
+        Selection.selectionChanged.connect(self.resetSelectedObjectExtruders)
+
     ##  Signal to notify other components when the list of extruders for a machine definition changes.
     extrudersChanged = pyqtSignal(QVariant)
 
@@ -38,18 +49,6 @@ class ExtruderManager(QObject):
     ##  Notify when the user switches the currently active extruder.
     activeExtruderChanged = pyqtSignal()
 
-    ##  Registers listeners and such to listen to changes to the extruders.
-    def __init__(self, parent = None):
-        super().__init__(parent)
-        self._extruder_trains = { } #Per machine, a dictionary of extruder container stack IDs. Only for separately defined extruders.
-        self._active_extruder_index = -1 # Indicates the index of the active extruder stack. -1 means no active extruder stack
-        self._selected_object_extruders = []
-        Application.getInstance().globalContainerStackChanged.connect(self.__globalContainerStackChanged)
-        self._global_container_stack_definition_id = None
-        self._addCurrentMachineExtruders()
-
-        Selection.selectionChanged.connect(self.resetSelectedObjectExtruders)
-
     ##  Gets the unique identifier of the currently active extruder stack.
     #
     #   The currently active extruder stack is the stack that is currently being
@@ -76,23 +75,23 @@ class ExtruderManager(QObject):
             return 0
 
     ##  Gets a dict with the extruder stack ids with the extruder number as the key.
-    #   The key "-1" indicates the global stack id.
-    #
     @pyqtProperty("QVariantMap", notify = extrudersChanged)
     def extruderIds(self):
         extruder_stack_ids = {}
+
         global_stack_id = Application.getInstance().getGlobalContainerStack().getId()
-        extruder_stack_ids["-1"] = global_stack_id
+
         if global_stack_id in self._extruder_trains:
             for position in self._extruder_trains[global_stack_id]:
                 extruder_stack_ids[position] = self._extruder_trains[global_stack_id][position].getId()
+
         return extruder_stack_ids
 
     @pyqtSlot(str, result = str)
-    def getQualityChangesIdByExtruderStackId(self, id: str) -> str:
+    def getQualityChangesIdByExtruderStackId(self, extruder_stack_id: str) -> str:
         for position in self._extruder_trains[Application.getInstance().getGlobalContainerStack().getId()]:
             extruder = self._extruder_trains[Application.getInstance().getGlobalContainerStack().getId()][position]
-            if extruder.getId() == id:
+            if extruder.getId() == extruder_stack_id:
                 return extruder.qualityChanges.getId()
 
     ##  The instance of the singleton pattern.
@@ -100,6 +99,10 @@ class ExtruderManager(QObject):
     #   It's None if the extruder manager hasn't been created yet.
     __instance = None
 
+    @staticmethod
+    def createExtruderManager():
+        return ExtruderManager().getInstance()
+
     ##  Gets an instance of the extruder manager, or creates one if no instance
     #   exists yet.
     #
@@ -185,6 +188,7 @@ class ExtruderManager(QObject):
             if global_container_stack.getId() in self._extruder_trains:
                 if str(self._active_extruder_index) in self._extruder_trains[global_container_stack.getId()]:
                     return self._extruder_trains[global_container_stack.getId()][str(self._active_extruder_index)]
+
         return None
 
     ##  Get an extruder stack by index
@@ -203,40 +207,6 @@ class ExtruderManager(QObject):
             result.append(self.getExtruderStack(i))
         return result
 
-    ##  Adds all extruders of a specific machine definition to the extruder
-    #   manager.
-    #
-    #   \param machine_definition   The machine definition to add the extruders for.
-    #   \param machine_id           The machine_id to add the extruders for.
-    @deprecated("Use CuraStackBuilder", "2.6")
-    def addMachineExtruders(self, machine_definition: DefinitionContainerInterface, machine_id: str) -> None:
-        changed = False
-        machine_definition_id = machine_definition.getId()
-        if machine_id not in self._extruder_trains:
-            self._extruder_trains[machine_id] = { }
-            changed = True
-        container_registry = ContainerRegistry.getInstance()
-        if container_registry:
-            # Add the extruder trains that don't exist yet.
-            for extruder_definition in container_registry.findDefinitionContainers(machine = machine_definition_id):
-                position = extruder_definition.getMetaDataEntry("position", None)
-                if not position:
-                    Logger.log("w", "Extruder definition %s specifies no position metadata entry.", extruder_definition.getId())
-                if not container_registry.findContainerStacksMetadata(machine = machine_id, position = position): # Doesn't exist yet.
-                    self.createExtruderTrain(extruder_definition, machine_definition, position, machine_id)
-                    changed = True
-
-            # Gets the extruder trains that we just created as well as any that still existed.
-            extruder_trains = container_registry.findContainerStacks(type = "extruder_train", machine = machine_id)
-            for extruder_train in extruder_trains:
-                self._extruder_trains[machine_id][extruder_train.getMetaDataEntry("position")] = extruder_train
-
-                # regardless of what the next stack is, we have to set it again, because of signal routing.
-                extruder_train.setNextStack(Application.getInstance().getGlobalContainerStack())
-                changed = True
-        if changed:
-            self.extrudersChanged.emit(machine_id)
-
     def registerExtruder(self, extruder_train, machine_id):
         changed = False
 
@@ -256,138 +226,6 @@ class ExtruderManager(QObject):
         if changed:
             self.extrudersChanged.emit(machine_id)
 
-    ##  Creates a container stack for an extruder train.
-    #
-    #   The container stack has an extruder definition at the bottom, which is
-    #   linked to a machine definition. Then it has a variant profile, a material
-    #   profile, a quality profile and a user profile, in that order.
-    #
-    #   The resulting container stack is added to the registry.
-    #
-    #   \param extruder_definition  The extruder to create the extruder train for.
-    #   \param machine_definition   The machine that the extruder train belongs to.
-    #   \param position             The position of this extruder train in the extruder slots of the machine.
-    #   \param machine_id           The id of the "global" stack this extruder is linked to.
-    @deprecated("Use CuraStackBuilder::createExtruderStack", "2.6")
-    def createExtruderTrain(self, extruder_definition: DefinitionContainerInterface, machine_definition: DefinitionContainerInterface,
-                            position, machine_id: str) -> None:
-        # Cache some things.
-        container_registry = ContainerRegistry.getInstance()
-        machine_definition_id = Application.getInstance().getMachineManager().getQualityDefinitionId(machine_definition)
-
-        # Create a container stack for this extruder.
-        extruder_stack_id = container_registry.uniqueName(extruder_definition.getId())
-        container_stack = ContainerStack(extruder_stack_id)
-        container_stack.setName(extruder_definition.getName())  # Take over the display name to display the stack with.
-        container_stack.addMetaDataEntry("type", "extruder_train")
-        container_stack.addMetaDataEntry("machine", machine_id)
-        container_stack.addMetaDataEntry("position", position)
-        container_stack.addContainer(extruder_definition)
-
-        # Find the variant to use for this extruder.
-        variant = container_registry.findInstanceContainers(id = "empty_variant")[0]
-        if machine_definition.getMetaDataEntry("has_variants"):
-            # First add any variant. Later, overwrite with preference if the preference is valid.
-            variants = container_registry.findInstanceContainers(definition = machine_definition_id, type = "variant")
-            if len(variants) >= 1:
-                variant = variants[0]
-            preferred_variant_id = machine_definition.getMetaDataEntry("preferred_variant")
-            if preferred_variant_id:
-                preferred_variants = container_registry.findInstanceContainers(id = preferred_variant_id, definition = machine_definition_id, type = "variant")
-                if len(preferred_variants) >= 1:
-                    variant = preferred_variants[0]
-                else:
-                    Logger.log("w", "The preferred variant \"%s\" of machine %s doesn't exist or is not a variant profile.", preferred_variant_id, machine_id)
-                    # And leave it at the default variant.
-        container_stack.addContainer(variant)
-
-        # Find a material to use for this variant.
-        material = container_registry.findInstanceContainers(id = "empty_material")[0]
-        if machine_definition.getMetaDataEntry("has_materials"):
-            # First add any material. Later, overwrite with preference if the preference is valid.
-            machine_has_variant_materials = machine_definition.getMetaDataEntry("has_variant_materials", default = False)
-            if machine_has_variant_materials or machine_has_variant_materials == "True":
-                materials = container_registry.findInstanceContainers(type = "material", definition = machine_definition_id, variant = variant.getId())
-            else:
-                materials = container_registry.findInstanceContainers(type = "material", definition = machine_definition_id)
-            if len(materials) >= 1:
-                material = materials[0]
-            preferred_material_id = machine_definition.getMetaDataEntry("preferred_material")
-            if preferred_material_id:
-                global_stack = ContainerRegistry.getInstance().findContainerStacks(id = machine_id)
-                if global_stack:
-                    approximate_material_diameter = str(round(global_stack[0].getProperty("material_diameter", "value")))
-                else:
-                    approximate_material_diameter = str(round(machine_definition.getProperty("material_diameter", "value")))
-
-                search_criteria = { "type": "material",  "id": preferred_material_id, "approximate_diameter": approximate_material_diameter}
-                if machine_definition.getMetaDataEntry("has_machine_materials"):
-                    search_criteria["definition"] = machine_definition_id
-
-                    if machine_definition.getMetaDataEntry("has_variants") and variant:
-                        search_criteria["variant"] = variant.id
-                else:
-                    search_criteria["definition"] = "fdmprinter"
-
-                preferred_materials = container_registry.findInstanceContainers(**search_criteria)
-                if len(preferred_materials) >= 1:
-                    # In some cases we get multiple materials. In that case, prefer materials that are marked as read only.
-                    read_only_preferred_materials = [preferred_material for preferred_material in preferred_materials if container_registry.isReadOnly(preferred_material.getId())]
-                    if len(read_only_preferred_materials) >= 1:
-                        material = read_only_preferred_materials[0]
-                    else:
-                        material = preferred_materials[0]
-                else:
-                    Logger.log("w", "The preferred material \"%s\" of machine %s doesn't exist or is not a material profile.", preferred_material_id, machine_id)
-                    # And leave it at the default material.
-        container_stack.addContainer(material)
-
-        # Find a quality to use for this extruder.
-        quality = container_registry.getEmptyInstanceContainer()
-
-        search_criteria = { "type": "quality" }
-        if machine_definition.getMetaDataEntry("has_machine_quality"):
-            search_criteria["definition"] = machine_definition_id
-            if machine_definition.getMetaDataEntry("has_materials") and material:
-                search_criteria["material"] = material.id
-        else:
-            search_criteria["definition"] = "fdmprinter"
-
-        preferred_quality = machine_definition.getMetaDataEntry("preferred_quality")
-        if preferred_quality:
-            search_criteria["id"] = preferred_quality
-
-        quality_containers = ContainerRegistry.getInstance().findInstanceContainers(**search_criteria)
-        if not quality_containers and preferred_quality:
-            Logger.log("w", "The preferred quality \"%s\" of machine %s doesn't exist or is not a quality profile.", preferred_quality, machine_id)
-            search_criteria.pop("id", None)
-            quality_containers = ContainerRegistry.getInstance().findInstanceContainers(**search_criteria)
-        if quality_containers:
-            quality = quality_containers[0]
-
-        container_stack.addContainer(quality)
-
-        empty_quality_changes = container_registry.findInstanceContainers(id = "empty_quality_changes")[0]
-        container_stack.addContainer(empty_quality_changes)
-
-        user_profile = container_registry.findInstanceContainers(type = "user", extruder = extruder_stack_id)
-        if user_profile: # There was already a user profile, loaded from settings.
-            user_profile = user_profile[0]
-        else:
-            user_profile = InstanceContainer(extruder_stack_id + "_current_settings")  # Add an empty user profile.
-            user_profile.addMetaDataEntry("type", "user")
-            user_profile.addMetaDataEntry("extruder", extruder_stack_id)
-            from cura.CuraApplication import CuraApplication
-            user_profile.addMetaDataEntry("setting_version", CuraApplication.SettingVersion)
-            user_profile.setDefinition(machine_definition.getId())
-            container_registry.addContainer(user_profile)
-        container_stack.addContainer(user_profile)
-
-        # regardless of what the next stack is, we have to set it again, because of signal routing.
-        container_stack.setNextStack(Application.getInstance().getGlobalContainerStack())
-
-        container_registry.addContainer(container_stack)
-
     def getAllExtruderValues(self, setting_key):
         return self.getAllExtruderSettings(setting_key, "value")
 
@@ -396,16 +234,12 @@ class ExtruderManager(QObject):
     #   \param setting_key  \type{str} The setting to get the property of.
     #   \param property  \type{str} The property to get.
     #   \return \type{List} the list of results
-    def getAllExtruderSettings(self, setting_key, property):
+    def getAllExtruderSettings(self, setting_key: str, prop: str):
-        global_container_stack = Application.getInstance().getGlobalContainerStack()
-        if global_container_stack.getProperty("machine_extruder_count", "value") <= 1:
-            return [global_container_stack.getProperty(setting_key, property)]
-
         result = []
         for index in self.extruderIds:
             extruder_stack_id = self.extruderIds[str(index)]
-            stack = ContainerRegistry.getInstance().findContainerStacks(id = extruder_stack_id)[0]
+            extruder_stack = ContainerRegistry.getInstance().findContainerStacks(id = extruder_stack_id)[0]
-            result.append(stack.getProperty(setting_key, property))
+            result.append(extruder_stack.getProperty(setting_key, prop))
         return result
 
     ##  Gets the extruder stacks that are actually being used at the moment.
@@ -422,20 +256,25 @@ class ExtruderManager(QObject):
         global_stack = Application.getInstance().getGlobalContainerStack()
         container_registry = ContainerRegistry.getInstance()
 
-        if global_stack.getProperty("machine_extruder_count", "value") <= 1: #For single extrusion.
-            return [global_stack]
-
         used_extruder_stack_ids = set()
 
-        #Get the extruders of all meshes in the scene.
+        # Get the extruders of all meshes in the scene
         support_enabled = False
         support_bottom_enabled = False
         support_roof_enabled = False
+
         scene_root = Application.getInstance().getController().getScene().getRoot()
-        meshes = [node for node in DepthFirstIterator(scene_root) if type(node) is SceneNode and node.isSelectable()] #Only use the nodes that will be printed.
+
+        # If no extruders are registered in the extruder manager yet, return an empty array
+        if len(self.extruderIds) == 0:
+            return []
+
+        # Get the extruders of all printable meshes in the scene
+        meshes = [node for node in DepthFirstIterator(scene_root) if type(node) is SceneNode and node.isSelectable()]
         for mesh in meshes:
             extruder_stack_id = mesh.callDecoration("getActiveExtruder")
-            if not extruder_stack_id: #No per-object settings for this node.
+            if not extruder_stack_id:
+                # No per-object settings for this node
                 extruder_stack_id = self.extruderIds["0"]
             used_extruder_stack_ids.add(extruder_stack_id)
 
@@ -474,6 +313,7 @@ class ExtruderManager(QObject):
         # The platform adhesion extruder. Not used if using none.
         if global_stack.getProperty("adhesion_type", "value") != "none":
             used_extruder_stack_ids.add(self.extruderIds[str(global_stack.getProperty("adhesion_extruder_nr", "value"))])
+
         try:
             return [container_registry.findContainerStacks(id = stack_id)[0] for stack_id in used_extruder_stack_ids]
         except IndexError:  # One or more of the extruders was not found.
@@ -520,10 +360,6 @@ class ExtruderManager(QObject):
         result = []
         machine_extruder_count = global_stack.getProperty("machine_extruder_count", "value")
 
-        # In case the printer is using one extruder, shouldn't exist active extruder stacks
-        if machine_extruder_count == 1:
-            return result
-
         if global_stack and global_stack.getId() in self._extruder_trains:
             for extruder in sorted(self._extruder_trains[global_stack.getId()]):
                 result.append(self._extruder_trains[global_stack.getId()][extruder])
@@ -536,24 +372,39 @@ class ExtruderManager(QObject):
             self._global_container_stack_definition_id = global_container_stack.getBottom().getId()
             self.globalContainerStackDefinitionChanged.emit()
 
-        # If the global container changed, the number of extruders could be changed and so the active_extruder_index is updated
+        # If the global container changed, the machine changed and might have extruders that were not registered yet
-        extruder_count = global_container_stack.getProperty("machine_extruder_count", "value")
+        self._addCurrentMachineExtruders()
-        if extruder_count > 1:
-            if self._active_extruder_index == -1:
-                self.setActiveExtruderIndex(0)
-        else:
-            if self._active_extruder_index != -1:
-                self.setActiveExtruderIndex(-1)
-
-        self.activeExtruderChanged.emit()
 
         self.resetSelectedObjectExtruders()
 
     ##  Adds the extruders of the currently active machine.
     def _addCurrentMachineExtruders(self) -> None:
         global_stack = Application.getInstance().getGlobalContainerStack()
-        if global_stack and global_stack.getBottom():
+        extruders_changed = False
-            self.addMachineExtruders(global_stack.getBottom(), global_stack.getId())
+
+        if global_stack:
+            container_registry = ContainerRegistry.getInstance()
+            global_stack_id = global_stack.getId()
+
+            # Gets the extruder trains that we just created as well as any that still existed.
+            extruder_trains = container_registry.findContainerStacks(type = "extruder_train", machine = global_stack_id)
+
+            # Make sure the extruder trains for the new machine can be placed in the set of sets
+            if global_stack_id not in self._extruder_trains:
+                self._extruder_trains[global_stack_id] = {}
+                extruders_changed = True
+
+            # Register the extruder trains by position
+            for extruder_train in extruder_trains:
+                self._extruder_trains[global_stack_id][extruder_train.getMetaDataEntry("position")] = extruder_train
+
+                # regardless of what the next stack is, we have to set it again, because of signal routing. ???
+                extruder_train.setNextStack(global_stack)
+                extruders_changed = True
+
+            if extruders_changed:
+                self.extrudersChanged.emit(global_stack_id)
+                self.setActiveExtruderIndex(0)
 
     ##  Get all extruder values for a certain setting.
     #
@@ -632,7 +483,7 @@ class ExtruderManager(QObject):
     #
     #   This is exposed to qml for display purposes
     #
-    #   \param key The key of the setting to retieve values for.
+    #   \param key The key of the setting to retrieve values for.
     #
     #   \return String representing the extruder values
     @pyqtSlot(str, result="QVariant")
@@ -656,7 +507,8 @@ class ExtruderManager(QObject):
             value = extruder.getRawProperty(key, "value")
             if isinstance(value, SettingFunction):
                 value = value(extruder)
-        else: #Just a value from global.
+        else:
+            # Just a value from global.
             value = Application.getInstance().getGlobalContainerStack().getProperty(key, "value")
 
         return value

cura/Settings/ExtruderStack.py

@@ -92,8 +92,8 @@ class ExtruderStack(CuraContainerStack):
         return self.getNextStack()._getMachineDefinition()
 
     @override(CuraContainerStack)
-    def deserialize(self, contents: str) -> None:
+    def deserialize(self, contents: str, file_name: Optional[str] = None) -> None:
-        super().deserialize(contents)
+        super().deserialize(contents, file_name)
         stacks = ContainerRegistry.getInstance().findContainerStacks(id=self.getMetaDataEntry("machine", ""))
         if stacks:
             self.setNextStack(stacks[0])
@@ -115,6 +115,11 @@ class ExtruderStack(CuraContainerStack):
             if has_global_dependencies:
                 self.getNextStack().propertiesChanged.emit(key, properties)
 
+    def findDefaultVariant(self):
+        # The default variant is defined in the machine stack and/or definition, so use the machine stack to find
+        # the default variant.
+        return self.getNextStack().findDefaultVariant()
+
 
 extruder_stack_mime = MimeType(
     name = "application/x-cura-extruderstack",

cura/Settings/ExtrudersModel.py

@@ -74,10 +74,10 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
         self._active_machine_extruders = []  # type: Iterable[ExtruderStack]
         self._add_optional_extruder = False
 
-        #Listen to changes.
+        # Listen to changes
-        Application.getInstance().globalContainerStackChanged.connect(self._extrudersChanged) #When the machine is swapped we must update the active machine extruders.
+        Application.getInstance().globalContainerStackChanged.connect(self._extrudersChanged)  # When the machine is swapped we must update the active machine extruders
-        ExtruderManager.getInstance().extrudersChanged.connect(self._extrudersChanged) #When the extruders change we must link to the stack-changed signal of the new extruder.
+        ExtruderManager.getInstance().extrudersChanged.connect(self._extrudersChanged)  # When the extruders change we must link to the stack-changed signal of the new extruder
-        self._extrudersChanged() #Also calls _updateExtruders.
+        self._extrudersChanged()  # Also calls _updateExtruders
 
     def setAddGlobal(self, add):
         if add != self._add_global:
@@ -128,14 +128,17 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
     def _extrudersChanged(self, machine_id = None):
         if machine_id is not None:
             if Application.getInstance().getGlobalContainerStack() is None:
-                return #No machine, don't need to update the current machine's extruders.
+                # No machine, don't need to update the current machine's extruders
+                return
             if machine_id != Application.getInstance().getGlobalContainerStack().getId():
-                return #Not the current machine.
+                # Not the current machine
-        #Unlink from old extruders.
+                return
+
+        # Unlink from old extruders
         for extruder in self._active_machine_extruders:
             extruder.containersChanged.disconnect(self._onExtruderStackContainersChanged)
 
-        #Link to new extruders.
+        # Link to new extruders
         self._active_machine_extruders = []
         extruder_manager = ExtruderManager.getInstance()
         for extruder in extruder_manager.getExtruderStacks():
@@ -150,7 +153,6 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
             # The ExtrudersModel needs to be updated when the material-name or -color changes, because the user identifies extruders by material-name
             self._updateExtruders()
 
-
     modelChanged = pyqtSignal()
 
     def _updateExtruders(self):
@@ -161,14 +163,17 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
     #   This should be called whenever the list of extruders changes.
     @UM.FlameProfiler.profile
     def __updateExtruders(self):
-        changed = False
+        extruders_changed = False
 
         if self.rowCount() != 0:
-            changed = True
+            extruders_changed = True
 
         items = []
+
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
+
+            # TODO: remove this - CURA-4482
             if self._add_global:
                 material = global_container_stack.material
                 color = material.getMetaDataEntry("color_code", default = self.defaultColors[0]) if material else self.defaultColors[0]
@@ -180,40 +185,44 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
                     "definition": ""
                 }
                 items.append(item)
-                changed = True
+                extruders_changed = True
 
+            # get machine extruder count for verification
             machine_extruder_count = global_container_stack.getProperty("machine_extruder_count", "value")
-            manager = ExtruderManager.getInstance()
+
-            for extruder in manager.getMachineExtruders(global_container_stack.getId()):
+            for extruder in ExtruderManager.getInstance().getMachineExtruders(global_container_stack.getId()):
                 position = extruder.getMetaDataEntry("position", default = "0")  # Get the position
                 try:
                     position = int(position)
-                except ValueError: #Not a proper int.
+                except ValueError:
+                    # Not a proper int.
                     position = -1
                 if position >= machine_extruder_count:
                     continue
-                extruder_name = extruder.getName()
-                material = extruder.material
-                variant = extruder.variant
 
-                default_color = self.defaultColors[position] if position >= 0 and position < len(self.defaultColors) else self.defaultColors[0]
+                default_color = self.defaultColors[position] if 0 <= position < len(self.defaultColors) else self.defaultColors[0]
-                color = material.getMetaDataEntry("color_code", default = default_color) if material else default_color
+                color = extruder.material.getMetaDataEntry("color_code", default = default_color) if extruder.material else default_color
-                item = { #Construct an item with only the relevant information.
+
+                # construct an item with only the relevant information
+                item = {
                     "id": extruder.getId(),
-                    "name": extruder_name,
+                    "name": extruder.getName(),
                     "color": color,
                     "index": position,
                     "definition": extruder.getBottom().getId(),
-                    "material": material.getName() if material else "",
+                    "material": extruder.material.getName() if extruder.material else "",
-                    "variant": variant.getName() if variant else "",
+                    "variant": extruder.variant.getName() if extruder.variant else "",  # e.g. print core
                 }
-                items.append(item)
-                changed = True
 
-        if changed:
+                items.append(item)
+                extruders_changed = True
+
+        if extruders_changed:
+            # sort by extruder index
             items.sort(key = lambda i: i["index"])
+
             # We need optional extruder to be last, so add it after we do sorting.
-            # This way we can simply intrepret the -1 of the index as the last item (which it now always is)
+            # This way we can simply interpret the -1 of the index as the last item (which it now always is)
             if self._add_optional_extruder:
                 item = {
                     "id": "",
@@ -223,5 +232,6 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
                     "definition": ""
                 }
                 items.append(item)
+
             self.setItems(items)
             self.modelChanged.emit()

cura/Settings/GlobalStack.py

@@ -25,7 +25,7 @@ class GlobalStack(CuraContainerStack):
 
         self.addMetaDataEntry("type", "machine")  # For backward compatibility
 
-        self._extruders = {}
+        self._extruders = {}  # type: Dict[str, "ExtruderStack"]
 
         # This property is used to track which settings we are calculating the "resolve" for
         # and if so, to bypass the resolve to prevent an infinite recursion that would occur
@@ -57,13 +57,6 @@ class GlobalStack(CuraContainerStack):
     #   \throws Exceptions.TooManyExtrudersError Raised when trying to add an extruder while we
     #                                            already have the maximum number of extruders.
     def addExtruder(self, extruder: ContainerStack) -> None:
-        extruder_count = self.getProperty("machine_extruder_count", "value")
-
-        if extruder_count <= 1:
-            Logger.log("i", "Not adding extruder[%s] to [%s] because it is a single-extrusion machine.",
-                       extruder.id, self.id)
-            return
-
         position = extruder.getMetaDataEntry("position")
         if position is None:
             Logger.log("w", "No position defined for extruder {extruder}, cannot add it to stack {stack}", extruder = extruder.id, stack = self.id)

cura/Settings/MachineManager.py

@@ -47,6 +47,11 @@ class MachineManager(QObject):
         self._active_container_stack = None     # type: CuraContainerStack
         self._global_container_stack = None     # type: GlobalStack
 
+        # Used to store the new containers until after confirming the dialog
+        self._new_variant_container = None
+        self._new_material_container = None
+        self._new_quality_containers = []
+
         self._error_check_timer = QTimer()
         self._error_check_timer.setInterval(250)
         self._error_check_timer.setSingleShot(True)
@@ -58,6 +63,7 @@ class MachineManager(QObject):
         self._instance_container_timer.timeout.connect(self.__onInstanceContainersChanged)
 
         Application.getInstance().globalContainerStackChanged.connect(self._onGlobalContainerChanged)
+
         ##  When the global container is changed, active material probably needs to be updated.
         self.globalContainerChanged.connect(self.activeMaterialChanged)
         self.globalContainerChanged.connect(self.activeVariantChanged)
@@ -65,10 +71,10 @@ class MachineManager(QObject):
 
         self._stacks_have_errors = None
 
-        self._empty_variant_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+        self._empty_variant_container = ContainerRegistry.getInstance().findContainers(id = "empty_variant")[0]
-        self._empty_material_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+        self._empty_material_container = ContainerRegistry.getInstance().findContainers(id = "empty_material")[0]
-        self._empty_quality_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+        self._empty_quality_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality")[0]
-        self._empty_quality_changes_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+        self._empty_quality_changes_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality_changes")[0]
 
         self._onGlobalContainerChanged()
 
@@ -84,6 +90,9 @@ class MachineManager(QObject):
         ExtruderManager.getInstance().activeExtruderChanged.connect(self.activeStackChanged)
         self.activeStackChanged.connect(self.activeStackValueChanged)
 
+        # when a user closed dialog check if any delayed material or variant changes need to be applied
+        Application.getInstance().onDiscardOrKeepProfileChangesClosed.connect(self._executeDelayedActiveContainerStackChanges)
+
         Preferences.getInstance().addPreference("cura/active_machine", "")
 
         self._global_event_keys = set()
@@ -98,7 +107,6 @@ class MachineManager(QObject):
         if active_machine_id != "" and ContainerRegistry.getInstance().findContainerStacksMetadata(id = active_machine_id):
             # An active machine was saved, so restore it.
             self.setActiveMachine(active_machine_id)
-            if self._global_container_stack and self._global_container_stack.getProperty("machine_extruder_count", "value") > 1:
             # Make sure _active_container_stack is properly initiated
             ExtruderManager.getInstance().setActiveExtruderIndex(0)
 
@@ -139,6 +147,14 @@ class MachineManager(QObject):
 
         self.outputDevicesChanged.emit()
 
+    @property
+    def newVariant(self):
+        return self._new_variant_container
+
+    @property
+    def newMaterial(self):
+        return self._new_material_container
+
     @pyqtProperty("QVariantList", notify = outputDevicesChanged)
     def printerOutputDevices(self):
         return self._printer_output_devices
@@ -257,53 +273,39 @@ class MachineManager(QObject):
                 self._global_container_stack.propertyChanged.disconnect(self._onPropertyChanged)
             except TypeError:
                 pass
-            material = self._global_container_stack.material
-            material.nameChanged.disconnect(self._onMaterialNameChanged)
 
-            quality = self._global_container_stack.quality
-            quality.nameChanged.disconnect(self._onQualityNameChanged)
-
-            if self._global_container_stack.getProperty("machine_extruder_count", "value") > 1:
             for extruder_stack in ExtruderManager.getInstance().getActiveExtruderStacks():
                 extruder_stack.propertyChanged.disconnect(self._onPropertyChanged)
                 extruder_stack.containersChanged.disconnect(self._onInstanceContainersChanged)
 
+        # update the local global container stack reference
         self._global_container_stack = Application.getInstance().getGlobalContainerStack()
 
         self.globalContainerChanged.emit()
 
+        # after switching the global stack we reconnect all the signals and set the variant and material references
         if self._global_container_stack:
             Preferences.getInstance().setValue("cura/active_machine", self._global_container_stack.getId())
+
             self._global_container_stack.nameChanged.connect(self._onMachineNameChanged)
             self._global_container_stack.containersChanged.connect(self._onInstanceContainersChanged)
             self._global_container_stack.propertyChanged.connect(self._onPropertyChanged)
 
-            if self._global_container_stack.getProperty("machine_extruder_count", "value") > 1:
+            # set the global variant to empty as we now use the extruder stack at all times - CURA-4482
-                # For multi-extrusion machines, we do not want variant or material profiles in the stack,
-                # because these are extruder specific and may cause wrong values to be used for extruders
-                # that did not specify a value in the extruder.
             global_variant = self._global_container_stack.variant
             if global_variant != self._empty_variant_container:
                 self._global_container_stack.setVariant(self._empty_variant_container)
 
+            # set the global material to empty as we now use the extruder stack at all times - CURA-4482
             global_material = self._global_container_stack.material
             if global_material != self._empty_material_container:
                 self._global_container_stack.setMaterial(self._empty_material_container)
 
-                for extruder_stack in ExtruderManager.getInstance().getActiveExtruderStacks(): #Listen for changes on all extruder stacks.
+            # Listen for changes on all extruder stacks
+            for extruder_stack in ExtruderManager.getInstance().getActiveExtruderStacks():
                 extruder_stack.propertyChanged.connect(self._onPropertyChanged)
                 extruder_stack.containersChanged.connect(self._onInstanceContainersChanged)
 
-            else:
-                material = self._global_container_stack.material
-                material.nameChanged.connect(self._onMaterialNameChanged)
-
-                quality = self._global_container_stack.quality
-                quality.nameChanged.connect(self._onQualityNameChanged)
-
-                self._active_container_stack = self._global_container_stack
-                self.activeStackChanged.emit()
-
         self._error_check_timer.start()
 
     ##  Update self._stacks_valid according to _checkStacksForErrors and emit if change.
@@ -319,8 +321,6 @@ class MachineManager(QObject):
         old_active_container_stack = self._active_container_stack
 
         self._active_container_stack = ExtruderManager.getInstance().getActiveExtruderStack()
-        if not self._active_container_stack:
-            self._active_container_stack = self._global_container_stack
 
         self._error_check_timer.start()
 
@@ -333,6 +333,7 @@ class MachineManager(QObject):
         self.activeQualityChanged.emit()
         self.activeVariantChanged.emit()
         self.activeMaterialChanged.emit()
+        self._updateStacksHaveErrors()  # Prevents unwanted re-slices after changing machine
         self._error_check_timer.start()
 
     def _onInstanceContainersChanged(self, container):
@@ -349,6 +350,8 @@ class MachineManager(QObject):
     @pyqtSlot(str)
     def setActiveMachine(self, stack_id: str) -> None:
         self.blurSettings.emit()  # Ensure no-one has focus.
+        self._cancelDelayedActiveContainerStackChanges()
+
         containers = ContainerRegistry.getInstance().findContainerStacks(id = stack_id)
         if containers:
             Application.getInstance().setGlobalContainerStack(containers[0])
@@ -364,15 +367,6 @@ class MachineManager(QObject):
         else:
             Logger.log("w", "Failed creating a new machine!")
 
-    ##  Create a name that is not empty and unique
-    #   \param container_type \type{string} Type of the container (machine, quality, ...)
-    #   \param current_name \type{} Current name of the container, which may be an acceptable option
-    #   \param new_name \type{string} Base name, which may not be unique
-    #   \param fallback_name \type{string} Name to use when (stripped) new_name is empty
-    #   \return \type{string} Name that is unique for the specified type and name/id
-    def _createUniqueName(self, container_type: str, current_name: str, new_name: str, fallback_name: str) -> str:
-        return ContainerRegistry.getInstance().createUniqueName(container_type, current_name, new_name, fallback_name)
-
     def _checkStacksHaveErrors(self) -> bool:
         if self._global_container_stack is None: #No active machine.
             return False
@@ -626,12 +620,17 @@ class MachineManager(QObject):
     @pyqtProperty(str, notify=activeQualityChanged)
     def activeQualityId(self) -> str:
         if self._active_container_stack:
-            quality = self._active_container_stack.qualityChanges
-            if quality and not isinstance(quality, type(self._empty_quality_changes_container)):
-                return quality.getId()
             quality = self._active_container_stack.quality
-            if quality:
+            if isinstance(quality, type(self._empty_quality_container)):
+                return ""
+            quality_changes = self._active_container_stack.qualityChanges
+            if quality and quality_changes:
+                if isinstance(quality_changes, type(self._empty_quality_changes_container)):
+                    # It's a built-in profile
                     return quality.getId()
+                else:
+                    # Custom profile
+                    return quality_changes.getId()
         return ""
 
     @pyqtProperty(str, notify=activeQualityChanged)
@@ -696,9 +695,9 @@ class MachineManager(QObject):
     @pyqtProperty(str, notify = activeQualityChanged)
     def activeQualityChangesId(self) -> str:
         if self._active_container_stack:
-            changes = self._active_container_stack.qualityChanges
+            quality_changes = self._active_container_stack.qualityChanges
-            if changes and changes.getId() != "empty":
+            if quality_changes and not isinstance(quality_changes, type(self._empty_quality_changes_container)):
-                return changes.getId()
+                return quality_changes.getId()
         return ""
 
     ## Check if a container is read_only
@@ -709,15 +708,13 @@ class MachineManager(QObject):
     ## Copy the value of the setting of the current extruder to all other extruders as well as the global container.
     @pyqtSlot(str)
     def copyValueToExtruders(self, key: str):
-        if not self._active_container_stack or self._global_container_stack.getProperty("machine_extruder_count", "value") <= 1:
-            return
-
         new_value = self._active_container_stack.getProperty(key, "value")
-        stacks = [stack for stack in ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())]
+        extruder_stacks = [stack for stack in ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())]
-        stacks.append(self._global_container_stack)
+
-        for extruder_stack in stacks:
+        # check in which stack the value has to be replaced
+        for extruder_stack in extruder_stacks:
             if extruder_stack != self._active_container_stack and extruder_stack.getProperty(key, "value") != new_value:
-                extruder_stack.getTop().setProperty(key, "value", new_value)
+                extruder_stack.userChanges.setProperty(key, "value", new_value)  # TODO: nested property access, should be improved
 
     ## Set the active material by switching out a container
     #  Depending on from/to material+current variant, a quality profile is chosen and set.
@@ -744,7 +741,7 @@ class MachineManager(QObject):
             self.blurSettings.emit()
             old_material.nameChanged.disconnect(self._onMaterialNameChanged)
 
-            self._active_container_stack.material = material_container
+            self._new_material_container = material_container   # self._active_container_stack will be updated with a delay
             Logger.log("d", "Active material changed")
 
             material_container.nameChanged.connect(self._onMaterialNameChanged)
@@ -763,13 +760,14 @@ class MachineManager(QObject):
                 quality_type = old_quality_changes.getMetaDataEntry("quality_type")
                 new_quality_id = old_quality_changes.getId()
 
-            # See if the requested quality type is available in the new situation.
+            global_stack = Application.getInstance().getGlobalContainerStack()
-            machine_definition = self._active_container_stack.getBottom()
+            if global_stack:
                 quality_manager = QualityManager.getInstance()
+
                 candidate_quality = None
                 if quality_type:
                     candidate_quality = quality_manager.findQualityByQualityType(quality_type,
-                                        quality_manager.getWholeMachineDefinition(machine_definition),
+                                            quality_manager.getWholeMachineDefinition(global_stack.definition),
                                             [material_container])
 
                 if not candidate_quality or isinstance(candidate_quality, type(self._empty_quality_changes_container)):
@@ -798,13 +796,13 @@ class MachineManager(QObject):
             old_material = self._active_container_stack.material
             if old_variant:
                 self.blurSettings.emit()
-                self._active_container_stack.variant = containers[0]
+                self._new_variant_container = containers[0]  # self._active_container_stack will be updated with a delay
                 Logger.log("d", "Active variant changed to {active_variant_id}".format(active_variant_id = containers[0].getId()))
                 preferred_material_name = None
                 if old_material:
                     preferred_material_name = old_material.getName()
-
+                preferred_material_id = self._updateMaterialContainer(self._global_container_stack.getBottom(), self._global_container_stack, containers[0], preferred_material_name).id
-                self.setActiveMaterial(self._updateMaterialContainer(self._global_container_stack.getBottom(), self._global_container_stack, containers[0], preferred_material_name).id)
+                self.setActiveMaterial(preferred_material_id)
             else:
                 Logger.log("w", "While trying to set the active variant, no variant was found to replace.")
 
@@ -819,8 +817,6 @@ class MachineManager(QObject):
             if not containers or not self._global_container_stack:
                 return
 
-            Logger.log("d", "Attempting to change the active quality to %s", quality_id)
-
             # Quality profile come in two flavours: type=quality and type=quality_changes
             # If we found a quality_changes profile then look up its parent quality profile.
             container_type = containers[0].get("type")
@@ -840,30 +836,74 @@ class MachineManager(QObject):
             if new_quality_settings_list is None:
                 return
 
-            name_changed_connect_stacks = []  # Connect these stacks to the name changed callback
+            # check if any of the stacks have a not supported profile
+            # if that is the case, all stacks should have a not supported state (otherwise it will show quality_type normal)
+            has_not_supported_quality = False
+
+            # check all stacks for not supported
+            for setting_info in new_quality_settings_list:
+                if setting_info["quality"].getMetaDataEntry("quality_type") == "not_supported":
+                    has_not_supported_quality = True
+                    break
+
+            # set all stacks to not supported if that's the case
+            if has_not_supported_quality:
+                for setting_info in new_quality_settings_list:
+                    setting_info["quality"] = self._empty_quality_container
+
+            self._new_quality_containers.clear()
+
+            # store the upcoming quality profile changes per stack for later execution
+            # this prevents re-slicing before the user has made a choice in the discard or keep dialog
+            # (see _executeDelayedActiveContainerStackChanges)
             for setting_info in new_quality_settings_list:
                 stack = setting_info["stack"]
                 stack_quality = setting_info["quality"]
                 stack_quality_changes = setting_info["quality_changes"]
 
-                name_changed_connect_stacks.append(stack_quality)
+                self._new_quality_containers.append({
-                name_changed_connect_stacks.append(stack_quality_changes)
+                    "stack": stack,
-                self._replaceQualityOrQualityChangesInStack(stack, stack_quality, postpone_emit=True)
+                    "quality": stack_quality,
-                self._replaceQualityOrQualityChangesInStack(stack, stack_quality_changes, postpone_emit=True)
+                    "quality_changes": stack_quality_changes
+                })
 
-            # Send emits that are postponed in replaceContainer.
+            # show the keep/discard dialog after the containers have been switched. Otherwise, the default values on
-            # Here the stacks are finished replacing and every value can be resolved based on the current state.
+            # the dialog will be the those before the switching.
-            for setting_info in new_quality_settings_list:
+            self._executeDelayedActiveContainerStackChanges()
-                setting_info["stack"].sendPostponedEmits()
-
-            # Connect to onQualityNameChanged
-            for stack in name_changed_connect_stacks:
-                stack.nameChanged.connect(self._onQualityNameChanged)
 
             if self.hasUserSettings and Preferences.getInstance().getValue("cura/active_mode") == 1:
-                self._askUserToKeepOrClearCurrentSettings()
+                Application.getInstance().discardOrKeepProfileChanges()
 
-            self.activeQualityChanged.emit()
+    ##  Used to update material and variant in the active container stack with a delay.
+    #   This delay prevents the stack from triggering a lot of signals (eventually resulting in slicing)
+    #   before the user decided to keep or discard any of their changes using the dialog.
+    #   The Application.onDiscardOrKeepProfileChangesClosed signal triggers this method.
+    def _executeDelayedActiveContainerStackChanges(self):
+        if self._new_variant_container is not None:
+            self._active_container_stack.variant = self._new_variant_container
+            self._new_variant_container = None
+
+        if self._new_material_container is not None:
+            self._active_container_stack.material = self._new_material_container
+            self._new_material_container = None
+
+        # apply the new quality to all stacks
+        if self._new_quality_containers:
+            for new_quality in self._new_quality_containers:
+                self._replaceQualityOrQualityChangesInStack(new_quality["stack"], new_quality["quality"], postpone_emit = True)
+                self._replaceQualityOrQualityChangesInStack(new_quality["stack"], new_quality["quality_changes"], postpone_emit = True)
+
+            for new_quality in self._new_quality_containers:
+                new_quality["stack"].nameChanged.connect(self._onQualityNameChanged)
+                new_quality["stack"].sendPostponedEmits() # Send the signals that were postponed in _replaceQualityOrQualityChangesInStack
+
+            self._new_quality_containers.clear()
+
+    ##  Cancel set changes for material and variant in the active container stack.
+    #   Used for ignoring any changes when switching between printers (setActiveMachine)
+    def _cancelDelayedActiveContainerStackChanges(self):
+        self._new_material_container = None
+        self._new_variant_container = None
 
     ##  Determine the quality and quality changes settings for the current machine for a quality name.
     #
@@ -877,29 +917,46 @@ class MachineManager(QObject):
         global_container_stack = self._global_container_stack
         if not global_container_stack:
             return []
+
         global_machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.getBottom())
-
         extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
-        if extruder_stacks:
-            stacks = extruder_stacks
-        else:
-            stacks = [global_container_stack]
 
-        for stack in stacks:
+        # find qualities for extruders
-            material = stack.material
+        for extruder_stack in extruder_stacks:
+            material = extruder_stack.material
+
+            # TODO: fix this
+            if self._new_material_container and extruder_stack.getId() == self._active_container_stack.getId():
+                material = self._new_material_container
+
             quality = quality_manager.findQualityByQualityType(quality_type, global_machine_definition, [material])
-            if not quality: #No quality profile is found for this quality type.
-                quality = self._empty_quality_container
-            result.append({"stack": stack, "quality": quality, "quality_changes": empty_quality_changes})
 
-        if extruder_stacks:
+            if not quality:
-            # Add an extra entry for the global stack.
+                # No quality profile is found for this quality type.
+                quality = self._empty_quality_container
+
+            result.append({
+                "stack": extruder_stack,
+                "quality": quality,
+                "quality_changes": empty_quality_changes
+            })
+
+        # also find a global quality for the machine
         global_quality = quality_manager.findQualityByQualityType(quality_type, global_machine_definition, [], global_quality = "True")
 
+        # if there is not global quality but we're using a single extrusion machine, copy the quality of the first extruder - CURA-4482
+        if not global_quality and len(extruder_stacks) == 1:
+            global_quality = result[0]["quality"]
+
+        # if there is still no global quality, set it to empty (not supported)
         if not global_quality:
             global_quality = self._empty_quality_container
 
-            result.append({"stack": global_container_stack, "quality": global_quality, "quality_changes": empty_quality_changes})
+        result.append({
+            "stack": global_container_stack,
+            "quality": global_quality,
+            "quality_changes": empty_quality_changes
+        })
 
         return result
 
@@ -912,10 +969,8 @@ class MachineManager(QObject):
         quality_manager = QualityManager.getInstance()
 
         global_container_stack = self._global_container_stack
-        global_machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.getBottom())
+        global_machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.definition)
-
+        quality_changes_profiles = quality_manager.findQualityChangesByName(quality_changes_name, global_machine_definition)
-        quality_changes_profiles = quality_manager.findQualityChangesByName(quality_changes_name,
-                                                                            global_machine_definition)
 
         global_quality_changes = [qcp for qcp in quality_changes_profiles if qcp.getMetaDataEntry("extruder") is None]
         if global_quality_changes:
@@ -923,26 +978,25 @@ class MachineManager(QObject):
         else:
             Logger.log("e", "Could not find the global quality changes container with name %s", quality_changes_name)
             return None
+
         material = global_container_stack.material
 
+        # find a quality type that matches both machine and materials
+        if self._new_material_container and self._active_container_stack.getId() == global_container_stack.getId():
+            material = self._new_material_container
+
         # For the global stack, find a quality which matches the quality_type in
         # the quality changes profile and also satisfies any material constraints.
         quality_type = global_quality_changes.getMetaDataEntry("quality_type")
-        if global_container_stack.getProperty("machine_extruder_count", "value") > 1:
-            global_quality = quality_manager.findQualityByQualityType(quality_type, global_machine_definition, [], global_quality = True)
-        else:
-            global_quality = quality_manager.findQualityByQualityType(quality_type, global_machine_definition, [material])
-        if not global_quality:
-            global_quality = self._empty_quality_container
 
-        # Find the values for each extruder.
         extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
 
-        for stack in extruder_stacks:
+        # append the extruder quality changes
-            extruder_definition = quality_manager.getParentMachineDefinition(stack.getBottom())
+        for extruder_stack in extruder_stacks:
+            extruder_definition = quality_manager.getParentMachineDefinition(extruder_stack.definition)
+
+            quality_changes_list = [qcp for qcp in quality_changes_profiles if qcp.getMetaDataEntry("extruder") == extruder_definition.getId()]
 
-            quality_changes_list = [qcp for qcp in quality_changes_profiles
-                                    if qcp.getMetaDataEntry("extruder") == extruder_definition.getId()]
             if quality_changes_list:
                 quality_changes = quality_changes_list[0]
             else:
@@ -950,20 +1004,39 @@ class MachineManager(QObject):
             if not quality_changes:
                 quality_changes = self._empty_quality_changes_container
 
-            material = stack.material
+            material = extruder_stack.material
+
+            if self._new_material_container and self._active_container_stack.getId() == extruder_stack.getId():
+                material = self._new_material_container
+
             quality = quality_manager.findQualityByQualityType(quality_type, global_machine_definition, [material])
-            if not quality: #No quality profile found for this quality type.
+
+            if not quality:
+                # No quality profile found for this quality type.
                 quality = self._empty_quality_container
 
-            result.append({"stack": stack, "quality": quality, "quality_changes": quality_changes})
+            result.append({
+                "stack": extruder_stack,
+                "quality": quality,
+                "quality_changes": quality_changes
+            })
 
-        if extruder_stacks:
+        # append the global quality changes
         global_quality = quality_manager.findQualityByQualityType(quality_type, global_machine_definition, [material], global_quality = "True")
+
+        # if there is not global quality but we're using a single extrusion machine, copy the quality of the first extruder - CURA-4482
+        if not global_quality and len(extruder_stacks) == 1:
+            global_quality = result[0]["quality"]
+
+        # if still no global quality changes are found we set it to empty (not supported)
         if not global_quality:
             global_quality = self._empty_quality_container
-            result.append({"stack": global_container_stack, "quality": global_quality, "quality_changes": global_quality_changes})
+
-        else:
+        result.append({
-            result.append({"stack": global_container_stack, "quality": global_quality, "quality_changes": global_quality_changes})
+            "stack": global_container_stack,
+            "quality": global_quality,
+            "quality_changes": global_quality_changes
+        })
 
         return result
 
@@ -982,9 +1055,6 @@ class MachineManager(QObject):
             stack.qualityChanges.nameChanged.connect(self._onQualityNameChanged)
         self._onQualityNameChanged()
 
-    def _askUserToKeepOrClearCurrentSettings(self):
-        Application.getInstance().discardOrKeepProfileChanges()
-
     @pyqtProperty(str, notify = activeVariantChanged)
     def activeVariantName(self) -> str:
         if self._active_container_stack:
@@ -1075,10 +1145,11 @@ class MachineManager(QObject):
 
     @pyqtSlot(str, str)
     def renameMachine(self, machine_id: str, new_name: str):
-        containers = ContainerRegistry.getInstance().findContainerStacks(id = machine_id)
+        container_registry = ContainerRegistry.getInstance()
-        if containers:
+        machine_stack = container_registry.findContainerStacks(id = machine_id)
-            new_name = self._createUniqueName("machine", containers[0].getName(), new_name, containers[0].getBottom().getName())
+        if machine_stack:
-            containers[0].setName(new_name)
+            new_name = container_registry.createUniqueName("machine", machine_stack[0].getName(), new_name, machine_stack[0].getBottom().getName())
+            machine_stack[0].setName(new_name)
             self.globalContainerChanged.emit()
 
     @pyqtSlot(str)
@@ -1102,15 +1173,14 @@ class MachineManager(QObject):
     @pyqtProperty(bool, notify = globalContainerChanged)
     def hasMaterials(self) -> bool:
         if self._global_container_stack:
-            return bool(self._global_container_stack.getMetaDataEntry("has_materials", False))
+            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_materials", False))
 
         return False
 
     @pyqtProperty(bool, notify = globalContainerChanged)
     def hasVariants(self) -> bool:
         if self._global_container_stack:
-            return bool(self._global_container_stack.getMetaDataEntry("has_variants", False))
+            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_variants", False))
-
         return False
 
     ##  Property to indicate if a machine has "specialized" material profiles.
@@ -1118,8 +1188,7 @@ class MachineManager(QObject):
     @pyqtProperty(bool, notify = globalContainerChanged)
     def filterMaterialsByMachine(self) -> bool:
         if self._global_container_stack:
-            return bool(self._global_container_stack.getMetaDataEntry("has_machine_materials", False))
+            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_machine_materials", False))
-
         return False
 
     ##  Property to indicate if a machine has "specialized" quality profiles.
@@ -1127,7 +1196,7 @@ class MachineManager(QObject):
     @pyqtProperty(bool, notify = globalContainerChanged)
     def filterQualityByMachine(self) -> bool:
         if self._global_container_stack:
-            return bool(self._global_container_stack.getMetaDataEntry("has_machine_quality", False))
+            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_machine_quality", False))
         return False
 
     ##  Get the Definition ID of a machine (specified by ID)
@@ -1140,7 +1209,7 @@ class MachineManager(QObject):
             return containers[0].getBottom().getId()
 
     @staticmethod
-    def createMachineManager(engine=None, script_engine=None):
+    def createMachineManager():
         return MachineManager()
 
     @deprecated("Use ExtruderStack.material = ... and it won't be necessary", "2.7")

cura/Settings/MaterialsModel.py

@@ -19,3 +19,7 @@ class MaterialsModel(InstanceContainersModel):
     def _onContainerMetaDataChanged(self, container):
         if container.getMetaDataEntry("type") == "material": #Only need to update if a material was changed.
             self._update()
+
+    def _onContainerChanged(self, container):
+        if container.getMetaDataEntry("type", "") == "material":
+            super()._onContainerChanged(container)

cura/Settings/ProfilesModel.py

@@ -12,6 +12,11 @@ from UM.Settings.Models.InstanceContainersModel import InstanceContainersModel
 from cura.QualityManager import QualityManager
 from cura.Settings.ExtruderManager import ExtruderManager
 
+from typing import List, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from cura.Settings.ExtruderStack import ExtruderStack
+
 
 ##  QML Model for listing the current list of valid quality profiles.
 #
@@ -27,7 +32,6 @@ class ProfilesModel(InstanceContainersModel):
         self.addRoleName(self.AvailableRole, "available")
 
         Application.getInstance().globalContainerStackChanged.connect(self._update)
-
         Application.getInstance().getMachineManager().activeVariantChanged.connect(self._update)
         Application.getInstance().getMachineManager().activeStackChanged.connect(self._update)
         Application.getInstance().getMachineManager().activeMaterialChanged.connect(self._update)
@@ -54,16 +58,10 @@ class ProfilesModel(InstanceContainersModel):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack is None:
             return {}, {}
-        global_stack_definition = global_container_stack.getBottom()
+        global_stack_definition = global_container_stack.definition
 
         # Get the list of extruders and place the selected extruder at the front of the list.
-        extruder_manager = ExtruderManager.getInstance()
+        extruder_stacks = self._getOrderedExtruderStacksList()
-        active_extruder = extruder_manager.getActiveExtruderStack()
-        extruder_stacks = extruder_manager.getActiveExtruderStacks()
-        materials = [global_container_stack.material]
-        if active_extruder in extruder_stacks:
-            extruder_stacks.remove(active_extruder)
-            extruder_stacks = [active_extruder] + extruder_stacks
         materials = [extruder.material for extruder in extruder_stacks]
 
         # Fetch the list of usable qualities across all extruders.
@@ -83,39 +81,27 @@ class ProfilesModel(InstanceContainersModel):
             if quality.getMetaDataEntry("quality_type") not in quality_type_set:
                 result.append(quality)
 
+        # if still profiles are found, add a single empty_quality ("Not supported") instance to the drop down list
+        if len(result) == 0:
+            # If not qualities are found we dynamically create a not supported container for this machine + material combination
+            not_supported_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality")[0]
+            result.append(not_supported_container)
+
         return {item.getId():item for item in result}, {}
 
     ##  Re-computes the items in this model, and adds the layer height role.
     def _recomputeItems(self):
+
         # Some globals that we can re-use.
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack is None:
             return
 
-        # Detecting if the machine has multiple extrusion
+        extruder_stacks = self._getOrderedExtruderStacksList()
-        multiple_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
+        container_registry = ContainerRegistry.getInstance()
-        # Get the list of extruders and place the selected extruder at the front of the list.
-        extruder_manager = ExtruderManager.getInstance()
-        active_extruder = extruder_manager.getActiveExtruderStack()
-        extruder_stacks = extruder_manager.getActiveExtruderStacks()
-        if multiple_extrusion:
-            # Place the active extruder at the front of the list.
-            # This is a workaround checking if there is an active_extruder or not before moving it to the front of the list.
-            # Actually, when a printer has multiple extruders, should exist always an active_extruder. However, in some
-            # cases the active_extruder is still None.
-            if active_extruder in extruder_stacks:
-                extruder_stacks.remove(active_extruder)
-            new_extruder_stacks = []
-            if active_extruder is not None:
-                new_extruder_stacks = [active_extruder]
-            extruder_stacks = new_extruder_stacks + extruder_stacks
 
         # Get a list of usable/available qualities for this machine and material
-        qualities = QualityManager.getInstance().findAllUsableQualitiesForMachineAndExtruders(global_container_stack,
+        qualities = QualityManager.getInstance().findAllUsableQualitiesForMachineAndExtruders(global_container_stack, extruder_stacks)
-                                                                                              extruder_stacks)
-
-        container_registry = ContainerRegistry.getInstance()
-        machine_manager = Application.getInstance().getMachineManager()
 
         unit = global_container_stack.getBottom().getProperty("layer_height", "unit")
         if not unit:
@@ -160,13 +146,23 @@ class ProfilesModel(InstanceContainersModel):
         # Now all the containers are set
         for item in containers:
             profile = container_registry.findContainers(id = item["id"])
+
+            # When for some reason there is no profile container in the registry
             if not profile:
-                self._setItemLayerHeight(item, "", unit)
+                self._setItemLayerHeight(item, "", "")
                 item["available"] = False
                 yield item
                 continue
 
             profile = profile[0]
+
+            # When there is a profile but it's an empty quality should. It's shown in the list (they are "Not Supported" profiles)
+            if profile.getId() == "empty_quality":
+                self._setItemLayerHeight(item, "", "")
+                item["available"] = True
+                yield item
+                continue
+
             item["available"] = profile in qualities
 
             # Easy case: This profile defines its own layer height.
@@ -175,6 +171,8 @@ class ProfilesModel(InstanceContainersModel):
                 yield item
                 continue
 
+            machine_manager = Application.getInstance().getMachineManager()
+
             # Quality-changes profile that has no value for layer height. Get the corresponding quality profile and ask that profile.
             quality_type = profile.getMetaDataEntry("quality_type", None)
             if quality_type:
@@ -183,9 +181,11 @@ class ProfilesModel(InstanceContainersModel):
                     if quality_result["stack"] is global_container_stack:
                         quality = quality_result["quality"]
                         break
-                else: #No global container stack in the results:
+                else:
+                    # No global container stack in the results:
                     if quality_results:
-                        quality = quality_results[0]["quality"] #Take any of the extruders.
+                        # Take any of the extruders.
+                        quality = quality_results[0]["quality"]
                     else:
                         quality = None
                 if quality and quality.hasProperty("layer_height", "value"):
@@ -202,6 +202,20 @@ class ProfilesModel(InstanceContainersModel):
             self._setItemLayerHeight(item, global_container_stack.getRawProperty("layer_height", "value", skip_until_container = skip_until_container.getId()), unit)  # Fall through to the currently loaded material.
             yield item
 
-    def _setItemLayerHeight(self, item, value, unit):
+    ## Get a list of extruder stacks with the active extruder at the front of the list.
+    @staticmethod
+    def _getOrderedExtruderStacksList() -> List["ExtruderStack"]:
+        extruder_manager = ExtruderManager.getInstance()
+        extruder_stacks = extruder_manager.getActiveExtruderStacks()
+        active_extruder = extruder_manager.getActiveExtruderStack()
+
+        if active_extruder in extruder_stacks:
+            extruder_stacks.remove(active_extruder)
+            extruder_stacks = [active_extruder] + extruder_stacks
+
+        return extruder_stacks
+
+    @staticmethod
+    def _setItemLayerHeight(item, value, unit):
         item["layer_height"] = str(value) + unit
         item["layer_height_without_unit"] = str(value)

cura/Settings/QualityAndUserProfilesModel.py

@@ -22,49 +22,22 @@ class QualityAndUserProfilesModel(ProfilesModel):
 
         # Fetch the list of quality changes.
         quality_manager = QualityManager.getInstance()
-        machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.getBottom())
+        machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.definition)
         quality_changes_list = quality_manager.findAllQualityChangesForMachine(machine_definition)
 
-        # Detecting if the machine has multiple extrusion
-        multiple_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
-        # Get the  list of extruders
         extruder_manager = ExtruderManager.getInstance()
         active_extruder = extruder_manager.getActiveExtruderStack()
-        extruder_stacks = extruder_manager.getActiveExtruderStacks()
+        extruder_stacks = self._getOrderedExtruderStacksList()
-        if multiple_extrusion:
-            # Place the active extruder at the front of the list.
-            # This is a workaround checking if there is an active_extruder or not before moving it to the front of the list.
-            # Actually, when a printer has multiple extruders, should exist always an active_extruder. However, in some
-            # cases the active_extruder is still None.
-            if active_extruder in extruder_stacks:
-                extruder_stacks.remove(active_extruder)
-            new_extruder_stacks = []
-            if active_extruder is not None:
-                new_extruder_stacks = [active_extruder]
-            else:
-                # if there is no active extruder, use the first one in the active extruder stacks
-                active_extruder = extruder_stacks[0]
-            extruder_stacks = new_extruder_stacks + extruder_stacks
 
-        # Fetch the list of useable qualities across all extruders.
+        # Fetch the list of usable qualities across all extruders.
         # The actual list of quality profiles come from the first extruder in the extruder list.
-        quality_list = quality_manager.findAllUsableQualitiesForMachineAndExtruders(global_container_stack,
+        quality_list = quality_manager.findAllUsableQualitiesForMachineAndExtruders(global_container_stack, extruder_stacks)
-                                                                                                  extruder_stacks)
-        result = {quality.getId():quality for quality in quality_list}
 
         # Filter the quality_change by the list of available quality_types
         quality_type_set = set([x.getMetaDataEntry("quality_type") for x in quality_list])
-
+        filtered_quality_changes = {qc.getId():qc for qc in quality_changes_list if
-        if multiple_extrusion:
+                                    qc.getMetaDataEntry("quality_type") in quality_type_set and
-            # If the printer has multiple extruders then quality changes related to the current extruder are kept
-            filtered_quality_changes = {qc.getId():qc for qc in quality_changes_list if qc.getMetaDataEntry("quality_type") in quality_type_set and
                                     qc.getMetaDataEntry("extruder") is not None and
                                     (qc.getMetaDataEntry("extruder") == active_extruder.definition.getMetaDataEntry("quality_definition") or
                                      qc.getMetaDataEntry("extruder") == active_extruder.definition.getId())}
-        else:
+        return filtered_quality_changes, {}
-            # If not, the quality changes of the global stack are selected
-            filtered_quality_changes = {qc.getId():qc for qc in quality_changes_list if qc.getMetaDataEntry("quality_type") in quality_type_set and
-                                        qc.getMetaDataEntry("extruder") is None}
-        result.update(filtered_quality_changes)
-
-        return result, {}

cura/Settings/QualitySettingsModel.py

@@ -223,7 +223,6 @@ class QualitySettingsModel(UM.Qt.ListModel.ListModel):
                 if self._extruder_id == "" and settable_per_extruder:
                     continue
 
-
             label = definition.label
             if self._i18n_catalog:
                 label = self._i18n_catalog.i18nc(definition.key + " label", label)

cura/Settings/SettingInheritanceManager.py

@@ -47,21 +47,20 @@ class SettingInheritanceManager(QObject):
 
     @pyqtSlot(str, str, result = "QStringList")
     def getOverridesForExtruder(self, key, extruder_index):
-        multi_extrusion = self._global_container_stack.getProperty("machine_extruder_count", "value") > 1
+        result = []
-        if not multi_extrusion:
+
-            return self._settings_with_inheritance_warning
+        extruder_stack = ExtruderManager.getInstance().getExtruderStack(extruder_index)
-        extruder = ExtruderManager.getInstance().getExtruderStack(extruder_index)
+        if not extruder_stack:
-        if not extruder:
             Logger.log("w", "Unable to find extruder for current machine with index %s", extruder_index)
-            return []
+            return result
 
         definitions = self._global_container_stack.definition.findDefinitions(key = key)
         if not definitions:
             Logger.log("w", "Could not find definition for key [%s] (2)", key)
-            return []
+            return result
-        result = []
+
         for key in definitions[0].getAllKeys():
-            if self._settingIsOverwritingInheritance(key, extruder):
+            if self._settingIsOverwritingInheritance(key, extruder_stack):
                 result.append(key)
 
         return result
@@ -78,8 +77,8 @@ class SettingInheritanceManager(QObject):
 
     def _onActiveExtruderChanged(self):
         new_active_stack = ExtruderManager.getInstance().getActiveExtruderStack()
-        if not new_active_stack:
+        # if not new_active_stack:
-            new_active_stack = self._global_container_stack
+        #     new_active_stack = self._global_container_stack
 
         if new_active_stack != self._active_container_stack:  # Check if changed
             if self._active_container_stack:  # Disconnect signal from old container (if any)

cura/Settings/SettingOverrideDecorator.py

@@ -27,11 +27,7 @@ class SettingOverrideDecorator(SceneNodeDecorator):
         self._stack = PerObjectContainerStack(stack_id = id(self))
         self._stack.setDirty(False)  # This stack does not need to be saved.
         self._stack.addContainer(InstanceContainer(container_id = "SettingOverrideInstanceContainer"))
-
-        if ExtruderManager.getInstance().extruderCount > 1:
         self._extruder_stack = ExtruderManager.getInstance().getExtruderStack(0).getId()
-        else:
-            self._extruder_stack = None
 
         self._stack.propertyChanged.connect(self._onSettingChanged)
 

cura/Settings/SimpleModeSettingsManager.py

@@ -12,11 +12,18 @@ class SimpleModeSettingsManager(QObject):
         super().__init__(parent)
 
         self._machine_manager = Application.getInstance().getMachineManager()
-        self._is_profile_customized = False
+        self._is_profile_customized = False  # True when default profile has user changes
+        self._is_profile_user_created = False  # True when profile was custom created by user
 
         self._machine_manager.activeStackValueChanged.connect(self._updateIsProfileCustomized)
+        self._machine_manager.activeQualityChanged.connect(self._updateIsProfileUserCreated)
+
+        # update on create as the activeQualityChanged signal is emitted before this manager is created when Cura starts
+        self._updateIsProfileCustomized()
+        self._updateIsProfileUserCreated()
 
     isProfileCustomizedChanged = pyqtSignal()
+    isProfileUserCreatedChanged = pyqtSignal()
 
     @pyqtProperty(bool, notify = isProfileCustomizedChanged)
     def isProfileCustomized(self):
@@ -32,11 +39,13 @@ class SimpleModeSettingsManager(QObject):
 
         # check user settings in the global stack
         user_setting_keys.update(set(global_stack.userChanges.getAllKeys()))
+
         # check user settings in the extruder stacks
         if global_stack.extruders:
             for extruder_stack in global_stack.extruders.values():
                 user_setting_keys.update(set(extruder_stack.userChanges.getAllKeys()))
 
+        # remove settings that are visible in recommended (we don't show the reset button for those)
         for skip_key in self.__ignored_custom_setting_keys:
             if skip_key in user_setting_keys:
                 user_setting_keys.remove(skip_key)
@@ -47,6 +56,33 @@ class SimpleModeSettingsManager(QObject):
             self._is_profile_customized = has_customized_user_settings
             self.isProfileCustomizedChanged.emit()
 
+    @pyqtProperty(bool, notify = isProfileUserCreatedChanged)
+    def isProfileUserCreated(self):
+        return self._is_profile_user_created
+
+    def _updateIsProfileUserCreated(self):
+        quality_changes_keys = set()
+
+        if not self._machine_manager.activeMachine:
+            return False
+
+        global_stack = self._machine_manager.activeMachine
+
+        # check quality changes settings in the global stack
+        quality_changes_keys.update(set(global_stack.qualityChanges.getAllKeys()))
+
+        # check quality changes settings in the extruder stacks
+        if global_stack.extruders:
+            for extruder_stack in global_stack.extruders.values():
+                quality_changes_keys.update(set(extruder_stack.qualityChanges.getAllKeys()))
+
+        # check if the qualityChanges container is not empty (meaning it is a user created profile)
+        has_quality_changes = len(quality_changes_keys) > 0
+
+        if has_quality_changes != self._is_profile_user_created:
+            self._is_profile_user_created = has_quality_changes
+            self.isProfileUserCreatedChanged.emit()
+
     # These are the settings included in the Simple ("Recommended") Mode, so only when the other settings have been
     # changed, we consider it as a user customized profile in the Simple ("Recommended") Mode.
     __ignored_custom_setting_keys = ["support_enable",

cura/Settings/UserProfilesModel.py

@@ -22,47 +22,24 @@ class UserProfilesModel(ProfilesModel):
 
         # Fetch the list of quality changes.
         quality_manager = QualityManager.getInstance()
-        machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.getBottom())
+        machine_definition = quality_manager.getParentMachineDefinition(global_container_stack.definition)
         quality_changes_list = quality_manager.findAllQualityChangesForMachine(machine_definition)
 
-        # Detecting if the machine has multiple extrusion
-        multiple_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
-        # Get the list of extruders and place the selected extruder at the front of the list.
         extruder_manager = ExtruderManager.getInstance()
         active_extruder = extruder_manager.getActiveExtruderStack()
-        extruder_stacks = extruder_manager.getActiveExtruderStacks()
+        extruder_stacks = self._getOrderedExtruderStacksList()
-        if multiple_extrusion:
-            # Place the active extruder at the front of the list.
-            # This is a workaround checking if there is an active_extruder or not before moving it to the front of the list.
-            # Actually, when a printer has multiple extruders, should exist always an active_extruder. However, in some
-            # cases the active_extruder is still None.
-            if active_extruder in extruder_stacks:
-                extruder_stacks.remove(active_extruder)
-            new_extruder_stacks = []
-            if active_extruder is not None:
-                new_extruder_stacks = [active_extruder]
-            else:
-                # if there is no active extruder, use the first one in the active extruder stacks
-                active_extruder = extruder_stacks[0]
-            extruder_stacks = new_extruder_stacks + extruder_stacks
 
-        # Fetch the list of useable qualities across all extruders.
+        # Fetch the list of usable qualities across all extruders.
         # The actual list of quality profiles come from the first extruder in the extruder list.
-        quality_list = quality_manager.findAllUsableQualitiesForMachineAndExtruders(global_container_stack,
+        quality_list = quality_manager.findAllUsableQualitiesForMachineAndExtruders(global_container_stack, extruder_stacks)
-                                                                                    extruder_stacks)
 
         # Filter the quality_change by the list of available quality_types
         quality_type_set = set([x.getMetaDataEntry("quality_type") for x in quality_list])
 
-        if multiple_extrusion:
+        filtered_quality_changes = {qc.getId():qc for qc in quality_changes_list if
-            # If the printer has multiple extruders then quality changes related to the current extruder are kept
+                                    qc.getMetaDataEntry("quality_type") in quality_type_set and
-            filtered_quality_changes = {qc.getId():qc for qc in quality_changes_list if qc.getMetaDataEntry("quality_type") in quality_type_set and
                                     qc.getMetaDataEntry("extruder") is not None and
                                     (qc.getMetaDataEntry("extruder") == active_extruder.definition.getMetaDataEntry("quality_definition") or
                                      qc.getMetaDataEntry("extruder") == active_extruder.definition.getId())}
-        else:
-            # If not, the quality changes of the global stack are selected
-            filtered_quality_changes = {qc.getId():qc for qc in quality_changes_list if qc.getMetaDataEntry("quality_type") in quality_type_set and
-                                        qc.getMetaDataEntry("extruder") is None}
 
         return filtered_quality_changes, {}

plugins/3MFReader/ThreeMFReader.py

@@ -107,20 +107,13 @@ class ThreeMFReader(MeshReader):
             um_node.addDecorator(SettingOverrideDecorator())
 
             global_container_stack = Application.getInstance().getGlobalContainerStack()
+
             # Ensure the correct next container for the SettingOverride decorator is set.
             if global_container_stack:
-                multi_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
-
-                # Ensure that all extruder data is reset
-                if not multi_extrusion:
-                    default_stack_id = global_container_stack.getId()
-                else:
                 default_stack = ExtruderManager.getInstance().getExtruderStack(0)
+
                 if default_stack:
-                        default_stack_id = default_stack.getId()
+                    um_node.callDecoration("setActiveExtruder", default_stack.getId())
-                    else:
-                        default_stack_id = global_container_stack.getId()
-                um_node.callDecoration("setActiveExtruder", default_stack_id)
 
                 # Get the definition & set it
                 definition = QualityManager.getInstance().getParentMachineDefinition(global_container_stack.getBottom())

plugins/3MFReader/ThreeMFWorkspaceReader.py

@@ -13,6 +13,7 @@ from UM.Settings.ContainerRegistry import ContainerRegistry
 from UM.MimeTypeDatabase import MimeTypeDatabase
 from UM.Job import Job
 from UM.Preferences import Preferences
+from UM.Util import parseBool
 from .WorkspaceDialog import WorkspaceDialog
 
 import xml.etree.ElementTree as ET
@@ -21,6 +22,8 @@ from cura.Settings.CuraStackBuilder import CuraStackBuilder
 from cura.Settings.ExtruderManager import ExtruderManager
 from cura.Settings.ExtruderStack import ExtruderStack
 from cura.Settings.GlobalStack import GlobalStack
+from cura.Settings.CuraContainerStack import _ContainerIndexes
+from cura.QualityManager import QualityManager
 
 from configparser import ConfigParser
 import zipfile
@@ -147,7 +150,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
 
             if not definitions:
                 definition_container = DefinitionContainer(container_id)
-                definition_container.deserialize(archive.open(each_definition_container_file).read().decode("utf-8"))
+                definition_container.deserialize(archive.open(each_definition_container_file).read().decode("utf-8"), file_name = each_definition_container_file)
                 definition_container = definition_container.getMetaData()
 
             else:
@@ -202,7 +205,8 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             instance_container = InstanceContainer(container_id)
 
             # Deserialize InstanceContainer by converting read data from bytes to string
-            instance_container.deserialize(archive.open(each_instance_container_file).read().decode("utf-8"))
+            instance_container.deserialize(archive.open(each_instance_container_file).read().decode("utf-8"),
+                                           file_name = each_instance_container_file)
             instance_container_list.append(instance_container)
 
             container_type = instance_container.getMetaDataEntry("type")
@@ -372,7 +376,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
         return WorkspaceReader.PreReadResult.accepted
 
     ## Overrides an ExtruderStack in the given GlobalStack and returns the new ExtruderStack.
-    def _overrideExtruderStack(self, global_stack, extruder_file_content):
+    def _overrideExtruderStack(self, global_stack, extruder_file_content, extruder_stack_file):
         # Get extruder position first
         extruder_config = configparser.ConfigParser()
         extruder_config.read_string(extruder_file_content)
@@ -388,7 +392,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             return None
 
         # Override the given extruder stack
-        extruder_stack.deserialize(extruder_file_content)
+        extruder_stack.deserialize(extruder_file_content, file_name = extruder_stack_file)
 
         # return the new ExtruderStack
         return extruder_stack
@@ -478,7 +482,8 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             definitions = self._container_registry.findDefinitionContainersMetadata(id = container_id)
             if not definitions:
                 definition_container = DefinitionContainer(container_id)
-                definition_container.deserialize(archive.open(definition_container_file).read().decode("utf-8"))
+                definition_container.deserialize(archive.open(definition_container_file).read().decode("utf-8"),
+                                                 file_name = definition_container_file)
                 self._container_registry.addContainer(definition_container)
             Job.yieldThread()
 
@@ -496,18 +501,21 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
 
                 if not materials:
                     material_container = xml_material_profile(container_id)
-                    material_container.deserialize(archive.open(material_container_file).read().decode("utf-8"))
+                    material_container.deserialize(archive.open(material_container_file).read().decode("utf-8"),
+                                                   file_name = material_container_file)
                     containers_to_add.append(material_container)
                 else:
                     material_container = materials[0]
                     if not self._container_registry.isReadOnly(container_id):  # Only create new materials if they are not read only.
                         if self._resolve_strategies["material"] == "override":
-                            material_container.deserialize(archive.open(material_container_file).read().decode("utf-8"))
+                            material_container.deserialize(archive.open(material_container_file).read().decode("utf-8"),
+                                                           file_name = material_container_file)
                         elif self._resolve_strategies["material"] == "new":
                             # Note that we *must* deserialize it with a new ID, as multiple containers will be
                             # auto created & added.
                             material_container = xml_material_profile(self.getNewId(container_id))
-                            material_container.deserialize(archive.open(material_container_file).read().decode("utf-8"))
+                            material_container.deserialize(archive.open(material_container_file).read().decode("utf-8"),
+                                                           file_name = material_container_file)
                             containers_to_add.append(material_container)
 
                 material_containers.append(material_container)
@@ -534,7 +542,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             instance_container = InstanceContainer(container_id)
 
             # Deserialize InstanceContainer by converting read data from bytes to string
-            instance_container.deserialize(serialized)
+            instance_container.deserialize(serialized, file_name = instance_container_file)
             container_type = instance_container.getMetaDataEntry("type")
             Job.yieldThread()
 
@@ -556,7 +564,8 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 else:
                     if self._resolve_strategies["machine"] == "override" or self._resolve_strategies["machine"] is None:
                         instance_container = user_containers[0]
-                        instance_container.deserialize(archive.open(instance_container_file).read().decode("utf-8"))
+                        instance_container.deserialize(archive.open(instance_container_file).read().decode("utf-8"),
+                                                       file_name = instance_container_file)
                         instance_container.setDirty(True)
                     elif self._resolve_strategies["machine"] == "new":
                         # The machine is going to get a spiffy new name, so ensure that the id's of user settings match.
@@ -589,7 +598,8 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                     # selected strategy.
                     if self._resolve_strategies[container_type] == "override":
                         instance_container = changes_containers[0]
-                        instance_container.deserialize(archive.open(instance_container_file).read().decode("utf-8"))
+                        instance_container.deserialize(archive.open(instance_container_file).read().decode("utf-8"),
+                                                       file_name = instance_container_file)
                         instance_container.setDirty(True)
 
                     elif self._resolve_strategies[container_type] == "new":
@@ -638,9 +648,10 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
         # Get the stack(s) saved in the workspace.
         Logger.log("d", "Workspace loading is checking stacks containers...")
 
-        # --
         # load global stack file
         try:
+            stack = None
+
             if self._resolve_strategies["machine"] == "override":
                 container_stacks = self._container_registry.findContainerStacks(id = global_stack_id_original)
                 stack = container_stacks[0]
@@ -649,7 +660,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 # There is a machine, check if it has authentication data. If so, keep that data.
                 network_authentication_id = stack.getMetaDataEntry("network_authentication_id")
                 network_authentication_key = stack.getMetaDataEntry("network_authentication_key")
-                stack.deserialize(archive.open(global_stack_file).read().decode("utf-8"))
+                stack.deserialize(archive.open(global_stack_file).read().decode("utf-8"), file_name = global_stack_file)
                 if network_authentication_id:
                     stack.addMetaDataEntry("network_authentication_id", network_authentication_id)
                 if network_authentication_key:
@@ -659,7 +670,8 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 # create a new global stack
                 stack = GlobalStack(global_stack_id_new)
                 # Deserialize stack by converting read data from bytes to string
-                stack.deserialize(archive.open(global_stack_file).read().decode("utf-8"))
+                stack.deserialize(archive.open(global_stack_file).read().decode("utf-8"),
+                                  file_name = global_stack_file)
 
                 # Ensure a unique ID and name
                 stack._id = global_stack_id_new
@@ -676,12 +688,11 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 self._container_registry.addContainer(stack)
                 containers_added.append(stack)
             else:
-                Logger.log("e", "Resolve strategy of %s for machine is not supported",
+                Logger.log("e", "Resolve strategy of %s for machine is not supported", self._resolve_strategies["machine"])
-                           self._resolve_strategies["machine"])
 
             # Create a new definition_changes container if it was empty
             if stack.definitionChanges == self._container_registry.getEmptyInstanceContainer():
-                stack.setDefinitionChanges(CuraStackBuilder.createDefinitionChangesContainer(stack, stack._id + "_settings"))
+                stack.setDefinitionChanges(CuraStackBuilder.createDefinitionChangesContainer(stack, stack.getId() + "_settings"))
             global_stack = stack
             Job.yieldThread()
         except:
@@ -691,16 +702,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 self._container_registry.removeContainer(container.getId())
             return
 
-        #
-        # Use the number of extruders from the global stack instead of the number of extruder stacks this project file
-        # contains. The Custom FDM Printer can have multiple extruders, but the actual number of extruders in used is
-        # defined in the global stack.
-        # Because for single-extrusion machines, there won't be an extruder stack, so relying on the the extruder count
-        # in the global stack can avoid problems in those cases.
-        #
-        extruder_count_from_global_stack = global_stack.getProperty("machine_extruder_count", "value")
-
-        # --
         # load extruder stack files
         try:
             for extruder_stack_file in extruder_stack_files:
@@ -708,9 +709,8 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 extruder_file_content = archive.open(extruder_stack_file, "r").read().decode("utf-8")
 
                 if self._resolve_strategies["machine"] == "override":
-                    if global_stack.getProperty("machine_extruder_count", "value") > 1:
                     # deserialize new extruder stack over the current ones (if any)
-                        stack = self._overrideExtruderStack(global_stack, extruder_file_content)
+                    stack = self._overrideExtruderStack(global_stack, extruder_file_content, extruder_stack_file)
                     if stack is None:
                         continue
 
@@ -730,7 +730,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                     extruder_config.write(tmp_string_io)
                     extruder_file_content = tmp_string_io.getvalue()
 
-                    stack.deserialize(extruder_file_content)
+                    stack.deserialize(extruder_file_content, file_name = extruder_stack_file)
 
                     # Ensure a unique ID and name
                     stack._id = new_id
@@ -743,9 +743,26 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
 
                 # Create a new definition_changes container if it was empty
                 if stack.definitionChanges == self._container_registry.getEmptyInstanceContainer():
-                    stack.setDefinitionChanges(CuraStackBuilder.createDefinitionChangesContainer(stack, stack._id + "_settings"))
+                    stack.setDefinitionChanges(CuraStackBuilder.createDefinitionChangesContainer(stack, stack.getId() + "_settings"))
-                if global_stack.getProperty("machine_extruder_count", "value") > 1:
+
+                if stack.getMetaDataEntry("type") == "extruder_train":
                     extruder_stacks.append(stack)
+
+            # If not extruder stacks were saved in the project file (pre 3.1) create one manually
+            # We re-use the container registry's addExtruderStackForSingleExtrusionMachine method for this
+            if not extruder_stacks:
+                stack = self._container_registry.addExtruderStackForSingleExtrusionMachine(global_stack, "fdmextruder")
+                if stack:
+                    if self._resolve_strategies["machine"] == "override":
+                        # in case the extruder is newly created (for a single-extrusion machine), we need to override
+                        # the existing extruder stack.
+                        existing_extruder_stack = global_stack.extruders[stack.getMetaDataEntry("position")]
+                        for idx in range(len(_ContainerIndexes.IndexTypeMap)):
+                            existing_extruder_stack.replaceContainer(idx, stack._containers[idx], postpone_emit = True)
+                        extruder_stacks.append(existing_extruder_stack)
+                    else:
+                        extruder_stacks.append(stack)
+
         except:
             Logger.logException("w", "We failed to serialize the stack. Trying to clean up.")
             # Something went really wrong. Try to remove any data that we added.
@@ -753,13 +770,117 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 self._container_registry.removeContainer(container.getId())
             return
 
+
+        # Check quality profiles to make sure that if one stack has the "not supported" quality profile,
+        # all others should have the same.
         #
+        # This block code tries to fix the following problems in Cura 3.0 and earlier:
+        #  1. The upgrade script can rename all "Not Supported" quality profiles to "empty_quality", but it cannot fix
+        #     the problem that the global stack the extruder stacks may have different quality profiles. The code
+        #     below loops over all stacks and make sure that if there is one stack with "Not Supported" profile, the
+        #     rest should also use the "Not Supported" profile.
+        #  2. In earlier versions (at least 2.7 and 3.0), a wrong quality profile could be assigned to a stack. For
+        #     example, a UM3 can have a BB 0.8 variant with "aa04_pla_fast" quality profile enabled. To fix this,
+        #     in the code below we also check the actual available quality profiles for the machine.
+        #
+        has_not_supported = False
+        for stack in [global_stack] + extruder_stacks:
+            if stack.quality.getId() in ("empty", "empty_quality"):
+                has_not_supported = True
+                break
+        available_quality = QualityManager.getInstance().findAllUsableQualitiesForMachineAndExtruders(global_stack,
+                                                                                                      extruder_stacks)
+        if not has_not_supported:
+            has_not_supported = not available_quality
+
+        quality_has_been_changed = False
+
+        if has_not_supported:
+            empty_quality_container = self._container_registry.findInstanceContainers(id = "empty_quality")[0]
+            for stack in [global_stack] + extruder_stacks:
+                stack.replaceContainer(_ContainerIndexes.Quality, empty_quality_container)
+            empty_quality_changes_container = self._container_registry.findInstanceContainers(id = "empty_quality_changes")[0]
+            for stack in [global_stack] + extruder_stacks:
+                stack.replaceContainer(_ContainerIndexes.QualityChanges, empty_quality_changes_container)
+            quality_has_been_changed = True
+
+        else:
+            empty_quality_changes_container = self._container_registry.findInstanceContainers(id="empty_quality_changes")[0]
+
+            # The machine in the project has non-empty quality and there are usable qualities for this machine.
+            # We need to check if the current quality_type is still usable for this machine, if not, then the quality
+            # will be reset to the "preferred quality" if present, otherwise "normal".
+            available_quality_types = [q.getMetaDataEntry("quality_type") for q in available_quality]
+
+            if global_stack.quality.getMetaDataEntry("quality_type") not in available_quality_types:
+                # We are here because the quality_type specified in the project is not supported any more,
+                # so we need to switch it to the "preferred quality" if present, otherwise "normal".
+                quality_has_been_changed = True
+
+                # find the preferred quality
+                preferred_quality_id = global_stack.getMetaDataEntry("preferred_quality", None)
+                if preferred_quality_id is not None:
+                    definition_id = global_stack.definition.getId()
+                    definition_id = global_stack.definition.getMetaDataEntry("quality_definition", definition_id)
+                    if not parseBool(global_stack.getMetaDataEntry("has_machine_quality", "False")):
+                        definition_id = "fdmprinter"
+
+                    containers = self._container_registry.findInstanceContainers(id = preferred_quality_id,
+                                                                                 type = "quality",
+                                                                                 definition = definition_id)
+                    containers = [c for c in containers if not c.getMetaDataEntry("material", "")]
+                    if containers:
+                        global_stack.quality = containers[0]
+                        global_stack.qualityChanges = empty_quality_changes_container
+                        # also find the quality containers for the extruders
+                        for extruder_stack in extruder_stacks:
+                            search_criteria = {"id": preferred_quality_id,
+                                               "type": "quality",
+                                               "definition": definition_id}
+                            if global_stack.getMetaDataEntry("has_machine_materials") and extruder_stack.material.getId() not in ("empty", "empty_material"):
+                                search_criteria["material"] = extruder_stack.material.getId()
+                            containers = self._container_registry.findInstanceContainers(**search_criteria)
+                            if containers:
+                                extruder_stack.quality = containers[0]
+                                extruder_stack.qualityChanges = empty_quality_changes_container
+                            else:
+                                Logger.log("e", "Cannot find preferred quality for extruder [%s].", extruder_stack.getId())
+
+                    else:
+                        # we cannot find the preferred quality. THIS SHOULD NOT HAPPEN
+                        Logger.log("e", "Cannot find the preferred quality for machine [%s]", global_stack.getId())
+            else:
+                # The quality_type specified in the project file is usable, but the quality container itself may not
+                # be correct. For example, for UM2, the quality container can be "draft" while it should be "um2_draft"
+                # instead.
+                # In this code branch, we try to fix those incorrect quality containers.
+                #
+                # ***IMPORTANT***: We only do this fix for single-extrusion machines.
+                #                  We will first find the correct quality profile for the extruder, then apply the same
+                #                  quality profile for the global stack.
+                #
+                if len(extruder_stacks) == 1:
+                    extruder_stack = extruder_stacks[0]
+
+                    search_criteria = {"type": "quality",
+                                       "quality_type": global_stack.quality.getMetaDataEntry("quality_type")}
+                    search_criteria["definition"] = global_stack.definition.getId()
+                    if not parseBool(global_stack.getMetaDataEntry("has_machine_quality", "False")):
+                        search_criteria["definition"] = "fdmprinter"
+
+                    if global_stack.getMetaDataEntry("has_machine_materials") and extruder_stack.material.getId() not in ("empty", "empty_material"):
+                        search_criteria["material"] = extruder_stack.material.getId()
+                    containers = self._container_registry.findInstanceContainers(**search_criteria)
+                    if containers:
+                        new_quality_container = containers[0]
+                        extruder_stack.quality = new_quality_container
+                        global_stack.quality = new_quality_container
+
         # Replacing the old containers if resolve is "new".
         # When resolve is "new", some containers will get renamed, so all the other containers that reference to those
         # MUST get updated too.
         #
         if self._resolve_strategies["machine"] == "new":
-
             # A new machine was made, but it was serialized with the wrong user container. Fix that now.
             for container in user_instance_containers:
                 # replacing the container ID for user instance containers for the extruders
@@ -777,7 +898,11 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                         global_stack.userChanges = container
                         continue
 
-        for changes_container_type in ("quality_changes", "definition_changes"):
+        changes_container_types = ("quality_changes", "definition_changes")
+        if quality_has_been_changed:
+            # DO NOT replace quality_changes if the current quality_type is not supported
+            changes_container_types = ("definition_changes",)
+        for changes_container_type in changes_container_types:
             if self._resolve_strategies[changes_container_type] == "new":
                 # Quality changes needs to get a new ID, added to registry and to the right stacks
                 for each_changes_container in quality_and_definition_changes_instance_containers:
@@ -877,7 +1002,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
         base_file_name = os.path.basename(file_name)
         if base_file_name.endswith(".curaproject.3mf"):
             base_file_name = base_file_name[:base_file_name.rfind(".curaproject.3mf")]
-        Application.getInstance().projectFileLoaded.emit(base_file_name)
+        self.setWorkspaceName(base_file_name)
         return nodes
 
     ##  HACK: Replaces the material container in the given stack with a newly created material container.

plugins/3MFReader/WorkspaceDialog.py

@@ -256,14 +256,8 @@ class WorkspaceDialog(QObject):
         return self._result
 
     def _createViewFromQML(self):
-        path = QUrl.fromLocalFile(os.path.join(PluginRegistry.getInstance().getPluginPath("3MFReader"), self._qml_url))
+        path = os.path.join(PluginRegistry.getInstance().getPluginPath("3MFReader"), self._qml_url)
-        self._component = QQmlComponent(Application.getInstance()._engine, path)
+        self._view = Application.getInstance().createQmlComponent(path, {"manager": self})
-        self._context = QQmlContext(Application.getInstance()._engine.rootContext())
-        self._context.setContextProperty("manager", self)
-        self._view = self._component.create(self._context)
-        if self._view is None:
-            Logger.log("c", "QQmlComponent status %s", self._component.status())
-            Logger.log("c", "QQmlComponent error string %s", self._component.errorString())
 
     def show(self):
         # Emit signal so the right thread actually shows the view.

plugins/3MFWriter/ThreeMFWriter.py

@@ -87,7 +87,7 @@ class ThreeMFWriter(MeshWriter):
         if stack is not None:
             changed_setting_keys = set(stack.getTop().getAllKeys())
 
-            # Ensure that we save the extruder used for this object.
+            # Ensure that we save the extruder used for this object in a multi-extrusion setup
             if stack.getProperty("machine_extruder_count", "value") > 1:
                 changed_setting_keys.add("extruder_nr")
 

plugins/ChangeLogPlugin/ChangeLog.py

@@ -8,7 +8,6 @@ from UM.Application import Application
 from UM.PluginRegistry import PluginRegistry
 from UM.Version import Version
 
-from PyQt5.QtQuick import QQuickView
 from PyQt5.QtQml import QQmlComponent, QQmlContext
 from PyQt5.QtCore import QUrl, pyqtSlot, QObject
 
@@ -107,9 +106,5 @@ class ChangeLog(Extension, QObject,):
             self._changelog_window.hide()
 
     def createChangelogWindow(self):
-        path = QUrl.fromLocalFile(os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), "ChangeLog.qml"))
+        path = os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), "ChangeLog.qml")
-
+        self._changelog_window = Application.getInstance().createQmlComponent(path, {"manager": self})
-        component = QQmlComponent(Application.getInstance()._engine, path)
-        self._changelog_context = QQmlContext(Application.getInstance()._engine.rootContext())
-        self._changelog_context.setContextProperty("manager", self)
-        self._changelog_window = component.create(self._changelog_context)

plugins/ChangeLogPlugin/ChangeLog.txt

@@ -1,3 +1,13 @@
+[3.0.4]
+*Bug fixes
+- Fixed OpenGL issue that prevents Cura from starting.
+
+*License agreement on the first startup has been added
+
+[3.0.3]
+*Bug fixes
+- Add missing libraries for the MakePrintable plugin.
+
 [3.0.0]
 *Faster start-up
 Start-up speed has been cut in half compared to the previous version.

plugins/CuraEngineBackend/Cura.proto

@@ -61,6 +61,8 @@ message Polygon {
     Type type = 1; // Type of move
     bytes points = 2; // The points of the polygon, or two points if only a line segment (Currently only line segments are used)
     float line_width = 3; // The width of the line being laid down
+    float line_thickness = 4; // The thickness of the line being laid down
+    float line_feedrate = 5; // The feedrate of the line being laid down
 }
 
 message LayerOptimized {
@@ -82,6 +84,8 @@ message PathSegment {
     bytes points = 3; // The points defining the line segments, bytes of float[2/3] array of length N+1
     bytes line_type = 4; // Type of line segment as an unsigned char array of length 1 or N, where N is the number of line segments in this path
     bytes line_width = 5; // The widths of the line segments as bytes of a float array of length 1 or N
+    bytes line_thickness = 6; // The thickness of the line segments as bytes of a float array of length 1 or N
+    bytes line_feedrate = 7; // The feedrate of the line segments as bytes of a float array of length 1 or N
 }
 
 

plugins/CuraEngineBackend/CuraEngineBackend.py

@@ -293,7 +293,7 @@ class CuraEngineBackend(QObject, Backend):
                     error_labels.add(definitions[0].label)
 
                 error_labels = ", ".join(error_labels)
-                self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice with the current settings. The following settings have errors: {0}".format(error_labels)),
+                self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice with the current settings. The following settings have errors: {0}").format(error_labels),
                                               title = catalog.i18nc("@info:title", "Unable to slice"))
                 self._error_message.show()
                 self.backendStateChange.emit(BackendState.Error)
@@ -301,6 +301,26 @@ class CuraEngineBackend(QObject, Backend):
                 self.backendStateChange.emit(BackendState.NotStarted)
             return
 
+        elif job.getResult() == StartSliceJob.StartJobResult.ObjectSettingError:
+            errors = {}
+            for node in DepthFirstIterator(Application.getInstance().getController().getScene().getRoot()):
+                stack = node.callDecoration("getStack")
+                if not stack:
+                    continue
+                for key in stack.getErrorKeys():
+                    definition = self._global_container_stack.getBottom().findDefinitions(key = key)
+                    if not definition:
+                        Logger.log("e", "When checking settings for errors, unable to find definition for key {key} in per-object stack.".format(key = key))
+                        continue
+                    definition = definition[0]
+                    errors[key] = definition.label
+            error_labels = ", ".join(errors.values())
+            self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice due to some per-model settings. The following settings have errors on one or more models: {error_labels}").format(error_labels = error_labels),
+                                          title = catalog.i18nc("@info:title", "Unable to slice"))
+            self._error_message.show()
+            self.backendStateChange.emit(BackendState.Error)
+            return
+
         if job.getResult() == StartSliceJob.StartJobResult.BuildPlateError:
             if Application.getInstance().platformActivity:
                 self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice because the prime tower or prime position(s) are invalid."),
@@ -588,7 +608,7 @@ class CuraEngineBackend(QObject, Backend):
     def _onActiveViewChanged(self):
         if Application.getInstance().getController().getActiveView():
             view = Application.getInstance().getController().getActiveView()
-            if view.getPluginId() == "LayerView":  # If switching to layer view, we should process the layers if that hasn't been done yet.
+            if view.getPluginId() == "SimulationView":  # If switching to layer view, we should process the layers if that hasn't been done yet.
                 self._layer_view_active = True
                 # There is data and we're not slicing at the moment
                 # if we are slicing, there is no need to re-calculate the data as it will be invalid in a moment.

plugins/CuraEngineBackend/ProcessSlicedLayersJob.py

@@ -61,7 +61,7 @@ class ProcessSlicedLayersJob(Job):
 
     def run(self):
         start_time = time()
-        if Application.getInstance().getController().getActiveView().getPluginId() == "LayerView":
+        if Application.getInstance().getController().getActiveView().getPluginId() == "SimulationView":
             self._progress_message.show()
             Job.yieldThread()
             if self._abort_requested:
@@ -95,20 +95,27 @@ class ProcessSlicedLayersJob(Job):
 
         # Find the minimum layer number
         # When using a raft, the raft layers are sent as layers < 0. Instead of allowing layers < 0, we
-        # instead simply offset all other layers so the lowest layer is always 0.
+        # instead simply offset all other layers so the lowest layer is always 0. It could happens that
+        # the first raft layer has value -8 but there are just 4 raft (negative) layers.
         min_layer_number = 0
+        negative_layers = 0
         for layer in self._layers:
             if layer.id < min_layer_number:
                 min_layer_number = layer.id
+            if layer.id < 0:
+                negative_layers += 1
 
         current_layer = 0
 
         for layer in self._layers:
-            abs_layer_number = layer.id + abs(min_layer_number)
+            # Negative layers are offset by the minimum layer number, but the positive layers are just
+            # offset by the number of negative layers so there is no layer gap between raft and model
+            abs_layer_number = layer.id + abs(min_layer_number) if layer.id < 0 else layer.id + negative_layers
 
             layer_data.addLayer(abs_layer_number)
             this_layer = layer_data.getLayer(abs_layer_number)
             layer_data.setLayerHeight(abs_layer_number, layer.height)
+            layer_data.setLayerThickness(abs_layer_number, layer.thickness)
 
             for p in range(layer.repeatedMessageCount("path_segment")):
                 polygon = layer.getRepeatedMessage("path_segment", p)
@@ -127,10 +134,11 @@ class ProcessSlicedLayersJob(Job):
                 line_widths = numpy.fromstring(polygon.line_width, dtype="f4")  # Convert bytearray to numpy array
                 line_widths = line_widths.reshape((-1,1))  # We get a linear list of pairs that make up the points, so make numpy interpret them correctly.
 
-                # In the future, line_thicknesses should be given by CuraEngine as well.
+                line_thicknesses = numpy.fromstring(polygon.line_thickness, dtype="f4")  # Convert bytearray to numpy array
-                # Currently the infill layer thickness also translates to line width
+                line_thicknesses = line_thicknesses.reshape((-1,1))  # We get a linear list of pairs that make up the points, so make numpy interpret them correctly.
-                line_thicknesses = numpy.zeros(line_widths.shape, dtype="f4")
+
-                line_thicknesses[:] = layer.thickness / 1000  # from micrometer to millimeter
+                line_feedrates = numpy.fromstring(polygon.line_feedrate, dtype="f4")  # Convert bytearray to numpy array
+                line_feedrates = line_feedrates.reshape((-1,1))  # We get a linear list of pairs that make up the points, so make numpy interpret them correctly.
 
                 # Create a new 3D-array, copy the 2D points over and insert the right height.
                 # This uses manual array creation + copy rather than numpy.insert since this is
@@ -145,7 +153,7 @@ class ProcessSlicedLayersJob(Job):
                     new_points[:, 1] = points[:, 2]
                     new_points[:, 2] = -points[:, 1]
 
-                this_poly = LayerPolygon.LayerPolygon(extruder, line_types, new_points, line_widths, line_thicknesses)
+                this_poly = LayerPolygon.LayerPolygon(extruder, line_types, new_points, line_widths, line_thicknesses, line_feedrates)
                 this_poly.buildCache()
 
                 this_layer.polygons.append(this_poly)
@@ -219,7 +227,7 @@ class ProcessSlicedLayersJob(Job):
             self._progress_message.setProgress(100)
 
         view = Application.getInstance().getController().getActiveView()
-        if view.getPluginId() == "LayerView":
+        if view.getPluginId() == "SimulationView":
             view.resetLayerData()
 
         if self._progress_message:
@@ -232,7 +240,7 @@ class ProcessSlicedLayersJob(Job):
 
     def _onActiveViewChanged(self):
         if self.isRunning():
-            if Application.getInstance().getController().getActiveView().getPluginId() == "LayerView":
+            if Application.getInstance().getController().getActiveView().getPluginId() == "SimulationView":
                 if not self._progress_message:
                     self._progress_message = Message(catalog.i18nc("@info:status", "Processing Layers"), 0, False, 0, catalog.i18nc("@info:title", "Information"))
                 if self._progress_message.getProgress() != 100:
@@ -240,3 +248,4 @@ class ProcessSlicedLayersJob(Job):
             else:
                 if self._progress_message:
                     self._progress_message.hide()
+

plugins/CuraEngineBackend/StartSliceJob.py

@@ -26,6 +26,7 @@ class StartJobResult(IntEnum):
     NothingToSlice = 4
     MaterialIncompatible = 5
     BuildPlateError = 6
+    ObjectSettingError = 7 #When an error occurs in per-object settings.
 
 
 ##  Formatter class that handles token expansion in start/end gcod
@@ -105,7 +106,7 @@ class StartSliceJob(Job):
                 continue
 
             if self._checkStackForErrors(node.callDecoration("getStack")):
-                self.setResult(StartJobResult.SettingError)
+                self.setResult(StartJobResult.ObjectSettingError)
                 return
 
         with self._scene.getSceneLock():
@@ -158,13 +159,9 @@ class StartSliceJob(Job):
             self._buildGlobalSettingsMessage(stack)
             self._buildGlobalInheritsStackMessage(stack)
 
-            # Only add extruder stacks if there are multiple extruders
+            # Build messages for extruder stacks
-            # Single extruder machines only use the global stack to store setting values
-            if stack.getProperty("machine_extruder_count", "value") > 1:
             for extruder_stack in ExtruderManager.getInstance().getMachineExtruders(stack.getId()):
                 self._buildExtruderMessage(extruder_stack)
-            else:
-                self._buildExtruderMessageFromGlobalStack(stack)
 
             for group in object_groups:
                 group_message = self._slice_message.addRepeatedMessage("object_lists")
@@ -250,19 +247,6 @@ class StartSliceJob(Job):
                 setting.value = str(stack.getProperty(key, "value")).encode("utf-8")
             Job.yieldThread()
 
-    ##  Create extruder message from global stack
-    def _buildExtruderMessageFromGlobalStack(self, stack):
-        message = self._slice_message.addRepeatedMessage("extruders")
-
-        for key in stack.getAllKeys():
-            # Do not send settings that are not settable_per_extruder.
-            if not stack.getProperty(key, "settable_per_extruder"):
-                continue
-            setting = message.getMessage("settings").addRepeatedMessage("settings")
-            setting.name = key
-            setting.value = str(stack.getProperty(key, "value")).encode("utf-8")
-            Job.yieldThread()
-
     ##  Sends all global settings to the engine.
     #
     #   The settings are taken from the global stack. This does not include any

plugins/FirmwareUpdateChecker/FirmwareUpdateChecker.py

@@ -1,6 +1,9 @@
 # Copyright (c) 2017 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
+from PyQt5.QtCore import QUrl
+from PyQt5.QtGui import QDesktopServices
+
 from UM.Extension import Extension
 from UM.Preferences import Preferences
 from UM.Logger import Logger
@@ -32,6 +35,17 @@ class FirmwareUpdateChecker(Extension):
         if Preferences.getInstance().getValue("info/automatic_update_check"):
             ContainerRegistry.getInstance().containerAdded.connect(self._onContainerAdded)
 
+        self._download_url = None
+
+    ##  Callback for the message that is spawned when there is a new version.
+    def _onActionTriggered(self, message, action):
+        if action == "download":
+            if self._download_url is not None:
+                QDesktopServices.openUrl(QUrl(self._download_url))
+
+    def _onSetDownloadUrl(self, download_url):
+        self._download_url = download_url
+
     def _onContainerAdded(self, container):
         # Only take care when a new GlobalStack was added
         if isinstance(container, GlobalStack):
@@ -45,5 +59,7 @@ class FirmwareUpdateChecker(Extension):
     #   \param silent type(boolean) Suppresses messages other than "new version found" messages.
     #                               This is used when checking for a new firmware version at startup.
     def checkFirmwareVersion(self, container = None, silent = False):
-        job = FirmwareUpdateCheckerJob(container = container, silent = silent, url = self.JEDI_VERSION_URL)
+        job = FirmwareUpdateCheckerJob(container = container, silent = silent, url = self.JEDI_VERSION_URL,
+                                       callback = self._onActionTriggered,
+                                       set_download_url_callback = self._onSetDownloadUrl)
         job.start()

plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerJob.py

@@ -10,30 +10,21 @@ from UM.Job import Job
 import urllib.request
 import codecs
 
-from PyQt5.QtCore import QUrl
-from PyQt5.QtGui import QDesktopServices
-
 from UM.i18n import i18nCatalog
 i18n_catalog = i18nCatalog("cura")
 
 
 ##  This job checks if there is an update available on the provided URL.
 class FirmwareUpdateCheckerJob(Job):
-    def __init__(self, container = None, silent = False, url = None):
+    def __init__(self, container = None, silent = False, url = None, callback = None, set_download_url_callback = None):
         super().__init__()
         self._container = container
         self.silent = silent
         self._url = url
-        self._download_url = None  # If an update was found, the download_url will be set to the location of the new version.
+        self._callback = callback
-
+        self._set_download_url_callback = set_download_url_callback
-    ##  Callback for the message that is spawned when there is a new version.
-    def actionTriggered(self, message, action):
-        if action == "download":
-            if self._download_url is not None:
-                QDesktopServices.openUrl(QUrl(self._download_url))
 
     def run(self):
-        self._download_url = None  # Reset download ur.
         if not self._url:
             Logger.log("e", "Can not check for a new release. URL not set!")
             return
@@ -70,13 +61,14 @@ class FirmwareUpdateCheckerJob(Job):
                 # notify the user when no new firmware version is available.
                 if (checked_version != "") and (checked_version != current_version):
                     Logger.log("i", "SHOWING FIRMWARE UPDATE MESSAGE")
-                    message = Message(i18n_catalog.i18nc("@info Don't translate {machine_name}, since it gets replaced by a printer name!", "To ensure that your {machine_name} is equipped with the latest features it is recommended to update the firmware regularly. This can be done on the {machine_name} (when connected to the network) or via USB.").format(machine_name = machine_name),
+                    message = Message(i18n_catalog.i18nc("@info Don't translate {machine_name}, since it gets replaced by a printer name!", "New features are available for your {machine_name}! It is recommended to update the firmware on your printer.").format(machine_name = machine_name),
                                       title = i18n_catalog.i18nc("@info:title The %s gets replaced with the printer name.", "New %s firmware available") % machine_name)
-                    message.addAction("download", i18n_catalog.i18nc("@action:button", "Download"), "[no_icon]", "[no_description]")
+                    message.addAction("download", i18n_catalog.i18nc("@action:button", "How to update"), "[no_icon]", "[no_description]")
 
                     # If we do this in a cool way, the download url should be available in the JSON file
-                    self._download_url = "https://ultimaker.com/en/resources/20500-upgrade-firmware"
+                    if self._set_download_url_callback:
-                    message.actionTriggered.connect(self.actionTriggered)
+                        self._set_download_url_callback("https://ultimaker.com/en/resources/20500-upgrade-firmware")
+                    message.actionTriggered.connect(self._callback)
                     message.show()
 
         except Exception as e:

plugins/GCodeReader/GCodeReader.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2016 Aleph Objects, Inc.
+# Copyright (c) 2017 Aleph Objects, Inc.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from UM.Application import Application
@@ -40,7 +40,8 @@ class GCodeReader(MeshReader):
         self._extruder_number = 0
         self._clearValues()
         self._scene_node = None
-        self._position = namedtuple('Position', ['x', 'y', 'z', 'e'])
+        # X, Y, Z position, F feedrate and E extruder values are stored
+        self._position = namedtuple('Position', ['x', 'y', 'z', 'f', 'e'])
         self._is_layers_in_file = False  # Does the Gcode have the layers comment?
         self._extruder_offsets = {}  # Offsets for multi extruders. key is index, value is [x-offset, y-offset]
         self._current_layer_thickness = 0.2  # default
@@ -48,12 +49,16 @@ class GCodeReader(MeshReader):
         Preferences.getInstance().addPreference("gcodereader/show_caution", True)
 
     def _clearValues(self):
+        self._filament_diameter = 2.85
         self._extruder_number = 0
+        self._extrusion_length_offset = [0]
         self._layer_type = LayerPolygon.Inset0Type
         self._layer_number = 0
         self._previous_z = 0
         self._layer_data_builder = LayerDataBuilder.LayerDataBuilder()
         self._center_is_zero = False
+        self._is_absolute_positioning = True    # It can be absolute (G90) or relative (G91)
+        self._is_absolute_extrusion = True  # It can become absolute (M82, default) or relative (M83)
 
     @staticmethod
     def _getValue(line, code):
@@ -96,7 +101,7 @@ class GCodeReader(MeshReader):
     def _createPolygon(self, layer_thickness, path, extruder_offsets):
         countvalid = 0
         for point in path:
-            if point[3] > 0:
+            if point[5] > 0:
                 countvalid += 1
                 if countvalid >= 2:
                     # we know what to do now, no need to count further
@@ -114,46 +119,89 @@ class GCodeReader(MeshReader):
         line_types = numpy.empty((count - 1, 1), numpy.int32)
         line_widths = numpy.empty((count - 1, 1), numpy.float32)
         line_thicknesses = numpy.empty((count - 1, 1), numpy.float32)
-        # TODO: need to calculate actual line width based on E values
+        line_feedrates = numpy.empty((count - 1, 1), numpy.float32)
         line_widths[:, 0] = 0.35  # Just a guess
         line_thicknesses[:, 0] = layer_thickness
         points = numpy.empty((count, 3), numpy.float32)
+        extrusion_values = numpy.empty((count, 1), numpy.float32)
         i = 0
         for point in path:
             points[i, :] = [point[0] + extruder_offsets[0], point[2], -point[1] - extruder_offsets[1]]
+            extrusion_values[i] = point[4]
             if i > 0:
-                line_types[i - 1] = point[3]
+                line_feedrates[i - 1] = point[3]
-                if point[3] in [LayerPolygon.MoveCombingType, LayerPolygon.MoveRetractionType]:
+                line_types[i - 1] = point[5]
+                if point[5] in [LayerPolygon.MoveCombingType, LayerPolygon.MoveRetractionType]:
                     line_widths[i - 1] = 0.1
+                    line_thicknesses[i - 1] = 0.0 # Travels are set as zero thickness lines
+                else:
+                    line_widths[i - 1] = self._calculateLineWidth(points[i], points[i-1], extrusion_values[i], extrusion_values[i-1], layer_thickness)
             i += 1
 
-        this_poly = LayerPolygon(self._extruder_number, line_types, points, line_widths, line_thicknesses)
+        this_poly = LayerPolygon(self._extruder_number, line_types, points, line_widths, line_thicknesses, line_feedrates)
         this_poly.buildCache()
 
         this_layer.polygons.append(this_poly)
         return True
 
+    def _createEmptyLayer(self, layer_number):
+        self._layer_data_builder.addLayer(layer_number)
+        self._layer_data_builder.setLayerHeight(layer_number, 0)
+        self._layer_data_builder.setLayerThickness(layer_number, 0)
+
+    def _calculateLineWidth(self, current_point, previous_point, current_extrusion, previous_extrusion, layer_thickness):
+        # Area of the filament
+        Af = (self._filament_diameter / 2) ** 2 * numpy.pi
+        # Length of the extruded filament
+        de = current_extrusion - previous_extrusion
+        # Volumne of the extruded filament
+        dVe = de * Af
+        # Length of the printed line
+        dX = numpy.sqrt((current_point[0] - previous_point[0])**2 + (current_point[2] - previous_point[2])**2)
+        # When the extruder recovers from a retraction, we get zero distance
+        if dX == 0:
+            return 0.1
+        # Area of the printed line. This area is a rectangle
+        Ae = dVe / dX
+        # This area is a rectangle with area equal to layer_thickness * layer_width
+        line_width = Ae / layer_thickness
+
+        # A threshold is set to avoid weird paths in the GCode
+        if line_width > 1.2:
+            return 0.35
+        return line_width
+
     def _gCode0(self, position, params, path):
-        x, y, z, e = position
+        x, y, z, f, e = position
+
+        if self._is_absolute_positioning:
             x = params.x if params.x is not None else x
             y = params.y if params.y is not None else y
-        z = params.z if params.z is not None else position.z
+            z = params.z if params.z is not None else z
+        else:
+            x += params.x if params.x is not None else 0
+            y += params.y if params.y is not None else 0
+            z += params.z if params.z is not None else 0
+
+        f = params.f if params.f is not None else f
 
         if params.e is not None:
-            if params.e > e[self._extruder_number]:
+            new_extrusion_value = params.e if self._is_absolute_extrusion else e[self._extruder_number] + params.e
-                path.append([x, y, z, self._layer_type])  # extrusion
+            if new_extrusion_value > e[self._extruder_number]:
+                path.append([x, y, z, f, new_extrusion_value + self._extrusion_length_offset[self._extruder_number], self._layer_type])  # extrusion
             else:
-                path.append([x, y, z, LayerPolygon.MoveRetractionType])  # retraction
+                path.append([x, y, z, f, new_extrusion_value + self._extrusion_length_offset[self._extruder_number], LayerPolygon.MoveRetractionType])  # retraction
-            e[self._extruder_number] = params.e
+            e[self._extruder_number] = new_extrusion_value
 
             # Only when extruding we can determine the latest known "layer height" which is the difference in height between extrusions
             # Also, 1.5 is a heuristic for any priming or whatsoever, we skip those.
             if z > self._previous_z and (z - self._previous_z < 1.5):
-                self._current_layer_thickness = z - self._previous_z + 0.05  # allow a tiny overlap
+                self._current_layer_thickness = z - self._previous_z # allow a tiny overlap
                 self._previous_z = z
         else:
-            path.append([x, y, z, LayerPolygon.MoveCombingType])
+            path.append([x, y, z, f, e[self._extruder_number] + self._extrusion_length_offset[self._extruder_number], LayerPolygon.MoveCombingType])
-        return self._position(x, y, z, e)
+        return self._position(x, y, z, f, e)
+
 
     # G0 and G1 should be handled exactly the same.
     _gCode1 = _gCode0
@@ -164,17 +212,31 @@ class GCodeReader(MeshReader):
             params.x if params.x is not None else position.x,
             params.y if params.y is not None else position.y,
             0,
+            position.f,
             position.e)
 
+    ##  Set the absolute positioning
+    def _gCode90(self, position, params, path):
+        self._is_absolute_positioning = True
+        return position
+
+    ##  Set the relative positioning
+    def _gCode91(self, position, params, path):
+        self._is_absolute_positioning = False
+        return position
+
     ##  Reset the current position to the values specified.
     #   For example: G92 X10 will set the X to 10 without any physical motion.
     def _gCode92(self, position, params, path):
         if params.e is not None:
+            # Sometimes a G92 E0 is introduced in the middle of the GCode so we need to keep those offsets for calculate the line_width
+            self._extrusion_length_offset[self._extruder_number] += position.e[self._extruder_number] - params.e
             position.e[self._extruder_number] = params.e
         return self._position(
             params.x if params.x is not None else position.x,
             params.y if params.y is not None else position.y,
             params.z if params.z is not None else position.z,
+            params.f if params.f is not None else position.f,
             position.e)
 
     def _processGCode(self, G, line, position, path):
@@ -182,7 +244,7 @@ class GCodeReader(MeshReader):
         line = line.split(";", 1)[0]  # Remove comments (if any)
         if func is not None:
             s = line.upper().split(" ")
-            x, y, z, e = None, None, None, None
+            x, y, z, f, e = None, None, None, None, None
             for item in s[1:]:
                 if len(item) <= 1:
                     continue
@@ -194,20 +256,31 @@ class GCodeReader(MeshReader):
                     y = float(item[1:])
                 if item[0] == "Z":
                     z = float(item[1:])
+                if item[0] == "F":
+                    f = float(item[1:]) / 60
                 if item[0] == "E":
                     e = float(item[1:])
-            if (x is not None and x < 0) or (y is not None and y < 0):
+            if self._is_absolute_positioning and ((x is not None and x < 0) or (y is not None and y < 0)):
                 self._center_is_zero = True
-            params = self._position(x, y, z, e)
+            params = self._position(x, y, z, f, e)
             return func(position, params, path)
         return position
 
     def _processTCode(self, T, line, position, path):
         self._extruder_number = T
         if self._extruder_number + 1 > len(position.e):
+            self._extrusion_length_offset.extend([0] * (self._extruder_number - len(position.e) + 1))
             position.e.extend([0] * (self._extruder_number - len(position.e) + 1))
         return position
 
+    def _processMCode(self, M):
+        if M == 82:
+            # Set absolute extrusion mode
+            self._is_absolute_extrusion = True
+        elif M == 83:
+            # Set relative extrusion mode
+            self._is_absolute_extrusion = False
+
     _type_keyword = ";TYPE:"
     _layer_keyword = ";LAYER:"
 
@@ -223,6 +296,8 @@ class GCodeReader(MeshReader):
     def read(self, file_name):
         Logger.log("d", "Preparing to load %s" % file_name)
         self._cancelled = False
+        # We obtain the filament diameter from the selected printer to calculate line widths
+        self._filament_diameter = Application.getInstance().getGlobalContainerStack().getProperty("material_diameter", "value")
 
         scene_node = SceneNode()
         # Override getBoundingBox function of the sceneNode, as this node should return a bounding box, but there is no
@@ -260,8 +335,11 @@ class GCodeReader(MeshReader):
 
             Logger.log("d", "Parsing %s..." % file_name)
 
-            current_position = self._position(0, 0, 0, [0])
+            current_position = self._position(0, 0, 0, 0, [0])
             current_path = []
+            min_layer_number = 0
+            negative_layers = 0
+            previous_layer = 0
 
             for line in file:
                 if self._cancelled:
@@ -293,12 +371,29 @@ class GCodeReader(MeshReader):
                     else:
                         Logger.log("w", "Encountered a unknown type (%s) while parsing g-code.", type)
 
+                # When the layer change is reached, the polygon is computed so we have just one layer per layer per extruder
                 if self._is_layers_in_file and line[:len(self._layer_keyword)] == self._layer_keyword:
                     try:
                         layer_number = int(line[len(self._layer_keyword):])
                         self._createPolygon(self._current_layer_thickness, current_path, self._extruder_offsets.get(self._extruder_number, [0, 0]))
                         current_path.clear()
+
+                        # When using a raft, the raft layers are stored as layers < 0, it mimics the same behavior
+                        # as in ProcessSlicedLayersJob
+                        if layer_number < min_layer_number:
+                            min_layer_number = layer_number
+                        if layer_number < 0:
+                            layer_number += abs(min_layer_number)
+                            negative_layers += 1
+                        else:
+                            layer_number += negative_layers
+
+                        # In case there is a gap in the layer count, empty layers are created
+                        for empty_layer in range(previous_layer + 1, layer_number):
+                            self._createEmptyLayer(empty_layer)
+
                         self._layer_number = layer_number
+                        previous_layer = layer_number
                     except:
                         pass
 
@@ -308,17 +403,12 @@ class GCodeReader(MeshReader):
 
                 G = self._getInt(line, "G")
                 if G is not None:
+                    # When find a movement, the new posistion is calculated and added to the current_path, but
+                    # don't need to create a polygon until the end of the layer
                     current_position = self._processGCode(G, line, current_position, current_path)
-
-                    # < 2 is a heuristic for a movement only, that should not be counted as a layer
-                    if current_position.z > last_z and abs(current_position.z - last_z) < 2:
-                        if self._createPolygon(self._current_layer_thickness, current_path, self._extruder_offsets.get(self._extruder_number, [0, 0])):
-                            current_path.clear()
-                            if not self._is_layers_in_file:
-                                self._layer_number += 1
-
                     continue
 
+                # When changing the extruder, the polygon with the stored paths is computed
                 if line.startswith("T"):
                     T = self._getInt(line, "T")
                     if T is not None:
@@ -327,8 +417,12 @@ class GCodeReader(MeshReader):
 
                         current_position = self._processTCode(T, line, current_position, current_path)
 
-            # "Flush" leftovers
+                if line.startswith("M"):
-            if not self._is_layers_in_file and len(current_path) > 1:
+                    M = self._getInt(line, "M")
+                    self._processMCode(M)
+
+            # "Flush" leftovers. Last layer paths are still stored
+            if len(current_path) > 1:
                 if self._createPolygon(self._current_layer_thickness, current_path, self._extruder_offsets.get(self._extruder_number, [0, 0])):
                     self._layer_number += 1
                     current_path.clear()

plugins/LayerView/LayerPass.py

@@ -1,113 +0,0 @@
-# Copyright (c) 2016 Ultimaker B.V.
-# Cura is released under the terms of the LGPLv3 or higher.
-
-from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
-from UM.Resources import Resources
-from UM.Scene.SceneNode import SceneNode
-from UM.Scene.ToolHandle import ToolHandle
-from UM.Application import Application
-from UM.PluginRegistry import PluginRegistry
-
-from UM.View.RenderPass import RenderPass
-from UM.View.RenderBatch import RenderBatch
-from UM.View.GL.OpenGL import OpenGL
-
-from cura.Settings.ExtruderManager import ExtruderManager
-
-
-import os.path
-
-## RenderPass used to display g-code paths.
-class LayerPass(RenderPass):
-    def __init__(self, width, height):
-        super().__init__("layerview", width, height)
-
-        self._layer_shader = None
-        self._tool_handle_shader = None
-        self._gl = OpenGL.getInstance().getBindingsObject()
-        self._scene = Application.getInstance().getController().getScene()
-        self._extruder_manager = ExtruderManager.getInstance()
-
-        self._layer_view = None
-        self._compatibility_mode = None
-
-    def setLayerView(self, layerview):
-        self._layer_view = layerview
-        self._compatibility_mode = layerview.getCompatibilityMode()
-
-    def render(self):
-        if not self._layer_shader:
-            if self._compatibility_mode:
-                shader_filename = "layers.shader"
-            else:
-                shader_filename = "layers3d.shader"
-            self._layer_shader = OpenGL.getInstance().createShaderProgram(os.path.join(PluginRegistry.getInstance().getPluginPath("LayerView"), shader_filename))
-        # Use extruder 0 if the extruder manager reports extruder index -1 (for single extrusion printers)
-        self._layer_shader.setUniformValue("u_active_extruder", float(max(0, self._extruder_manager.activeExtruderIndex)))
-        if self._layer_view:
-            self._layer_shader.setUniformValue("u_layer_view_type", self._layer_view.getLayerViewType())
-            self._layer_shader.setUniformValue("u_extruder_opacity", self._layer_view.getExtruderOpacities())
-            self._layer_shader.setUniformValue("u_show_travel_moves", self._layer_view.getShowTravelMoves())
-            self._layer_shader.setUniformValue("u_show_helpers", self._layer_view.getShowHelpers())
-            self._layer_shader.setUniformValue("u_show_skin", self._layer_view.getShowSkin())
-            self._layer_shader.setUniformValue("u_show_infill", self._layer_view.getShowInfill())
-        else:
-            #defaults
-            self._layer_shader.setUniformValue("u_layer_view_type", 1)
-            self._layer_shader.setUniformValue("u_extruder_opacity", [1, 1, 1, 1])
-            self._layer_shader.setUniformValue("u_show_travel_moves", 0)
-            self._layer_shader.setUniformValue("u_show_helpers", 1)
-            self._layer_shader.setUniformValue("u_show_skin", 1)
-            self._layer_shader.setUniformValue("u_show_infill", 1)
-
-        if not self._tool_handle_shader:
-            self._tool_handle_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "toolhandle.shader"))
-
-        self.bind()
-
-        tool_handle_batch = RenderBatch(self._tool_handle_shader, type = RenderBatch.RenderType.Overlay)
-
-        for node in DepthFirstIterator(self._scene.getRoot()):
-
-            if isinstance(node, ToolHandle):
-                tool_handle_batch.addItem(node.getWorldTransformation(), mesh = node.getSolidMesh())
-
-            elif isinstance(node, SceneNode) and (node.getMeshData() or node.callDecoration("isBlockSlicing")) and node.isVisible():
-                layer_data = node.callDecoration("getLayerData")
-                if not layer_data:
-                    continue
-
-                # Render all layers below a certain number as line mesh instead of vertices.
-                if self._layer_view._current_layer_num > -1 and ((not self._layer_view._only_show_top_layers) or (not self._layer_view.getCompatibilityMode())):
-                    start = 0
-                    end = 0
-                    element_counts = layer_data.getElementCounts()
-                    for layer in sorted(element_counts.keys()):
-                        if layer > self._layer_view._current_layer_num:
-                            break
-                        if self._layer_view._minimum_layer_num > layer:
-                            start += element_counts[layer]
-                        end += element_counts[layer]
-
-                    # This uses glDrawRangeElements internally to only draw a certain range of lines.
-                    batch = RenderBatch(self._layer_shader, type = RenderBatch.RenderType.Solid, mode = RenderBatch.RenderMode.Lines, range = (start, end))
-                    batch.addItem(node.getWorldTransformation(), layer_data)
-                    batch.render(self._scene.getActiveCamera())
-
-                # Create a new batch that is not range-limited
-                batch = RenderBatch(self._layer_shader, type = RenderBatch.RenderType.Solid)
-
-                if self._layer_view.getCurrentLayerMesh():
-                    batch.addItem(node.getWorldTransformation(), self._layer_view.getCurrentLayerMesh())
-
-                if self._layer_view.getCurrentLayerJumps():
-                    batch.addItem(node.getWorldTransformation(), self._layer_view.getCurrentLayerJumps())
-
-                if len(batch.items) > 0:
-                    batch.render(self._scene.getActiveCamera())
-
-        # Render toolhandles on top of the layerview
-        if len(tool_handle_batch.items) > 0:
-            tool_handle_batch.render(self._scene.getActiveCamera())
-
-        self.release()

plugins/LayerView/LayerView.qml

@@ -1,388 +0,0 @@
-// Copyright (c) 2017 Ultimaker B.V.
-// Cura is released under the terms of the LGPLv3 or higher.
-
-import QtQuick 2.4
-import QtQuick.Controls 1.2
-import QtQuick.Layouts 1.1
-import QtQuick.Controls.Styles 1.1
-
-import UM 1.0 as UM
-import Cura 1.0 as Cura
-
-Item
-{
-    id: base
-    width: {
-        if (UM.LayerView.compatibilityMode) {
-            return UM.Theme.getSize("layerview_menu_size_compatibility").width;
-        } else {
-            return UM.Theme.getSize("layerview_menu_size").width;
-        }
-    }
-    height: {
-        if (UM.LayerView.compatibilityMode) {
-            return UM.Theme.getSize("layerview_menu_size_compatibility").height;
-        } else if (UM.Preferences.getValue("layerview/layer_view_type") == 0) {
-            return UM.Theme.getSize("layerview_menu_size_material_color_mode").height + UM.LayerView.extruderCount * (UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("layerview_row_spacing").height)
-        } else {
-            return UM.Theme.getSize("layerview_menu_size").height + UM.LayerView.extruderCount * (UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("layerview_row_spacing").height)
-        }
-    }
-
-    property var buttonTarget: {
-        if(parent != null)
-        {
-            var force_binding = parent.y; // ensure this gets reevaluated when the panel moves
-            return base.mapFromItem(parent.parent, parent.buttonTarget.x, parent.buttonTarget.y)
-        }
-        return Qt.point(0,0)
-    }
-
-    visible: parent != null ? !parent.parent.monitoringPrint: true
-
-    UM.PointingRectangle {
-        id: layerViewMenu
-        anchors.right: parent.right
-        anchors.top: parent.top
-        width: parent.width
-        height: parent.height
-        z: slider.z - 1
-        color: UM.Theme.getColor("tool_panel_background")
-        borderWidth: UM.Theme.getSize("default_lining").width
-        borderColor: UM.Theme.getColor("lining")
-        arrowSize: 0 // hide arrow until weird issue with first time rendering is fixed
-
-        ColumnLayout {
-            id: view_settings
-
-            property var extruder_opacities: UM.Preferences.getValue("layerview/extruder_opacities").split("|")
-            property bool show_travel_moves: UM.Preferences.getValue("layerview/show_travel_moves")
-            property bool show_helpers: UM.Preferences.getValue("layerview/show_helpers")
-            property bool show_skin: UM.Preferences.getValue("layerview/show_skin")
-            property bool show_infill: UM.Preferences.getValue("layerview/show_infill")
-            // if we are in compatibility mode, we only show the "line type"
-            property bool show_legend: UM.LayerView.compatibilityMode ? 1 : UM.Preferences.getValue("layerview/layer_view_type") == 1
-            property bool only_show_top_layers: UM.Preferences.getValue("view/only_show_top_layers")
-            property int top_layer_count: UM.Preferences.getValue("view/top_layer_count")
-
-            anchors.top: parent.top
-            anchors.topMargin: UM.Theme.getSize("default_margin").height
-            anchors.left: parent.left
-            anchors.leftMargin: UM.Theme.getSize("default_margin").width
-            spacing: UM.Theme.getSize("layerview_row_spacing").height
-            anchors.right: parent.right
-            anchors.rightMargin: UM.Theme.getSize("default_margin").width
-
-            Label
-            {
-                id: layerViewTypesLabel
-                anchors.left: parent.left
-                text: catalog.i18nc("@label","Color scheme")
-                font: UM.Theme.getFont("default");
-                visible: !UM.LayerView.compatibilityMode
-                Layout.fillWidth: true
-                color: UM.Theme.getColor("setting_control_text")
-            }
-
-            ListModel  // matches LayerView.py
-            {
-                id: layerViewTypes
-            }
-
-            Component.onCompleted:
-            {
-                layerViewTypes.append({
-                    text: catalog.i18nc("@label:listbox", "Material Color"),
-                    type_id: 0
-                })
-                layerViewTypes.append({
-                    text: catalog.i18nc("@label:listbox", "Line Type"),
-                    type_id: 1  // these ids match the switching in the shader
-                })
-            }
-
-            ComboBox
-            {
-                id: layerTypeCombobox
-                anchors.left: parent.left
-                Layout.fillWidth: true
-                Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
-                model: layerViewTypes
-                visible: !UM.LayerView.compatibilityMode
-                style: UM.Theme.styles.combobox
-                anchors.right: parent.right
-                anchors.rightMargin: 10 * screenScaleFactor
-
-                onActivated:
-                {
-                    UM.Preferences.setValue("layerview/layer_view_type", index);
-                }
-
-                Component.onCompleted:
-                {
-                    currentIndex = UM.LayerView.compatibilityMode ? 1 : UM.Preferences.getValue("layerview/layer_view_type");
-                    updateLegends(currentIndex);
-                }
-
-                function updateLegends(type_id)
-                {
-                    // update visibility of legends
-                    view_settings.show_legend = UM.LayerView.compatibilityMode || (type_id == 1);
-                }
-
-            }
-
-            Label
-            {
-                id: compatibilityModeLabel
-                anchors.left: parent.left
-                text: catalog.i18nc("@label","Compatibility Mode")
-                font: UM.Theme.getFont("default")
-                color: UM.Theme.getColor("text")
-                visible: UM.LayerView.compatibilityMode
-                Layout.fillWidth: true
-                Layout.preferredHeight: UM.Theme.getSize("layerview_row").height
-                Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
-            }
-
-            Label
-            {
-                id: space2Label
-                anchors.left: parent.left
-                text: " "
-                font.pointSize: 0.5
-            }
-
-            Connections {
-                target: UM.Preferences
-                onPreferenceChanged:
-                {
-                    layerTypeCombobox.currentIndex = UM.LayerView.compatibilityMode ? 1 : UM.Preferences.getValue("layerview/layer_view_type");
-                    layerTypeCombobox.updateLegends(layerTypeCombobox.currentIndex);
-                    view_settings.extruder_opacities = UM.Preferences.getValue("layerview/extruder_opacities").split("|");
-                    view_settings.show_travel_moves = UM.Preferences.getValue("layerview/show_travel_moves");
-                    view_settings.show_helpers = UM.Preferences.getValue("layerview/show_helpers");
-                    view_settings.show_skin = UM.Preferences.getValue("layerview/show_skin");
-                    view_settings.show_infill = UM.Preferences.getValue("layerview/show_infill");
-                    view_settings.only_show_top_layers = UM.Preferences.getValue("view/only_show_top_layers");
-                    view_settings.top_layer_count = UM.Preferences.getValue("view/top_layer_count");
-                }
-            }
-
-            Repeater {
-                model: Cura.ExtrudersModel{}
-                CheckBox {
-                    id: extrudersModelCheckBox
-                    checked: view_settings.extruder_opacities[index] > 0.5 || view_settings.extruder_opacities[index] == undefined || view_settings.extruder_opacities[index] == ""
-                    onClicked: {
-                        view_settings.extruder_opacities[index] = checked ? 1.0 : 0.0
-                        UM.Preferences.setValue("layerview/extruder_opacities", view_settings.extruder_opacities.join("|"));
-                    }
-                    visible: !UM.LayerView.compatibilityMode
-                    enabled: index + 1 <= 4
-                    Rectangle {
-                        anchors.verticalCenter: parent.verticalCenter
-                        anchors.right: extrudersModelCheckBox.right
-                        anchors.rightMargin: UM.Theme.getSize("default_margin").width
-                        width: UM.Theme.getSize("layerview_legend_size").width
-                        height: UM.Theme.getSize("layerview_legend_size").height
-                        color: model.color
-                        radius: width / 2
-                        border.width: UM.Theme.getSize("default_lining").width
-                        border.color: UM.Theme.getColor("lining")
-                        visible: !view_settings.show_legend
-                    }
-                    Layout.fillWidth: true
-                    Layout.preferredHeight: UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("default_lining").height
-                    Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
-                    style: UM.Theme.styles.checkbox
-                    Label
-                    {
-                        text: model.name
-                        elide: Text.ElideRight
-                        color: UM.Theme.getColor("setting_control_text")
-                        font: UM.Theme.getFont("default")
-                        anchors.verticalCenter: parent.verticalCenter
-                        anchors.left: extrudersModelCheckBox.left;
-                        anchors.right: extrudersModelCheckBox.right;
-                        anchors.leftMargin: UM.Theme.getSize("checkbox").width + UM.Theme.getSize("default_margin").width /2
-                        anchors.rightMargin: UM.Theme.getSize("default_margin").width * 2
-                    }
-                }
-            }
-
-            Repeater {
-                model: ListModel {
-                    id: typesLegenModel
-                    Component.onCompleted:
-                    {
-                        typesLegenModel.append({
-                            label: catalog.i18nc("@label", "Show Travels"),
-                            initialValue: view_settings.show_travel_moves,
-                            preference: "layerview/show_travel_moves",
-                            colorId:  "layerview_move_combing"
-                        });
-                        typesLegenModel.append({
-                            label: catalog.i18nc("@label", "Show Helpers"),
-                            initialValue: view_settings.show_helpers,
-                            preference: "layerview/show_helpers",
-                            colorId:  "layerview_support"
-                        });
-                        typesLegenModel.append({
-                            label: catalog.i18nc("@label", "Show Shell"),
-                            initialValue: view_settings.show_skin,
-                            preference: "layerview/show_skin",
-                            colorId:  "layerview_inset_0"
-                        });
-                        typesLegenModel.append({
-                            label: catalog.i18nc("@label", "Show Infill"),
-                            initialValue: view_settings.show_infill,
-                            preference: "layerview/show_infill",
-                            colorId:  "layerview_infill"
-                        });
-                    }
-                }
-
-                CheckBox {
-                    id: legendModelCheckBox
-                    checked: model.initialValue
-                    onClicked: {
-                        UM.Preferences.setValue(model.preference, checked);
-                    }
-                    Rectangle {
-                        anchors.verticalCenter: parent.verticalCenter
-                        anchors.right: legendModelCheckBox.right
-                        anchors.rightMargin: UM.Theme.getSize("default_margin").width
-                        width: UM.Theme.getSize("layerview_legend_size").width
-                        height: UM.Theme.getSize("layerview_legend_size").height
-                        color: UM.Theme.getColor(model.colorId)
-                        border.width: UM.Theme.getSize("default_lining").width
-                        border.color: UM.Theme.getColor("lining")
-                        visible: view_settings.show_legend
-                    }
-                    Layout.fillWidth: true
-                    Layout.preferredHeight: UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("default_lining").height
-                    Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
-                    style: UM.Theme.styles.checkbox
-                    Label
-                    {
-                        text: label
-                        font: UM.Theme.getFont("default")
-                        elide: Text.ElideRight
-                        color: UM.Theme.getColor("setting_control_text")
-                        anchors.verticalCenter: parent.verticalCenter
-                        anchors.left: legendModelCheckBox.left;
-                        anchors.right: legendModelCheckBox.right;
-                        anchors.leftMargin: UM.Theme.getSize("checkbox").width + UM.Theme.getSize("default_margin").width /2
-                        anchors.rightMargin: UM.Theme.getSize("default_margin").width * 2
-                    }
-                }
-            }
-
-            CheckBox {
-                checked: view_settings.only_show_top_layers
-                onClicked: {
-                    UM.Preferences.setValue("view/only_show_top_layers", checked ? 1.0 : 0.0);
-                }
-                text: catalog.i18nc("@label", "Only Show Top Layers")
-                visible: UM.LayerView.compatibilityMode
-                style: UM.Theme.styles.checkbox
-            }
-            CheckBox {
-                checked: view_settings.top_layer_count == 5
-                onClicked: {
-                    UM.Preferences.setValue("view/top_layer_count", checked ? 5 : 1);
-                }
-                text: catalog.i18nc("@label", "Show 5 Detailed Layers On Top")
-                visible: UM.LayerView.compatibilityMode
-                style: UM.Theme.styles.checkbox
-            }
-
-            Repeater {
-                model: ListModel {
-                    id: typesLegenModelNoCheck
-                    Component.onCompleted:
-                    {
-                        typesLegenModelNoCheck.append({
-                            label: catalog.i18nc("@label", "Top / Bottom"),
-                            colorId: "layerview_skin",
-                        });
-                        typesLegenModelNoCheck.append({
-                            label: catalog.i18nc("@label", "Inner Wall"),
-                            colorId: "layerview_inset_x",
-                        });
-                    }
-                }
-
-                Label {
-                    text: label
-                    visible: view_settings.show_legend
-                    id: typesLegendModelLabel
-                    Rectangle {
-                        anchors.verticalCenter: parent.verticalCenter
-                        anchors.right: typesLegendModelLabel.right
-                        anchors.rightMargin: UM.Theme.getSize("default_margin").width
-                        width: UM.Theme.getSize("layerview_legend_size").width
-                        height: UM.Theme.getSize("layerview_legend_size").height
-                        color: UM.Theme.getColor(model.colorId)
-                        border.width: UM.Theme.getSize("default_lining").width
-                        border.color: UM.Theme.getColor("lining")
-                        visible: view_settings.show_legend
-                    }
-                    Layout.fillWidth: true
-                    Layout.preferredHeight: UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("default_lining").height
-                    Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
-                    color: UM.Theme.getColor("setting_control_text")
-                    font: UM.Theme.getFont("default")
-                }
-            }
-        }
-
-        LayerSlider {
-            id: slider
-
-            width: UM.Theme.getSize("slider_handle").width
-            height: UM.Theme.getSize("layerview_menu_size").height
-
-            anchors {
-                top: parent.bottom
-                topMargin: UM.Theme.getSize("slider_layerview_margin").height
-                right: layerViewMenu.right
-                rightMargin: UM.Theme.getSize("slider_layerview_margin").width
-            }
-
-            // custom properties
-            upperValue: UM.LayerView.currentLayer
-            lowerValue: UM.LayerView.minimumLayer
-            maximumValue: UM.LayerView.numLayers
-            handleSize: UM.Theme.getSize("slider_handle").width
-            trackThickness: UM.Theme.getSize("slider_groove").width
-            trackColor: UM.Theme.getColor("slider_groove")
-            trackBorderColor: UM.Theme.getColor("slider_groove_border")
-            upperHandleColor: UM.Theme.getColor("slider_handle")
-            lowerHandleColor: UM.Theme.getColor("slider_handle")
-            rangeHandleColor: UM.Theme.getColor("slider_groove_fill")
-            handleLabelWidth: UM.Theme.getSize("slider_layerview_background").width
-            layersVisible: UM.LayerView.layerActivity && CuraApplication.platformActivity ? true : false
-
-            // update values when layer data changes
-            Connections {
-                target: UM.LayerView
-                onMaxLayersChanged: slider.setUpperValue(UM.LayerView.currentLayer)
-                onMinimumLayerChanged: slider.setLowerValue(UM.LayerView.minimumLayer)
-                onCurrentLayerChanged: slider.setUpperValue(UM.LayerView.currentLayer)
-            }
-
-            // make sure the slider handlers show the correct value after switching views
-            Component.onCompleted: {
-                slider.setLowerValue(UM.LayerView.minimumLayer)
-                slider.setUpperValue(UM.LayerView.currentLayer)
-            }
-        }
-    }
-
-    FontMetrics {
-        id: fontMetrics
-        font: UM.Theme.getFont("default")
-    }
-}

plugins/LayerView/LayerViewProxy.py

@@ -1,151 +0,0 @@
-from PyQt5.QtCore import QObject, pyqtSignal, pyqtProperty
-from UM.FlameProfiler import pyqtSlot
-from UM.Application import Application
-
-import LayerView
-
-
-class LayerViewProxy(QObject):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-        self._current_layer = 0
-        self._controller = Application.getInstance().getController()
-        self._controller.activeViewChanged.connect(self._onActiveViewChanged)
-        self._onActiveViewChanged()
-    
-    currentLayerChanged = pyqtSignal()
-    maxLayersChanged = pyqtSignal()
-    activityChanged = pyqtSignal()
-    globalStackChanged = pyqtSignal()
-    preferencesChanged = pyqtSignal()
-    busyChanged = pyqtSignal()
-
-    @pyqtProperty(bool, notify=activityChanged)
-    def layerActivity(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getActivity()
-
-    @pyqtProperty(int, notify=maxLayersChanged)
-    def numLayers(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getMaxLayers()
-
-    @pyqtProperty(int, notify=currentLayerChanged)
-    def currentLayer(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getCurrentLayer()
-
-    @pyqtProperty(int, notify=currentLayerChanged)
-    def minimumLayer(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getMinimumLayer()
-
-    @pyqtProperty(bool, notify=busyChanged)
-    def busy(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.isBusy()
-
-        return False
-
-    @pyqtProperty(bool, notify=preferencesChanged)
-    def compatibilityMode(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getCompatibilityMode()
-        return False
-
-    @pyqtSlot(int)
-    def setCurrentLayer(self, layer_num):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setLayer(layer_num)
-
-    @pyqtSlot(int)
-    def setMinimumLayer(self, layer_num):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setMinimumLayer(layer_num)
-
-    @pyqtSlot(int)
-    def setLayerViewType(self, layer_view_type):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setLayerViewType(layer_view_type)
-
-    @pyqtSlot(result=int)
-    def getLayerViewType(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getLayerViewType()
-        return 0
-
-    # Opacity 0..1
-    @pyqtSlot(int, float)
-    def setExtruderOpacity(self, extruder_nr, opacity):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setExtruderOpacity(extruder_nr, opacity)
-
-    @pyqtSlot(int)
-    def setShowTravelMoves(self, show):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setShowTravelMoves(show)
-
-    @pyqtSlot(int)
-    def setShowHelpers(self, show):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setShowHelpers(show)
-
-    @pyqtSlot(int)
-    def setShowSkin(self, show):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setShowSkin(show)
-
-    @pyqtSlot(int)
-    def setShowInfill(self, show):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.setShowInfill(show)
-
-    @pyqtProperty(int, notify=globalStackChanged)
-    def extruderCount(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            return active_view.getExtruderCount()
-        return 0
-
-    def _layerActivityChanged(self):
-        self.activityChanged.emit()
-            
-    def _onLayerChanged(self):
-        self.currentLayerChanged.emit()
-        self._layerActivityChanged()
-
-    def _onMaxLayersChanged(self):
-        self.maxLayersChanged.emit()
-
-    def _onBusyChanged(self):
-        self.busyChanged.emit()
-
-    def _onGlobalStackChanged(self):
-        self.globalStackChanged.emit()
-
-    def _onPreferencesChanged(self):
-        self.preferencesChanged.emit()
-
-    def _onActiveViewChanged(self):
-        active_view = self._controller.getActiveView()
-        if type(active_view) == LayerView.LayerView.LayerView:
-            active_view.currentLayerNumChanged.connect(self._onLayerChanged)
-            active_view.maxLayersChanged.connect(self._onMaxLayersChanged)
-            active_view.busyChanged.connect(self._onBusyChanged)
-            active_view.globalStackChanged.connect(self._onGlobalStackChanged)
-            active_view.preferencesChanged.connect(self._onPreferencesChanged)

plugins/LayerView/__init__.py

@@ -1,25 +0,0 @@
-# Copyright (c) 2015 Ultimaker B.V.
-# Cura is released under the terms of the LGPLv3 or higher.
-
-from . import LayerView, LayerViewProxy
-from PyQt5.QtQml import qmlRegisterType, qmlRegisterSingletonType
-
-from UM.i18n import i18nCatalog
-catalog = i18nCatalog("cura")
-
-def getMetaData():
-    return {
-        "view": {
-            "name": catalog.i18nc("@item:inlistbox", "Layer view"),
-            "view_panel": "LayerView.qml",
-            "weight": 2
-        }
-    }
-
-def createLayerViewProxy(engine, script_engine):
-    return LayerViewProxy.LayerViewProxy()
-
-def register(app):
-    layer_view = LayerView.LayerView()
-    qmlRegisterSingletonType(LayerViewProxy.LayerViewProxy, "UM", 1, 0, "LayerView", layer_view.getProxy)
-    return { "view": LayerView.LayerView() }

plugins/MachineSettingsAction/MachineSettingsAction.py

@@ -116,8 +116,7 @@ class MachineSettingsAction(MachineAction):
 
     @pyqtSlot(int)
     def setMachineExtruderCount(self, extruder_count):
-        machine_manager = Application.getInstance().getMachineManager()
+        extruder_manager = Application.getInstance().getExtruderManager()
-        extruder_manager = ExtruderManager.getInstance()
 
         definition_changes_container = self._global_container_stack.definitionChanges
         if not self._global_container_stack or definition_changes_container == self._empty_container:
@@ -127,38 +126,16 @@ class MachineSettingsAction(MachineAction):
         if extruder_count == previous_extruder_count:
             return
 
-        extruder_material_id = None
+        # reset all extruder number settings whose value is no longer valid
-        extruder_variant_id = None
+        for setting_instance in self._global_container_stack.userChanges.findInstances():
-        if extruder_count == 1:
-            # Get the material and variant of the first extruder before setting the number extruders to 1
-            if machine_manager.hasMaterials:
-                extruder_material_id = machine_manager.allActiveMaterialIds[extruder_manager.extruderIds["0"]]
-            if machine_manager.hasVariants:
-                extruder_variant_id = machine_manager.allActiveVariantIds[extruder_manager.extruderIds["0"]]
-
-            # Copy any settable_per_extruder setting value from the extruders to the global stack
-            extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
-            extruder_stacks.reverse() # make sure the first extruder is done last, so its settings override any higher extruder settings
-
-            global_user_container = self._global_container_stack.getTop()
-            for extruder_stack in extruder_stacks:
-                extruder_index = extruder_stack.getMetaDataEntry("position")
-                extruder_user_container = extruder_stack.getTop()
-                for setting_instance in extruder_user_container.findInstances():
             setting_key = setting_instance.definition.key
-                    settable_per_extruder = self._global_container_stack.getProperty(setting_key, "settable_per_extruder")
+            if not self._global_container_stack.getProperty(setting_key, "type") in ("extruder", "optional_extruder"):
-                    if settable_per_extruder:
+                continue
-                        limit_to_extruder = self._global_container_stack.getProperty(setting_key, "limit_to_extruder")
 
-                        if limit_to_extruder == "-1" or limit_to_extruder == extruder_index:
+            old_value = int(self._global_container_stack.userChanges.getProperty(setting_key, "value"))
-                            global_user_container.setProperty(setting_key, "value", extruder_user_container.getProperty(setting_key, "value"))
+            if old_value >= extruder_count:
-                            extruder_user_container.removeInstance(setting_key)
+                self._global_container_stack.userChanges.removeInstance(setting_key)
-
+                Logger.log("d", "Reset [%s] because its old value [%s] is no longer valid ", setting_key, old_value)
-        # Check to see if any features are set to print with an extruder that will no longer exist
-        for setting_key in ["adhesion_extruder_nr", "support_extruder_nr", "support_extruder_nr_layer_0", "support_infill_extruder_nr", "support_interface_extruder_nr"]:
-            if int(self._global_container_stack.getProperty(setting_key, "value")) > extruder_count - 1:
-                Logger.log("i", "Lowering %s setting to match number of extruders", setting_key)
-                self._global_container_stack.getTop().setProperty(setting_key, "value", extruder_count - 1)
 
         # Check to see if any objects are set to print with an extruder that will no longer exist
         root_node = Application.getInstance().getController().getScene().getRoot()
@@ -171,14 +148,13 @@ class MachineSettingsAction(MachineAction):
 
         definition_changes_container.setProperty("machine_extruder_count", "value", extruder_count)
 
-        if extruder_count > 1:
-            # Multiextrusion
-
         # Make sure one of the extruder stacks is active
-            if extruder_manager.activeExtruderIndex == -1:
         extruder_manager.setActiveExtruderIndex(0)
 
         # Move settable_per_extruder values out of the global container
+        # After CURA-4482 this should not be the case anymore, but we still want to support older project files.
+        global_user_container = self._global_container_stack.getTop()
+
         if previous_extruder_count == 1:
             extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
             global_user_container = self._global_container_stack.getTop()
@@ -186,37 +162,15 @@ class MachineSettingsAction(MachineAction):
         for setting_instance in global_user_container.findInstances():
             setting_key = setting_instance.definition.key
             settable_per_extruder = self._global_container_stack.getProperty(setting_key, "settable_per_extruder")
+
             if settable_per_extruder:
                 limit_to_extruder = int(self._global_container_stack.getProperty(setting_key, "limit_to_extruder"))
                 extruder_stack = extruder_stacks[max(0, limit_to_extruder)]
                 extruder_stack.getTop().setProperty(setting_key, "value", global_user_container.getProperty(setting_key, "value"))
                 global_user_container.removeInstance(setting_key)
-        else:
-            # Single extrusion
-
-            # Make sure the machine stack is active
-            if extruder_manager.activeExtruderIndex > -1:
-                extruder_manager.setActiveExtruderIndex(-1)
-
-            # Restore material and variant on global stack
-            # MachineManager._onGlobalContainerChanged removes the global material and variant of multiextruder machines
-            if extruder_material_id or extruder_variant_id:
-                # Prevent the DiscardOrKeepProfileChangesDialog from popping up (twice) if there are user changes
-                # The dialog is not relevant here, since we're restoring the previous situation as good as possible
-                preferences = Preferences.getInstance()
-                choice_on_profile_override = preferences.getValue("cura/choice_on_profile_override")
-                preferences.setValue("cura/choice_on_profile_override", "always_keep")
-
-                if extruder_material_id:
-                    machine_manager.setActiveMaterial(extruder_material_id)
-                if extruder_variant_id:
-                    machine_manager.setActiveVariant(extruder_variant_id)
-
-                preferences.setValue("cura/choice_on_profile_override", choice_on_profile_override)
 
         self.forceUpdate()
 
-
     @pyqtSlot()
     def forceUpdate(self):
         # Force rebuilding the build volume by reloading the global container stack.
@@ -269,16 +223,13 @@ class MachineSettingsAction(MachineAction):
         if not self._global_container_stack.getMetaDataEntry("has_materials", False):
             return
 
-        machine_extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
-        if machine_extruder_count > 1:
         material = ExtruderManager.getInstance().getActiveExtruderStack().material
-        else:
-            material = self._global_container_stack.material
         material_diameter = material.getProperty("material_diameter", "value")
-        if not material_diameter: # in case of "empty" material
+        if not material_diameter:
+            # in case of "empty" material
             material_diameter = 0
-        material_approximate_diameter = str(round(material_diameter))
 
+        material_approximate_diameter = str(round(material_diameter))
         definition_changes = self._global_container_stack.definitionChanges
         machine_diameter = definition_changes.getProperty("material_diameter", "value")
         if not machine_diameter:
@@ -288,10 +239,7 @@ class MachineSettingsAction(MachineAction):
         if material_approximate_diameter != machine_approximate_diameter:
             Logger.log("i", "The the currently active material(s) do not match the diameter set for the printer. Finding alternatives.")
 
-            if machine_extruder_count > 1:
             stacks = ExtruderManager.getInstance().getExtruderStacks()
-            else:
-                stacks = [self._global_container_stack]
 
             if self._global_container_stack.getMetaDataEntry("has_machine_materials", False):
                 materials_definition = self._global_container_stack.definition.getId()
@@ -332,7 +280,7 @@ class MachineSettingsAction(MachineAction):
                     search_criteria["id"] = stack.getMetaDataEntry("preferred_material")
                     materials = self._container_registry.findInstanceContainers(**search_criteria)
                 if not materials:
-                    # Preferrd material with new diameter is not found, search for any material
+                    # Preferred material with new diameter is not found, search for any material
                     search_criteria.pop("id", None)
                     materials = self._container_registry.findInstanceContainers(**search_criteria)
                 if not materials:

plugins/PerObjectSettingsTool/PerObjectSettingsTool.py

@@ -78,21 +78,16 @@ class PerObjectSettingsTool(Tool):
     def _onGlobalContainerChanged(self):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
+
+            # used for enabling or disabling per extruder settings per object
             self._multi_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
 
-            # Ensure that all extruder data is reset
+            extruder_stack = ExtruderManager.getInstance().getExtruderStack(0)
-            if not self._multi_extrusion:
-                default_stack_id = global_container_stack.getId()
-            else:
-                default_stack = ExtruderManager.getInstance().getExtruderStack(0)
-                if default_stack:
-                    default_stack_id = default_stack.getId()
-                else:
-                    default_stack_id = global_container_stack.getId()
 
+            if extruder_stack:
                 root_node = Application.getInstance().getController().getScene().getRoot()
                 for node in DepthFirstIterator(root_node):
-                new_stack_id = default_stack_id
+                    new_stack_id = extruder_stack.getId()
                     # Get position of old extruder stack for this node
                     old_extruder_pos = node.callDecoration("getActiveExtruderPosition")
                     if old_extruder_pos is not None:

plugins/PluginBrowser/PluginBrowser.qml

@@ -114,7 +114,7 @@ UM.Dialog
                         anchors.rightMargin: UM.Theme.getSize("default_margin").width
                         Label
                         {
-                            text: "<b>" + model.name + "</b> - " + model.author
+                            text: "<b>" + model.name + "</b>" + ((model.author !== "") ? (" - " + model.author) : "")
                             width: contentWidth
                             height: contentHeight +  UM.Theme.getSize("default_margin").height
                             verticalAlignment: Text.AlignVCenter

plugins/RemovableDriveOutputDevice/OSXRemovableDrivePlugin.py

@@ -4,8 +4,6 @@
 
 from . import RemovableDrivePlugin
 
-from UM.Logger import Logger
-
 import subprocess
 import os
 
@@ -15,12 +13,12 @@ import plistlib
 class OSXRemovableDrivePlugin(RemovableDrivePlugin.RemovableDrivePlugin):
     def checkRemovableDrives(self):
         drives = {}
-        p = subprocess.Popen(["system_profiler", "SPUSBDataType", "-xml"], stdout = subprocess.PIPE)
+        p = subprocess.Popen(["system_profiler", "SPUSBDataType", "-xml"], stdout = subprocess.PIPE, stderr = subprocess.PIPE)
         plist = plistlib.loads(p.communicate()[0])
 
         result = self._recursiveSearch(plist, "removable_media")
 
-        p = subprocess.Popen(["system_profiler", "SPCardReaderDataType", "-xml"], stdout=subprocess.PIPE)
+        p = subprocess.Popen(["system_profiler", "SPCardReaderDataType", "-xml"], stdout=subprocess.PIPE, stderr = subprocess.PIPE)
         plist = plistlib.loads(p.communicate()[0])
 
         result.extend(self._recursiveSearch(plist, "removable_media"))

plugins/SimulationView/LayerSlider.qml

@@ -19,6 +19,7 @@ Item {
     property color upperHandleColor: "black"
     property color lowerHandleColor: "black"
     property color rangeHandleColor: "black"
+    property color handleActiveColor: "white"
     property real handleLabelWidth: width
     property var activeHandle: upperHandle
 
@@ -100,8 +101,8 @@ Item {
             var lowerValue = sliderRoot.getLowerValueFromSliderHandle()
 
             // set both values after moving the handle position
-            UM.LayerView.setCurrentLayer(upperValue)
+            UM.SimulationView.setCurrentLayer(upperValue)
-            UM.LayerView.setMinimumLayer(lowerValue)
+            UM.SimulationView.setMinimumLayer(lowerValue)
         }
 
         function setValue (value) {
@@ -109,8 +110,8 @@ Item {
             value = Math.min(value, sliderRoot.maximumValue)
             value = Math.max(value, sliderRoot.minimumValue + range)
 
-            UM.LayerView.setCurrentLayer(value)
+            UM.SimulationView.setCurrentLayer(value)
-            UM.LayerView.setMinimumLayer(value - range)
+            UM.SimulationView.setMinimumLayer(value - range)
         }
 
         Rectangle {
@@ -134,7 +135,7 @@ Item {
             onPressed: sliderRoot.setActiveHandle(rangeHandle)
         }
 
-        LayerSliderLabel {
+        SimulationSliderLabel {
             id: rangleHandleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -146,7 +147,7 @@ Item {
             // custom properties
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.upperValue
-            busy: UM.LayerView.busy
+            busy: UM.SimulationView.busy
             setValue: rangeHandle.setValue // connect callback functions
         }
     }
@@ -160,7 +161,7 @@ Item {
         height: sliderRoot.handleSize
         anchors.horizontalCenter: sliderRoot.horizontalCenter
         radius: sliderRoot.handleRadius
-        color: sliderRoot.upperHandleColor
+        color: upperHandleLabel.activeFocus ? sliderRoot.handleActiveColor : sliderRoot.upperHandleColor
         visible: sliderRoot.layersVisible
 
         function onHandleDragged () {
@@ -174,7 +175,7 @@ Item {
             sliderRoot.updateRangeHandle()
 
             // set the new value after moving the handle position
-            UM.LayerView.setCurrentLayer(getValue())
+            UM.SimulationView.setCurrentLayer(getValue())
         }
 
         // get the upper value based on the slider position
@@ -188,7 +189,7 @@ Item {
         // set the slider position based on the upper value
         function setValue (value) {
 
-            UM.LayerView.setCurrentLayer(value)
+            UM.SimulationView.setCurrentLayer(value)
 
             var diff = (value - sliderRoot.maximumValue) / (sliderRoot.minimumValue - sliderRoot.maximumValue)
             var newUpperYPosition = Math.round(diff * (sliderRoot.height - (2 * sliderRoot.handleSize + sliderRoot.minimumRangeHandleSize)))
@@ -198,6 +199,9 @@ Item {
             sliderRoot.updateRangeHandle()
         }
 
+        Keys.onUpPressed: upperHandleLabel.setValue(upperHandleLabel.value + ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
+        Keys.onDownPressed: upperHandleLabel.setValue(upperHandleLabel.value - ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
+
         // dragging
         MouseArea {
             anchors.fill: parent
@@ -210,10 +214,13 @@ Item {
             }
 
             onPositionChanged: parent.onHandleDragged()
-            onPressed: sliderRoot.setActiveHandle(upperHandle)
+            onPressed: {
+                sliderRoot.setActiveHandle(upperHandle)
+                upperHandleLabel.forceActiveFocus()
+            }
         }
 
-        LayerSliderLabel {
+        SimulationSliderLabel {
             id: upperHandleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -225,7 +232,7 @@ Item {
             // custom properties
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.upperValue
-            busy: UM.LayerView.busy
+            busy: UM.SimulationView.busy
             setValue: upperHandle.setValue // connect callback functions
         }
     }
@@ -239,9 +246,9 @@ Item {
         height: parent.handleSize
         anchors.horizontalCenter: parent.horizontalCenter
         radius: sliderRoot.handleRadius
-        color: sliderRoot.lowerHandleColor
+        color: lowerHandleLabel.activeFocus ? sliderRoot.handleActiveColor : sliderRoot.lowerHandleColor
 
-        visible: slider.layersVisible
+        visible: sliderRoot.layersVisible
 
         function onHandleDragged () {
 
@@ -254,7 +261,7 @@ Item {
             sliderRoot.updateRangeHandle()
 
             // set the new value after moving the handle position
-            UM.LayerView.setMinimumLayer(getValue())
+            UM.SimulationView.setMinimumLayer(getValue())
         }
 
         // get the lower value from the current slider position
@@ -268,7 +275,7 @@ Item {
         // set the slider position based on the lower value
         function setValue (value) {
 
-            UM.LayerView.setMinimumLayer(value)
+            UM.SimulationView.setMinimumLayer(value)
 
             var diff = (value - sliderRoot.maximumValue) / (sliderRoot.minimumValue - sliderRoot.maximumValue)
             var newLowerYPosition = Math.round((sliderRoot.handleSize + sliderRoot.minimumRangeHandleSize) + diff * (sliderRoot.height - (2 * sliderRoot.handleSize + sliderRoot.minimumRangeHandleSize)))
@@ -278,6 +285,9 @@ Item {
             sliderRoot.updateRangeHandle()
         }
 
+        Keys.onUpPressed: lowerHandleLabel.setValue(lowerHandleLabel.value + ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
+        Keys.onDownPressed: lowerHandleLabel.setValue(lowerHandleLabel.value - ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
+
         // dragging
         MouseArea {
             anchors.fill: parent
@@ -290,10 +300,13 @@ Item {
             }
 
             onPositionChanged: parent.onHandleDragged()
-            onPressed: sliderRoot.setActiveHandle(lowerHandle)
+            onPressed: {
+                sliderRoot.setActiveHandle(lowerHandle)
+                lowerHandleLabel.forceActiveFocus()
+            }
         }
 
-        LayerSliderLabel {
+        SimulationSliderLabel {
             id: lowerHandleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -305,7 +318,7 @@ Item {
             // custom properties
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.lowerValue
-            busy: UM.LayerView.busy
+            busy: UM.SimulationView.busy
             setValue: lowerHandle.setValue // connect callback functions
         }
     }

plugins/SimulationView/NozzleNode.py

@@ -0,0 +1,49 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM.Application import Application
+from UM.Math.Color import Color
+from UM.Math.Vector import Vector
+from UM.PluginRegistry import PluginRegistry
+from UM.Scene.SceneNode import SceneNode
+from UM.View.GL.OpenGL import OpenGL
+from UM.Resources import Resources
+
+import os
+
+class NozzleNode(SceneNode):
+    def __init__(self, parent = None):
+        super().__init__(parent)
+
+        self._shader = None
+        self.setCalculateBoundingBox(False)
+        self._createNozzleMesh()
+
+    def _createNozzleMesh(self):
+        mesh_file = "resources/nozzle.stl"
+        try:
+            path = os.path.join(PluginRegistry.getInstance().getPluginPath("SimulationView"), mesh_file)
+        except FileNotFoundError:
+            path = ""
+
+        reader = Application.getInstance().getMeshFileHandler().getReaderForFile(path)
+        node = reader.read(path)
+
+        if node.getMeshData():
+            self.setMeshData(node.getMeshData())
+
+    def render(self, renderer):
+        # Avoid to render if it is not visible
+        if not self.isVisible():
+            return False
+
+        if not self._shader:
+            # We now misuse the platform shader, as it actually supports textures
+            self._shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "color.shader"))
+            self._shader.setUniformValue("u_color", Color(*Application.getInstance().getTheme().getColor("layerview_nozzle").getRgb()))
+            # Set the opacity to 0, so that the template is in full control.
+            self._shader.setUniformValue("u_opacity", 0)
+
+        if self.getMeshData():
+            renderer.queueNode(self, shader = self._shader, transparent = True)
+            return True

plugins/SimulationView/PathSlider.qml

@@ -0,0 +1,161 @@
+// Copyright (c) 2017 Ultimaker B.V.
+// Cura is released under the terms of the LGPLv3 or higher.
+
+import QtQuick 2.2
+import QtQuick.Controls 1.2
+import QtQuick.Layouts 1.1
+import QtQuick.Controls.Styles 1.1
+
+import UM 1.0 as UM
+import Cura 1.0 as Cura
+
+Item {
+    id: sliderRoot
+
+    // handle properties
+    property real handleSize: 10
+    property real handleRadius: handleSize / 2
+    property color handleColor: "black"
+    property color handleActiveColor: "white"
+    property color rangeColor: "black"
+    property real handleLabelWidth: width
+
+    // track properties
+    property real trackThickness: 4 // width of the slider track
+    property real trackRadius: trackThickness / 2
+    property color trackColor: "white"
+    property real trackBorderWidth: 1 // width of the slider track border
+    property color trackBorderColor: "black"
+
+    // value properties
+    property real maximumValue: 100
+    property bool roundValues: true
+    property real handleValue: maximumValue
+
+    property bool pathsVisible: true
+
+    function getHandleValueFromSliderHandle () {
+        return handle.getValue()
+    }
+
+    function setHandleValue (value) {
+        handle.setValue(value)
+        updateRangeHandle()
+    }
+
+    function updateRangeHandle () {
+        rangeHandle.width = handle.x - sliderRoot.handleSize
+    }
+
+    // slider track
+    Rectangle {
+        id: track
+
+        width: sliderRoot.width - sliderRoot.handleSize
+        height: sliderRoot.trackThickness
+        radius: sliderRoot.trackRadius
+        anchors.centerIn: sliderRoot
+        color: sliderRoot.trackColor
+        border.width: sliderRoot.trackBorderWidth
+        border.color: sliderRoot.trackBorderColor
+        visible: sliderRoot.pathsVisible
+    }
+
+    // Progress indicator
+    Item {
+        id: rangeHandle
+
+        x: handle.width
+        height: sliderRoot.handleSize
+        width: handle.x - sliderRoot.handleSize
+        anchors.verticalCenter: sliderRoot.verticalCenter
+        visible: sliderRoot.pathsVisible
+
+        Rectangle {
+            height: sliderRoot.trackThickness - 2 * sliderRoot.trackBorderWidth
+            width: parent.width + sliderRoot.handleSize
+            anchors.centerIn: parent
+            color: sliderRoot.rangeColor
+        }
+    }
+
+    // Handle
+    Rectangle {
+        id: handle
+
+        x: sliderRoot.handleSize
+        width: sliderRoot.handleSize
+        height: sliderRoot.handleSize
+        anchors.verticalCenter: sliderRoot.verticalCenter
+        radius: sliderRoot.handleRadius
+        color: handleLabel.activeFocus ? sliderRoot.handleActiveColor : sliderRoot.handleColor
+        visible: sliderRoot.pathsVisible
+
+        function onHandleDragged () {
+
+            // update the range handle
+            sliderRoot.updateRangeHandle()
+
+            // set the new value after moving the handle position
+            UM.SimulationView.setCurrentPath(getValue())
+        }
+
+        // get the value based on the slider position
+        function getValue () {
+            var result = x / (sliderRoot.width - sliderRoot.handleSize)
+            result = result * sliderRoot.maximumValue
+            result = sliderRoot.roundValues ? Math.round(result) : result
+            return result
+        }
+
+        // set the slider position based on the value
+        function setValue (value) {
+
+            UM.SimulationView.setCurrentPath(value)
+
+            var diff = value / sliderRoot.maximumValue
+            var newXPosition = Math.round(diff * (sliderRoot.width - sliderRoot.handleSize))
+            x = newXPosition
+
+            // update the range handle
+            sliderRoot.updateRangeHandle()
+        }
+
+        Keys.onRightPressed: handleLabel.setValue(handleLabel.value + ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
+        Keys.onLeftPressed: handleLabel.setValue(handleLabel.value - ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
+
+        // dragging
+        MouseArea {
+            anchors.fill: parent
+
+            drag {
+                target: parent
+                axis: Drag.XAxis
+                minimumX: 0
+                maximumX: sliderRoot.width - sliderRoot.handleSize
+            }
+            onPressed: {
+                handleLabel.forceActiveFocus()
+            }
+
+            onPositionChanged: parent.onHandleDragged()
+        }
+
+        SimulationSliderLabel {
+            id: handleLabel
+
+            height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
+            y: parent.y + sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
+            anchors.horizontalCenter: parent.horizontalCenter
+            target: Qt.point(x + width / 2, sliderRoot.height)
+            visible: false
+            startFrom: 0
+
+            // custom properties
+            maximumValue: sliderRoot.maximumValue
+            value: sliderRoot.handleValue
+            busy: UM.SimulationView.busy
+            setValue: handle.setValue // connect callback functions
+        }
+    }
+}

plugins/SimulationView/SimulationPass.py

@@ -0,0 +1,190 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM.Math.Color import Color
+from UM.Math.Vector import Vector
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
+from UM.Resources import Resources
+from UM.Scene.SceneNode import SceneNode
+from UM.Scene.ToolHandle import ToolHandle
+from UM.Application import Application
+from UM.PluginRegistry import PluginRegistry
+
+from UM.View.RenderPass import RenderPass
+from UM.View.RenderBatch import RenderBatch
+from UM.View.GL.OpenGL import OpenGL
+
+from cura.Settings.ExtruderManager import ExtruderManager
+
+
+import os.path
+
+## RenderPass used to display g-code paths.
+from .NozzleNode import NozzleNode
+
+
+class SimulationPass(RenderPass):
+    def __init__(self, width, height):
+        super().__init__("simulationview", width, height)
+
+        self._layer_shader = None
+        self._layer_shadow_shader = None
+        self._current_shader = None # This shader will be the shadow or the normal depending if the user wants to see the paths or the layers
+        self._tool_handle_shader = None
+        self._nozzle_shader = None
+        self._old_current_layer = 0
+        self._old_current_path = 0
+        self._switching_layers = True # It tracks when the user is moving the layers' slider
+        self._gl = OpenGL.getInstance().getBindingsObject()
+        self._scene = Application.getInstance().getController().getScene()
+        self._extruder_manager = ExtruderManager.getInstance()
+
+        self._layer_view = None
+        self._compatibility_mode = None
+
+    def setSimulationView(self, layerview):
+        self._layer_view = layerview
+        self._compatibility_mode = layerview.getCompatibilityMode()
+
+    def render(self):
+        if not self._layer_shader:
+            if self._compatibility_mode:
+                shader_filename = "layers.shader"
+                shadow_shader_filename = "layers_shadow.shader"
+            else:
+                shader_filename = "layers3d.shader"
+                shadow_shader_filename = "layers3d_shadow.shader"
+            self._layer_shader = OpenGL.getInstance().createShaderProgram(os.path.join(PluginRegistry.getInstance().getPluginPath("SimulationView"), shader_filename))
+            self._layer_shadow_shader = OpenGL.getInstance().createShaderProgram(os.path.join(PluginRegistry.getInstance().getPluginPath("SimulationView"), shadow_shader_filename))
+            self._current_shader = self._layer_shader
+        # Use extruder 0 if the extruder manager reports extruder index -1 (for single extrusion printers)
+        self._layer_shader.setUniformValue("u_active_extruder", float(max(0, self._extruder_manager.activeExtruderIndex)))
+        if self._layer_view:
+            self._layer_shader.setUniformValue("u_max_feedrate", self._layer_view.getMaxFeedrate())
+            self._layer_shader.setUniformValue("u_min_feedrate", self._layer_view.getMinFeedrate())
+            self._layer_shader.setUniformValue("u_max_thickness", self._layer_view.getMaxThickness())
+            self._layer_shader.setUniformValue("u_min_thickness", self._layer_view.getMinThickness())
+            self._layer_shader.setUniformValue("u_layer_view_type", self._layer_view.getSimulationViewType())
+            self._layer_shader.setUniformValue("u_extruder_opacity", self._layer_view.getExtruderOpacities())
+            self._layer_shader.setUniformValue("u_show_travel_moves", self._layer_view.getShowTravelMoves())
+            self._layer_shader.setUniformValue("u_show_helpers", self._layer_view.getShowHelpers())
+            self._layer_shader.setUniformValue("u_show_skin", self._layer_view.getShowSkin())
+            self._layer_shader.setUniformValue("u_show_infill", self._layer_view.getShowInfill())
+        else:
+            #defaults
+            self._layer_shader.setUniformValue("u_max_feedrate", 1)
+            self._layer_shader.setUniformValue("u_min_feedrate", 0)
+            self._layer_shader.setUniformValue("u_max_thickness", 1)
+            self._layer_shader.setUniformValue("u_min_thickness", 0)
+            self._layer_shader.setUniformValue("u_layer_view_type", 1)
+            self._layer_shader.setUniformValue("u_extruder_opacity", [1, 1, 1, 1])
+            self._layer_shader.setUniformValue("u_show_travel_moves", 0)
+            self._layer_shader.setUniformValue("u_show_helpers", 1)
+            self._layer_shader.setUniformValue("u_show_skin", 1)
+            self._layer_shader.setUniformValue("u_show_infill", 1)
+
+        if not self._tool_handle_shader:
+            self._tool_handle_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "toolhandle.shader"))
+
+        if not self._nozzle_shader:
+            self._nozzle_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "color.shader"))
+            self._nozzle_shader.setUniformValue("u_color", Color(*Application.getInstance().getTheme().getColor("layerview_nozzle").getRgb()))
+
+        self.bind()
+
+        tool_handle_batch = RenderBatch(self._tool_handle_shader, type = RenderBatch.RenderType.Overlay)
+        head_position = None  # Indicates the current position of the print head
+        nozzle_node = None
+
+        for node in DepthFirstIterator(self._scene.getRoot()):
+
+            if isinstance(node, ToolHandle):
+                tool_handle_batch.addItem(node.getWorldTransformation(), mesh = node.getSolidMesh())
+
+            elif isinstance(node, NozzleNode):
+                nozzle_node = node
+                nozzle_node.setVisible(False)
+
+            elif isinstance(node, SceneNode) and (node.getMeshData() or node.callDecoration("isBlockSlicing")) and node.isVisible():
+                layer_data = node.callDecoration("getLayerData")
+                if not layer_data:
+                    continue
+
+                # Render all layers below a certain number as line mesh instead of vertices.
+                if self._layer_view._current_layer_num > -1 and ((not self._layer_view._only_show_top_layers) or (not self._layer_view.getCompatibilityMode())):
+                    start = 0
+                    end = 0
+                    element_counts = layer_data.getElementCounts()
+                    for layer in sorted(element_counts.keys()):
+                        # In the current layer, we show just the indicated paths
+                        if layer == self._layer_view._current_layer_num:
+                            # We look for the position of the head, searching the point of the current path
+                            index = self._layer_view._current_path_num
+                            offset = 0
+                            for polygon in layer_data.getLayer(layer).polygons:
+                                # The size indicates all values in the two-dimension array, and the second dimension is
+                                # always size 3 because we have 3D points.
+                                if index >= polygon.data.size // 3 - offset:
+                                    index -= polygon.data.size // 3 - offset
+                                    offset = 1  # This is to avoid the first point when there is more than one polygon, since has the same value as the last point in the previous polygon
+                                    continue
+                                # The head position is calculated and translated
+                                head_position = Vector(polygon.data[index+offset][0], polygon.data[index+offset][1], polygon.data[index+offset][2]) + node.getWorldPosition()
+                                break
+                            break
+                        if self._layer_view._minimum_layer_num > layer:
+                            start += element_counts[layer]
+                        end += element_counts[layer]
+
+                    # Calculate the range of paths in the last layer
+                    current_layer_start = end
+                    current_layer_end = end + self._layer_view._current_path_num * 2 # Because each point is used twice
+
+                    # This uses glDrawRangeElements internally to only draw a certain range of lines.
+                    # All the layers but the current selected layer are rendered first
+                    if self._old_current_path != self._layer_view._current_path_num:
+                        self._current_shader = self._layer_shadow_shader
+                        self._switching_layers = False
+                    if not self._layer_view.isSimulationRunning() and self._old_current_layer != self._layer_view._current_layer_num:
+                        self._current_shader = self._layer_shader
+                        self._switching_layers = True
+
+                    layers_batch = RenderBatch(self._current_shader, type = RenderBatch.RenderType.Solid, mode = RenderBatch.RenderMode.Lines, range = (start, end))
+                    layers_batch.addItem(node.getWorldTransformation(), layer_data)
+                    layers_batch.render(self._scene.getActiveCamera())
+
+                    # Current selected layer is rendered
+                    current_layer_batch = RenderBatch(self._layer_shader, type = RenderBatch.RenderType.Solid, mode = RenderBatch.RenderMode.Lines, range = (current_layer_start, current_layer_end))
+                    current_layer_batch.addItem(node.getWorldTransformation(), layer_data)
+                    current_layer_batch.render(self._scene.getActiveCamera())
+
+                    self._old_current_layer = self._layer_view._current_layer_num
+                    self._old_current_path = self._layer_view._current_path_num
+
+                # Create a new batch that is not range-limited
+                batch = RenderBatch(self._layer_shader, type = RenderBatch.RenderType.Solid)
+
+                if self._layer_view.getCurrentLayerMesh():
+                    batch.addItem(node.getWorldTransformation(), self._layer_view.getCurrentLayerMesh())
+
+                if self._layer_view.getCurrentLayerJumps():
+                    batch.addItem(node.getWorldTransformation(), self._layer_view.getCurrentLayerJumps())
+
+                if len(batch.items) > 0:
+                    batch.render(self._scene.getActiveCamera())
+
+        # The nozzle is drawn when once we know the correct position of the head,
+        # but the user is not using the layer slider, and the compatibility mode is not enabled
+        if not self._switching_layers and not self._compatibility_mode and self._layer_view.getActivity() and nozzle_node is not None:
+            if head_position is not None:
+                nozzle_node.setVisible(True)
+                nozzle_node.setPosition(head_position)
+                nozzle_batch = RenderBatch(self._nozzle_shader, type = RenderBatch.RenderType.Transparent)
+                nozzle_batch.addItem(nozzle_node.getWorldTransformation(), mesh = nozzle_node.getMeshData())
+                nozzle_batch.render(self._scene.getActiveCamera())
+
+        # Render toolhandles on top of the layerview
+        if len(tool_handle_batch.items) > 0:
+            tool_handle_batch.render(self._scene.getActiveCamera())
+
+        self.release()

plugins/SimulationView/SimulationSliderLabel.qml

@@ -17,6 +17,7 @@ UM.PointingRectangle {
     property real value: 0
     property var setValue // Function
     property bool busy: false
+    property int startFrom: 1
 
     target: Qt.point(parent.width, y + height / 2)
     arrowSize: UM.Theme.getSize("default_arrow").width
@@ -48,12 +49,12 @@ UM.PointingRectangle {
 
         anchors {
             left: parent.left
-            leftMargin: UM.Theme.getSize("default_margin").width / 2
+            leftMargin: Math.floor(UM.Theme.getSize("default_margin").width / 2)
             verticalCenter: parent.verticalCenter
         }
 
         width: 40 * screenScaleFactor
-        text: sliderLabelRoot.value + 1 // the current handle value, add 1 because layers is an array
+        text: sliderLabelRoot.value + startFrom // the current handle value, add 1 because layers is an array
         horizontalAlignment: TextInput.AlignRight
 
         // key bindings, work when label is currenctly focused (active handle in LayerSlider)
@@ -74,14 +75,14 @@ UM.PointingRectangle {
             cursorPosition = 0
 
             if (valueLabel.text != "") {
-                // -1 because we need to convert back to an array structure
+                // -startFrom because we need to convert back to an array structure
-                sliderLabelRoot.setValue(parseInt(valueLabel.text) - 1)
+                sliderLabelRoot.setValue(parseInt(valueLabel.text) - startFrom)
             }
         }
 
         validator: IntValidator {
-            bottom: 1
+            bottom:startFrom
-            top: sliderLabelRoot.maximumValue + 1 // +1 because actual layers is an array
+            top: sliderLabelRoot.maximumValue + startFrom // +startFrom because maybe we want to start in a different value rather than 0
         }
     }
 
@@ -90,7 +91,7 @@ UM.PointingRectangle {
 
         anchors {
             left: parent.right
-            leftMargin: UM.Theme.getSize("default_margin").width / 2
+            leftMargin: Math.floor(UM.Theme.getSize("default_margin").width / 2)
             verticalCenter: parent.verticalCenter
         }
 

plugins/SimulationView/SimulationView.py

@@ -1,46 +1,46 @@
-# Copyright (c) 2015 Ultimaker B.V.
+# Copyright (c) 2017 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import sys
 
-from UM.PluginRegistry import PluginRegistry
-from UM.View.View import View
-from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
-from UM.Resources import Resources
-from UM.Event import Event, KeyEvent
-from UM.Signal import Signal
-from UM.Scene.Selection import Selection
-from UM.Math.Color import Color
-from UM.Mesh.MeshBuilder import MeshBuilder
-from UM.Job import Job
-from UM.Preferences import Preferences
-from UM.Logger import Logger
-from UM.View.GL.OpenGL import OpenGL
-from UM.Message import Message
-from UM.Application import Application
-from UM.View.GL.OpenGLContext import OpenGLContext
-
-from cura.ConvexHullNode import ConvexHullNode
-from cura.Settings.ExtruderManager import ExtruderManager
-
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QApplication
 
-from . import LayerViewProxy
+from UM.Application import Application
-
+from UM.Event import Event, KeyEvent
+from UM.Job import Job
+from UM.Logger import Logger
+from UM.Math.Color import Color
+from UM.Mesh.MeshBuilder import MeshBuilder
+from UM.Message import Message
+from UM.PluginRegistry import PluginRegistry
+from UM.Preferences import Preferences
+from UM.Resources import Resources
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
+from UM.Scene.Selection import Selection
+from UM.Signal import Signal
+from UM.View.GL.OpenGL import OpenGL
+from UM.View.GL.OpenGLContext import OpenGLContext
+from UM.View.View import View
 from UM.i18n import i18nCatalog
-catalog = i18nCatalog("cura")
+from cura.ConvexHullNode import ConvexHullNode
 
-from . import LayerPass
+from .NozzleNode import NozzleNode
+from .SimulationPass import SimulationPass
+from .SimulationViewProxy import SimulationViewProxy
+
+catalog = i18nCatalog("cura")
 
 import numpy
 import os.path
 
 ## View used to display g-code paths.
-class LayerView(View):
+class SimulationView(View):
-    # Must match LayerView.qml
+    # Must match SimulationView.qml
     LAYER_VIEW_TYPE_MATERIAL_TYPE = 0
     LAYER_VIEW_TYPE_LINE_TYPE = 1
+    LAYER_VIEW_TYPE_FEEDRATE = 2
+    LAYER_VIEW_TYPE_THICKNESS = 3
 
     def __init__(self):
         super().__init__()
@@ -54,22 +54,29 @@ class LayerView(View):
         self._activity = False
         self._old_max_layers = 0
 
+        self._max_paths = 0
+        self._current_path_num = 0
+        self._minimum_path_num = 0
+        self.currentLayerNumChanged.connect(self._onCurrentLayerNumChanged)
+
         self._busy = False
+        self._simulation_running = False
 
         self._ghost_shader = None
         self._layer_pass = None
         self._composite_pass = None
         self._old_layer_bindings = None
-        self._layerview_composite_shader = None
+        self._simulationview_composite_shader = None
         self._old_composite_shader = None
 
         self._global_container_stack = None
-        self._proxy = LayerViewProxy.LayerViewProxy()
+        self._proxy = SimulationViewProxy()
         self._controller.getScene().getRoot().childrenChanged.connect(self._onSceneChanged)
 
         self._resetSettings()
         self._legend_items = None
         self._show_travel_moves = False
+        self._nozzle_node = None
 
         Preferences.getInstance().addPreference("view/top_layer_count", 5)
         Preferences.getInstance().addPreference("view/only_show_top_layers", False)
@@ -91,7 +98,7 @@ class LayerView(View):
         self._compatibility_mode = True  # for safety
 
         self._wireprint_warning_message = Message(catalog.i18nc("@info:status", "Cura does not accurately display layers when Wire Printing is enabled"),
-                                                  title = catalog.i18nc("@info:title", "Layer View"))
+                                                  title = catalog.i18nc("@info:title", "Simulation View"))
 
     def _resetSettings(self):
         self._layer_view_type = 0  # 0 is material color, 1 is color by linetype, 2 is speed
@@ -101,18 +108,24 @@ class LayerView(View):
         self._show_helpers = 1
         self._show_skin = 1
         self._show_infill = 1
+        self.resetLayerData()
 
     def getActivity(self):
         return self._activity
 
-    def getLayerPass(self):
+    def setActivity(self, activity):
+        if self._activity == activity:
+            return
+        self._activity = activity
+        self.activityChanged.emit()
+
+    def getSimulationPass(self):
         if not self._layer_pass:
             # Currently the RenderPass constructor requires a size > 0
             # This should be fixed in RenderPass's constructor.
-            self._layer_pass = LayerPass.LayerPass(1, 1)
+            self._layer_pass = SimulationPass(1, 1)
             self._compatibility_mode = OpenGLContext.isLegacyOpenGL() or bool(Preferences.getInstance().getValue("view/force_layer_view_compatibility_mode"))
-            self._layer_pass.setLayerView(self)
+            self._layer_pass.setSimulationView(self)
-            self.getRenderer().addRenderPass(self._layer_pass)
         return self._layer_pass
 
     def getCurrentLayer(self):
@@ -121,13 +134,26 @@ class LayerView(View):
     def getMinimumLayer(self):
         return self._minimum_layer_num
 
-    def _onSceneChanged(self, node):
-        self.calculateMaxLayers()
-
     def getMaxLayers(self):
         return self._max_layers
 
-    busyChanged = Signal()
+    def getCurrentPath(self):
+        return self._current_path_num
+
+    def getMinimumPath(self):
+        return self._minimum_path_num
+
+    def getMaxPaths(self):
+        return self._max_paths
+
+    def getNozzleNode(self):
+        if not self._nozzle_node:
+            self._nozzle_node = NozzleNode()
+        return self._nozzle_node
+
+    def _onSceneChanged(self, node):
+        self.setActivity(False)
+        self.calculateMaxLayers()
 
     def isBusy(self):
         return self._busy
@@ -137,9 +163,19 @@ class LayerView(View):
             self._busy = busy
             self.busyChanged.emit()
 
+    def isSimulationRunning(self):
+        return self._simulation_running
+
+    def setSimulationRunning(self, running):
+        self._simulation_running = running
+
     def resetLayerData(self):
         self._current_layer_mesh = None
         self._current_layer_jumps = None
+        self._max_feedrate = sys.float_info.min
+        self._min_feedrate = sys.float_info.max
+        self._max_thickness = sys.float_info.min
+        self._min_thickness = sys.float_info.max
 
     def beginRendering(self):
         scene = self.getController().getScene()
@@ -187,15 +223,43 @@ class LayerView(View):
 
             self.currentLayerNumChanged.emit()
 
+    def setPath(self, value):
+        if self._current_path_num != value:
+            self._current_path_num = value
+            if self._current_path_num < 0:
+                self._current_path_num = 0
+            if self._current_path_num > self._max_paths:
+                self._current_path_num = self._max_paths
+            if self._current_path_num < self._minimum_path_num:
+                self._minimum_path_num = self._current_path_num
+
+            self._startUpdateTopLayers()
+
+            self.currentPathNumChanged.emit()
+
+    def setMinimumPath(self, value):
+        if self._minimum_path_num != value:
+            self._minimum_path_num = value
+            if self._minimum_path_num < 0:
+                self._minimum_path_num = 0
+            if self._minimum_path_num > self._max_layers:
+                self._minimum_path_num = self._max_layers
+            if self._minimum_path_num > self._current_path_num:
+                self._current_path_num = self._minimum_path_num
+
+            self._startUpdateTopLayers()
+
+            self.currentPathNumChanged.emit()
+
     ##  Set the layer view type
     #
-    #   \param layer_view_type integer as in LayerView.qml and this class
+    #   \param layer_view_type integer as in SimulationView.qml and this class
-    def setLayerViewType(self, layer_view_type):
+    def setSimulationViewType(self, layer_view_type):
         self._layer_view_type = layer_view_type
         self.currentLayerNumChanged.emit()
 
-    ##  Return the layer view type, integer as in LayerView.qml and this class
+    ##  Return the layer view type, integer as in SimulationView.qml and this class
-    def getLayerViewType(self):
+    def getSimulationViewType(self):
         return self._layer_view_type
 
     ##  Set the extruder opacity
@@ -244,9 +308,20 @@ class LayerView(View):
     def getExtruderCount(self):
         return self._extruder_count
 
+    def getMinFeedrate(self):
+        return self._min_feedrate
+
+    def getMaxFeedrate(self):
+        return self._max_feedrate
+
+    def getMinThickness(self):
+        return self._min_thickness
+
+    def getMaxThickness(self):
+        return self._max_thickness
+
     def calculateMaxLayers(self):
         scene = self.getController().getScene()
-        self._activity = True
 
         self._old_max_layers = self._max_layers
         ## Recalculate num max layers
@@ -256,9 +331,16 @@ class LayerView(View):
             if not layer_data:
                 continue
 
+            self.setActivity(True)
             min_layer_number = sys.maxsize
             max_layer_number = -sys.maxsize
             for layer_id in layer_data.getLayers():
+                # Store the max and min feedrates and thicknesses for display purposes
+                for p in layer_data.getLayer(layer_id).polygons:
+                    self._max_feedrate = max(float(p.lineFeedrates.max()), self._max_feedrate)
+                    self._min_feedrate = min(float(p.lineFeedrates.min()), self._min_feedrate)
+                    self._max_thickness = max(float(p.lineThicknesses.max()), self._max_thickness)
+                    self._min_thickness = min(float(p.lineThicknesses.min()), self._min_thickness)
                 if max_layer_number < layer_id:
                     max_layer_number = layer_id
                 if min_layer_number > layer_id:
@@ -282,10 +364,32 @@ class LayerView(View):
                 self.maxLayersChanged.emit()
         self._startUpdateTopLayers()
 
+    def calculateMaxPathsOnLayer(self, layer_num):
+        # Update the currentPath
+        scene = self.getController().getScene()
+        for node in DepthFirstIterator(scene.getRoot()):
+            layer_data = node.callDecoration("getLayerData")
+            if not layer_data:
+                continue
+
+            layer = layer_data.getLayer(layer_num)
+            if layer is None:
+                return
+            new_max_paths = layer.lineMeshElementCount()
+            if new_max_paths >= 0 and new_max_paths != self._max_paths:
+                self._max_paths = new_max_paths
+                self.maxPathsChanged.emit()
+
+            self.setPath(int(new_max_paths))
+
     maxLayersChanged = Signal()
+    maxPathsChanged = Signal()
     currentLayerNumChanged = Signal()
+    currentPathNumChanged = Signal()
     globalStackChanged = Signal()
     preferencesChanged = Signal()
+    busyChanged = Signal()
+    activityChanged = Signal()
 
     ##  Hackish way to ensure the proxy is already created, which ensures that the layerview.qml is already created
     #   as this caused some issues.
@@ -309,25 +413,31 @@ class LayerView(View):
                 return True
 
         if event.type == Event.ViewActivateEvent:
-            # Make sure the LayerPass is created
+            # Make sure the SimulationPass is created
-            self.getLayerPass()
+            layer_pass = self.getSimulationPass()
+            self.getRenderer().addRenderPass(layer_pass)
+
+            # Make sure the NozzleNode is add to the root
+            nozzle = self.getNozzleNode()
+            nozzle.setParent(self.getController().getScene().getRoot())
+            nozzle.setVisible(False)
 
             Application.getInstance().globalContainerStackChanged.connect(self._onGlobalStackChanged)
             self._onGlobalStackChanged()
 
-            if not self._layerview_composite_shader:
+            if not self._simulationview_composite_shader:
-                self._layerview_composite_shader = OpenGL.getInstance().createShaderProgram(os.path.join(PluginRegistry.getInstance().getPluginPath("LayerView"), "layerview_composite.shader"))
+                self._simulationview_composite_shader = OpenGL.getInstance().createShaderProgram(os.path.join(PluginRegistry.getInstance().getPluginPath("SimulationView"), "simulationview_composite.shader"))
                 theme = Application.getInstance().getTheme()
-                self._layerview_composite_shader.setUniformValue("u_background_color", Color(*theme.getColor("viewport_background").getRgb()))
+                self._simulationview_composite_shader.setUniformValue("u_background_color", Color(*theme.getColor("viewport_background").getRgb()))
-                self._layerview_composite_shader.setUniformValue("u_outline_color", Color(*theme.getColor("model_selection_outline").getRgb()))
+                self._simulationview_composite_shader.setUniformValue("u_outline_color", Color(*theme.getColor("model_selection_outline").getRgb()))
 
             if not self._composite_pass:
                 self._composite_pass = self.getRenderer().getRenderPass("composite")
 
             self._old_layer_bindings = self._composite_pass.getLayerBindings()[:] # make a copy so we can restore to it later
-            self._composite_pass.getLayerBindings().append("layerview")
+            self._composite_pass.getLayerBindings().append("simulationview")
             self._old_composite_shader = self._composite_pass.getCompositeShader()
-            self._composite_pass.setCompositeShader(self._layerview_composite_shader)
+            self._composite_pass.setCompositeShader(self._simulationview_composite_shader)
 
         elif event.type == Event.ViewDeactivateEvent:
             self._wireprint_warning_message.hide()
@@ -335,6 +445,8 @@ class LayerView(View):
             if self._global_container_stack:
                 self._global_container_stack.propertyChanged.disconnect(self._onPropertyChanged)
 
+            self._nozzle_node.setParent(None)
+            self.getRenderer().removeRenderPass(self._layer_pass)
             self._composite_pass.setLayerBindings(self._old_layer_bindings)
             self._composite_pass.setCompositeShader(self._old_composite_shader)
 
@@ -363,6 +475,9 @@ class LayerView(View):
             else:
                 self._wireprint_warning_message.hide()
 
+    def _onCurrentLayerNumChanged(self):
+        self.calculateMaxPathsOnLayer(self._current_layer_num)
+
     def _startUpdateTopLayers(self):
         if not self._compatibility_mode:
             return
@@ -396,7 +511,7 @@ class LayerView(View):
         self._compatibility_mode = OpenGLContext.isLegacyOpenGL() or bool(
             Preferences.getInstance().getValue("view/force_layer_view_compatibility_mode"))
 
-        self.setLayerViewType(int(float(Preferences.getInstance().getValue("layerview/layer_view_type"))));
+        self.setSimulationViewType(int(float(Preferences.getInstance().getValue("layerview/layer_view_type"))));
 
         for extruder_nr, extruder_opacity in enumerate(Preferences.getInstance().getValue("layerview/extruder_opacities").split("|")):
             try:

plugins/SimulationView/SimulationView.qml

@@ -0,0 +1,707 @@
+// Copyright (c) 2017 Ultimaker B.V.
+// Cura is released under the terms of the LGPLv3 or higher.
+
+import QtQuick 2.4
+import QtQuick.Controls 1.2
+import QtQuick.Layouts 1.1
+import QtQuick.Controls.Styles 1.1
+
+import UM 1.0 as UM
+import Cura 1.0 as Cura
+
+Item
+{
+    id: base
+    width: {
+        if (UM.SimulationView.compatibilityMode) {
+            return UM.Theme.getSize("layerview_menu_size_compatibility").width;
+        } else {
+            return UM.Theme.getSize("layerview_menu_size").width;
+        }
+    }
+    height: {
+        if (viewSettings.collapsed) {
+            if (UM.SimulationView.compatibilityMode) {
+                return UM.Theme.getSize("layerview_menu_size_compatibility_collapsed").height;
+            }
+            return UM.Theme.getSize("layerview_menu_size_collapsed").height;
+        } else if (UM.SimulationView.compatibilityMode) {
+            return UM.Theme.getSize("layerview_menu_size_compatibility").height;
+        } else if (UM.Preferences.getValue("layerview/layer_view_type") == 0) {
+            return UM.Theme.getSize("layerview_menu_size_material_color_mode").height + UM.SimulationView.extruderCount * (UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("layerview_row_spacing").height)
+        } else {
+            return UM.Theme.getSize("layerview_menu_size").height + UM.SimulationView.extruderCount * (UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("layerview_row_spacing").height)
+        }
+    }
+    Behavior on height { NumberAnimation { duration: 100 } }
+
+    property var buttonTarget: {
+        if(parent != null)
+        {
+            var force_binding = parent.y; // ensure this gets reevaluated when the panel moves
+            return base.mapFromItem(parent.parent, parent.buttonTarget.x, parent.buttonTarget.y)
+        }
+        return Qt.point(0,0)
+    }
+
+    visible: parent != null ? !parent.parent.monitoringPrint: true
+
+    Rectangle {
+        id: layerViewMenu
+        anchors.right: parent.right
+        anchors.top: parent.top
+        width: parent.width
+        height: parent.height
+        clip: true
+        z: layerSlider.z - 1
+        color: UM.Theme.getColor("tool_panel_background")
+        border.width: UM.Theme.getSize("default_lining").width
+        border.color: UM.Theme.getColor("lining")
+
+        Button {
+            id: collapseButton
+            anchors.top: parent.top
+            anchors.topMargin: Math.floor(UM.Theme.getSize("default_margin").height + (UM.Theme.getSize("layerview_row").height - UM.Theme.getSize("default_margin").height) / 2)
+            anchors.right: parent.right
+            anchors.rightMargin: UM.Theme.getSize("default_margin").width
+
+            width: UM.Theme.getSize("standard_arrow").width
+            height: UM.Theme.getSize("standard_arrow").height
+
+            onClicked: viewSettings.collapsed = !viewSettings.collapsed
+
+            style: ButtonStyle
+            {
+                background: UM.RecolorImage
+                {
+                    width: control.width
+                    height: control.height
+                    sourceSize.width: width
+                    sourceSize.height: width
+                    color:  UM.Theme.getColor("setting_control_text")
+                    source: viewSettings.collapsed ? UM.Theme.getIcon("arrow_left") : UM.Theme.getIcon("arrow_bottom")
+                }
+                label: Label{ }
+            }
+        }
+
+        ColumnLayout {
+            id: viewSettings
+
+            property bool collapsed: false
+            property var extruder_opacities: UM.Preferences.getValue("layerview/extruder_opacities").split("|")
+            property bool show_travel_moves: UM.Preferences.getValue("layerview/show_travel_moves")
+            property bool show_helpers: UM.Preferences.getValue("layerview/show_helpers")
+            property bool show_skin: UM.Preferences.getValue("layerview/show_skin")
+            property bool show_infill: UM.Preferences.getValue("layerview/show_infill")
+            // if we are in compatibility mode, we only show the "line type"
+            property bool show_legend: UM.SimulationView.compatibilityMode ? true : UM.Preferences.getValue("layerview/layer_view_type") == 1
+            property bool show_gradient: UM.SimulationView.compatibilityMode ? false : UM.Preferences.getValue("layerview/layer_view_type") == 2 || UM.Preferences.getValue("layerview/layer_view_type") == 3
+            property bool show_feedrate_gradient: show_gradient && UM.Preferences.getValue("layerview/layer_view_type") == 2
+            property bool show_thickness_gradient: show_gradient && UM.Preferences.getValue("layerview/layer_view_type") == 3
+            property bool only_show_top_layers: UM.Preferences.getValue("view/only_show_top_layers")
+            property int top_layer_count: UM.Preferences.getValue("view/top_layer_count")
+
+            anchors.top: parent.top
+            anchors.topMargin: UM.Theme.getSize("default_margin").height
+            anchors.left: parent.left
+            anchors.leftMargin: UM.Theme.getSize("default_margin").width
+            anchors.right: parent.right
+            anchors.rightMargin: UM.Theme.getSize("default_margin").width
+            spacing: UM.Theme.getSize("layerview_row_spacing").height
+
+            Label
+            {
+                id: layerViewTypesLabel
+                anchors.left: parent.left
+                text: catalog.i18nc("@label","Color scheme")
+                font: UM.Theme.getFont("default");
+                visible: !UM.SimulationView.compatibilityMode
+                Layout.fillWidth: true
+                color: UM.Theme.getColor("setting_control_text")
+            }
+
+            ListModel  // matches SimulationView.py
+            {
+                id: layerViewTypes
+            }
+
+            Component.onCompleted:
+            {
+                layerViewTypes.append({
+                    text: catalog.i18nc("@label:listbox", "Material Color"),
+                    type_id: 0
+                })
+                layerViewTypes.append({
+                    text: catalog.i18nc("@label:listbox", "Line Type"),
+                    type_id: 1
+                })
+                layerViewTypes.append({
+                    text: catalog.i18nc("@label:listbox", "Feedrate"),
+                    type_id: 2
+                })
+                layerViewTypes.append({
+                    text: catalog.i18nc("@label:listbox", "Layer thickness"),
+                    type_id: 3  // these ids match the switching in the shader
+                })
+            }
+
+            ComboBox
+            {
+                id: layerTypeCombobox
+                anchors.left: parent.left
+                Layout.fillWidth: true
+                Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
+                model: layerViewTypes
+                visible: !UM.SimulationView.compatibilityMode
+                style: UM.Theme.styles.combobox
+                anchors.right: parent.right
+
+                onActivated:
+                {
+                    UM.Preferences.setValue("layerview/layer_view_type", index);
+                }
+
+                Component.onCompleted:
+                {
+                    currentIndex = UM.SimulationView.compatibilityMode ? 1 : UM.Preferences.getValue("layerview/layer_view_type");
+                    updateLegends(currentIndex);
+                }
+
+                function updateLegends(type_id)
+                {
+                    // update visibility of legends
+                    viewSettings.show_legend = UM.SimulationView.compatibilityMode || (type_id == 1);
+                    viewSettings.show_gradient = !UM.SimulationView.compatibilityMode && (type_id == 2 || type_id == 3);
+                    viewSettings.show_feedrate_gradient = viewSettings.show_gradient && (type_id == 2);
+                    viewSettings.show_thickness_gradient = viewSettings.show_gradient && (type_id == 3);
+                }
+
+            }
+
+            Label
+            {
+                id: compatibilityModeLabel
+                anchors.left: parent.left
+                text: catalog.i18nc("@label","Compatibility Mode")
+                font: UM.Theme.getFont("default")
+                color: UM.Theme.getColor("text")
+                visible: UM.SimulationView.compatibilityMode
+                Layout.fillWidth: true
+                Layout.preferredHeight: UM.Theme.getSize("layerview_row").height
+                Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
+            }
+
+            Item
+            {
+                height: Math.floor(UM.Theme.getSize("default_margin").width / 2)
+                width: width
+            }
+
+            Connections {
+                target: UM.Preferences
+                onPreferenceChanged:
+                {
+                    layerTypeCombobox.currentIndex = UM.SimulationView.compatibilityMode ? 1 : UM.Preferences.getValue("layerview/layer_view_type");
+                    layerTypeCombobox.updateLegends(layerTypeCombobox.currentIndex);
+                    playButton.pauseSimulation();
+                    viewSettings.extruder_opacities = UM.Preferences.getValue("layerview/extruder_opacities").split("|");
+                    viewSettings.show_travel_moves = UM.Preferences.getValue("layerview/show_travel_moves");
+                    viewSettings.show_helpers = UM.Preferences.getValue("layerview/show_helpers");
+                    viewSettings.show_skin = UM.Preferences.getValue("layerview/show_skin");
+                    viewSettings.show_infill = UM.Preferences.getValue("layerview/show_infill");
+                    viewSettings.only_show_top_layers = UM.Preferences.getValue("view/only_show_top_layers");
+                    viewSettings.top_layer_count = UM.Preferences.getValue("view/top_layer_count");
+                }
+            }
+
+            Repeater {
+                model: Cura.ExtrudersModel{}
+                CheckBox {
+                    id: extrudersModelCheckBox
+                    checked: viewSettings.extruder_opacities[index] > 0.5 || viewSettings.extruder_opacities[index] == undefined || viewSettings.extruder_opacities[index] == ""
+                    onClicked: {
+                        viewSettings.extruder_opacities[index] = checked ? 1.0 : 0.0
+                        UM.Preferences.setValue("layerview/extruder_opacities", viewSettings.extruder_opacities.join("|"));
+                    }
+                    visible: !UM.SimulationView.compatibilityMode
+                    enabled: index + 1 <= 4
+                    Rectangle {
+                        anchors.verticalCenter: parent.verticalCenter
+                        anchors.right: extrudersModelCheckBox.right
+                        width: UM.Theme.getSize("layerview_legend_size").width
+                        height: UM.Theme.getSize("layerview_legend_size").height
+                        color: model.color
+                        radius: width / 2
+                        border.width: UM.Theme.getSize("default_lining").width
+                        border.color: UM.Theme.getColor("lining")
+                        visible: !viewSettings.show_legend & !viewSettings.show_gradient
+                    }
+                    Layout.fillWidth: true
+                    Layout.preferredHeight: UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("default_lining").height
+                    Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
+                    style: UM.Theme.styles.checkbox
+                    Label
+                    {
+                        text: model.name
+                        elide: Text.ElideRight
+                        color: UM.Theme.getColor("setting_control_text")
+                        font: UM.Theme.getFont("default")
+                        anchors.verticalCenter: parent.verticalCenter
+                        anchors.left: extrudersModelCheckBox.left;
+                        anchors.right: extrudersModelCheckBox.right;
+                        anchors.leftMargin: UM.Theme.getSize("checkbox").width + UM.Theme.getSize("default_margin").width /2
+                        anchors.rightMargin: UM.Theme.getSize("default_margin").width * 2
+                    }
+                }
+            }
+
+            Repeater {
+                model: ListModel {
+                    id: typesLegendModel
+                    Component.onCompleted:
+                    {
+                        typesLegendModel.append({
+                            label: catalog.i18nc("@label", "Show Travels"),
+                            initialValue: viewSettings.show_travel_moves,
+                            preference: "layerview/show_travel_moves",
+                            colorId:  "layerview_move_combing"
+                        });
+                        typesLegendModel.append({
+                            label: catalog.i18nc("@label", "Show Helpers"),
+                            initialValue: viewSettings.show_helpers,
+                            preference: "layerview/show_helpers",
+                            colorId:  "layerview_support"
+                        });
+                        typesLegendModel.append({
+                            label: catalog.i18nc("@label", "Show Shell"),
+                            initialValue: viewSettings.show_skin,
+                            preference: "layerview/show_skin",
+                            colorId:  "layerview_inset_0"
+                        });
+                        typesLegendModel.append({
+                            label: catalog.i18nc("@label", "Show Infill"),
+                            initialValue: viewSettings.show_infill,
+                            preference: "layerview/show_infill",
+                            colorId:  "layerview_infill"
+                        });
+                    }
+                }
+
+                CheckBox {
+                    id: legendModelCheckBox
+                    checked: model.initialValue
+                    onClicked: {
+                        UM.Preferences.setValue(model.preference, checked);
+                    }
+                    Rectangle {
+                        anchors.verticalCenter: parent.verticalCenter
+                        anchors.right: legendModelCheckBox.right
+                        width: UM.Theme.getSize("layerview_legend_size").width
+                        height: UM.Theme.getSize("layerview_legend_size").height
+                        color: UM.Theme.getColor(model.colorId)
+                        border.width: UM.Theme.getSize("default_lining").width
+                        border.color: UM.Theme.getColor("lining")
+                        visible: viewSettings.show_legend
+                    }
+                    Layout.fillWidth: true
+                    Layout.preferredHeight: UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("default_lining").height
+                    Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
+                    style: UM.Theme.styles.checkbox
+                    Label
+                    {
+                        text: label
+                        font: UM.Theme.getFont("default")
+                        elide: Text.ElideRight
+                        color: UM.Theme.getColor("setting_control_text")
+                        anchors.verticalCenter: parent.verticalCenter
+                        anchors.left: legendModelCheckBox.left;
+                        anchors.right: legendModelCheckBox.right;
+                        anchors.leftMargin: UM.Theme.getSize("checkbox").width + UM.Theme.getSize("default_margin").width /2
+                        anchors.rightMargin: UM.Theme.getSize("default_margin").width * 2
+                    }
+                }
+            }
+
+            CheckBox {
+                checked: viewSettings.only_show_top_layers
+                onClicked: {
+                    UM.Preferences.setValue("view/only_show_top_layers", checked ? 1.0 : 0.0);
+                }
+                text: catalog.i18nc("@label", "Only Show Top Layers")
+                visible: UM.SimulationView.compatibilityMode
+                style: UM.Theme.styles.checkbox
+            }
+            CheckBox {
+                checked: viewSettings.top_layer_count == 5
+                onClicked: {
+                    UM.Preferences.setValue("view/top_layer_count", checked ? 5 : 1);
+                }
+                text: catalog.i18nc("@label", "Show 5 Detailed Layers On Top")
+                visible: UM.SimulationView.compatibilityMode
+                style: UM.Theme.styles.checkbox
+            }
+
+            Repeater {
+                model: ListModel {
+                    id: typesLegendModelNoCheck
+                    Component.onCompleted:
+                    {
+                        typesLegendModelNoCheck.append({
+                            label: catalog.i18nc("@label", "Top / Bottom"),
+                            colorId: "layerview_skin",
+                        });
+                        typesLegendModelNoCheck.append({
+                            label: catalog.i18nc("@label", "Inner Wall"),
+                            colorId: "layerview_inset_x",
+                        });
+                    }
+                }
+
+                Label {
+                    text: label
+                    visible: viewSettings.show_legend
+                    id: typesLegendModelLabel
+                    Rectangle {
+                        anchors.verticalCenter: parent.verticalCenter
+                        anchors.right: typesLegendModelLabel.right
+                        width: UM.Theme.getSize("layerview_legend_size").width
+                        height: UM.Theme.getSize("layerview_legend_size").height
+                        color: UM.Theme.getColor(model.colorId)
+                        border.width: UM.Theme.getSize("default_lining").width
+                        border.color: UM.Theme.getColor("lining")
+                        visible: viewSettings.show_legend
+                    }
+                    Layout.fillWidth: true
+                    Layout.preferredHeight: UM.Theme.getSize("layerview_row").height + UM.Theme.getSize("default_lining").height
+                    Layout.preferredWidth: UM.Theme.getSize("layerview_row").width
+                    color: UM.Theme.getColor("setting_control_text")
+                    font: UM.Theme.getFont("default")
+                }
+            }
+
+            // Text for the minimum, maximum and units for the feedrates and layer thickness
+            Item {
+                id: gradientLegend
+                visible: viewSettings.show_gradient
+                width: parent.width
+                height: UM.Theme.getSize("layerview_row").height
+                anchors {
+                    topMargin: UM.Theme.getSize("slider_layerview_margin").height
+                    horizontalCenter: parent.horizontalCenter
+                }
+
+                Label {
+                    text: minText()
+                    anchors.left: parent.left
+                    color: UM.Theme.getColor("setting_control_text")
+                    font: UM.Theme.getFont("default")
+
+                    function minText() {
+                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity) {
+                            // Feedrate selected
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2) {
+                                return parseFloat(UM.SimulationView.getMinFeedrate()).toFixed(2)
+                            }
+                            // Layer thickness selected
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3) {
+                                return parseFloat(UM.SimulationView.getMinThickness()).toFixed(2)
+                            }
+                        }
+                        return catalog.i18nc("@label","min")
+                    }
+                }
+
+                Label {
+                    text: unitsText()
+                    anchors.horizontalCenter: parent.horizontalCenter
+                    color: UM.Theme.getColor("setting_control_text")
+                    font: UM.Theme.getFont("default")
+
+                    function unitsText() {
+                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity) {
+                            // Feedrate selected
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2) {
+                                return "mm/s"
+                            }
+                            // Layer thickness selected
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3) {
+                                return "mm"
+                            }
+                        }
+                        return ""
+                    }
+                }
+
+                Label {
+                    text: maxText()
+                    anchors.right: parent.right
+                    color: UM.Theme.getColor("setting_control_text")
+                    font: UM.Theme.getFont("default")
+
+                    function maxText() {
+                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity) {
+                            // Feedrate selected
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2) {
+                                return parseFloat(UM.SimulationView.getMaxFeedrate()).toFixed(2)
+                            }
+                            // Layer thickness selected
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3) {
+                                return parseFloat(UM.SimulationView.getMaxThickness()).toFixed(2)
+                            }
+                        }
+                        return catalog.i18nc("@label","max")
+                    }
+                }
+            }
+
+            // Gradient colors for feedrate
+            Rectangle { // In QML 5.9 can be changed by LinearGradient
+                // Invert values because then the bar is rotated 90 degrees
+                id: feedrateGradient
+                visible: viewSettings.show_feedrate_gradient
+                anchors.left: parent.right
+                height: parent.width
+                width: UM.Theme.getSize("layerview_row").height * 1.5
+                border.width: UM.Theme.getSize("default_lining").width
+                border.color: UM.Theme.getColor("lining")
+                transform: Rotation {origin.x: 0; origin.y: 0; angle: 90}
+                gradient: Gradient {
+                    GradientStop {
+                        position: 0.000
+                        color: Qt.rgba(1, 0.5, 0, 1)
+                    }
+                    GradientStop {
+                        position: 0.625
+                        color: Qt.rgba(0.375, 0.5, 0, 1)
+                    }
+                    GradientStop {
+                        position: 0.75
+                        color: Qt.rgba(0.25, 1, 0, 1)
+                    }
+                    GradientStop {
+                        position: 1.0
+                        color: Qt.rgba(0, 0, 1, 1)
+                    }
+                }
+            }
+
+            // Gradient colors for layer thickness
+            Rectangle { // In QML 5.9 can be changed by LinearGradient
+                // Invert values because then the bar is rotated 90 degrees
+                id: thicknessGradient
+                visible: viewSettings.show_thickness_gradient
+                anchors.left: parent.right
+                height: parent.width
+                width: UM.Theme.getSize("layerview_row").height * 1.5
+                border.width: UM.Theme.getSize("default_lining").width
+                border.color: UM.Theme.getColor("lining")
+                transform: Rotation {origin.x: 0; origin.y: 0; angle: 90}
+                gradient: Gradient {
+                    GradientStop {
+                        position: 0.000
+                        color: Qt.rgba(1, 0, 0, 1)
+                    }
+                    GradientStop {
+                        position: 0.25
+                        color: Qt.rgba(0.5, 0.5, 0, 1)
+                    }
+                    GradientStop {
+                        position: 0.5
+                        color: Qt.rgba(0, 1, 0, 1)
+                    }
+                    GradientStop {
+                        position: 0.75
+                        color: Qt.rgba(0, 0.5, 0.5, 1)
+                    }
+                    GradientStop {
+                        position: 1.0
+                        color: Qt.rgba(0, 0, 1, 1)
+                    }
+                }
+            }
+        }
+    }
+
+    Item {
+        id: slidersBox
+
+        width: parent.width
+        visible: UM.SimulationView.layerActivity && CuraApplication.platformActivity
+
+        anchors {
+            top: parent.bottom
+            topMargin: UM.Theme.getSize("slider_layerview_margin").height
+            left: parent.left
+        }
+
+        PathSlider {
+            id: pathSlider
+
+            height: UM.Theme.getSize("slider_handle").width
+            anchors.left: playButton.right
+            anchors.leftMargin: UM.Theme.getSize("default_margin").width
+            anchors.right: parent.right
+            visible: !UM.SimulationView.compatibilityMode
+
+            // custom properties
+            handleValue: UM.SimulationView.currentPath
+            maximumValue: UM.SimulationView.numPaths
+            handleSize: UM.Theme.getSize("slider_handle").width
+            trackThickness: UM.Theme.getSize("slider_groove").width
+            trackColor: UM.Theme.getColor("slider_groove")
+            trackBorderColor: UM.Theme.getColor("slider_groove_border")
+            handleColor: UM.Theme.getColor("slider_handle")
+            handleActiveColor: UM.Theme.getColor("slider_handle_active")
+            rangeColor: UM.Theme.getColor("slider_groove_fill")
+
+            // update values when layer data changes
+            Connections {
+                target: UM.SimulationView
+                onMaxPathsChanged: pathSlider.setHandleValue(UM.SimulationView.currentPath)
+                onCurrentPathChanged: pathSlider.setHandleValue(UM.SimulationView.currentPath)
+            }
+
+            // make sure the slider handlers show the correct value after switching views
+            Component.onCompleted: {
+                pathSlider.setHandleValue(UM.SimulationView.currentPath)
+            }
+        }
+
+        LayerSlider {
+            id: layerSlider
+
+            width: UM.Theme.getSize("slider_handle").width
+            height: UM.Theme.getSize("layerview_menu_size").height
+
+            anchors {
+                top: !UM.SimulationView.compatibilityMode ? pathSlider.bottom : parent.top
+                topMargin: !UM.SimulationView.compatibilityMode ? UM.Theme.getSize("default_margin").height : 0
+                right: parent.right
+                rightMargin: UM.Theme.getSize("slider_layerview_margin").width
+            }
+
+            // custom properties
+            upperValue: UM.SimulationView.currentLayer
+            lowerValue: UM.SimulationView.minimumLayer
+            maximumValue: UM.SimulationView.numLayers
+            handleSize: UM.Theme.getSize("slider_handle").width
+            trackThickness: UM.Theme.getSize("slider_groove").width
+            trackColor: UM.Theme.getColor("slider_groove")
+            trackBorderColor: UM.Theme.getColor("slider_groove_border")
+            upperHandleColor: UM.Theme.getColor("slider_handle")
+            lowerHandleColor: UM.Theme.getColor("slider_handle")
+            rangeHandleColor: UM.Theme.getColor("slider_groove_fill")
+            handleActiveColor: UM.Theme.getColor("slider_handle_active")
+            handleLabelWidth: UM.Theme.getSize("slider_layerview_background").width
+
+            // update values when layer data changes
+            Connections {
+                target: UM.SimulationView
+                onMaxLayersChanged: layerSlider.setUpperValue(UM.SimulationView.currentLayer)
+                onMinimumLayerChanged: layerSlider.setLowerValue(UM.SimulationView.minimumLayer)
+                onCurrentLayerChanged: layerSlider.setUpperValue(UM.SimulationView.currentLayer)
+            }
+
+            // make sure the slider handlers show the correct value after switching views
+            Component.onCompleted: {
+                layerSlider.setLowerValue(UM.SimulationView.minimumLayer)
+                layerSlider.setUpperValue(UM.SimulationView.currentLayer)
+            }
+        }
+
+        // Play simulation button
+        Button {
+            id: playButton
+            iconSource: "./resources/simulation_resume.svg"
+            style: UM.Theme.styles.small_tool_button
+            visible: !UM.SimulationView.compatibilityMode
+            anchors {
+                verticalCenter: pathSlider.verticalCenter
+            }
+
+            property var status: 0  // indicates if it's stopped (0) or playing (1)
+
+            onClicked: {
+                switch(status) {
+                    case 0: {
+                        resumeSimulation()
+                        break
+                    }
+                    case 1: {
+                        pauseSimulation()
+                        break
+                    }
+                }
+            }
+
+            function pauseSimulation() {
+                UM.SimulationView.setSimulationRunning(false)
+                iconSource = "./resources/simulation_resume.svg"
+                simulationTimer.stop()
+                status = 0
+            }
+
+            function resumeSimulation() {
+                UM.SimulationView.setSimulationRunning(true)
+                iconSource = "./resources/simulation_pause.svg"
+                simulationTimer.start()
+            }
+        }
+
+        Timer
+        {
+            id: simulationTimer
+            interval: 100
+            running: false
+            repeat: true
+            onTriggered: {
+                var currentPath = UM.SimulationView.currentPath
+                var numPaths = UM.SimulationView.numPaths
+                var currentLayer = UM.SimulationView.currentLayer
+                var numLayers = UM.SimulationView.numLayers
+                // When the user plays the simulation, if the path slider is at the end of this layer, we start
+                // the simulation at the beginning of the current layer.
+                if (playButton.status == 0)
+                {
+                    if (currentPath >= numPaths)
+                    {
+                        UM.SimulationView.setCurrentPath(0)
+                    }
+                    else
+                    {
+                        UM.SimulationView.setCurrentPath(currentPath+1)
+                    }
+                }
+                // If the simulation is already playing and we reach the end of a layer, then it automatically
+                // starts at the beginning of the next layer.
+                else
+                {
+                    if (currentPath >= numPaths)
+                    {
+                        // At the end of the model, the simulation stops
+                        if (currentLayer >= numLayers)
+                        {
+                            playButton.pauseSimulation()
+                        }
+                        else
+                        {
+                            UM.SimulationView.setCurrentLayer(currentLayer+1)
+                            UM.SimulationView.setCurrentPath(0)
+                        }
+                    }
+                    else
+                    {
+                        UM.SimulationView.setCurrentPath(currentPath+1)
+                    }
+                }
+                playButton.status = 1
+            }
+        }
+    }
+
+    FontMetrics {
+        id: fontMetrics
+        font: UM.Theme.getFont("default")
+    }
+}

plugins/SimulationView/SimulationViewProxy.py

@@ -0,0 +1,259 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtCore import QObject, pyqtSignal, pyqtProperty
+from UM.FlameProfiler import pyqtSlot
+from UM.Application import Application
+
+import SimulationView
+
+
+class SimulationViewProxy(QObject):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._current_layer = 0
+        self._controller = Application.getInstance().getController()
+        self._controller.activeViewChanged.connect(self._onActiveViewChanged)
+        self._onActiveViewChanged()
+        self.is_simulationView_selected = False
+
+    currentLayerChanged = pyqtSignal()
+    currentPathChanged = pyqtSignal()
+    maxLayersChanged = pyqtSignal()
+    maxPathsChanged = pyqtSignal()
+    activityChanged = pyqtSignal()
+    globalStackChanged = pyqtSignal()
+    preferencesChanged = pyqtSignal()
+    busyChanged = pyqtSignal()
+
+    @pyqtProperty(bool, notify=activityChanged)
+    def layerActivity(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getActivity()
+        return False
+
+    @pyqtProperty(int, notify=maxLayersChanged)
+    def numLayers(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMaxLayers()
+        return 0
+
+    @pyqtProperty(int, notify=currentLayerChanged)
+    def currentLayer(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getCurrentLayer()
+        return 0
+
+    @pyqtProperty(int, notify=currentLayerChanged)
+    def minimumLayer(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMinimumLayer()
+        return 0
+
+    @pyqtProperty(int, notify=maxPathsChanged)
+    def numPaths(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMaxPaths()
+        return 0
+
+    @pyqtProperty(int, notify=currentPathChanged)
+    def currentPath(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getCurrentPath()
+        return 0
+
+    @pyqtProperty(int, notify=currentPathChanged)
+    def minimumPath(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMinimumPath()
+        return 0
+
+    @pyqtProperty(bool, notify=busyChanged)
+    def busy(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.isBusy()
+        return False
+
+    @pyqtProperty(bool, notify=preferencesChanged)
+    def compatibilityMode(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getCompatibilityMode()
+        return False
+
+    @pyqtSlot(int)
+    def setCurrentLayer(self, layer_num):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setLayer(layer_num)
+
+    @pyqtSlot(int)
+    def setMinimumLayer(self, layer_num):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setMinimumLayer(layer_num)
+
+    @pyqtSlot(int)
+    def setCurrentPath(self, path_num):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setPath(path_num)
+
+    @pyqtSlot(int)
+    def setMinimumPath(self, path_num):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setMinimumPath(path_num)
+
+    @pyqtSlot(int)
+    def setSimulationViewType(self, layer_view_type):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setSimulationViewisinstance(layer_view_type)
+
+    @pyqtSlot(result=int)
+    def getSimulationViewType(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getSimulationViewType()
+        return 0
+
+    @pyqtSlot(bool)
+    def setSimulationRunning(self, running):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setSimulationRunning(running)
+
+    @pyqtSlot(result=bool)
+    def getSimulationRunning(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.isSimulationRunning()
+        return False
+
+    @pyqtSlot(result=float)
+    def getMinFeedrate(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMinFeedrate()
+        return 0
+
+    @pyqtSlot(result=float)
+    def getMaxFeedrate(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMaxFeedrate()
+        return 0
+
+    @pyqtSlot(result=float)
+    def getMinThickness(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMinThickness()
+        return 0
+
+    @pyqtSlot(result=float)
+    def getMaxThickness(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getMaxThickness()
+        return 0
+
+    # Opacity 0..1
+    @pyqtSlot(int, float)
+    def setExtruderOpacity(self, extruder_nr, opacity):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setExtruderOpacity(extruder_nr, opacity)
+
+    @pyqtSlot(int)
+    def setShowTravelMoves(self, show):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setShowTravelMoves(show)
+
+    @pyqtSlot(int)
+    def setShowHelpers(self, show):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setShowHelpers(show)
+
+    @pyqtSlot(int)
+    def setShowSkin(self, show):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setShowSkin(show)
+
+    @pyqtSlot(int)
+    def setShowInfill(self, show):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            active_view.setShowInfill(show)
+
+    @pyqtProperty(int, notify=globalStackChanged)
+    def extruderCount(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            return active_view.getExtruderCount()
+        return 0
+
+    def _layerActivityChanged(self):
+        self.activityChanged.emit()
+
+    def _onLayerChanged(self):
+        self.currentLayerChanged.emit()
+        self._layerActivityChanged()
+
+    def _onPathChanged(self):
+        self.currentPathChanged.emit()
+        self._layerActivityChanged()
+
+    def _onMaxLayersChanged(self):
+        self.maxLayersChanged.emit()
+
+    def _onMaxPathsChanged(self):
+        self.maxPathsChanged.emit()
+
+    def _onBusyChanged(self):
+        self.busyChanged.emit()
+
+    def _onActivityChanged(self):
+        self.activityChanged.emit()
+
+    def _onGlobalStackChanged(self):
+        self.globalStackChanged.emit()
+
+    def _onPreferencesChanged(self):
+        self.preferencesChanged.emit()
+
+    def _onActiveViewChanged(self):
+        active_view = self._controller.getActiveView()
+        if isinstance(active_view, SimulationView.SimulationView.SimulationView):
+            # remove other connection if once the SimulationView was created.
+            if self.is_simulationView_selected:
+                active_view.currentLayerNumChanged.disconnect(self._onLayerChanged)
+                active_view.currentPathNumChanged.disconnect(self._onPathChanged)
+                active_view.maxLayersChanged.disconnect(self._onMaxLayersChanged)
+                active_view.maxPathsChanged.disconnect(self._onMaxPathsChanged)
+                active_view.busyChanged.disconnect(self._onBusyChanged)
+                active_view.activityChanged.disconnect(self._onActivityChanged)
+                active_view.globalStackChanged.disconnect(self._onGlobalStackChanged)
+                active_view.preferencesChanged.disconnect(self._onPreferencesChanged)
+
+            self.is_simulationView_selected = True
+            active_view.currentLayerNumChanged.connect(self._onLayerChanged)
+            active_view.currentPathNumChanged.connect(self._onPathChanged)
+            active_view.maxLayersChanged.connect(self._onMaxLayersChanged)
+            active_view.maxPathsChanged.connect(self._onMaxPathsChanged)
+            active_view.busyChanged.connect(self._onBusyChanged)
+            active_view.activityChanged.connect(self._onActivityChanged)
+            active_view.globalStackChanged.connect(self._onGlobalStackChanged)
+            active_view.preferencesChanged.connect(self._onPreferencesChanged)

plugins/SimulationView/__init__.py

@@ -0,0 +1,26 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtQml import qmlRegisterSingletonType
+
+from UM.i18n import i18nCatalog
+from . import SimulationViewProxy, SimulationView
+
+catalog = i18nCatalog("cura")
+
+def getMetaData():
+    return {
+        "view": {
+            "name": catalog.i18nc("@item:inlistbox", "Layer view"),
+            "view_panel": "SimulationView.qml",
+            "weight": 2
+        }
+    }
+
+def createSimulationViewProxy(engine, script_engine):
+    return SimulationViewProxy.SimulatorViewProxy()
+
+def register(app):
+    simulation_view = SimulationView.SimulationView()
+    qmlRegisterSingletonType(SimulationViewProxy.SimulationViewProxy, "UM", 1, 0, "SimulationView", simulation_view.getProxy)
+    return { "view": SimulationView.SimulationView()}

plugins/SimulationView/layers3d.shader

@@ -6,6 +6,10 @@ vertex41core =
     uniform highp mat4 u_modelMatrix;
     uniform highp mat4 u_viewProjectionMatrix;
     uniform lowp float u_active_extruder;
+    uniform lowp float u_max_feedrate;
+    uniform lowp float u_min_feedrate;
+    uniform lowp float u_max_thickness;
+    uniform lowp float u_min_thickness;
     uniform lowp int u_layer_view_type;
     uniform lowp vec4 u_extruder_opacity;  // currently only for max 4 extruders, others always visible
 
@@ -18,6 +22,8 @@ vertex41core =
     in highp vec2 a_line_dim;  // line width and thickness
     in highp float a_extruder;
     in highp float a_line_type;
+    in highp float a_feedrate;
+    in highp float a_thickness;
 
     out lowp vec4 v_color;
 
@@ -32,6 +38,28 @@ vertex41core =
     out highp vec3 f_vertex;
     out highp vec3 f_normal;
 
+    vec4 feedrateGradientColor(float abs_value, float min_value, float max_value)
+    {
+        float value = (abs_value - min_value)/(max_value - min_value);
+        float red = value;
+        float green = 1-abs(1-4*value);
+        if (value > 0.375)
+        {
+            green = 0.5;
+        }
+        float blue = max(1-4*value, 0);
+        return vec4(red, green, blue, 1.0);
+    }
+
+    vec4 layerThicknessGradientColor(float abs_value, float min_value, float max_value)
+    {
+        float value = (abs_value - min_value)/(max_value - min_value);
+        float red = max(2*value-1, 0);
+        float green = 1-abs(1-2*value);
+        float blue = max(1-2*value, 0);
+        return vec4(red, green, blue, 1.0);
+    }
+
     void main()
     {
         vec4 v1_vertex = a_vertex;
@@ -48,6 +76,12 @@ vertex41core =
             case 1:  // "Line type"
                 v_color = a_color;
                 break;
+            case 2:  // "Feedrate"
+                v_color = feedrateGradientColor(a_feedrate, u_min_feedrate, u_max_feedrate);
+                break;
+            case 3:  // "Layer thickness"
+                v_color = layerThicknessGradientColor(a_line_dim.y, u_min_thickness, u_max_thickness);
+                break;
         }
 
         v_vertex = world_space_vert.xyz;
@@ -247,6 +281,12 @@ u_show_helpers = 1
 u_show_skin = 1
 u_show_infill = 1
 
+u_min_feedrate = 0
+u_max_feedrate = 1
+
+u_min_thickness = 0
+u_max_thickness = 1
+
 [bindings]
 u_modelViewProjectionMatrix = model_view_projection_matrix
 u_modelMatrix = model_matrix
@@ -262,3 +302,5 @@ a_line_dim = line_dim
 a_extruder = extruder
 a_material_color = material_color
 a_line_type = line_type
+a_feedrate = feedrate
+a_thickness = thickness

plugins/SimulationView/layers3d_shadow.shader

@@ -0,0 +1,256 @@
+[shaders]
+vertex41core =
+    #version 410
+    uniform highp mat4 u_modelViewProjectionMatrix;
+
+    uniform highp mat4 u_modelMatrix;
+    uniform highp mat4 u_viewProjectionMatrix;
+    uniform lowp float u_active_extruder;
+    uniform lowp vec4 u_extruder_opacity;  // currently only for max 4 extruders, others always visible
+
+    uniform highp mat4 u_normalMatrix;
+
+    in highp vec4 a_vertex;
+    in lowp vec4 a_color;
+    in lowp vec4 a_grayColor;
+    in lowp vec4 a_material_color;
+    in highp vec4 a_normal;
+    in highp vec2 a_line_dim;  // line width and thickness
+    in highp float a_extruder;
+    in highp float a_line_type;
+
+    out lowp vec4 v_color;
+
+    out highp vec3 v_vertex;
+    out highp vec3 v_normal;
+    out lowp vec2 v_line_dim;
+    out highp int v_extruder;
+    out highp vec4 v_extruder_opacity;
+    out float v_line_type;
+
+    out lowp vec4 f_color;
+    out highp vec3 f_vertex;
+    out highp vec3 f_normal;
+
+    void main()
+    {
+        vec4 v1_vertex = a_vertex;
+        v1_vertex.y -= a_line_dim.y / 2;  // half layer down
+
+        vec4 world_space_vert = u_modelMatrix * v1_vertex;
+        gl_Position = world_space_vert;
+        // shade the color depending on the extruder index stored in the alpha component of the color
+
+        v_color = vec4(0.4, 0.4, 0.4, 0.9);    // default color for not current layer
+        v_vertex = world_space_vert.xyz;
+        v_normal = (u_normalMatrix * normalize(a_normal)).xyz;
+        v_line_dim = a_line_dim;
+        v_extruder = int(a_extruder);
+        v_line_type = a_line_type;
+        v_extruder_opacity = u_extruder_opacity;
+
+        // for testing without geometry shader
+        f_color = v_color;
+        f_vertex = v_vertex;
+        f_normal = v_normal;
+    }
+
+geometry41core =
+    #version 410
+
+    uniform highp mat4 u_viewProjectionMatrix;
+    uniform int u_show_travel_moves;
+    uniform int u_show_helpers;
+    uniform int u_show_skin;
+    uniform int u_show_infill;
+
+    layout(lines) in;
+    layout(triangle_strip, max_vertices = 26) out;
+
+    in vec4 v_color[];
+    in vec3 v_vertex[];
+    in vec3 v_normal[];
+    in vec2 v_line_dim[];
+    in int v_extruder[];
+    in vec4 v_extruder_opacity[];
+    in float v_line_type[];
+
+    out vec4 f_color;
+    out vec3 f_normal;
+    out vec3 f_vertex;
+
+    // Set the set of variables and EmitVertex
+    void myEmitVertex(vec3 vertex, vec4 color, vec3 normal, vec4 pos) {
+        f_vertex = vertex;
+        f_color = color;
+        f_normal = normal;
+        gl_Position = pos;
+        EmitVertex();
+    }
+
+    void main()
+    {
+        vec4 g_vertex_delta;
+        vec3 g_vertex_normal_horz;  // horizontal and vertical in respect to layers
+        vec4 g_vertex_offset_horz;  // vec4 to match gl_in[x].gl_Position
+        vec3 g_vertex_normal_vert;
+        vec4 g_vertex_offset_vert;
+        vec3 g_vertex_normal_horz_head;
+        vec4 g_vertex_offset_horz_head;
+
+        float size_x;
+        float size_y;
+
+        if ((v_extruder_opacity[0][v_extruder[0]] == 0.0) && (v_line_type[0] != 8) && (v_line_type[0] != 9)) {
+            return;
+        }
+        // See LayerPolygon; 8 is MoveCombingType, 9 is RetractionType
+        if ((u_show_travel_moves == 0) && ((v_line_type[0] == 8) || (v_line_type[0] == 9))) {
+            return;
+        }
+        if ((u_show_helpers == 0) && ((v_line_type[0] == 4) || (v_line_type[0] == 5) || (v_line_type[0] == 7) || (v_line_type[0] == 10))) {
+            return;
+        }
+        if ((u_show_skin == 0) && ((v_line_type[0] == 1) || (v_line_type[0] == 2) || (v_line_type[0] == 3))) {
+            return;
+        }
+        if ((u_show_infill == 0) && (v_line_type[0] == 6)) {
+            return;
+        }
+
+        if ((v_line_type[0] == 8) || (v_line_type[0] == 9)) {
+            // fixed size for movements
+            size_x = 0.05;
+        } else {
+            size_x = v_line_dim[1].x / 2 + 0.01;  // radius, and make it nicely overlapping
+        }
+        size_y = v_line_dim[1].y / 2 + 0.01;
+
+        g_vertex_delta = gl_in[1].gl_Position - gl_in[0].gl_Position;
+        g_vertex_normal_horz_head = normalize(vec3(-g_vertex_delta.x, -g_vertex_delta.y, -g_vertex_delta.z));
+        g_vertex_offset_horz_head = vec4(g_vertex_normal_horz_head * size_x, 0.0);
+
+        g_vertex_normal_horz = normalize(vec3(g_vertex_delta.z, g_vertex_delta.y, -g_vertex_delta.x));
+
+        g_vertex_offset_horz = vec4(g_vertex_normal_horz * size_x, 0.0); //size * g_vertex_normal_horz;
+        g_vertex_normal_vert = vec3(0.0, 1.0, 0.0);
+        g_vertex_offset_vert = vec4(g_vertex_normal_vert * size_y, 0.0);
+
+        if ((v_line_type[0] == 8) || (v_line_type[0] == 9)) {
+            // Travels: flat plane with pointy ends
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head + g_vertex_offset_vert));
+
+            EndPrimitive();
+        } else {
+            // All normal lines are rendered as 3d tubes.
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
+            myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
+
+            EndPrimitive();
+
+            // left side
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head));
+            myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
+
+            EndPrimitive();
+
+            myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
+            myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head));
+            myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
+
+            EndPrimitive();
+
+            // right side
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head));
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
+
+            EndPrimitive();
+
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert));
+            myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, u_viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head));
+            myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, u_viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
+
+            EndPrimitive();
+        }
+    }
+
+fragment41core =
+    #version 410
+    in lowp vec4 f_color;
+    in lowp vec3 f_normal;
+    in lowp vec3 f_vertex;
+
+    out vec4 frag_color;
+
+    uniform mediump vec4 u_ambientColor;
+    uniform highp vec3 u_lightPosition;
+
+    void main()
+    {
+        mediump vec4 finalColor = vec4(0.0);
+        float alpha = f_color.a;
+
+        finalColor.rgb += f_color.rgb * 0.3;
+
+        highp vec3 normal = normalize(f_normal);
+        highp vec3 light_dir = normalize(u_lightPosition - f_vertex);
+
+        // Diffuse Component
+        highp float NdotL = clamp(dot(normal, light_dir), 0.0, 1.0);
+        finalColor += (NdotL * f_color);
+        finalColor.a = alpha;  // Do not change alpha in any way
+
+        frag_color = finalColor;
+    }
+
+
+[defaults]
+u_active_extruder = 0.0
+u_extruder_opacity = [1.0, 1.0, 1.0, 1.0]
+
+u_specularColor = [0.4, 0.4, 0.4, 1.0]
+u_ambientColor = [0.3, 0.3, 0.3, 0.0]
+u_diffuseColor = [1.0, 0.79, 0.14, 1.0]
+u_shininess = 20.0
+
+u_show_travel_moves = 0
+u_show_helpers = 1
+u_show_skin = 1
+u_show_infill = 1
+
+[bindings]
+u_modelViewProjectionMatrix = model_view_projection_matrix
+u_modelMatrix = model_matrix
+u_viewProjectionMatrix = view_projection_matrix
+u_normalMatrix = normal_matrix
+u_lightPosition = light_0_position
+
+[attributes]
+a_vertex = vertex
+a_color = color
+a_grayColor = vec4(0.87, 0.12, 0.45, 1.0)
+a_normal = normal
+a_line_dim = line_dim
+a_extruder = extruder
+a_material_color = material_color
+a_line_type = line_type

plugins/SimulationView/layers_shadow.shader

@@ -0,0 +1,156 @@
+[shaders]
+vertex =
+    uniform highp mat4 u_modelViewProjectionMatrix;
+    uniform lowp float u_active_extruder;
+    uniform lowp float u_shade_factor;
+    uniform highp int u_layer_view_type;
+
+    attribute highp float a_extruder;
+    attribute highp float a_line_type;
+    attribute highp vec4 a_vertex;
+    attribute lowp vec4 a_color;
+    attribute lowp vec4 a_material_color;
+
+    varying lowp vec4 v_color;
+    varying float v_line_type;
+
+    void main()
+    {
+        gl_Position = u_modelViewProjectionMatrix * a_vertex;
+        // shade the color depending on the extruder index
+        v_color = vec4(0.4, 0.4, 0.4, 0.9);    // default color for not current layer;
+        // 8 and 9 are travel moves
+        // if ((a_line_type != 8.0) && (a_line_type != 9.0)) {
+        //     v_color = (a_extruder == u_active_extruder) ? v_color : vec4(u_shade_factor * v_color.rgb, v_color.a);
+        // }
+
+        v_line_type = a_line_type;
+    }
+
+fragment =
+    varying lowp vec4 v_color;
+    varying float v_line_type;
+
+    uniform int u_show_travel_moves;
+    uniform int u_show_helpers;
+    uniform int u_show_skin;
+    uniform int u_show_infill;
+
+    void main()
+    {
+        if ((u_show_travel_moves == 0) && (v_line_type >= 7.5) && (v_line_type <= 9.5)) {  // actually, 8 and 9
+            // discard movements
+            discard;
+        }
+        // support: 4, 5, 7, 10
+        if ((u_show_helpers == 0) && (
+            ((v_line_type >= 3.5) && (v_line_type <= 4.5)) ||
+            ((v_line_type >= 6.5) && (v_line_type <= 7.5)) ||
+            ((v_line_type >= 9.5) && (v_line_type <= 10.5)) ||
+            ((v_line_type >= 4.5) && (v_line_type <= 5.5))
+            )) {
+            discard;
+        }
+        // skin: 1, 2, 3
+        if ((u_show_skin == 0) && (
+            (v_line_type >= 0.5) && (v_line_type <= 3.5)
+            )) {
+            discard;
+        }
+        // infill:
+        if ((u_show_infill == 0) && (v_line_type >= 5.5) && (v_line_type <= 6.5)) {
+            // discard movements
+            discard;
+        }
+
+        gl_FragColor = v_color;
+    }
+
+vertex41core =
+    #version 410
+    uniform highp mat4 u_modelViewProjectionMatrix;
+    uniform lowp float u_active_extruder;
+    uniform lowp float u_shade_factor;
+    uniform highp int u_layer_view_type;
+
+    in highp float a_extruder;
+    in highp float a_line_type;
+    in highp vec4 a_vertex;
+    in lowp vec4 a_color;
+    in lowp vec4 a_material_color;
+
+    out lowp vec4 v_color;
+    out float v_line_type;
+
+    void main()
+    {
+        gl_Position = u_modelViewProjectionMatrix * a_vertex;
+        v_color = vec4(0.4, 0.4, 0.4, 0.9);    // default color for not current layer
+        // if ((a_line_type != 8) && (a_line_type != 9)) {
+        //     v_color = (a_extruder == u_active_extruder) ? v_color : vec4(u_shade_factor * v_color.rgb, v_color.a);
+        // }
+
+        v_line_type = a_line_type;
+    }
+
+fragment41core =
+    #version 410
+    in lowp vec4 v_color;
+    in float v_line_type;
+    out vec4 frag_color;
+
+    uniform int u_show_travel_moves;
+    uniform int u_show_helpers;
+    uniform int u_show_skin;
+    uniform int u_show_infill;
+
+    void main()
+    {
+        if ((u_show_travel_moves == 0) && (v_line_type >= 7.5) && (v_line_type <= 9.5)) {  // actually, 8 and 9
+            // discard movements
+            discard;
+        }
+        // helpers: 4, 5, 7, 10
+        if ((u_show_helpers == 0) && (
+            ((v_line_type >= 3.5) && (v_line_type <= 4.5)) ||
+            ((v_line_type >= 6.5) && (v_line_type <= 7.5)) ||
+            ((v_line_type >= 9.5) && (v_line_type <= 10.5)) ||
+            ((v_line_type >= 4.5) && (v_line_type <= 5.5))
+            )) {
+            discard;
+        }
+        // skin: 1, 2, 3
+        if ((u_show_skin == 0) && (
+            (v_line_type >= 0.5) && (v_line_type <= 3.5)
+            )) {
+            discard;
+        }
+        // infill:
+        if ((u_show_infill == 0) && (v_line_type >= 5.5) && (v_line_type <= 6.5)) {
+            // discard movements
+            discard;
+        }
+
+        frag_color = v_color;
+    }
+
+[defaults]
+u_active_extruder = 0.0
+u_shade_factor = 0.60
+u_layer_view_type = 0
+u_extruder_opacity = [1.0, 1.0, 1.0, 1.0]
+
+u_show_travel_moves = 0
+u_show_helpers = 1
+u_show_skin = 1
+u_show_infill = 1
+
+[bindings]
+u_modelViewProjectionMatrix = model_view_projection_matrix
+
+[attributes]
+a_vertex = vertex
+a_color = color
+a_extruder = extruder
+a_line_type = line_type
+a_material_color = material_color

plugins/SimulationView/plugin.json

@@ -1,8 +1,8 @@
 {
-    "name": "Layer View",
+    "name": "Simulation View",
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
-    "description": "Provides the Layer view.",
+    "description": "Provides the Simulation view.",
     "api": 4,
     "i18n-catalog": "cura"
 }

plugins/SimulationView/resources/simulation_pause.svg

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="6mm"
+   height="6mm"
+   viewBox="0 0 5.9999999 6"
+   version="1.1"
+   id="svg877"
+   inkscape:version="0.92.2 (5c3e80d, 2017-08-06)"
+   sodipodi:docname="simulation_pause2.svg">
+  <defs
+     id="defs871" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="15.839192"
+     inkscape:cx="-5.3551409"
+     inkscape:cy="17.386031"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="2880"
+     inkscape:window-height="1675"
+     inkscape:window-x="-13"
+     inkscape:window-y="-13"
+     inkscape:window-maximized="1"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0" />
+  <metadata
+     id="metadata874">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-11.163774,-122.8006)">
+    <g
+       id="g825"
+       transform="matrix(0.26458333,0,0,0.26458333,10.185689,121.85192)">
+      <rect
+         y="5"
+         x="19"
+         height="20"
+         width="2.7552757"
+         id="rect5192"
+         style="fill:#000000;fill-opacity:1;stroke:none;stroke-width:2.34745646;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" />
+      <rect
+         y="5"
+         x="9"
+         height="20"
+         width="2.7552757"
+         id="rect5192-5"
+         style="fill:#000000;fill-opacity:1;stroke:none;stroke-width:2.34745646;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" />
+    </g>
+  </g>
+</svg>

plugins/SimulationView/resources/simulation_resume.svg

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="6mm"
+   height="6mm"
+   viewBox="0 0 6 6"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.2 (5c3e80d, 2017-08-06)"
+   sodipodi:docname="simulation_resume2.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="15.839192"
+     inkscape:cx="-32.404712"
+     inkscape:cy="14.267522"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="2880"
+     inkscape:window-height="1675"
+     inkscape:window-x="-13"
+     inkscape:window-y="-13"
+     inkscape:window-maximized="1"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(81.024887,-389.647)">
+    <path
+       sodipodi:type="star"
+       style="fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.50520164;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="path847"
+       sodipodi:sides="3"
+       sodipodi:cx="-78.732257"
+       sodipodi:cy="392.65222"
+       sodipodi:r1="3.0592039"
+       sodipodi:r2="1.5296021"
+       sodipodi:arg1="0"
+       sodipodi:arg2="1.0471976"
+       inkscape:flatsided="true"
+       inkscape:rounded="0"
+       inkscape:randomized="0"
+       d="m -75.67305,392.65222 -4.588806,2.64935 v -5.2987 z"
+       inkscape:transform-center-x="0.75529536"
+       inkscape:transform-center-y="0.40090429" />
+  </g>
+</svg>

plugins/SliceInfoPlugin/SliceInfo.py

@@ -87,16 +87,11 @@ class SliceInfo(Extension):
 
             data["active_machine"] = {"definition_id": global_container_stack.definition.getId(), "manufacturer": global_container_stack.definition.getMetaData().get("manufacturer","")}
 
+            # add extruder specific data to slice info
             data["extruders"] = []
-            extruder_count = len(global_container_stack.extruders)
-            extruders = []
-            if extruder_count > 1:
             extruders = list(ExtruderManager.getInstance().getMachineExtruders(global_container_stack.getId()))
             extruders = sorted(extruders, key = lambda extruder: extruder.getMetaDataEntry("position"))
 
-            if not extruders:
-                extruders = [global_container_stack]
-
             for extruder in extruders:
                 extruder_dict = dict()
                 extruder_dict["active"] = ExtruderManager.getInstance().getActiveExtruderStack() == extruder

plugins/SolidView/SolidView.py

@@ -46,21 +46,12 @@ class SolidView(View):
             self._disabled_shader.setUniformValue("u_diffuseColor2", Color(*theme.getColor("model_unslicable_alt").getRgb()))
             self._disabled_shader.setUniformValue("u_width", 50.0)
 
-        multi_extrusion = False
-
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
-            multi_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
-
-            if multi_extrusion:
             support_extruder_nr = global_container_stack.getProperty("support_extruder_nr", "value")
-                support_angle_stack = ExtruderManager.getInstance().getExtruderStack(support_extruder_nr)
+            support_angle_stack = Application.getInstance().getExtruderManager().getExtruderStack(support_extruder_nr)
-                if not support_angle_stack:
-                    support_angle_stack = global_container_stack
-            else:
-                support_angle_stack = global_container_stack
 
-            if Preferences.getInstance().getValue("view/show_overhang"):
+            if support_angle_stack is not None and Preferences.getInstance().getValue("view/show_overhang"):
                 angle = support_angle_stack.getProperty("support_angle", "value")
                 # Make sure the overhang angle is valid before passing it to the shader
                 # Note: if the overhang angle is set to its default value, it does not need to get validated (validationState = None)
@@ -71,20 +62,12 @@ class SolidView(View):
             else:
                 self._enabled_shader.setUniformValue("u_overhangAngle", math.cos(math.radians(0)))
 
-
         for node in DepthFirstIterator(scene.getRoot()):
             if not node.render(renderer):
                 if node.getMeshData() and node.isVisible():
                     uniforms = {}
                     shade_factor = 1.0
 
-                    if not multi_extrusion:
-                        if global_container_stack:
-                            material = global_container_stack.findContainer({ "type": "material" })
-                            material_color = material.getMetaDataEntry("color_code", default = self._extruders_model.defaultColors[0]) if material else self._extruders_model.defaultColors[0]
-                        else:
-                            material_color = self._extruders_model.defaultColors[0]
-                    else:
                     # Get color to render this mesh in from ExtrudersModel
                     extruder_index = 0
                     extruder_id = node.callDecoration("getActiveExtruder")
@@ -98,6 +81,7 @@ class SolidView(View):
                     if extruder_index != ExtruderManager.getInstance().activeExtruderIndex:
                         # Shade objects that are printed with the non-active extruder 25% darker
                         shade_factor = 0.6
+
                     try:
                         # Colors are passed as rgb hex strings (eg "#ffffff"), and the shader needs
                         # an rgba list of floats (eg [1.0, 1.0, 1.0, 1.0])

plugins/UM3NetworkPrinting/ClusterControlItem.qml

@@ -83,8 +83,7 @@ Component
                 anchors.leftMargin: UM.Theme.getSize("default_margin").width
                 anchors.right: parent.right
                 anchors.rightMargin: UM.Theme.getSize("default_margin").width
-                //TODO; It's probably nicer to do this with a dynamic data model instead of hardcoding this.
+
-                //But you know the drill; time constraints don't result in elegant code.
                 Item
                 {
                     width: parent.width

plugins/UM3NetworkPrinting/DiscoverUM3Action.qml

@@ -114,7 +114,7 @@ Cura.MachineAction
 
             Column
             {
-                width: (parent.width * 0.5) | 0
+                width: Math.floor(parent.width * 0.5)
                 spacing: UM.Theme.getSize("default_margin").height
 
                 ScrollView
@@ -191,8 +191,6 @@ Cura.MachineAction
                     anchors.left: parent.left
                     anchors.right: parent.right
                     wrapMode: Text.WordWrap
-                    //: Tips label
-                    //TODO: get actual link from webteam
                     text: catalog.i18nc("@label", "If your printer is not listed, read the <a href='%1'>network printing troubleshooting guide</a>").arg("https://ultimaker.com/en/troubleshooting");
                     onLinkActivated: Qt.openUrlExternally(link)
                 }
@@ -200,7 +198,7 @@ Cura.MachineAction
             }
             Column
             {
-                width: (parent.width * 0.5) | 0
+                width: Math.floor(parent.width * 0.5)
                 visible: base.selectedPrinter ? true : false
                 spacing: UM.Theme.getSize("default_margin").height
                 Label
@@ -218,13 +216,13 @@ Cura.MachineAction
                     columns: 2
                     Label
                     {
-                        width: (parent.width * 0.5) | 0
+                        width: Math.floor(parent.width * 0.5)
                         wrapMode: Text.WordWrap
                         text: catalog.i18nc("@label", "Type")
                     }
                     Label
                     {
-                        width: (parent.width * 0.5) | 0
+                        width: Math.floor(parent.width * 0.5)
                         wrapMode: Text.WordWrap
                         text:
                         {
@@ -232,13 +230,13 @@ Cura.MachineAction
                             {
                                 if(base.selectedPrinter.printerType == "ultimaker3")
                                 {
-                                    return catalog.i18nc("@label", "Ultimaker 3")
+                                    return catalog.i18nc("@label Printer name", "Ultimaker 3")
                                 } else if(base.selectedPrinter.printerType == "ultimaker3_extended")
                                 {
-                                    return catalog.i18nc("@label", "Ultimaker 3 Extended")
+                                    return catalog.i18nc("@label Printer name", "Ultimaker 3 Extended")
                                 } else
                                 {
-                                    return catalog.i18nc("@label", "Unknown") // We have no idea what type it is. Should not happen 'in the field'
+                                    return catalog.i18nc("@label Printer name", "Unknown") // We have no idea what type it is. Should not happen 'in the field'
                                 }
                             }
                             else
@@ -249,25 +247,25 @@ Cura.MachineAction
                     }
                     Label
                     {
-                        width: (parent.width * 0.5) | 0
+                        width: Math.floor(parent.width * 0.5)
                         wrapMode: Text.WordWrap
                         text: catalog.i18nc("@label", "Firmware version")
                     }
                     Label
                     {
-                        width: (parent.width * 0.5) | 0
+                        width: Math.floor(parent.width * 0.5)
                         wrapMode: Text.WordWrap
                         text: base.selectedPrinter ? base.selectedPrinter.firmwareVersion : ""
                     }
                     Label
                     {
-                        width: (parent.width * 0.5) | 0
+                        width: Math.floor(parent.width * 0.5)
                         wrapMode: Text.WordWrap
                         text: catalog.i18nc("@label", "Address")
                     }
                     Label
                     {
-                        width: (parent.width * 0.5) | 0
+                        width: Math.floor(parent.width * 0.5)
                         wrapMode: Text.WordWrap
                         text: base.selectedPrinter ? base.selectedPrinter.ipAddress : ""
                     }
@@ -278,12 +276,8 @@ Cura.MachineAction
                     width: parent.width
                     wrapMode: Text.WordWrap
                     text:{
-                        if (base.selectedPrinter == undefined)
-                        {
-                            return "";
-                        }
                         // The property cluster size does not exist for older UM3 devices.
-                        if(base.selectedPrinter != undefined && base.selectedPrinter.clusterSize == null || base.selectedPrinter.clusterSize == 1)
+                        if(!base.selectedPrinter || base.selectedPrinter.clusterSize == null || base.selectedPrinter.clusterSize == 1)
                         {
                             return "";
                         }

plugins/UM3NetworkPrinting/MonitorItem.qml

@@ -17,10 +17,10 @@ Component
             }
             return (sourceSize.width / sourceSize.height) > (maximumWidth / maximumHeight);
         }
-        property real _width: Math.min(maximumWidth, sourceSize.width)
+        property real _width: Math.floor(Math.min(maximumWidth, sourceSize.width))
-        property real _height: Math.min(maximumHeight, sourceSize.height)
+        property real _height: Math.floor(Math.min(maximumHeight, sourceSize.height))
-        width: proportionalHeight ? _width : sourceSize.width * _height / sourceSize.height
+        width: proportionalHeight ? _width : Math.floor(sourceSize.width * _height / sourceSize.height)
-        height: !proportionalHeight ? _height : sourceSize.height * _width / sourceSize.width
+        height: !proportionalHeight ? _height : Math.floor(sourceSize.height * _width / sourceSize.width)
         anchors.horizontalCenter: parent.horizontalCenter
 
         onVisibleChanged:

plugins/UM3NetworkPrinting/NetworkClusterPrinterOutputDevice.py

@@ -103,6 +103,7 @@ class NetworkClusterPrinterOutputDevice(NetworkPrinterOutputDevice.NetworkPrinte
         self._can_pause = True
         self._can_abort = True
         self._can_pre_heat_bed = False
+        self._can_control_manually = False
         self._cluster_size = int(properties.get(b"cluster_size", 0))
 
         self._cleanupRequest()
@@ -220,7 +221,9 @@ class NetworkClusterPrinterOutputDevice(NetworkPrinterOutputDevice.NetworkPrinte
         self.setPrinters(json_data)
 
     def materialHotendChangedMessage(self, callback):
-        pass # Do nothing.
+        # When there is just one printer, the activate configuration option is enabled
+        if (self._cluster_size == 1):
+            super().materialHotendChangedMessage(callback = callback)
 
     def _startCameraStream(self):
         ## Request new image
@@ -483,7 +486,7 @@ class NetworkClusterPrinterOutputDevice(NetworkPrinterOutputDevice.NetworkPrinte
 
                 printer_name = self.__getPrinterNameFromUuid(print_job["printer_uuid"])
                 if printer_name is None:
-                    printer_name = i18n_catalog.i18nc("@label", "Unknown")
+                    printer_name = i18n_catalog.i18nc("@label Printer name", "Unknown")
 
                 message_text = (i18n_catalog.i18nc("@info:status",
                                 "Printer '{printer_name}' has finished printing '{job_name}'.")

plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py

@@ -102,6 +102,8 @@ class NetworkPrinterOutputDevice(PrinterOutputDevice):
         self._target_bed_temperature = 0
         self._processing_preheat_requests = True
 
+        self._can_control_manually = False
+
         self.setPriority(3) # Make sure the output device gets selected above local file output
         self.setName(key)
         self.setShortDescription(i18n_catalog.i18nc("@action:button Preceded by 'Ready to'.", "Print over network"))

plugins/UM3NetworkPrinting/PrintCoreConfiguration.qml

@@ -10,7 +10,7 @@ Item
     id: extruderInfo
     property var printCoreConfiguration
 
-    width: parent.width / 2
+    width: Math.floor(parent.width / 2)
     height: childrenRect.height
     Label
     {

plugins/UM3NetworkPrinting/PrinterInfoBlock.qml

@@ -44,7 +44,7 @@ Rectangle
             case "maintenance":  // TODO: new string
             case "unknown":
             default:
-                return catalog.i18nc("@label", "Unknown");
+                return catalog.i18nc("@label Printer status", "Unknown");
         }
     }
 
@@ -86,7 +86,7 @@ Rectangle
 
         Rectangle
         {
-            width: parent.width / 3
+            width: Math.floor(parent.width / 3)
             height: parent.height
 
             Label   // Print job name
@@ -131,7 +131,7 @@ Rectangle
 
         Rectangle
         {
-            width: parent.width / 3 * 2
+            width: Math.floor(parent.width / 3 * 2)
             height: parent.height
 
             Label   // Friendly machine name
@@ -139,7 +139,7 @@ Rectangle
                 id: printerNameLabel
                 anchors.top: parent.top
                 anchors.left: parent.left
-                width: parent.width / 2 - UM.Theme.getSize("default_margin").width - showCameraIcon.width
+                width: Math.floor(parent.width / 2 - UM.Theme.getSize("default_margin").width - showCameraIcon.width)
                 text: printer.friendly_name
                 font: UM.Theme.getFont("default_bold")
                 elide: Text.ElideRight
@@ -149,7 +149,7 @@ Rectangle
             {
                 id: printerTypeLabel
                 anchors.top: printerNameLabel.bottom
-                width: parent.width / 2 - UM.Theme.getSize("default_margin").width
+                width: Math.floor(parent.width / 2 - UM.Theme.getSize("default_margin").width)
                 text: printer.machine_variant
                 anchors.left: parent.left
                 elide: Text.ElideRight
@@ -183,7 +183,7 @@ Rectangle
                 id: extruderInfo
                 anchors.bottom: parent.bottom
 
-                width: parent.width / 2 - UM.Theme.getSize("default_margin").width
+                width: Math.floor(parent.width / 2 - UM.Theme.getSize("default_margin").width)
                 height: childrenRect.height
 
                 spacing: UM.Theme.getSize("default_margin").width
@@ -217,7 +217,7 @@ Rectangle
                 anchors.right: parent.right
                 anchors.top: parent.top
                 height: showExtended ? parent.height: printProgressTitleBar.height
-                width: parent.width / 2 - UM.Theme.getSize("default_margin").width
+                width: Math.floor(parent.width / 2 - UM.Theme.getSize("default_margin").width)
                 border.width: UM.Theme.getSize("default_lining").width
                 border.color: lineColor
                 radius: cornerRadius

plugins/UM3NetworkPrinting/PrinterVideoStream.qml

@@ -57,7 +57,7 @@ Item
     {
         id: cameraImage
         width: Math.min(sourceSize.width === 0 ? 800 * screenScaleFactor : sourceSize.width, maximumWidth)
-        height: (sourceSize.height === 0 ? 600 * screenScaleFactor : sourceSize.height) * width / sourceSize.width
+        height: Math.floor((sourceSize.height === 0 ? 600 * screenScaleFactor : sourceSize.height) * width / sourceSize.width)
         anchors.horizontalCenter: parent.horizontalCenter
         anchors.verticalCenter: parent.verticalCenter
         z: 1

plugins/UM3NetworkPrinting/UM3InfoComponents.qml

@@ -115,8 +115,22 @@ Item
         {
             tooltip: catalog.i18nc("@info:tooltip", "Load the configuration of the printer into Cura")
             text: catalog.i18nc("@action:button", "Activate Configuration")
-            visible: printerConnected
+            visible: printerConnected && !isClusterPrinter()
             onClicked: manager.loadConfigurationFromPrinter()
+
+            function isClusterPrinter() {
+                if(Cura.MachineManager.printerOutputDevices.length == 0)
+                {
+                    return false;
+                }
+                var clusterSize = Cura.MachineManager.printerOutputDevices[0].clusterSize;
+                // This is not a cluster printer or the cluster it is just one printer
+                if(clusterSize == undefined || clusterSize == 1)
+                {
+                    return false;
+                }
+                return true;
+            }
         }
     }
 

plugins/USBPrinting/USBPrinterOutputDeviceManager.py

@@ -91,12 +91,8 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
     #   This will create the view if its not already created.
     def spawnFirmwareInterface(self, serial_port):
         if self._firmware_view is None:
-            path = QUrl.fromLocalFile(os.path.join(PluginRegistry.getInstance().getPluginPath("USBPrinting"), "FirmwareUpdateWindow.qml"))
+            path = os.path.join(PluginRegistry.getInstance().getPluginPath("USBPrinting"), "FirmwareUpdateWindow.qml")
-            component = QQmlComponent(Application.getInstance()._engine, path)
+            self._firmware_view = Application.getInstance().createQmlComponent(path, {"manager": self})
-
-            self._firmware_context = QQmlContext(Application.getInstance()._engine.rootContext())
-            self._firmware_context.setContextProperty("manager", self)
-            self._firmware_view = component.create(self._firmware_context)
 
         self._firmware_view.show()
 

plugins/UltimakerMachineActions/UM2UpgradeSelection.py

@@ -37,8 +37,7 @@ class UM2UpgradeSelection(MachineAction):
     def setHasVariants(self, has_variants = True):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
-            variant_container = global_container_stack.variant
+            variant_container = global_container_stack.extruders["0"].variant
-            variant_index = global_container_stack.getContainerIndex(variant_container)
 
             if has_variants:
                 if "has_variants" in global_container_stack.getMetaData():
@@ -52,7 +51,7 @@ class UM2UpgradeSelection(MachineAction):
                     search_criteria = { "type": "variant", "definition": "ultimaker2", "id": "*0.4*" }
                     containers = self._container_registry.findInstanceContainers(**search_criteria)
                     if containers:
-                        global_container_stack.variant = containers[0]
+                        global_container_stack.extruders["0"].variant = containers[0]
             else:
                 # The metadata entry is stored in an ini, and ini files are parsed as strings only.
                 # Because any non-empty string evaluates to a boolean True, we have to remove the entry to make it False.
@@ -60,6 +59,6 @@ class UM2UpgradeSelection(MachineAction):
                     global_container_stack.removeMetaDataEntry("has_variants")
 
                 # Set the variant container to an empty variant
-                global_container_stack.variant = ContainerRegistry.getInstance().getEmptyInstanceContainer()
+                global_container_stack.extruders["0"].variant = ContainerRegistry.getInstance().getEmptyInstanceContainer()
 
             Application.getInstance().globalContainerStackChanged.emit()

plugins/UserAgreementPlugin/UserAgreement.py

@@ -0,0 +1,49 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM.Extension import Extension
+from UM.Preferences import Preferences
+from UM.Application import Application
+from UM.PluginRegistry import PluginRegistry
+from UM.Logger import Logger
+
+from cura.CuraApplication import CuraApplication
+
+from PyQt5.QtQml import QQmlComponent, QQmlContext
+from PyQt5.QtCore import QUrl, QObject, pyqtSlot
+
+import os.path
+
+class UserAgreement(QObject, Extension):
+    def __init__(self, parent = None):
+        super(UserAgreement, self).__init__()
+        self._user_agreement_window = None
+        self._user_agreement_context = None
+        Application.getInstance().engineCreatedSignal.connect(self._onEngineCreated)
+        Preferences.getInstance().addPreference("general/accepted_user_agreement", False)
+
+    def _onEngineCreated(self):
+        if not Preferences.getInstance().getValue("general/accepted_user_agreement"):
+            self.showUserAgreement()
+
+    def showUserAgreement(self):
+        if not self._user_agreement_window:
+            self.createUserAgreementWindow()
+
+        self._user_agreement_window.show()
+
+    @pyqtSlot(bool)
+    def didAgree(self, userChoice):
+        if userChoice:
+            Logger.log("i", "User agreed to the user agreement")
+            Preferences.getInstance().setValue("general/accepted_user_agreement", True)
+            self._user_agreement_window.hide()
+        else:
+            Logger.log("i", "User did NOT agree to the user agreement")
+            Preferences.getInstance().setValue("general/accepted_user_agreement", False)
+            CuraApplication.getInstance().quit()
+        CuraApplication.getInstance().setNeedToShowUserAgreement(False)
+
+    def createUserAgreementWindow(self):
+        path = os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), "UserAgreement.qml")
+        self._user_agreement_window = Application.getInstance().createQmlComponent(path, {"manager": self})

plugins/UserAgreementPlugin/UserAgreement.qml

@@ -0,0 +1,64 @@
+// Copyright (c) 2017 Ultimaker B.V.
+// Cura is released under the terms of the LGPLv3 or higher.
+
+import QtQuick 2.2
+import QtQuick.Controls 1.4
+
+import UM 1.3 as UM
+
+UM.Dialog
+{
+    id: baseDialog
+    minimumWidth: Math.floor(UM.Theme.getSize("modal_window_minimum").width * 0.75)
+    minimumHeight: Math.floor(UM.Theme.getSize("modal_window_minimum").height * 0.5)
+    width: minimumWidth
+    height: minimumHeight
+    title: catalog.i18nc("@title:window", "User Agreement")
+
+    TextArea
+    {
+        anchors.top: parent.top
+        width: parent.width
+        anchors.bottom: buttonRow.top
+        text: ' <center><h3>DISCLAIMER BY ULTIMAKER</h3></center>
+                <p>PLEASE READ THIS DISCLAIMER CAREFULLY.</p>
+                <p>EXCEPT WHEN OTHERWISE STATED IN WRITING, ULTIMAKER PROVIDES ANY ULTIMAKER SOFTWARE OR THIRD PARTY SOFTWARE “AS IS” WITHOUT WARRANTY OF ANY KIND. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF ULTIMAKER SOFTWARE IS WITH YOU.</p>
+                <p>UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING, IN NO EVENT WILL ULTIMAKER BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE ANY ULTIMAKER SOFTWARE OR THIRD PARTY SOFTWARE.</p>
+                '
+        readOnly: true;
+        textFormat: TextEdit.RichText
+    }
+
+    Item
+    {
+        id: buttonRow
+        anchors.bottom: parent.bottom
+        width: parent.width
+        anchors.bottomMargin: UM.Theme.getSize("default_margin").height
+
+        UM.I18nCatalog { id: catalog; name:"cura" }
+
+        Button
+        {
+            anchors.right: parent.right
+            text: catalog.i18nc("@action:button", "I understand and agree")
+            onClicked: {
+                manager.didAgree(true)
+            }
+        }
+
+        Button
+        {
+            anchors.left: parent.left
+            text: catalog.i18nc("@action:button", "I don't agree")
+            onClicked: {
+                manager.didAgree(false)
+            }
+        }
+
+    }
+
+    onClosing: {
+        manager.didAgree(false)
+    }
+}

plugins/UserAgreementPlugin/__init__.py

@@ -0,0 +1,10 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from . import UserAgreement
+
+def getMetaData():
+    return {}
+
+def register(app):
+    return {"extension": UserAgreement.UserAgreement()}

plugins/UserAgreementPlugin/plugin.json

@@ -0,0 +1,8 @@
+{
+    "name": "UserAgreement",
+    "author": "Ultimaker B.V.",
+    "version": "1.0.0",
+    "description": "Ask the user once if he/she agrees with our license",
+    "api": 4,
+    "i18n-catalog": "cura"
+}

plugins/VersionUpgrade/VersionUpgrade30to31/VersionUpgrade30to31.py

@@ -0,0 +1,227 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+import configparser #To parse preference files.
+import io #To serialise the preference files afterwards.
+import os
+from urllib.parse import quote_plus
+
+from UM.Resources import Resources
+from UM.VersionUpgrade import VersionUpgrade #We're inheriting from this.
+
+from cura.CuraApplication import CuraApplication
+
+
+# a list of all legacy "Not Supported" quality profiles
+_OLD_NOT_SUPPORTED_PROFILES = [
+    "um2p_pp_0.25_normal",
+    "um2p_tpu_0.8_normal",
+    "um3_bb0.4_ABS_Fast_Print",
+    "um3_bb0.4_ABS_Superdraft_Print",
+    "um3_bb0.4_CPEP_Fast_Print",
+    "um3_bb0.4_CPEP_Superdraft_Print",
+    "um3_bb0.4_CPE_Fast_Print",
+    "um3_bb0.4_CPE_Superdraft_Print",
+    "um3_bb0.4_Nylon_Fast_Print",
+    "um3_bb0.4_Nylon_Superdraft_Print",
+    "um3_bb0.4_PC_Fast_Print",
+    "um3_bb0.4_PLA_Fast_Print",
+    "um3_bb0.4_PLA_Superdraft_Print",
+    "um3_bb0.4_PP_Fast_Print",
+    "um3_bb0.4_PP_Superdraft_Print",
+    "um3_bb0.4_TPU_Fast_Print",
+    "um3_bb0.4_TPU_Superdraft_Print",
+    "um3_bb0.8_ABS_Fast_Print",
+    "um3_bb0.8_ABS_Superdraft_Print",
+    "um3_bb0.8_CPEP_Fast_Print",
+    "um3_bb0.8_CPEP_Superdraft_Print",
+    "um3_bb0.8_CPE_Fast_Print",
+    "um3_bb0.8_CPE_Superdraft_Print",
+    "um3_bb0.8_Nylon_Fast_Print",
+    "um3_bb0.8_Nylon_Superdraft_Print",
+    "um3_bb0.8_PC_Fast_Print",
+    "um3_bb0.8_PC_Superdraft_Print",
+    "um3_bb0.8_PLA_Fast_Print",
+    "um3_bb0.8_PLA_Superdraft_Print",
+    "um3_bb0.8_PP_Fast_Print",
+    "um3_bb0.8_PP_Superdraft_Print",
+    "um3_bb0.8_TPU_Fast_print",
+    "um3_bb0.8_TPU_Superdraft_Print",
+]
+
+
+# Some containers have their specific empty containers, those need to be set correctly.
+_EMPTY_CONTAINER_DICT = {
+    "1": "empty_quality_changes",
+    "2": "empty_quality",
+    "3": "empty_material",
+    "4": "empty_variant",
+}
+
+
+class VersionUpgrade30to31(VersionUpgrade):
+    ##  Gets the version number from a CFG file in Uranium's 3.0 format.
+    #
+    #   Since the format may change, this is implemented for the 3.0 format only
+    #   and needs to be included in the version upgrade system rather than
+    #   globally in Uranium.
+    #
+    #   \param serialised The serialised form of a CFG file.
+    #   \return The version number stored in the CFG file.
+    #   \raises ValueError The format of the version number in the file is
+    #   incorrect.
+    #   \raises KeyError The format of the file is incorrect.
+    def getCfgVersion(self, serialised):
+        parser = configparser.ConfigParser(interpolation = None)
+        parser.read_string(serialised)
+        format_version = int(parser.get("general", "version")) #Explicitly give an exception when this fails. That means that the file format is not recognised.
+        setting_version = int(parser.get("metadata", "setting_version", fallback = 0))
+        return format_version * 1000000 + setting_version
+
+    ##  Upgrades a preferences file from version 3.0 to 3.1.
+    #
+    #   \param serialised The serialised form of a preferences file.
+    #   \param filename The name of the file to upgrade.
+    def upgradePreferences(self, serialised, filename):
+        parser = configparser.ConfigParser(interpolation=None)
+        parser.read_string(serialised)
+
+        # Update version numbers
+        if "general" not in parser:
+            parser["general"] = {}
+        parser["general"]["version"] = "5"
+        if "metadata" not in parser:
+            parser["metadata"] = {}
+        parser["metadata"]["setting_version"] = "4"
+
+        # Re-serialise the file.
+        output = io.StringIO()
+        parser.write(output)
+        return [filename], [output.getvalue()]
+
+    ##  Upgrades the given instance container file from version 3.0 to 3.1.
+    #
+    #   \param serialised The serialised form of the container file.
+    #   \param filename The name of the file to upgrade.
+    def upgradeInstanceContainer(self, serialised, filename):
+        parser = configparser.ConfigParser(interpolation=None)
+        parser.read_string(serialised)
+
+        for each_section in ("general", "metadata"):
+            if not parser.has_section(each_section):
+                parser.add_section(each_section)
+
+        # Copy global quality changes to extruder quality changes for single extrusion machines
+        if parser["metadata"]["type"] == "quality_changes":
+            all_quality_changes = self._getSingleExtrusionMachineQualityChanges(parser)
+            # Note that DO NOT!!! use the quality_changes returned from _getSingleExtrusionMachineQualityChanges().
+            # Those are loaded from the hard drive which are original files that haven't been upgraded yet.
+            # NOTE 2: The number can be 0 or 1 depends on whether you are loading it from the qualities folder or
+            #         from a project file. When you load from a project file, the custom profile may not be in cura
+            #         yet, so you will get 0.
+            if len(all_quality_changes) <= 1 and not parser.has_option("metadata", "extruder"):
+                self._createExtruderQualityChangesForSingleExtrusionMachine(filename, parser)
+
+        # Update version numbers
+        parser["general"]["version"] = "2"
+        parser["metadata"]["setting_version"] = "4"
+
+        # Re-serialise the file.
+        output = io.StringIO()
+        parser.write(output)
+        return [filename], [output.getvalue()]
+
+
+    ##  Upgrades a container stack from version 3.0 to 3.1.
+    #
+    #   \param serialised The serialised form of a container stack.
+    #   \param filename The name of the file to upgrade.
+    def upgradeStack(self, serialised, filename):
+        parser = configparser.ConfigParser(interpolation=None)
+        parser.read_string(serialised)
+
+        for each_section in ("general", "metadata"):
+            if not parser.has_section(each_section):
+                parser.add_section(each_section)
+
+        # change "not supported" quality profiles to empty because they no longer exist
+        if parser.has_section("containers"):
+            if parser.has_option("containers", "2"):
+                quality_profile_id = parser["containers"]["2"]
+                if quality_profile_id in _OLD_NOT_SUPPORTED_PROFILES:
+                    parser["containers"]["2"] = "empty_quality"
+
+            # fix empty containers
+            for key, specific_empty_container in _EMPTY_CONTAINER_DICT.items():
+                if parser.has_option("containers", key) and parser["containers"][key] == "empty":
+                    parser["containers"][key] = specific_empty_container
+
+        # Update version numbers
+        if "general" not in parser:
+            parser["general"] = {}
+        parser["general"]["version"] = "3"
+
+        if "metadata" not in parser:
+            parser["metadata"] = {}
+        parser["metadata"]["setting_version"] = "4"
+
+        # Re-serialise the file.
+        output = io.StringIO()
+        parser.write(output)
+        return [filename], [output.getvalue()]
+
+    def _getSingleExtrusionMachineQualityChanges(self, quality_changes_container):
+        quality_changes_dir = Resources.getPath(CuraApplication.ResourceTypes.QualityInstanceContainer)
+        quality_changes_containers = []
+
+        for item in os.listdir(quality_changes_dir):
+            file_path = os.path.join(quality_changes_dir, item)
+            if not os.path.isfile(file_path):
+                continue
+
+            parser = configparser.ConfigParser()
+            try:
+                parser.read([file_path])
+            except:
+                # skip, it is not a valid stack file
+                continue
+
+            if not parser.has_option("metadata", "type"):
+                continue
+            if "quality_changes" != parser["metadata"]["type"]:
+                continue
+
+            if not parser.has_option("general", "name"):
+                continue
+            if quality_changes_container["general"]["name"] != parser["general"]["name"]:
+                continue
+
+            quality_changes_containers.append(parser)
+
+        return quality_changes_containers
+
+    def _createExtruderQualityChangesForSingleExtrusionMachine(self, filename, global_quality_changes):
+        suffix = "_" + quote_plus(global_quality_changes["general"]["name"].lower())
+        machine_name = os.path.os.path.basename(filename).replace(".inst.cfg", "").replace(suffix, "")
+        new_filename = machine_name + "_" + "fdmextruder" + suffix
+
+        extruder_quality_changes_parser = configparser.ConfigParser()
+        extruder_quality_changes_parser.add_section("general")
+        extruder_quality_changes_parser["general"]["version"] = str(2)
+        extruder_quality_changes_parser["general"]["name"] = global_quality_changes["general"]["name"]
+        extruder_quality_changes_parser["general"]["definition"] = global_quality_changes["general"]["definition"]
+
+        extruder_quality_changes_parser.add_section("metadata")
+        extruder_quality_changes_parser["metadata"]["quality_type"] = global_quality_changes["metadata"]["quality_type"]
+        extruder_quality_changes_parser["metadata"]["type"] = global_quality_changes["metadata"]["type"]
+        extruder_quality_changes_parser["metadata"]["setting_version"] = str(4)
+        extruder_quality_changes_parser["metadata"]["extruder"] = "fdmextruder"
+
+        extruder_quality_changes_output = io.StringIO()
+        extruder_quality_changes_parser.write(extruder_quality_changes_output)
+        extruder_quality_changes_filename = quote_plus(new_filename) + ".inst.cfg"
+
+        quality_changes_dir = Resources.getPath(CuraApplication.ResourceTypes.QualityInstanceContainer)
+
+        with open(os.path.join(quality_changes_dir, extruder_quality_changes_filename), "w") as f:
+            f.write(extruder_quality_changes_output.getvalue())

plugins/VersionUpgrade/VersionUpgrade30to31/__init__.py

@@ -0,0 +1,56 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from . import VersionUpgrade30to31
+
+upgrade = VersionUpgrade30to31.VersionUpgrade30to31()
+
+def getMetaData():
+    return {
+        "version_upgrade": {
+            # From                    To                       Upgrade function
+            ("preferences", 5000003): ("preferences", 5000004, upgrade.upgradePreferences),
+
+            ("machine_stack", 3000003):     ("machine_stack", 3000004,     upgrade.upgradeStack),
+            ("extruder_train", 3000003):    ("extruder_train", 3000004,    upgrade.upgradeStack),
+
+            ("quality_changes", 2000003):    ("quality_changes", 2000004,    upgrade.upgradeInstanceContainer),
+            ("user", 2000003):               ("user", 2000004,               upgrade.upgradeInstanceContainer),
+            ("quality", 2000003):            ("quality", 2000004,            upgrade.upgradeInstanceContainer),
+            ("definition_changes", 2000003): ("definition_changes", 2000004, upgrade.upgradeInstanceContainer),
+            ("variant", 2000003):            ("variant", 2000004,            upgrade.upgradeInstanceContainer)
+        },
+        "sources": {
+            "preferences": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"."}
+            },
+            "machine_stack": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./machine_instances"}
+            },
+            "extruder_train": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./extruders"}
+            },
+            "quality_changes": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./quality"}
+            },
+            "user": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./user"}
+            },
+            "definition_changes": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./definition_changes"}
+            },
+            "variant": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./variants"}
+            }
+        }
+    }
+
+def register(app):
+    return { "version_upgrade": upgrade }

plugins/VersionUpgrade/VersionUpgrade30to31/plugin.json

@@ -0,0 +1,8 @@
+ {
+    "name": "Version Upgrade 3.0 to 3.1",
+    "author": "Ultimaker B.V.",
+    "version": "1.0.0",
+    "description": "Upgrades configurations from Cura 3.0 to Cura 3.1.",
+    "api": 4,
+    "i18n-catalog": "cura"
+}

plugins/XRayView/XRayView.py

@@ -56,6 +56,7 @@ class XRayView(View):
                 # Currently the RenderPass constructor requires a size > 0
                 # This should be fixed in RenderPass's constructor.
                 self._xray_pass = XRayPass.XRayPass(1, 1)
+
             self.getRenderer().addRenderPass(self._xray_pass)
 
             if not self._xray_composite_shader:
@@ -74,5 +75,6 @@ class XRayView(View):
             self._composite_pass.setCompositeShader(self._xray_composite_shader)
 
         if event.type == Event.ViewDeactivateEvent:
+            self.getRenderer().removeRenderPass(self._xray_pass)
             self._composite_pass.setLayerBindings(self._old_layer_bindings)
             self._composite_pass.setCompositeShader(self._old_composite_shader)

plugins/XmlMaterialProfile/XmlMaterialProfile.py

@@ -39,7 +39,7 @@ class XmlMaterialProfile(InstanceContainer):
     @classmethod
     def xmlVersionToSettingVersion(cls, xml_version: str) -> int:
         if xml_version == "1.3":
-            return 3
+            return CuraApplication.SettingVersion
         return 0 #Older than 1.3.
 
     def getInheritedFiles(self):
@@ -399,7 +399,7 @@ class XmlMaterialProfile(InstanceContainer):
     def getVersionFromSerialized(cls, serialized: str) -> Optional[int]:
         data = ET.fromstring(serialized)
 
-        version = 1
+        version = XmlMaterialProfile.Version
         # get setting version
         if "version" in data.attrib:
             setting_version = cls.xmlVersionToSettingVersion(data.attrib["version"])
@@ -409,11 +409,11 @@ class XmlMaterialProfile(InstanceContainer):
         return version * 1000000 + setting_version
 
     ##  Overridden from InstanceContainer
-    def deserialize(self, serialized):
+    def deserialize(self, serialized, file_name = None):
         containers_to_add = []
         # update the serialized data first
         from UM.Settings.Interfaces import ContainerInterface
-        serialized = ContainerInterface.deserialize(self, serialized)
+        serialized = ContainerInterface.deserialize(self, serialized, file_name)
 
         try:
             data = ET.fromstring(serialized)
@@ -502,8 +502,6 @@ class XmlMaterialProfile(InstanceContainer):
             elif key in self.__unmapped_settings:
                 if key == "hardware compatible":
                     common_compatibility = self._parseCompatibleValue(entry.text)
-            else:
-                Logger.log("d", "Unsupported material setting %s", key)
         self._cached_values = common_setting_values # from InstanceContainer ancestor
 
         meta_data["compatible"] = common_compatibility

plugins/XmlMaterialProfile/XmlMaterialUpgrader.py

@@ -5,24 +5,16 @@ import xml.etree.ElementTree as ET
 
 from UM.VersionUpgrade import VersionUpgrade
 
+from cura.CuraApplication import CuraApplication
+from .XmlMaterialProfile import XmlMaterialProfile
+
 
 class XmlMaterialUpgrader(VersionUpgrade):
     def getXmlVersion(self, serialized):
-        data = ET.fromstring(serialized)
+        return XmlMaterialProfile.getVersionFromSerialized(serialized)
-
-        version = 1
-        # get setting version
-        if "version" in data.attrib:
-            setting_version = self._xmlVersionToSettingVersion(data.attrib["version"])
-        else:
-            setting_version = self._xmlVersionToSettingVersion("1.2")
-
-        return version * 1000000 + setting_version
 
     def _xmlVersionToSettingVersion(self, xml_version: str) -> int:
-        if xml_version == "1.3":
+        return XmlMaterialProfile.xmlVersionToSettingVersion(xml_version)
-            return 2
-        return 0 #Older than 1.3.
 
     def upgradeMaterial(self, serialised, filename):
         data = ET.fromstring(serialised)

plugins/XmlMaterialProfile/__init__.py

@@ -19,7 +19,7 @@ def getMetaData():
             "mimetype": "application/x-ultimaker-material-profile"
         },
         "version_upgrade": {
-            ("materials", 1000000): ("materials", 1000003, upgrader.upgradeMaterial),
+            ("materials", 1000000): ("materials", 1000004, upgrader.upgradeMaterial),
         },
         "sources": {
             "materials": {

resources/definitions/101Hero.def.json

@@ -6,10 +6,6 @@
         "visible": true,
         "author": "rikky",
         "manufacturer": "101Hero",
-        "machine_extruder_trains":
-        {
-            "0": "fdmextruder"
-        },
         "file_formats": "text/x-gcode",
         "platform": "101hero-platform.stl",
         "supports_usb_connection": true

resources/definitions/3dator.def.json

@@ -9,11 +9,7 @@
         "file_formats": "text/x-gcode",
         "icon": "icon_ultimaker2",
         "supports_usb_connection": true,
-        "platform": "3dator_platform.stl",
+        "platform": "3dator_platform.stl"
-        "machine_extruder_trains":
-        {
-            "0": "fdmextruder"
-        }
     },
 
     "overrides": {
@@ -28,7 +24,6 @@
         "layer_height": { "default_value": 0.2 },
         "speed_print": { "default_value": 50 },
         "speed_infill": { "default_value": 60 },
-        "machine_extruder_count": { "default_value": 1 },
         "machine_heated_bed": { "default_value": true },
         "machine_center_is_zero": { "default_value": false },
         "machine_height": { "default_value": 260 },

resources/definitions/builder_premium_large.def.json

@@ -0,0 +1,117 @@
+{
+    "id": "builder_premium_large",
+    "version": 2,
+    "name": "Builder Premium Large",
+    "inherits": "fdmprinter",
+    "metadata": {
+        "visible": true,
+        "author": "Builder SZ",
+        "manufacturer": "Builder",
+        "category": "Other",
+        "quality_definition": "builder_premium_small",
+        "file_formats": "text/x-gcode",
+        "platform": "builder_premium_platform.stl",
+        "platform_offset": [-126, -36, 117],
+        "has_machine_quality": true,
+        "preferred_quality": "*Normal*",
+        "machine_extruder_trains":
+        {
+            "0": "builder_premium_large_rear",
+            "1": "builder_premium_large_front"
+        }
+    },
+	
+	
+	
+    "overrides": {
+        "machine_name": { "default_value": "Builder Premium Large" },
+        "machine_heated_bed": { "default_value": true },
+        "machine_width": { "default_value": 215 },
+        "machine_height": { "default_value": 600 },
+        "machine_depth": { "default_value": 205 },
+        "material_diameter": { "default_value": 1.75 },
+
+        "infill_pattern": {"value": "'triangles'" },
+        "infill_before_walls": {"value": false },
+
+        "default_material_print_temperature": { "value": "215" },
+        "material_print_temperature_layer_0": { "value": "material_print_temperature + 5" },
+        "material_standby_temperature": { "value": "material_print_temperature" },
+		
+        "switch_extruder_retraction_speeds": {"default_value": 15 },
+        "switch_extruder_retraction_speed": {"default_value": 15 },
+        "switch_extruder_prime_speed": {"default_value": 15 },
+        "switch_extruder_retraction_amount": {"value": 1 },
+
+        "speed_travel": { "value": "100" },
+        "speed_layer_0": { "value": "20" },
+        "speed_prime_tower": { "value": "speed_topbottom" },
+        "speed_print": { "value": "40" },
+        "speed_support": { "value": "speed_wall_0" },
+        "speed_support_interface": { "value": "speed_topbottom" },
+        "speed_topbottom": { "value": "math.ceil(speed_print * 20 / 35)" },
+        "speed_wall": { "value": "math.ceil(speed_print * 30 / 40)" },
+        "speed_wall_0": { "value": "math.ceil(speed_wall * 20 / 25)" },
+        "speed_wall_x": { "value": "speed_wall" },
+
+        "prime_tower_position_x": { "default_value": 175 },
+        "prime_tower_position_y": { "default_value": 178 },
+        "prime_tower_wipe_enabled": { "default_value": false },
+        "prime_tower_min_volume": { "default_value": 50 },
+        "dual_pre_wipe": { "default_value": false },
+		
+        "prime_blob_enable": { "enabled": true },
+		
+        "acceleration_enabled": { "value": "True" },
+        "acceleration_layer_0": { "value": "acceleration_topbottom" },
+        "acceleration_prime_tower": { "value": "math.ceil(acceleration_print * 2000 / 4000)" },
+        "acceleration_print": { "value": "3000" },
+        "acceleration_support": { "value": "math.ceil(acceleration_print * 2000 / 4000)" },
+        "acceleration_support_interface": { "value": "acceleration_topbottom" },
+        "acceleration_topbottom": { "value": "math.ceil(acceleration_print * 1000 / 3000)" },
+        "acceleration_travel": { "value": "acceleration_print" },
+        "acceleration_wall": { "value": "math.ceil(acceleration_print * 1000 / 3000)" },
+        "acceleration_wall_0": { "value": "math.ceil(acceleration_wall * 1000 / 1000)" },
+		
+        "cool_fan_full_at_height": { "value": "layer_height_0 + 2 * layer_height" },
+        "cool_min_layer_time": { "default_value": 10 },
+
+        "jerk_enabled": { "value": "True" },
+        "jerk_layer_0": { "value": "jerk_topbottom" },
+        "jerk_prime_tower": { "value": "math.ceil(jerk_print * 15 / 25)" },
+        "jerk_print": { "value": "25" },
+        "jerk_support": { "value": "math.ceil(jerk_print * 15 / 25)" },
+        "jerk_support_interface": { "value": "jerk_topbottom" },
+        "jerk_topbottom": { "value": "math.ceil(jerk_print * 5 / 25)" },
+        "jerk_wall": { "value": "math.ceil(jerk_print * 10 / 25)" },
+        "jerk_wall_0": { "value": "math.ceil(jerk_wall * 5 / 10)" },
+		
+        "wall_thickness": { "value": "1.2" },
+		
+        "retraction_amount": { "default_value": 3 },
+        "retraction_speed": { "default_value": 15 },
+        "retraction_retract_speed": { "default_value": 15 },
+        "retraction_prime_speed": { "default_value": 15 },
+        "travel_retract_before_outer_wall": { "default_value": true },
+        "skin_overlap": { "value": "15" },
+        "adhesion_type": { "default_value": "skirt" },
+        "machine_nozzle_heat_up_speed": { "default_value": 2 },
+        "machine_nozzle_cool_down_speed": { "default_value": 2 },
+        "machine_head_polygon": { "default_value": [[-75, -18],[-75, 35],[18, 35],[18, -18]] },
+        "gantry_height": { "default_value": 55 },
+        "machine_max_feedrate_x": { "default_value": 300 },
+        "machine_max_feedrate_y": { "default_value": 300 },
+        "machine_max_feedrate_z": { "default_value": 40 },
+        "machine_max_acceleration_z": { "default_value": 500 },
+        "machine_acceleration": { "default_value": 1000 },
+        "machine_max_jerk_xy": { "default_value": 10 },
+        "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
+        "machine_start_gcode": {
+            "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG1 Z15.0 F9000 ;move the platform down 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E15 ;extrude 15mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\nT0 ;Start with Rear Extruder\n;Put printing message on LCD screen\nM117 Printing..."
+        },
+        "machine_end_gcode": {
+            "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
+        },
+        "machine_extruder_count": { "default_value": 2 }
+    }
+}

resources/definitions/builder_premium_medium.def.json

@@ -0,0 +1,117 @@
+{
+    "id": "builder_premium_medium",
+    "version": 2,
+    "name": "Builder Premium Medium",
+    "inherits": "fdmprinter",
+    "metadata": {
+        "visible": true,
+        "author": "Builder SZ",
+        "manufacturer": "Builder",
+        "category": "Other",
+        "quality_definition": "builder_premium_small",
+        "file_formats": "text/x-gcode",
+        "platform": "builder_premium_platform.stl",
+        "platform_offset": [-126, -36, 117],
+        "has_machine_quality": true,
+        "preferred_quality": "*Normal*",
+        "machine_extruder_trains":
+        {
+            "0": "builder_premium_medium_rear",
+            "1": "builder_premium_medium_front"
+        }
+    },
+	
+	
+	
+    "overrides": {
+        "machine_name": { "default_value": "Builder Premium Medium" },
+        "machine_heated_bed": { "default_value": true },
+        "machine_width": { "default_value": 215 },
+        "machine_height": { "default_value": 400 },
+        "machine_depth": { "default_value": 205 },
+        "material_diameter": { "default_value": 1.75 },
+
+        "infill_pattern": {"value": "'triangles'" },
+        "infill_before_walls": {"value": false },
+
+        "default_material_print_temperature": { "value": "215" },
+        "material_print_temperature_layer_0": { "value": "material_print_temperature + 5" },
+        "material_standby_temperature": { "value": "material_print_temperature" },
+		
+        "switch_extruder_retraction_speeds": {"default_value": 15 },
+        "switch_extruder_retraction_speed": {"default_value": 15 },
+        "switch_extruder_prime_speed": {"default_value": 15 },
+        "switch_extruder_retraction_amount": {"value": 1 },
+
+        "speed_travel": { "value": "100" },
+        "speed_layer_0": { "value": "20" },
+        "speed_prime_tower": { "value": "speed_topbottom" },
+        "speed_print": { "value": "40" },
+        "speed_support": { "value": "speed_wall_0" },
+        "speed_support_interface": { "value": "speed_topbottom" },
+        "speed_topbottom": { "value": "math.ceil(speed_print * 20 / 35)" },
+        "speed_wall": { "value": "math.ceil(speed_print * 30 / 40)" },
+        "speed_wall_0": { "value": "math.ceil(speed_wall * 20 / 25)" },
+        "speed_wall_x": { "value": "speed_wall" },
+
+        "prime_tower_position_x": { "default_value": 175 },
+        "prime_tower_position_y": { "default_value": 178 },
+        "prime_tower_wipe_enabled": { "default_value": false },
+        "prime_tower_min_volume": { "default_value": 50 },
+        "dual_pre_wipe": { "default_value": false },
+		
+        "prime_blob_enable": { "enabled": true },
+		
+        "acceleration_enabled": { "value": "True" },
+        "acceleration_layer_0": { "value": "acceleration_topbottom" },
+        "acceleration_prime_tower": { "value": "math.ceil(acceleration_print * 2000 / 4000)" },
+        "acceleration_print": { "value": "3000" },
+        "acceleration_support": { "value": "math.ceil(acceleration_print * 2000 / 4000)" },
+        "acceleration_support_interface": { "value": "acceleration_topbottom" },
+        "acceleration_topbottom": { "value": "math.ceil(acceleration_print * 1000 / 3000)" },
+        "acceleration_travel": { "value": "acceleration_print" },
+        "acceleration_wall": { "value": "math.ceil(acceleration_print * 1000 / 3000)" },
+        "acceleration_wall_0": { "value": "math.ceil(acceleration_wall * 1000 / 1000)" },
+		
+        "cool_fan_full_at_height": { "value": "layer_height_0 + 2 * layer_height" },
+        "cool_min_layer_time": { "default_value": 10 },
+
+        "jerk_enabled": { "value": "True" },
+        "jerk_layer_0": { "value": "jerk_topbottom" },
+        "jerk_prime_tower": { "value": "math.ceil(jerk_print * 15 / 25)" },
+        "jerk_print": { "value": "25" },
+        "jerk_support": { "value": "math.ceil(jerk_print * 15 / 25)" },
+        "jerk_support_interface": { "value": "jerk_topbottom" },
+        "jerk_topbottom": { "value": "math.ceil(jerk_print * 5 / 25)" },
+        "jerk_wall": { "value": "math.ceil(jerk_print * 10 / 25)" },
+        "jerk_wall_0": { "value": "math.ceil(jerk_wall * 5 / 10)" },
+		
+        "wall_thickness": { "value": "1.2" },
+		
+        "retraction_amount": { "default_value": 3 },
+        "retraction_speed": { "default_value": 15 },
+        "retraction_retract_speed": { "default_value": 15 },
+        "retraction_prime_speed": { "default_value": 15 },
+        "travel_retract_before_outer_wall": { "default_value": true },
+        "skin_overlap": { "value": "15" },
+        "adhesion_type": { "default_value": "skirt" },
+        "machine_nozzle_heat_up_speed": { "default_value": 2 },
+        "machine_nozzle_cool_down_speed": { "default_value": 2 },
+        "machine_head_polygon": { "default_value": [[-75, -18],[-75, 35],[18, 35],[18, -18]] },
+        "gantry_height": { "default_value": 55 },
+        "machine_max_feedrate_x": { "default_value": 300 },
+        "machine_max_feedrate_y": { "default_value": 300 },
+        "machine_max_feedrate_z": { "default_value": 40 },
+        "machine_max_acceleration_z": { "default_value": 500 },
+        "machine_acceleration": { "default_value": 1000 },
+        "machine_max_jerk_xy": { "default_value": 10 },
+        "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
+        "machine_start_gcode": {
+            "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG1 Z15.0 F9000 ;move the platform down 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E15 ;extrude 15mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\nT0 ;Start with Rear Extruder\n;Put printing message on LCD screen\nM117 Printing..."
+        },
+        "machine_end_gcode": {
+            "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
+        },
+        "machine_extruder_count": { "default_value": 2 }
+    }
+}

resources/definitions/builder_premium_small.def.json

@@ -0,0 +1,116 @@
+{
+    "id": "builder_premium_small",
+    "version": 2,
+    "name": "Builder Premium Small",
+    "inherits": "fdmprinter",
+    "metadata": {
+        "visible": true,
+        "author": "Builder SZ",
+        "manufacturer": "Builder",
+        "category": "Other",
+        "file_formats": "text/x-gcode",
+        "platform": "builder_premium_platform.stl",
+        "platform_offset": [-126, -36, 117],
+        "has_machine_quality": true,
+        "preferred_quality": "*Normal*",
+        "machine_extruder_trains":
+        {
+            "0": "builder_premium_small_rear",
+            "1": "builder_premium_small_front"
+        }
+    },
+	
+	
+	
+    "overrides": {
+        "machine_name": { "default_value": "Builder Premium Small" },
+        "machine_heated_bed": { "default_value": true },
+        "machine_width": { "default_value": 215 },
+        "machine_height": { "default_value": 200 },
+        "machine_depth": { "default_value": 205 },
+        "material_diameter": { "default_value": 1.75 },
+
+        "infill_pattern": {"value": "'triangles'" },
+        "infill_before_walls": {"value": false },
+
+        "default_material_print_temperature": { "value": "215" },
+        "material_print_temperature_layer_0": { "value": "material_print_temperature + 5" },
+        "material_standby_temperature": { "value": "material_print_temperature" },
+		
+        "switch_extruder_retraction_speeds": {"default_value": 15 },
+        "switch_extruder_retraction_speed": {"default_value": 15 },
+        "switch_extruder_prime_speed": {"default_value": 15 },
+        "switch_extruder_retraction_amount": {"value": 1 },
+
+        "speed_travel": { "value": "100" },
+        "speed_layer_0": { "value": "20" },
+        "speed_prime_tower": { "value": "speed_topbottom" },
+        "speed_print": { "value": "40" },
+        "speed_support": { "value": "speed_wall_0" },
+        "speed_support_interface": { "value": "speed_topbottom" },
+        "speed_topbottom": { "value": "math.ceil(speed_print * 20 / 35)" },
+        "speed_wall": { "value": "math.ceil(speed_print * 30 / 40)" },
+        "speed_wall_0": { "value": "math.ceil(speed_wall * 20 / 25)" },
+        "speed_wall_x": { "value": "speed_wall" },
+
+        "prime_tower_position_x": { "default_value": 175 },
+        "prime_tower_position_y": { "default_value": 178 },
+        "prime_tower_wipe_enabled": { "default_value": false },
+        "prime_tower_min_volume": { "default_value": 50 },
+        "dual_pre_wipe": { "default_value": false },
+		
+        "prime_blob_enable": { "enabled": true },
+		
+        "acceleration_enabled": { "value": "True" },
+        "acceleration_layer_0": { "value": "acceleration_topbottom" },
+        "acceleration_prime_tower": { "value": "math.ceil(acceleration_print * 2000 / 4000)" },
+        "acceleration_print": { "value": "3000" },
+        "acceleration_support": { "value": "math.ceil(acceleration_print * 2000 / 4000)" },
+        "acceleration_support_interface": { "value": "acceleration_topbottom" },
+        "acceleration_topbottom": { "value": "math.ceil(acceleration_print * 1000 / 3000)" },
+        "acceleration_travel": { "value": "acceleration_print" },
+        "acceleration_wall": { "value": "math.ceil(acceleration_print * 1000 / 3000)" },
+        "acceleration_wall_0": { "value": "math.ceil(acceleration_wall * 1000 / 1000)" },
+		
+        "cool_fan_full_at_height": { "value": "layer_height_0 + 2 * layer_height" },
+        "cool_min_layer_time": { "default_value": 10 },
+
+        "jerk_enabled": { "value": "True" },
+        "jerk_layer_0": { "value": "jerk_topbottom" },
+        "jerk_prime_tower": { "value": "math.ceil(jerk_print * 15 / 25)" },
+        "jerk_print": { "value": "25" },
+        "jerk_support": { "value": "math.ceil(jerk_print * 15 / 25)" },
+        "jerk_support_interface": { "value": "jerk_topbottom" },
+        "jerk_topbottom": { "value": "math.ceil(jerk_print * 5 / 25)" },
+        "jerk_wall": { "value": "math.ceil(jerk_print * 10 / 25)" },
+        "jerk_wall_0": { "value": "math.ceil(jerk_wall * 5 / 10)" },
+		
+        "wall_thickness": { "value": "1.2" },
+		
+        "retraction_amount": { "default_value": 3 },
+        "retraction_speed": { "default_value": 15 },
+        "retraction_retract_speed": { "default_value": 15 },
+        "retraction_prime_speed": { "default_value": 15 },
+        "travel_retract_before_outer_wall": { "default_value": true },
+        "skin_overlap": { "value": "15" },
+        "adhesion_type": { "default_value": "skirt" },
+        "machine_nozzle_heat_up_speed": { "default_value": 2 },
+        "machine_nozzle_cool_down_speed": { "default_value": 2 },
+        "machine_head_polygon": { "default_value": [[-75, -18],[-75, 35],[18, 35],[18, -18]] },
+        "gantry_height": { "default_value": 55 },
+        "machine_max_feedrate_x": { "default_value": 300 },
+        "machine_max_feedrate_y": { "default_value": 300 },
+        "machine_max_feedrate_z": { "default_value": 40 },
+        "machine_max_acceleration_z": { "default_value": 500 },
+        "machine_acceleration": { "default_value": 1000 },
+        "machine_max_jerk_xy": { "default_value": 10 },
+        "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
+        "machine_start_gcode": {
+            "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG1 Z15.0 F9000 ;move the platform down 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E15 ;extrude 15mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\nT0 ;Start with Rear Extruder\n;Put printing message on LCD screen\nM117 Printing..."
+        },
+        "machine_end_gcode": {
+            "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
+        },
+        "machine_extruder_count": { "default_value": 2 }
+    }
+}