Merge branch 'master' into feature_firmware_updater

.gitignore

@@ -15,6 +15,7 @@ LC_MESSAGES
 .cache
 *.qmlc
 .mypy_cache
+.pytest_cache
 
 #MacOS
 .DS_Store
@@ -25,6 +26,7 @@ LC_MESSAGES
 *.lprof
 *~
 *.qm
+.directory
 .idea
 cura.desktop
 

Jenkinsfile

@@ -12,6 +12,30 @@ parallel_nodes(['linux && cura', 'windows && cura']) {
 
         // If any error occurs during building, we want to catch it and continue with the "finale" stage.
         catchError {
+            stage('Pre Checks') {
+                if (isUnix()) {
+                    // Check shortcut keys
+                    try {
+                        sh """
+                            echo 'Check for duplicate shortcut keys in all translation files.'
+                            ${env.CURA_ENVIRONMENT_PATH}/master/bin/python3 scripts/check_shortcut_keys.py
+                        """
+                    } catch(e) {
+                        currentBuild.result = "UNSTABLE"
+                    }
+
+                    // Check setting visibilities
+                    try {
+                        sh """
+                            echo 'Check for duplicate shortcut keys in all translation files.'
+                            ${env.CURA_ENVIRONMENT_PATH}/master/bin/python3 scripts/check_setting_visibility.py
+                        """
+                    } catch(e) {
+                        currentBuild.result = "UNSTABLE"
+                    }
+                }
+            }
+
             // Building and testing should happen in a subdirectory.
             dir('build') {
                 // Perform the "build". Since Uranium is Python code, this basically only ensures CMake is setup.
@@ -28,10 +52,53 @@ parallel_nodes(['linux && cura', 'windows && cura']) {
 
                 // Try and run the unit tests. If this stage fails, we consider the build to be "unstable".
                 stage('Unit Test') {
-                    try {
+                    if (isUnix()) {
-                        make('test')
+                        // For Linux to show everything
-                    } catch(e) {
+                        def branch = env.BRANCH_NAME
-                        currentBuild.result = "UNSTABLE"
+                        if(!fileExists("${env.CURA_ENVIRONMENT_PATH}/${branch}")) {
+                            branch = "master"
+                        }
+                        def uranium_dir = get_workspace_dir("Ultimaker/Uranium/${branch}")
+
+                        try {
+                            sh """
+                                cd ..
+                                export PYTHONPATH=.:"${uranium_dir}"
+                                ${env.CURA_ENVIRONMENT_PATH}/${branch}/bin/pytest -x --verbose --full-trace --capture=no ./tests
+                            """
+                        } catch(e) {
+                            currentBuild.result = "UNSTABLE"
+                        }
+                    }
+                    else {
+                        // For Windows
+                        try {
+                            // This also does code style checks.
+                            bat 'ctest -V'
+                        } catch(e) {
+                            currentBuild.result = "UNSTABLE"
+                        }
+                    }
+                }
+
+                stage('Code Style') {
+                    if (isUnix()) {
+                        // For Linux to show everything
+                        def branch = env.BRANCH_NAME
+                        if(!fileExists("${env.CURA_ENVIRONMENT_PATH}/${branch}")) {
+                            branch = "master"
+                        }
+                        def uranium_dir = get_workspace_dir("Ultimaker/Uranium/${branch}")
+
+                        try {
+                            sh """
+                                cd ..
+                                export PYTHONPATH=.:"${uranium_dir}"
+                                ${env.CURA_ENVIRONMENT_PATH}/${branch}/bin/python3 run_mypy.py
+                            """
+                        } catch(e) {
+                            currentBuild.result = "UNSTABLE"
+                        }
                     }
                 }
             }

cmake/CuraTests.cmake

@@ -34,7 +34,7 @@ function(cura_add_test)
     if (NOT ${test_exists})
         add_test(
             NAME ${_NAME}
-            COMMAND ${PYTHON_EXECUTABLE} -m pytest --junitxml=${CMAKE_BINARY_DIR}/junit-${_NAME}.xml ${_DIRECTORY}
+            COMMAND ${PYTHON_EXECUTABLE} -m pytest --verbose --full-trace --capture=no --no-print-log --junitxml=${CMAKE_BINARY_DIR}/junit-${_NAME}.xml ${_DIRECTORY}
         )
         set_tests_properties(${_NAME} PROPERTIES ENVIRONMENT LANG=C)
         set_tests_properties(${_NAME} PROPERTIES ENVIRONMENT "PYTHONPATH=${_PYTHONPATH}")

cura.desktop.in

@@ -13,6 +13,6 @@ TryExec=@CMAKE_INSTALL_FULL_BINDIR@/cura
 Icon=cura-icon
 Terminal=false
 Type=Application
-MimeType=application/sla;application/vnd.ms-3mfdocument;application/prs.wavefront-obj;image/bmp;image/gif;image/jpeg;image/png;model/x3d+xml;
+MimeType=model/stl;application/vnd.ms-3mfdocument;application/prs.wavefront-obj;image/bmp;image/gif;image/jpeg;image/png;model/x3d+xml;
 Categories=Graphics;
 Keywords=3D;Printing;Slicer;

cura.sharedmimeinfo

@@ -6,7 +6,7 @@
         <glob-deleteall/>
         <glob pattern="*.3mf"/>
     </mime-type>
-    <mime-type type="application/sla">
+    <mime-type type="model/stl">
         <comment>Computer-aided design and manufacturing format</comment>
         <icon name="unknown"/>
         <glob-deleteall/>

cura/BuildVolume.py

@@ -28,7 +28,7 @@ import copy
 
 from typing import List, Optional
 
-# Setting for clearance around the prime
+# Radius of disallowed area in mm around prime. I.e. how much distance to keep from prime position.
 PRIME_CLEARANCE = 6.5
 
 
@@ -479,8 +479,6 @@ class BuildVolume(SceneNode):
             maximum = Vector(max_w - bed_adhesion_size - 1, max_h - self._raft_thickness - self._extra_z_clearance, max_d - disallowed_area_size + bed_adhesion_size - 1)
         )
 
-        self._application.getController().getScene()._maximum_bounds = scale_to_max_bounds
-
         self.updateNodeBoundaryCheck()
 
     def getBoundingBox(self) -> AxisAlignedBox:
@@ -528,7 +526,7 @@ class BuildVolume(SceneNode):
     def _onStackChanged(self):
         if self._global_container_stack:
             self._global_container_stack.propertyChanged.disconnect(self._onSettingPropertyChanged)
-            extruders = ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())
+            extruders = ExtruderManager.getInstance().getActiveExtruderStacks()
             for extruder in extruders:
                 extruder.propertyChanged.disconnect(self._onSettingPropertyChanged)
 
@@ -536,7 +534,7 @@ class BuildVolume(SceneNode):
 
         if self._global_container_stack:
             self._global_container_stack.propertyChanged.connect(self._onSettingPropertyChanged)
-            extruders = ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())
+            extruders = ExtruderManager.getInstance().getActiveExtruderStacks()
             for extruder in extruders:
                 extruder.propertyChanged.connect(self._onSettingPropertyChanged)
 

cura/CameraImageProvider.py

@@ -19,5 +19,11 @@ class CameraImageProvider(QQuickImageProvider):
 
                 return image, QSize(15, 15)
             except AttributeError:
-                pass
+                try:
+                    image = output_device.activeCamera.getImage()
+
+                    return image, QSize(15, 15)
+                except AttributeError:
+                    pass
+
         return QImage(), QSize(15, 15)

cura/CuraApplication.py

@@ -13,6 +13,7 @@ from PyQt5.QtGui import QColor, QIcon
 from PyQt5.QtWidgets import QMessageBox
 from PyQt5.QtQml import qmlRegisterUncreatableType, qmlRegisterSingletonType, qmlRegisterType
 
+from UM.PluginError import PluginNotFoundError
 from UM.Scene.SceneNode import SceneNode
 from UM.Scene.Camera import Camera
 from UM.Math.Vector import Vector
@@ -67,9 +68,9 @@ from cura.Machines.Models.NozzleModel import NozzleModel
 from cura.Machines.Models.QualityProfilesDropDownMenuModel import QualityProfilesDropDownMenuModel
 from cura.Machines.Models.CustomQualityProfilesDropDownMenuModel import CustomQualityProfilesDropDownMenuModel
 from cura.Machines.Models.MultiBuildPlateModel import MultiBuildPlateModel
-from cura.Machines.Models.MaterialManagementModel import MaterialManagementModel
+from cura.Machines.Models.FavoriteMaterialsModel import FavoriteMaterialsModel
 from cura.Machines.Models.GenericMaterialsModel import GenericMaterialsModel
-from cura.Machines.Models.BrandMaterialsModel import BrandMaterialsModel
+from cura.Machines.Models.MaterialBrandsModel import MaterialBrandsModel
 from cura.Machines.Models.QualityManagementModel import QualityManagementModel
 from cura.Machines.Models.QualitySettingsModel import QualitySettingsModel
 from cura.Machines.Models.MachineManagementModel import MachineManagementModel
@@ -93,6 +94,7 @@ from . import CuraActions
 from cura.Scene import ZOffsetDecorator
 from . import CuraSplashScreen
 from . import CameraImageProvider
+from . import PrintJobPreviewImageProvider
 from . import MachineActionManager
 
 from cura.TaskManagement.OnExitCallbackManager import OnExitCallbackManager
@@ -112,7 +114,9 @@ from UM.FlameProfiler import pyqtSlot
 
 
 if TYPE_CHECKING:
-    from plugins.SliceInfoPlugin.SliceInfo import SliceInfo
+    from cura.Machines.MaterialManager import MaterialManager
+    from cura.Machines.QualityManager import QualityManager
+    from UM.Settings.EmptyInstanceContainer import EmptyInstanceContainer
 
 
 numpy.seterr(all = "ignore")
@@ -174,12 +178,12 @@ class CuraApplication(QtApplication):
 
         self._machine_action_manager = None
 
-        self.empty_container = None
+        self.empty_container = None  # type: EmptyInstanceContainer
-        self.empty_definition_changes_container = None
+        self.empty_definition_changes_container = None  # type: EmptyInstanceContainer
-        self.empty_variant_container = None
+        self.empty_variant_container = None  # type: EmptyInstanceContainer
-        self.empty_material_container = None
+        self.empty_material_container = None  # type: EmptyInstanceContainer
-        self.empty_quality_container = None
+        self.empty_quality_container = None  # type: EmptyInstanceContainer
-        self.empty_quality_changes_container = None
+        self.empty_quality_changes_container = None  # type: EmptyInstanceContainer
 
         self._variant_manager = None
         self._material_manager = None
@@ -215,7 +219,6 @@ class CuraApplication(QtApplication):
 
         self._message_box_callback = None
         self._message_box_callback_arguments = []
-        self._preferred_mimetype = ""
         self._i18n_catalog = None
 
         self._currently_loading_files = []
@@ -368,7 +371,7 @@ class CuraApplication(QtApplication):
         # Add empty variant, material and quality containers.
         # Since they are empty, they should never be serialized and instead just programmatically created.
         # We need them to simplify the switching between materials.
-        self.empty_container = cura.Settings.cura_empty_instance_containers.empty_container
+        self.empty_container = cura.Settings.cura_empty_instance_containers.empty_container  # type: EmptyInstanceContainer
 
         self._container_registry.addContainer(
             cura.Settings.cura_empty_instance_containers.empty_definition_changes_container)
@@ -429,6 +432,7 @@ class CuraApplication(QtApplication):
             # Readers & Writers:
             "GCodeWriter",
             "STLReader",
+            "3MFWriter",
 
             # Tools:
             "CameraTool",
@@ -481,7 +485,11 @@ class CuraApplication(QtApplication):
         preferences.addPreference("view/filter_current_build_plate", False)
         preferences.addPreference("cura/sidebar_collapsed", False)
 
-        self._need_to_show_user_agreement = not self.getPreferences().getValue("general/accepted_user_agreement")
+        preferences.addPreference("cura/favorite_materials", "")
+        preferences.addPreference("cura/expanded_brands", "")
+        preferences.addPreference("cura/expanded_types", "")
+
+        self._need_to_show_user_agreement = not preferences.getValue("general/accepted_user_agreement")
 
         for key in [
             "dialog_load_path",  # dialog_save_path is in LocalFileOutputDevicePlugin
@@ -495,15 +503,13 @@ class CuraApplication(QtApplication):
         self.applicationShuttingDown.connect(self.saveSettings)
         self.engineCreatedSignal.connect(self._onEngineCreated)
 
-        self.globalContainerStackChanged.connect(self._onGlobalContainerChanged)
-        self._onGlobalContainerChanged()
-
         self.getCuraSceneController().setActiveBuildPlate(0)  # Initialize
 
         CuraApplication.Created = True
 
     def _onEngineCreated(self):
         self._qml_engine.addImageProvider("camera", CameraImageProvider.CameraImageProvider())
+        self._qml_engine.addImageProvider("print_job_preview", PrintJobPreviewImageProvider.PrintJobPreviewImageProvider())
 
     @pyqtProperty(bool)
     def needToShowUserAgreement(self):
@@ -806,20 +812,20 @@ class CuraApplication(QtApplication):
             self._machine_manager = MachineManager(self)
         return self._machine_manager
 
-    def getExtruderManager(self, *args):
+    def getExtruderManager(self, *args) -> ExtruderManager:
         if self._extruder_manager is None:
             self._extruder_manager = ExtruderManager()
         return self._extruder_manager
 
-    def getVariantManager(self, *args):
+    def getVariantManager(self, *args) -> VariantManager:
         return self._variant_manager
 
     @pyqtSlot(result = QObject)
-    def getMaterialManager(self, *args):
+    def getMaterialManager(self, *args) -> "MaterialManager":
         return self._material_manager
 
     @pyqtSlot(result = QObject)
-    def getQualityManager(self, *args):
+    def getQualityManager(self, *args) -> "QualityManager":
         return self._quality_manager
 
     def getObjectsModel(self, *args):
@@ -828,23 +834,23 @@ class CuraApplication(QtApplication):
         return self._object_manager
 
     @pyqtSlot(result = QObject)
-    def getMultiBuildPlateModel(self, *args):
+    def getMultiBuildPlateModel(self, *args) -> MultiBuildPlateModel:
         if self._multi_build_plate_model is None:
             self._multi_build_plate_model = MultiBuildPlateModel(self)
         return self._multi_build_plate_model
 
     @pyqtSlot(result = QObject)
-    def getBuildPlateModel(self, *args):
+    def getBuildPlateModel(self, *args) -> BuildPlateModel:
         if self._build_plate_model is None:
             self._build_plate_model = BuildPlateModel(self)
         return self._build_plate_model
 
-    def getCuraSceneController(self, *args):
+    def getCuraSceneController(self, *args) -> CuraSceneController:
         if self._cura_scene_controller is None:
             self._cura_scene_controller = CuraSceneController.createCuraSceneController()
         return self._cura_scene_controller
 
-    def getSettingInheritanceManager(self, *args):
+    def getSettingInheritanceManager(self, *args) -> SettingInheritanceManager:
         if self._setting_inheritance_manager is None:
             self._setting_inheritance_manager = SettingInheritanceManager.createSettingInheritanceManager()
         return self._setting_inheritance_manager
@@ -915,9 +921,9 @@ class CuraApplication(QtApplication):
         qmlRegisterType(InstanceContainer, "Cura", 1, 0, "InstanceContainer")
         qmlRegisterType(ExtrudersModel, "Cura", 1, 0, "ExtrudersModel")
 
+        qmlRegisterType(FavoriteMaterialsModel, "Cura", 1, 0, "FavoriteMaterialsModel")
         qmlRegisterType(GenericMaterialsModel, "Cura", 1, 0, "GenericMaterialsModel")
-        qmlRegisterType(BrandMaterialsModel, "Cura", 1, 0, "BrandMaterialsModel")
+        qmlRegisterType(MaterialBrandsModel, "Cura", 1, 0, "MaterialBrandsModel")
-        qmlRegisterType(MaterialManagementModel, "Cura", 1, 0, "MaterialManagementModel")
         qmlRegisterType(QualityManagementModel, "Cura", 1, 0, "QualityManagementModel")
         qmlRegisterType(MachineManagementModel, "Cura", 1, 0, "MachineManagementModel")
 
@@ -981,30 +987,14 @@ class CuraApplication(QtApplication):
             self._camera_animation.setTarget(Selection.getSelectedObject(0).getWorldPosition())
             self._camera_animation.start()
 
-    def _onGlobalContainerChanged(self):
-        if self._global_container_stack is not None:
-            machine_file_formats = [file_type.strip() for file_type in self._global_container_stack.getMetaDataEntry("file_formats").split(";")]
-            new_preferred_mimetype = ""
-            if machine_file_formats:
-                new_preferred_mimetype =  machine_file_formats[0]
-
-            if new_preferred_mimetype != self._preferred_mimetype:
-                self._preferred_mimetype = new_preferred_mimetype
-                self.preferredOutputMimetypeChanged.emit()
-
     requestAddPrinter = pyqtSignal()
     activityChanged = pyqtSignal()
     sceneBoundingBoxChanged = pyqtSignal()
-    preferredOutputMimetypeChanged = pyqtSignal()
 
     @pyqtProperty(bool, notify = activityChanged)
     def platformActivity(self):
         return self._platform_activity
 
-    @pyqtProperty(str, notify=preferredOutputMimetypeChanged)
-    def preferredOutputMimetype(self):
-        return self._preferred_mimetype
-
     @pyqtProperty(str, notify = sceneBoundingBoxChanged)
     def getSceneBoundingBoxString(self):
         return self._i18n_catalog.i18nc("@info 'width', 'depth' and 'height' are variable names that must NOT be translated; just translate the format of ##x##x## mm.", "%(width).1f x %(depth).1f x %(height).1f mm") % {'width' : self._scene_bounding_box.width.item(), 'depth': self._scene_bounding_box.depth.item(), 'height' : self._scene_bounding_box.height.item()}
@@ -1720,7 +1710,11 @@ class CuraApplication(QtApplication):
 
     @pyqtSlot()
     def showMoreInformationDialogForAnonymousDataCollection(self):
-        cast(SliceInfo, self._plugin_registry.getPluginObject("SliceInfoPlugin")).showMoreInfoDialog()
+        try:
+            slice_info = self._plugin_registry.getPluginObject("SliceInfoPlugin")
+            slice_info.showMoreInfoDialog()
+        except PluginNotFoundError:
+            Logger.log("w", "Plugin SliceInfo was not found, so not able to show the info dialog.")
 
     def addSidebarCustomMenuItem(self, menu_item: dict) -> None:
         self._sidebar_custom_menu_items.append(menu_item)

cura/LayerPolygon.py

@@ -21,7 +21,7 @@ class LayerPolygon:
     __number_of_types = 11
 
     __jump_map = numpy.logical_or(numpy.logical_or(numpy.arange(__number_of_types) == NoneType, numpy.arange(__number_of_types) == MoveCombingType), numpy.arange(__number_of_types) == MoveRetractionType)
-    
+
     ##  LayerPolygon, used in ProcessSlicedLayersJob
     #   \param extruder
     #   \param line_types array with line_types

cura/Machines/ContainerNode.py

@@ -9,9 +9,6 @@ from UM.ConfigurationErrorMessage import ConfigurationErrorMessage
 from UM.Logger import Logger
 from UM.Settings.InstanceContainer import InstanceContainer
 
-if TYPE_CHECKING:
-    from cura.Machines.QualityGroup import QualityGroup
-
 
 ##
 # A metadata / container combination. Use getContainer() to get the container corresponding to the metadata.
@@ -24,29 +21,34 @@ if TYPE_CHECKING:
 #     This is used in Variant, Material, and Quality Managers.
 #
 class ContainerNode:
-    __slots__ = ("metadata", "container", "children_map")
+    __slots__ = ("_metadata", "_container", "children_map")
 
     def __init__(self, metadata: Optional[Dict[str, Any]] = None) -> None:
-        self.metadata = metadata
+        self._metadata = metadata
-        self.container = None
+        self._container = None # type: Optional[InstanceContainer]
-        self.children_map = OrderedDict() #type: OrderedDict[str, Union[QualityGroup, ContainerNode]]
+        self.children_map = OrderedDict()  # type: ignore  # This is because it's children are supposed to override it.
 
     ##  Get an entry value from the metadata
     def getMetaDataEntry(self, entry: str, default: Any = None) -> Any:
-        if self.metadata is None:
+        if self._metadata is None:
             return default
-        return self.metadata.get(entry, default)
+        return self._metadata.get(entry, default)
+
+    def getMetadata(self) -> Dict[str, Any]:
+        if self._metadata is None:
+            return {}
+        return self._metadata
 
     def getChildNode(self, child_key: str) -> Optional["ContainerNode"]:
         return self.children_map.get(child_key)
 
     def getContainer(self) -> Optional["InstanceContainer"]:
-        if self.metadata is None:
+        if self._metadata is None:
             Logger.log("e", "Cannot get container for a ContainerNode without metadata.")
             return None
 
-        if self.container is None:
+        if self._container is None:
-            container_id = self.metadata["id"]
+            container_id = self._metadata["id"]
             from UM.Settings.ContainerRegistry import ContainerRegistry
             container_list = ContainerRegistry.getInstance().findInstanceContainers(id = container_id)
             if not container_list:
@@ -54,9 +56,9 @@ class ContainerNode:
                 error_message = ConfigurationErrorMessage.getInstance()
                 error_message.addFaultyContainers(container_id)
                 return None
-            self.container = container_list[0]
+            self._container = container_list[0]
 
-        return self.container
+        return self._container
 
     def __str__(self) -> str:
         return "%s[%s]" % (self.__class__.__name__, self.getMetaDataEntry("id"))

cura/Machines/MachineErrorChecker.py

@@ -50,7 +50,7 @@ class MachineErrorChecker(QObject):
         self._error_check_timer.setInterval(100)
         self._error_check_timer.setSingleShot(True)
 
-    def initialize(self):
+    def initialize(self) -> None:
         self._error_check_timer.timeout.connect(self._rescheduleCheck)
 
         # Reconnect all signals when the active machine gets changed.
@@ -62,7 +62,7 @@ class MachineErrorChecker(QObject):
 
         self._onMachineChanged()
 
-    def _onMachineChanged(self):
+    def _onMachineChanged(self) -> None:
         if self._global_stack:
             self._global_stack.propertyChanged.disconnect(self.startErrorCheck)
             self._global_stack.containersChanged.disconnect(self.startErrorCheck)
@@ -94,7 +94,7 @@ class MachineErrorChecker(QObject):
         return self._need_to_check or self._check_in_progress
 
     # Starts the error check timer to schedule a new error check.
-    def startErrorCheck(self, *args):
+    def startErrorCheck(self, *args) -> None:
         if not self._check_in_progress:
             self._need_to_check = True
             self.needToWaitForResultChanged.emit()
@@ -103,7 +103,7 @@ class MachineErrorChecker(QObject):
     # This function is called by the timer to reschedule a new error check.
     # If there is no check in progress, it will start a new one. If there is any, it sets the "_need_to_check" flag
     # to notify the current check to stop and start a new one.
-    def _rescheduleCheck(self):
+    def _rescheduleCheck(self) -> None:
         if self._check_in_progress and not self._need_to_check:
             self._need_to_check = True
             self.needToWaitForResultChanged.emit()
@@ -128,7 +128,7 @@ class MachineErrorChecker(QObject):
         self._start_time = time.time()
         Logger.log("d", "New error check scheduled.")
 
-    def _checkStack(self):
+    def _checkStack(self) -> None:
         if self._need_to_check:
             Logger.log("d", "Need to check for errors again. Discard the current progress and reschedule a check.")
             self._check_in_progress = False
@@ -169,7 +169,7 @@ class MachineErrorChecker(QObject):
         # Schedule the check for the next key
         self._application.callLater(self._checkStack)
 
-    def _setResult(self, result: bool):
+    def _setResult(self, result: bool) -> None:
         if result != self._has_errors:
             self._has_errors = result
             self.hasErrorUpdated.emit()

cura/Machines/MaterialGroup.py

@@ -24,8 +24,8 @@ class MaterialGroup:
     def __init__(self, name: str, root_material_node: "MaterialNode") -> None:
         self.name = name
         self.is_read_only = False
-        self.root_material_node = root_material_node # type: MaterialNode
+        self.root_material_node = root_material_node  # type: MaterialNode
-        self.derived_material_node_list = [] # type: List[MaterialNode]
+        self.derived_material_node_list = []  # type: List[MaterialNode]
 
     def __str__(self) -> str:
         return "%s[%s]" % (self.__class__.__name__, self.name)

cura/Machines/MaterialManager.py

@@ -4,7 +4,7 @@
 from collections import defaultdict, OrderedDict
 import copy
 import uuid
-from typing import Dict, Optional, TYPE_CHECKING
+from typing import Dict, Optional, TYPE_CHECKING, Any, Set, List, cast, Tuple
 
 from PyQt5.Qt import QTimer, QObject, pyqtSignal, pyqtSlot
 
@@ -21,7 +21,6 @@ from .VariantType import VariantType
 
 if TYPE_CHECKING:
     from UM.Settings.DefinitionContainer import DefinitionContainer
-    from UM.Settings.InstanceContainer import InstanceContainer
     from cura.Settings.GlobalStack import GlobalStack
     from cura.Settings.ExtruderStack import ExtruderStack
 
@@ -39,24 +38,34 @@ if TYPE_CHECKING:
 class MaterialManager(QObject):
 
     materialsUpdated = pyqtSignal()  # Emitted whenever the material lookup tables are updated.
+    favoritesUpdated = pyqtSignal()  # Emitted whenever the favorites are changed
 
     def __init__(self, container_registry, parent = None):
         super().__init__(parent)
         self._application = Application.getInstance()
         self._container_registry = container_registry  # type: ContainerRegistry
 
-        self._fallback_materials_map = dict()  # material_type -> generic material metadata
+        # Material_type -> generic material metadata
-        self._material_group_map = dict()  # root_material_id -> MaterialGroup
+        self._fallback_materials_map = dict()  # type: Dict[str, Dict[str, Any]]
-        self._diameter_machine_nozzle_buildplate_material_map = dict()  # approximate diameter str -> dict(machine_definition_id -> MaterialNode)
+
+        # Root_material_id -> MaterialGroup
+        self._material_group_map = dict()  # type: Dict[str, MaterialGroup]
+
+        # Approximate diameter str
+        self._diameter_machine_nozzle_buildplate_material_map = dict()  # type: Dict[str, Dict[str, MaterialNode]]
 
         # We're using these two maps to convert between the specific diameter material id and the generic material id
         # because the generic material ids are used in qualities and definitions, while the specific diameter material is meant
         # i.e. generic_pla -> generic_pla_175
-        self._material_diameter_map = defaultdict(dict)  # root_material_id -> approximate diameter str -> root_material_id for that diameter
+        # root_material_id -> approximate diameter str -> root_material_id for that diameter
-        self._diameter_material_map = dict()  # material id including diameter (generic_pla_175) -> material root id (generic_pla)
+        self._material_diameter_map = defaultdict(dict)  # type: Dict[str, Dict[str, str]]
+
+        # Material id including diameter (generic_pla_175) -> material root id (generic_pla)
+        self._diameter_material_map = dict()  # type: Dict[str, str]
 
         # This is used in Legacy UM3 send material function and the material management page.
-        self._guid_material_groups_map = defaultdict(list)  # GUID -> a list of material_groups
+        # GUID -> a list of material_groups
+        self._guid_material_groups_map = defaultdict(list)  # type: Dict[str, List[MaterialGroup]]
 
         # The machine definition ID for the non-machine-specific materials.
         # This is used as the last fallback option if the given machine-specific material(s) cannot be found.
@@ -75,13 +84,15 @@ class MaterialManager(QObject):
         self._container_registry.containerAdded.connect(self._onContainerMetadataChanged)
         self._container_registry.containerRemoved.connect(self._onContainerMetadataChanged)
 
-    def initialize(self):
+        self._favorites = set()  # type: Set[str]
+
+    def initialize(self) -> None:
         # Find all materials and put them in a matrix for quick search.
         material_metadatas = {metadata["id"]: metadata for metadata in
                               self._container_registry.findContainersMetadata(type = "material") if
-                              metadata.get("GUID")}
+                              metadata.get("GUID")} # type: Dict[str, Dict[str, Any]]
 
-        self._material_group_map = dict()
+        self._material_group_map = dict()  # type: Dict[str, MaterialGroup]
                 
         # Map #1
         #    root_material_id -> MaterialGroup
@@ -90,7 +101,7 @@ class MaterialManager(QObject):
             if material_id == "empty_material":
                 continue
 
-            root_material_id = material_metadata.get("base_file")
+            root_material_id = material_metadata.get("base_file", "")
             if root_material_id not in self._material_group_map:
                 self._material_group_map[root_material_id] = MaterialGroup(root_material_id, MaterialNode(material_metadatas[root_material_id]))
                 self._material_group_map[root_material_id].is_read_only = self._container_registry.isReadOnly(root_material_id)
@@ -106,26 +117,26 @@ class MaterialManager(QObject):
 
         # Map #1.5
         #    GUID -> material group list
-        self._guid_material_groups_map = defaultdict(list)
+        self._guid_material_groups_map = defaultdict(list)  # type: Dict[str, List[MaterialGroup]]
         for root_material_id, material_group in self._material_group_map.items():
-            guid = material_group.root_material_node.metadata["GUID"]
+            guid = material_group.root_material_node.getMetaDataEntry("GUID", "")
             self._guid_material_groups_map[guid].append(material_group)
 
         # Map #2
         # Lookup table for material type -> fallback material metadata, only for read-only materials
-        grouped_by_type_dict = dict()
+        grouped_by_type_dict = dict()  # type: Dict[str, Any]
         material_types_without_fallback = set()
         for root_material_id, material_node in self._material_group_map.items():
-            material_type = material_node.root_material_node.metadata["material"]
+            material_type = material_node.root_material_node.getMetaDataEntry("material", "")
             if material_type not in grouped_by_type_dict:
                 grouped_by_type_dict[material_type] = {"generic": None,
                                                        "others": []}
                 material_types_without_fallback.add(material_type)
-            brand = material_node.root_material_node.metadata["brand"]
+            brand = material_node.root_material_node.getMetaDataEntry("brand", "")
             if brand.lower() == "generic":
                 to_add = True
                 if material_type in grouped_by_type_dict:
-                    diameter = material_node.root_material_node.metadata.get("approximate_diameter")
+                    diameter = material_node.root_material_node.getMetaDataEntry("approximate_diameter", "")
                     if diameter != self._default_approximate_diameter_for_quality_search:
                         to_add = False  # don't add if it's not the default diameter
 
@@ -134,7 +145,7 @@ class MaterialManager(QObject):
                     #  - if it's in the list, it means that is a new material without fallback
                     #  - if it is not, then it is a custom material with a fallback material (parent)
                     if material_type in material_types_without_fallback:
-                        grouped_by_type_dict[material_type] = material_node.root_material_node.metadata
+                        grouped_by_type_dict[material_type] = material_node.root_material_node._metadata
                         material_types_without_fallback.remove(material_type)
 
         # Remove the materials that have no fallback materials
@@ -151,15 +162,15 @@ class MaterialManager(QObject):
         self._diameter_material_map = dict()
 
         # Group the material IDs by the same name, material, brand, and color but with different diameters.
-        material_group_dict = dict()
+        material_group_dict = dict()  # type: Dict[Tuple[Any], Dict[str, str]]
         keys_to_fetch = ("name", "material", "brand", "color")
         for root_material_id, machine_node in self._material_group_map.items():
-            root_material_metadata = machine_node.root_material_node.metadata
+            root_material_metadata = machine_node.root_material_node._metadata
 
-            key_data = []
+            key_data_list = []  # type: List[Any]
             for key in keys_to_fetch:
-                key_data.append(root_material_metadata.get(key))
+                key_data_list.append(machine_node.root_material_node.getMetaDataEntry(key))
-            key_data = tuple(key_data)
+            key_data = cast(Tuple[Any], tuple(key_data_list))  # type: Tuple[Any]
 
             # If the key_data doesn't exist, it doesn't matter if the material is read only...
             if key_data not in material_group_dict:
@@ -168,8 +179,8 @@ class MaterialManager(QObject):
                 # ...but if key_data exists, we just overwrite it if the material is read only, otherwise we skip it
                 if not machine_node.is_read_only:
                     continue
-            approximate_diameter = root_material_metadata.get("approximate_diameter")
+            approximate_diameter = machine_node.root_material_node.getMetaDataEntry("approximate_diameter", "")
-            material_group_dict[key_data][approximate_diameter] = root_material_metadata["id"]
+            material_group_dict[key_data][approximate_diameter] = machine_node.root_material_node.getMetaDataEntry("id", "")
 
         # Map [root_material_id][diameter] -> root_material_id for this diameter
         for data_dict in material_group_dict.values():
@@ -188,13 +199,17 @@ class MaterialManager(QObject):
 
         # Map #4
         # "machine" -> "nozzle name" -> "buildplate name" -> "root material ID" -> specific material InstanceContainer
-        self._diameter_machine_nozzle_buildplate_material_map = dict()
+        self._diameter_machine_nozzle_buildplate_material_map = dict()  # type: Dict[str, Dict[str, MaterialNode]]
         for material_metadata in material_metadatas.values():
             self.__addMaterialMetadataIntoLookupTree(material_metadata)
 
+        favorites = self._application.getPreferences().getValue("cura/favorite_materials")
+        for item in favorites.split(";"):
+            self._favorites.add(item)
+
         self.materialsUpdated.emit()
 
-    def __addMaterialMetadataIntoLookupTree(self, material_metadata: dict) -> None:
+    def __addMaterialMetadataIntoLookupTree(self, material_metadata: Dict[str, Any]) -> None:
         material_id = material_metadata["id"]
 
         # We don't store empty material in the lookup tables
@@ -281,7 +296,7 @@ class MaterialManager(QObject):
         return self._material_diameter_map.get(root_material_id, {}).get(approximate_diameter, root_material_id)
 
     def getRootMaterialIDWithoutDiameter(self, root_material_id: str) -> str:
-        return self._diameter_material_map.get(root_material_id)
+        return self._diameter_material_map.get(root_material_id, "")
 
     def getMaterialGroupListByGUID(self, guid: str) -> Optional[list]:
         return self._guid_material_groups_map.get(guid)
@@ -321,6 +336,7 @@ class MaterialManager(QObject):
         machine_exclude_materials = machine_definition.getMetaDataEntry("exclude_materials", [])
 
         material_id_metadata_dict = dict()  # type: Dict[str, MaterialNode]
+        excluded_materials = set()
         for current_node in nodes_to_check:
             if current_node is None:
                 continue
@@ -329,20 +345,22 @@ class MaterialManager(QObject):
             # Do not exclude other materials that are of the same type.
             for material_id, node in current_node.material_map.items():
                 if material_id in machine_exclude_materials:
-                    Logger.log("d", "Exclude material [%s] for machine [%s]",
+                    excluded_materials.add(material_id)
-                               material_id, machine_definition.getId())
                     continue
 
                 if material_id not in material_id_metadata_dict:
                     material_id_metadata_dict[material_id] = node
 
+        if excluded_materials:
+            Logger.log("d", "Exclude materials {excluded_materials} for machine {machine_definition_id}".format(excluded_materials = ", ".join(excluded_materials), machine_definition_id = machine_definition_id))
+
         return material_id_metadata_dict
 
     #
     # A convenience function to get available materials for the given machine with the extruder position.
     #
     def getAvailableMaterialsForMachineExtruder(self, machine: "GlobalStack",
-                                                extruder_stack: "ExtruderStack") -> Optional[dict]:
+                                                extruder_stack: "ExtruderStack") -> Optional[Dict[str, MaterialNode]]:
         buildplate_name = machine.getBuildplateName()
         nozzle_name = None
         if extruder_stack.variant.getId() != "empty_variant":
@@ -359,7 +377,7 @@ class MaterialManager(QObject):
     #  2. cannot find any material InstanceContainers with the given settings.
     #
     def getMaterialNode(self, machine_definition_id: str, nozzle_name: Optional[str],
-                        buildplate_name: Optional[str], diameter: float, root_material_id: str) -> Optional["InstanceContainer"]:
+                        buildplate_name: Optional[str], diameter: float, root_material_id: str) -> Optional["MaterialNode"]:
         # round the diameter to get the approximate diameter
         rounded_diameter = str(round(diameter))
         if rounded_diameter not in self._diameter_machine_nozzle_buildplate_material_map:
@@ -368,7 +386,7 @@ class MaterialManager(QObject):
             return None
 
         # If there are nozzle materials, get the nozzle-specific material
-        machine_nozzle_buildplate_material_map = self._diameter_machine_nozzle_buildplate_material_map[rounded_diameter]
+        machine_nozzle_buildplate_material_map = self._diameter_machine_nozzle_buildplate_material_map[rounded_diameter]  # type: Dict[str, MaterialNode]
         machine_node = machine_nozzle_buildplate_material_map.get(machine_definition_id)
         nozzle_node = None
         buildplate_node = None
@@ -417,7 +435,7 @@ class MaterialManager(QObject):
             # Look at the guid to material dictionary
             root_material_id = None
             for material_group in self._guid_material_groups_map[material_guid]:
-                root_material_id = material_group.root_material_node.metadata["id"]
+                root_material_id = cast(str, material_group.root_material_node.getMetaDataEntry("id", ""))
                 break
 
             if not root_material_id:
@@ -493,7 +511,7 @@ class MaterialManager(QObject):
     # Sets the new name for the given material.
     #
     @pyqtSlot("QVariant", str)
-    def setMaterialName(self, material_node: "MaterialNode", name: str):
+    def setMaterialName(self, material_node: "MaterialNode", name: str) -> None:
         root_material_id = material_node.getMetaDataEntry("base_file")
         if root_material_id is None:
             return
@@ -511,7 +529,7 @@ class MaterialManager(QObject):
     # Removes the given material.
     #
     @pyqtSlot("QVariant")
-    def removeMaterial(self, material_node: "MaterialNode"):
+    def removeMaterial(self, material_node: "MaterialNode") -> None:
         root_material_id = material_node.getMetaDataEntry("base_file")
         if root_material_id is not None:
             self.removeMaterialByRootId(root_material_id)
@@ -521,8 +539,8 @@ class MaterialManager(QObject):
     # Returns the root material ID of the duplicated material if successful.
     #
     @pyqtSlot("QVariant", result = str)
-    def duplicateMaterial(self, material_node, new_base_id = None, new_metadata = None) -> Optional[str]:
+    def duplicateMaterial(self, material_node: MaterialNode, new_base_id: Optional[str] = None, new_metadata: Dict[str, Any] = None) -> Optional[str]:
-        root_material_id = material_node.metadata["base_file"]
+        root_material_id = cast(str, material_node.getMetaDataEntry("base_file", ""))
 
         material_group = self.getMaterialGroup(root_material_id)
         if not material_group:
@@ -573,11 +591,17 @@ class MaterialManager(QObject):
         for container_to_add in new_containers:
             container_to_add.setDirty(True)
             self._container_registry.addContainer(container_to_add)
+
+
+        # if the duplicated material was favorite then the new material should also be added to favorite.
+        if root_material_id in self.getFavorites():
+            self.addFavorite(new_base_id)
+
         return new_base_id
 
     #
     # Create a new material by cloning Generic PLA for the current material diameter and generate a new GUID.
-    #
+    # Returns the ID of the newly created material.
     @pyqtSlot(result = str)
     def createMaterial(self) -> str:
         from UM.i18n import i18nCatalog
@@ -608,3 +632,25 @@ class MaterialManager(QObject):
                                new_base_id = new_id,
                                new_metadata = new_metadata)
         return new_id
+
+    @pyqtSlot(str)
+    def addFavorite(self, root_material_id: str) -> None:
+        self._favorites.add(root_material_id)
+        self.materialsUpdated.emit()
+
+        # Ensure all settings are saved.
+        self._application.getPreferences().setValue("cura/favorite_materials", ";".join(list(self._favorites)))
+        self._application.saveSettings()
+
+    @pyqtSlot(str)
+    def removeFavorite(self, root_material_id: str) -> None:
+        self._favorites.remove(root_material_id)
+        self.materialsUpdated.emit()
+
+        # Ensure all settings are saved.
+        self._application.getPreferences().setValue("cura/favorite_materials", ";".join(list(self._favorites)))
+        self._application.saveSettings()
+
+    @pyqtSlot()
+    def getFavorites(self):
+        return self._favorites

cura/Machines/MaterialNode.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-from typing import Optional, Dict
+from typing import Optional, Dict, Any
-
+from collections import OrderedDict
 from .ContainerNode import ContainerNode
 
 
@@ -14,6 +14,12 @@ from .ContainerNode import ContainerNode
 class MaterialNode(ContainerNode):
     __slots__ = ("material_map", "children_map")
 
-    def __init__(self, metadata: Optional[dict] = None) -> None:
+    def __init__(self, metadata: Optional[Dict[str, Any]] = None) -> None:
         super().__init__(metadata = metadata)
         self.material_map = {}  # type: Dict[str, MaterialNode] # material_root_id -> material_node
+
+        # We overide this as we want to indicate that MaterialNodes can only contain other material nodes.
+        self.children_map = OrderedDict()  # type: OrderedDict[str, "MaterialNode"]
+
+    def getChildNode(self, child_key: str) -> Optional["MaterialNode"]:
+        return self.children_map.get(child_key)

cura/Machines/Models/BaseMaterialsModel.py

@@ -2,45 +2,60 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from PyQt5.QtCore import Qt, pyqtSignal, pyqtProperty
-
-from UM.Application import Application
 from UM.Qt.ListModel import ListModel
 
 
-#
+## This is the base model class for GenericMaterialsModel and MaterialBrandsModel.
-# This is the base model class for GenericMaterialsModel and BrandMaterialsModel
+#  Those 2 models are used by the material drop down menu to show generic materials and branded materials separately.
-# Those 2 models are used by the material drop down menu to show generic materials and branded materials separately.
+#  The extruder position defined here is being used to bound a menu to the correct extruder. This is used in the top
-# The extruder position defined here is being used to bound a menu to the correct extruder. This is used in the top
+#  bar menu "Settings" -> "Extruder nr" -> "Material" -> this menu
-# bar menu "Settings" -> "Extruder nr" -> "Material" -> this menu
-#
 class BaseMaterialsModel(ListModel):
-    RootMaterialIdRole = Qt.UserRole + 1
-    IdRole = Qt.UserRole + 2
-    NameRole = Qt.UserRole + 3
-    BrandRole = Qt.UserRole + 4
-    MaterialRole = Qt.UserRole + 5
-    ColorRole = Qt.UserRole + 6
-    ContainerNodeRole = Qt.UserRole + 7
 
     extruderPositionChanged = pyqtSignal()
 
     def __init__(self, parent = None):
         super().__init__(parent)
-        self._application = Application.getInstance()
-        self._machine_manager = self._application.getMachineManager()
 
-        self.addRoleName(self.RootMaterialIdRole, "root_material_id")
+        from cura.CuraApplication import CuraApplication
-        self.addRoleName(self.IdRole, "id")
+
-        self.addRoleName(self.NameRole, "name")
+        self._application = CuraApplication.getInstance()
-        self.addRoleName(self.BrandRole, "brand")
+
-        self.addRoleName(self.MaterialRole, "material")
+        # Make these managers available to all material models
-        self.addRoleName(self.ColorRole, "color_name")
+        self._container_registry = self._application.getInstance().getContainerRegistry()
-        self.addRoleName(self.ContainerNodeRole, "container_node")
+        self._machine_manager = self._application.getMachineManager()
+        self._material_manager = self._application.getMaterialManager()
+
+        # Update the stack and the model data when the machine changes
+        self._machine_manager.globalContainerChanged.connect(self._updateExtruderStack)
+
+        # Update this model when switching machines
+        self._machine_manager.activeStackChanged.connect(self._update)
+        
+        # Update this model when list of materials changes
+        self._material_manager.materialsUpdated.connect(self._update)
+
+        self.addRoleName(Qt.UserRole + 1, "root_material_id")
+        self.addRoleName(Qt.UserRole + 2, "id")
+        self.addRoleName(Qt.UserRole + 3, "GUID")
+        self.addRoleName(Qt.UserRole + 4, "name")
+        self.addRoleName(Qt.UserRole + 5, "brand")
+        self.addRoleName(Qt.UserRole + 6, "description")
+        self.addRoleName(Qt.UserRole + 7, "material")
+        self.addRoleName(Qt.UserRole + 8, "color_name")
+        self.addRoleName(Qt.UserRole + 9, "color_code")
+        self.addRoleName(Qt.UserRole + 10, "density")
+        self.addRoleName(Qt.UserRole + 11, "diameter")
+        self.addRoleName(Qt.UserRole + 12, "approximate_diameter")
+        self.addRoleName(Qt.UserRole + 13, "adhesion_info")
+        self.addRoleName(Qt.UserRole + 14, "is_read_only")
+        self.addRoleName(Qt.UserRole + 15, "container_node")
+        self.addRoleName(Qt.UserRole + 16, "is_favorite")
 
         self._extruder_position = 0
         self._extruder_stack = None
-        # Update the stack and the model data when the machine changes
+
-        self._machine_manager.globalContainerChanged.connect(self._updateExtruderStack)
+        self._available_materials = None
+        self._favorite_ids = None
 
     def _updateExtruderStack(self):
         global_stack = self._machine_manager.activeMachine
@@ -65,8 +80,55 @@ class BaseMaterialsModel(ListModel):
     def extruderPosition(self) -> int:
         return self._extruder_position
 
-    #
+    ## This is an abstract method that needs to be implemented by the specific
-    # This is an abstract method that needs to be implemented by
+    #  models themselves.
-    #
     def _update(self):
         pass
+
+    ## This method is used by all material models in the beginning of the
+    #  _update() method in order to prevent errors. It's the same in all models
+    #  so it's placed here for easy access.
+    def _canUpdate(self):
+        global_stack = self._machine_manager.activeMachine
+
+        if global_stack is None:
+            return False
+
+        extruder_position = str(self._extruder_position)
+
+        if extruder_position not in global_stack.extruders:
+            return False
+        
+        extruder_stack = global_stack.extruders[extruder_position]
+
+        self._available_materials = self._material_manager.getAvailableMaterialsForMachineExtruder(global_stack, extruder_stack)
+        if self._available_materials is None:
+            return False
+
+        return True
+
+    ## This is another convenience function which is shared by all material
+    #  models so it's put here to avoid having so much duplicated code.
+    def _createMaterialItem(self, root_material_id, container_node):
+        metadata = container_node.getMetadata()
+        item = {
+            "root_material_id":     root_material_id,
+            "id":                   metadata["id"],
+            "container_id":         metadata["id"], # TODO: Remove duplicate in material manager qml
+            "GUID":                 metadata["GUID"],
+            "name":                 metadata["name"],
+            "brand":                metadata["brand"],
+            "description":          metadata["description"],
+            "material":             metadata["material"],
+            "color_name":           metadata["color_name"],
+            "color_code":           metadata.get("color_code", ""),
+            "density":              metadata.get("properties", {}).get("density", ""),
+            "diameter":             metadata.get("properties", {}).get("diameter", ""),
+            "approximate_diameter": metadata["approximate_diameter"],
+            "adhesion_info":        metadata["adhesion_info"],
+            "is_read_only":         self._container_registry.isReadOnly(metadata["id"]),
+            "container_node":       container_node,
+            "is_favorite":          root_material_id in self._favorite_ids
+        }
+        return item
+

cura/Machines/Models/BrandMaterialsModel.py

@@ -1,157 +0,0 @@
-# Copyright (c) 2018 Ultimaker B.V.
-# Cura is released under the terms of the LGPLv3 or higher.
-
-from PyQt5.QtCore import Qt, pyqtSignal, pyqtProperty
-
-from UM.Qt.ListModel import ListModel
-from UM.Logger import Logger
-from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
-
-
-#
-# This is an intermediate model to group materials with different colours for a same brand and type.
-#
-class MaterialsModelGroupedByType(ListModel):
-    NameRole = Qt.UserRole + 1
-    ColorsRole = Qt.UserRole + 2
-
-    def __init__(self, parent = None):
-        super().__init__(parent)
-
-        self.addRoleName(self.NameRole, "name")
-        self.addRoleName(self.ColorsRole, "colors")
-
-
-#
-# This model is used to show branded materials in the material drop down menu.
-# The structure of the menu looks like this:
-#       Brand -> Material Type -> list of materials
-#
-# To illustrate, a branded material menu may look like this:
-#      Ultimaker -> PLA -> Yellow PLA
-#                       -> Black PLA
-#                       -> ...
-#                -> ABS -> White ABS
-#                          ...
-#
-class BrandMaterialsModel(ListModel):
-    NameRole = Qt.UserRole + 1
-    MaterialsRole = Qt.UserRole + 2
-
-    extruderPositionChanged = pyqtSignal()
-
-    def __init__(self, parent = None):
-        super().__init__(parent)
-
-        self.addRoleName(self.NameRole, "name")
-        self.addRoleName(self.MaterialsRole, "materials")
-
-        self._extruder_position = 0
-        self._extruder_stack = None
-
-        from cura.CuraApplication import CuraApplication
-        self._machine_manager = CuraApplication.getInstance().getMachineManager()
-        self._extruder_manager = CuraApplication.getInstance().getExtruderManager()
-        self._material_manager = CuraApplication.getInstance().getMaterialManager()
-
-        self._machine_manager.globalContainerChanged.connect(self._updateExtruderStack)
-        self._machine_manager.activeStackChanged.connect(self._update) #Update when switching machines.
-        self._material_manager.materialsUpdated.connect(self._update) #Update when the list of materials changes.
-        self._update()
-
-    def _updateExtruderStack(self):
-        global_stack = self._machine_manager.activeMachine
-        if global_stack is None:
-            return
-
-        if self._extruder_stack is not None:
-            self._extruder_stack.pyqtContainersChanged.disconnect(self._update)
-        self._extruder_stack = global_stack.extruders.get(str(self._extruder_position))
-        if self._extruder_stack is not None:
-            self._extruder_stack.pyqtContainersChanged.connect(self._update)
-        # Force update the model when the extruder stack changes
-        self._update()
-
-    def setExtruderPosition(self, position: int):
-        if self._extruder_stack is None or self._extruder_position != position:
-            self._extruder_position = position
-            self._updateExtruderStack()
-            self.extruderPositionChanged.emit()
-
-    @pyqtProperty(int, fset=setExtruderPosition, notify=extruderPositionChanged)
-    def extruderPosition(self) -> int:
-        return self._extruder_position
-
-    def _update(self):
-        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
-        global_stack = self._machine_manager.activeMachine
-        if global_stack is None:
-            self.setItems([])
-            return
-        extruder_position = str(self._extruder_position)
-        if extruder_position not in global_stack.extruders:
-            self.setItems([])
-            return
-        extruder_stack = global_stack.extruders[str(self._extruder_position)]
-
-        available_material_dict = self._material_manager.getAvailableMaterialsForMachineExtruder(global_stack,
-                                                                                                 extruder_stack)
-        if available_material_dict is None:
-            self.setItems([])
-            return
-
-        brand_item_list = []
-        brand_group_dict = {}
-        for root_material_id, container_node in available_material_dict.items():
-            metadata = container_node.metadata
-            brand = metadata["brand"]
-            # Only add results for generic materials
-            if brand.lower() == "generic":
-                continue
-
-            # Do not include the materials from a to-be-removed package
-            if bool(metadata.get("removed", False)):
-                continue
-
-            if brand not in brand_group_dict:
-                brand_group_dict[brand] = {}
-
-            material_type = metadata["material"]
-            if material_type not in brand_group_dict[brand]:
-                brand_group_dict[brand][material_type] = []
-
-            item = {"root_material_id": root_material_id,
-                    "id": metadata["id"],
-                    "name": metadata["name"],
-                    "brand": metadata["brand"],
-                    "material": metadata["material"],
-                    "color_name": metadata["color_name"],
-                    "container_node": container_node
-                    }
-            brand_group_dict[brand][material_type].append(item)
-
-        for brand, material_dict in brand_group_dict.items():
-            brand_item = {"name": brand,
-                          "materials": MaterialsModelGroupedByType(self)}
-
-            material_type_item_list = []
-            for material_type, material_list in material_dict.items():
-                material_type_item = {"name": material_type,
-                                      "colors": BaseMaterialsModel(self)}
-                material_type_item["colors"].clear()
-
-                # Sort materials by name
-                material_list = sorted(material_list, key = lambda x: x["name"].upper())
-                material_type_item["colors"].setItems(material_list)
-
-                material_type_item_list.append(material_type_item)
-
-            # Sort material type by name
-            material_type_item_list = sorted(material_type_item_list, key = lambda x: x["name"].upper())
-            brand_item["materials"].setItems(material_type_item_list)
-
-            brand_item_list.append(brand_item)
-
-        # Sort brand by name
-        brand_item_list = sorted(brand_item_list, key = lambda x: x["name"].upper())
-        self.setItems(brand_item_list)

cura/Machines/Models/FavoriteMaterialsModel.py

@@ -0,0 +1,42 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM.Logger import Logger
+from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
+
+class FavoriteMaterialsModel(BaseMaterialsModel):
+
+    def __init__(self, parent = None):
+        super().__init__(parent)
+        self._update()
+
+    def _update(self):
+
+        # Perform standard check and reset if the check fails
+        if not self._canUpdate():
+            self.setItems([])
+            return
+
+        # Get updated list of favorites
+        self._favorite_ids = self._material_manager.getFavorites()
+
+        item_list = []
+
+        for root_material_id, container_node in self._available_materials.items():
+            metadata = container_node.getMetadata()
+
+            # Do not include the materials from a to-be-removed package
+            if bool(metadata.get("removed", False)):
+                continue
+
+            # Only add results for favorite materials
+            if root_material_id not in self._favorite_ids:
+                continue
+
+            item = self._createMaterialItem(root_material_id, container_node)
+            item_list.append(item)
+
+        # Sort the item list alphabetically by name
+        item_list = sorted(item_list, key = lambda d: d["brand"].upper())
+
+        self.setItems(item_list)

cura/Machines/Models/GenericMaterialsModel.py

@@ -4,63 +4,39 @@
 from UM.Logger import Logger
 from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
 
-
 class GenericMaterialsModel(BaseMaterialsModel):
 
     def __init__(self, parent = None):
         super().__init__(parent)
-
-        from cura.CuraApplication import CuraApplication
-        self._machine_manager = CuraApplication.getInstance().getMachineManager()
-        self._extruder_manager = CuraApplication.getInstance().getExtruderManager()
-        self._material_manager = CuraApplication.getInstance().getMaterialManager()
-
-        self._machine_manager.activeStackChanged.connect(self._update) #Update when switching machines.
-        self._material_manager.materialsUpdated.connect(self._update) #Update when the list of materials changes.
         self._update()
 
     def _update(self):
-        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
 
-        global_stack = self._machine_manager.activeMachine
+        # Perform standard check and reset if the check fails
-        if global_stack is None:
+        if not self._canUpdate():
             self.setItems([])
             return
-        extruder_position = str(self._extruder_position)
-        if extruder_position not in global_stack.extruders:
-            self.setItems([])
-            return
-        extruder_stack = global_stack.extruders[extruder_position]
 
-        available_material_dict = self._material_manager.getAvailableMaterialsForMachineExtruder(global_stack,
+        # Get updated list of favorites
-                                                                                                 extruder_stack)
+        self._favorite_ids = self._material_manager.getFavorites()
-        if available_material_dict is None:
-            self.setItems([])
-            return
 
         item_list = []
-        for root_material_id, container_node in available_material_dict.items():
-            metadata = container_node.metadata
 
-            # Only add results for generic materials
+        for root_material_id, container_node in self._available_materials.items():
-            if metadata["brand"].lower() != "generic":
+            metadata = container_node.getMetadata()
-                continue
 
             # Do not include the materials from a to-be-removed package
             if bool(metadata.get("removed", False)):
                 continue
 
-            item = {"root_material_id": root_material_id,
+            # Only add results for generic materials
-                    "id": metadata["id"],
+            if metadata["brand"].lower() != "generic":
-                    "name": metadata["name"],
+                continue
-                    "brand": metadata["brand"],
+
-                    "material": metadata["material"],
+            item = self._createMaterialItem(root_material_id, container_node)
-                    "color_name": metadata["color_name"],
-                    "container_node": container_node
-                    }
             item_list.append(item)
 
-        # Sort the item list by material name alphabetically
+        # Sort the item list alphabetically by name
         item_list = sorted(item_list, key = lambda d: d["name"].upper())
 
         self.setItems(item_list)

cura/Machines/Models/MaterialBrandsModel.py

@@ -0,0 +1,107 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtCore import Qt, pyqtSignal, pyqtProperty
+from UM.Qt.ListModel import ListModel
+from UM.Logger import Logger
+from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
+
+class MaterialTypesModel(ListModel):
+
+    def __init__(self, parent = None):
+        super().__init__(parent)
+
+        self.addRoleName(Qt.UserRole + 1, "name")
+        self.addRoleName(Qt.UserRole + 2, "brand")
+        self.addRoleName(Qt.UserRole + 3, "colors")
+
+class MaterialBrandsModel(BaseMaterialsModel):
+
+    extruderPositionChanged = pyqtSignal()
+
+    def __init__(self, parent = None):
+        super().__init__(parent)
+
+        self.addRoleName(Qt.UserRole + 1, "name")
+        self.addRoleName(Qt.UserRole + 2, "material_types")
+
+        self._update()
+
+    def _update(self):
+
+        # Perform standard check and reset if the check fails
+        if not self._canUpdate():
+            self.setItems([])
+            return
+
+        # Get updated list of favorites
+        self._favorite_ids = self._material_manager.getFavorites()
+
+        brand_item_list = []
+        brand_group_dict = {}
+
+        # Part 1: Generate the entire tree of brands -> material types -> spcific materials
+        for root_material_id, container_node in self._available_materials.items():
+            # Do not include the materials from a to-be-removed package
+            if bool(container_node.getMetaDataEntry("removed", False)):
+                continue
+
+            # Add brands we haven't seen yet to the dict, skipping generics
+            brand = container_node.getMetaDataEntry("brand", "")
+            if brand.lower() == "generic":
+                continue
+            if brand not in brand_group_dict:
+                brand_group_dict[brand] = {}
+
+            # Add material types we haven't seen yet to the dict
+            material_type = container_node.getMetaDataEntry("material", "")
+            if material_type not in brand_group_dict[brand]:
+                brand_group_dict[brand][material_type] = []
+
+            # Now handle the individual materials
+            item = self._createMaterialItem(root_material_id, container_node)
+            brand_group_dict[brand][material_type].append(item)
+
+        # Part 2: Organize the tree into models
+        #
+        # Normally, the structure of the menu looks like this:
+        #     Brand -> Material Type -> Specific Material
+        #
+        # To illustrate, a branded material menu may look like this:
+        #     Ultimaker ┳ PLA ┳ Yellow PLA
+        #               ┃     ┣ Black PLA
+        #               ┃     ┗ ...
+        #               ┃
+        #               ┗ ABS ┳ White ABS
+        #                     ┗ ...
+        for brand, material_dict in brand_group_dict.items():
+
+            material_type_item_list = []
+            brand_item = {
+                "name": brand,
+                "material_types": MaterialTypesModel(self)
+            }
+
+            for material_type, material_list in material_dict.items():
+                material_type_item = {
+                    "name": material_type,
+                    "brand": brand,
+                    "colors": BaseMaterialsModel(self)
+                }
+                material_type_item["colors"].clear()
+
+                # Sort materials by name
+                material_list = sorted(material_list, key = lambda x: x["name"].upper())
+                material_type_item["colors"].setItems(material_list)
+
+                material_type_item_list.append(material_type_item)
+
+            # Sort material type by name
+            material_type_item_list = sorted(material_type_item_list, key = lambda x: x["name"].upper())
+            brand_item["material_types"].setItems(material_type_item_list)
+
+            brand_item_list.append(brand_item)
+
+        # Sort brand by name
+        brand_item_list = sorted(brand_item_list, key = lambda x: x["name"].upper())
+        self.setItems(brand_item_list)

cura/Machines/Models/MaterialManagementModel.py

@@ -1,104 +0,0 @@
-# Copyright (c) 2018 Ultimaker B.V.
-# Cura is released under the terms of the LGPLv3 or higher.
-
-from PyQt5.QtCore import Qt
-
-from UM.Logger import Logger
-from UM.Qt.ListModel import ListModel
-
-
-#
-# This model is for the Material management page.
-#
-class MaterialManagementModel(ListModel):
-    RootMaterialIdRole = Qt.UserRole + 1
-    DisplayNameRole = Qt.UserRole + 2
-    BrandRole = Qt.UserRole + 3
-    MaterialTypeRole = Qt.UserRole + 4
-    ColorNameRole = Qt.UserRole + 5
-    ColorCodeRole = Qt.UserRole + 6
-    ContainerNodeRole = Qt.UserRole + 7
-    ContainerIdRole = Qt.UserRole + 8
-
-    DescriptionRole = Qt.UserRole + 9
-    AdhesionInfoRole = Qt.UserRole + 10
-    ApproximateDiameterRole = Qt.UserRole + 11
-    GuidRole = Qt.UserRole + 12
-    DensityRole = Qt.UserRole + 13
-    DiameterRole = Qt.UserRole + 14
-    IsReadOnlyRole = Qt.UserRole + 15
-
-    def __init__(self, parent = None):
-        super().__init__(parent)
-
-        self.addRoleName(self.RootMaterialIdRole, "root_material_id")
-        self.addRoleName(self.DisplayNameRole, "name")
-        self.addRoleName(self.BrandRole, "brand")
-        self.addRoleName(self.MaterialTypeRole, "material")
-        self.addRoleName(self.ColorNameRole, "color_name")
-        self.addRoleName(self.ColorCodeRole, "color_code")
-        self.addRoleName(self.ContainerNodeRole, "container_node")
-        self.addRoleName(self.ContainerIdRole, "container_id")
-
-        self.addRoleName(self.DescriptionRole, "description")
-        self.addRoleName(self.AdhesionInfoRole, "adhesion_info")
-        self.addRoleName(self.ApproximateDiameterRole, "approximate_diameter")
-        self.addRoleName(self.GuidRole, "guid")
-        self.addRoleName(self.DensityRole, "density")
-        self.addRoleName(self.DiameterRole, "diameter")
-        self.addRoleName(self.IsReadOnlyRole, "is_read_only")
-
-        from cura.CuraApplication import CuraApplication
-        self._container_registry = CuraApplication.getInstance().getContainerRegistry()
-        self._machine_manager = CuraApplication.getInstance().getMachineManager()
-        self._extruder_manager = CuraApplication.getInstance().getExtruderManager()
-        self._material_manager = CuraApplication.getInstance().getMaterialManager()
-
-        self._machine_manager.globalContainerChanged.connect(self._update)
-        self._extruder_manager.activeExtruderChanged.connect(self._update)
-        self._material_manager.materialsUpdated.connect(self._update)
-
-        self._update()
-
-    def _update(self):
-        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
-
-        global_stack = self._machine_manager.activeMachine
-        if global_stack is None:
-            self.setItems([])
-            return
-        active_extruder_stack = self._machine_manager.activeStack
-
-        available_material_dict = self._material_manager.getAvailableMaterialsForMachineExtruder(global_stack,
-                                                                                                 active_extruder_stack)
-        if available_material_dict is None:
-            self.setItems([])
-            return
-
-        material_list = []
-        for root_material_id, container_node in available_material_dict.items():
-            keys_to_fetch = ("name",
-                             "brand",
-                             "material",
-                             "color_name",
-                             "color_code",
-                             "description",
-                             "adhesion_info",
-                             "approximate_diameter",)
-
-            item = {"root_material_id": container_node.metadata["base_file"],
-                    "container_node": container_node,
-                    "guid": container_node.metadata["GUID"],
-                    "container_id": container_node.metadata["id"],
-                    "density": container_node.metadata.get("properties", {}).get("density", ""),
-                    "diameter": container_node.metadata.get("properties", {}).get("diameter", ""),
-                    "is_read_only": self._container_registry.isReadOnly(container_node.metadata["id"]),
-                    }
-
-            for key in keys_to_fetch:
-                item[key] = container_node.metadata.get(key, "")
-
-            material_list.append(item)
-
-        material_list = sorted(material_list, key = lambda k: (k["brand"].upper(), k["name"].upper()))
-        self.setItems(material_list)

cura/Machines/Models/QualityProfilesDropDownMenuModel.py

@@ -6,10 +6,10 @@ from PyQt5.QtCore import Qt
 from UM.Application import Application
 from UM.Logger import Logger
 from UM.Qt.ListModel import ListModel
+from UM.Settings.SettingFunction import SettingFunction
 
 from cura.Machines.QualityManager import QualityGroup
 
-
 #
 # QML Model for all built-in quality profiles. This model is used for the drop-down quality menu.
 #
@@ -106,4 +106,8 @@ class QualityProfilesDropDownMenuModel(ListModel):
             container = global_stack.definition
             if container and container.hasProperty("layer_height", "value"):
                 layer_height = container.getProperty("layer_height", "value")
+
+        if isinstance(layer_height, SettingFunction):
+            layer_height = layer_height(global_stack)
+
         return float(layer_height)

cura/Machines/Models/SettingVisibilityPresetsModel.py

@@ -58,7 +58,7 @@ class SettingVisibilityPresetsModel(ListModel):
                 break
         return result
 
-    def _populate(self):
+    def _populate(self) -> None:
         from cura.CuraApplication import CuraApplication
         items = []
         for file_path in Resources.getAllResourcesOfType(CuraApplication.ResourceTypes.SettingVisibilityPreset):
@@ -147,7 +147,7 @@ class SettingVisibilityPresetsModel(ListModel):
     def activePreset(self) -> str:
         return self._active_preset_item["id"]
 
-    def _onPreferencesChanged(self, name: str):
+    def _onPreferencesChanged(self, name: str) -> None:
         if name != "general/visible_settings":
             return
 

cura/Machines/QualityChangesGroup.py

@@ -17,16 +17,16 @@ class QualityChangesGroup(QualityGroup):
         super().__init__(name, quality_type, parent)
         self._container_registry = Application.getInstance().getContainerRegistry()
 
-    def addNode(self, node: "QualityNode"):
+    def addNode(self, node: "QualityNode") -> None:
         extruder_position = node.getMetaDataEntry("position")
 
         if extruder_position is None and self.node_for_global is not None or extruder_position in self.nodes_for_extruders: #We would be overwriting another node.
             ConfigurationErrorMessage.getInstance().addFaultyContainers(node.getMetaDataEntry("id"))
             return
 
-        if extruder_position is None: #Then we're a global quality changes profile.
+        if extruder_position is None:  # Then we're a global quality changes profile.
             self.node_for_global = node
-        else: #This is an extruder's quality changes profile.
+        else:  # This is an extruder's quality changes profile.
             self.nodes_for_extruders[extruder_position] = node
 
     def __str__(self) -> str:

cura/Machines/QualityGroup.py

@@ -6,6 +6,7 @@ from typing import Dict, Optional, List, Set
 from PyQt5.QtCore import QObject, pyqtSlot
 from cura.Machines.ContainerNode import ContainerNode
 
+
 #
 # A QualityGroup represents a group of containers that must be applied to each ContainerStack when it's used.
 # Some concrete examples are Quality and QualityChanges: when we select quality type "normal", this quality type
@@ -34,7 +35,7 @@ class QualityGroup(QObject):
         return self.name
 
     def getAllKeys(self) -> Set[str]:
-        result = set() #type: Set[str]
+        result = set()  # type: Set[str]
         for node in [self.node_for_global] + list(self.nodes_for_extruders.values()):
             if node is None:
                 continue

cura/Machines/QualityManager.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-from typing import TYPE_CHECKING, Optional, cast
+from typing import TYPE_CHECKING, Optional, cast, Dict, List
 
 from PyQt5.QtCore import QObject, QTimer, pyqtSignal, pyqtSlot
 
@@ -20,6 +20,8 @@ if TYPE_CHECKING:
     from UM.Settings.DefinitionContainer import DefinitionContainer
     from cura.Settings.GlobalStack import GlobalStack
     from .QualityChangesGroup import QualityChangesGroup
+    from cura.CuraApplication import CuraApplication
+    from UM.Settings.ContainerRegistry import ContainerRegistry
 
 
 #
@@ -36,17 +38,20 @@ class QualityManager(QObject):
 
     qualitiesUpdated = pyqtSignal()
 
-    def __init__(self, container_registry, parent = None):
+    def __init__(self, container_registry: "ContainerRegistry", parent = None) -> None:
         super().__init__(parent)
-        self._application = Application.getInstance()
+        self._application = Application.getInstance()  # type: CuraApplication
         self._material_manager = self._application.getMaterialManager()
         self._container_registry = container_registry
 
         self._empty_quality_container = self._application.empty_quality_container
         self._empty_quality_changes_container = self._application.empty_quality_changes_container
 
-        self._machine_nozzle_buildplate_material_quality_type_to_quality_dict = {}  # for quality lookup
+        # For quality lookup
-        self._machine_quality_type_to_quality_changes_dict = {}  # for quality_changes lookup
+        self._machine_nozzle_buildplate_material_quality_type_to_quality_dict = {}  # type: Dict[str, QualityNode]
+
+        # For quality_changes lookup
+        self._machine_quality_type_to_quality_changes_dict = {}  # type: Dict[str, QualityNode]
 
         self._default_machine_definition_id = "fdmprinter"
 
@@ -62,7 +67,7 @@ class QualityManager(QObject):
         self._update_timer.setSingleShot(True)
         self._update_timer.timeout.connect(self._updateMaps)
 
-    def initialize(self):
+    def initialize(self) -> None:
         # Initialize the lookup tree for quality profiles with following structure:
         # <machine> -> <nozzle> -> <buildplate> -> <material>
         # <machine> -> <material>
@@ -133,13 +138,13 @@ class QualityManager(QObject):
         Logger.log("d", "Lookup tables updated.")
         self.qualitiesUpdated.emit()
 
-    def _updateMaps(self):
+    def _updateMaps(self) -> None:
         self.initialize()
 
-    def _onContainerMetadataChanged(self, container):
+    def _onContainerMetadataChanged(self, container: InstanceContainer) -> None:
         self._onContainerChanged(container)
 
-    def _onContainerChanged(self, container):
+    def _onContainerChanged(self, container: InstanceContainer) -> None:
         container_type = container.getMetaDataEntry("type")
         if container_type not in ("quality", "quality_changes"):
             return
@@ -148,7 +153,7 @@ class QualityManager(QObject):
         self._update_timer.start()
 
     # Updates the given quality groups' availabilities according to which extruders are being used/ enabled.
-    def _updateQualityGroupsAvailability(self, machine: "GlobalStack", quality_group_list):
+    def _updateQualityGroupsAvailability(self, machine: "GlobalStack", quality_group_list) -> None:
         used_extruders = set()
         for i in range(machine.getProperty("machine_extruder_count", "value")):
             if str(i) in machine.extruders and machine.extruders[str(i)].isEnabled:
@@ -196,32 +201,42 @@ class QualityManager(QObject):
     # Whether a QualityGroup is available can be unknown via the field QualityGroup.is_available.
     # For more details, see QualityGroup.
     #
-    def getQualityGroups(self, machine: "GlobalStack") -> dict:
+    def getQualityGroups(self, machine: "GlobalStack") -> Dict[str, QualityGroup]:
         machine_definition_id = getMachineDefinitionIDForQualitySearch(machine.definition)
 
         # This determines if we should only get the global qualities for the global stack and skip the global qualities for the extruder stacks
-        has_variant_materials = parseBool(machine.getMetaDataEntry("has_variant_materials", False))
+        has_machine_specific_qualities = machine.getHasMachineQuality()
 
         # To find the quality container for the GlobalStack, check in the following fall-back manner:
         #   (1) the machine-specific node
         #   (2) the generic node
         machine_node = self._machine_nozzle_buildplate_material_quality_type_to_quality_dict.get(machine_definition_id)
+        # Check if this machine has specific quality profiles for its extruders, if so, when looking up extruder
+        # qualities, we should not fall back to use the global qualities.
+        has_extruder_specific_qualities = False
+        if machine_node:
+            if machine_node.children_map:
+                has_extruder_specific_qualities = True
+
         default_machine_node = self._machine_nozzle_buildplate_material_quality_type_to_quality_dict.get(self._default_machine_definition_id)
-        nodes_to_check = [machine_node, default_machine_node]
+
+        nodes_to_check = []  # type: List[QualityNode]
+        if machine_node is not None:
+            nodes_to_check.append(machine_node)
+        if default_machine_node is not None:
+            nodes_to_check.append(default_machine_node)
 
         # Iterate over all quality_types in the machine node
         quality_group_dict = {}
         for node in nodes_to_check:
             if node and node.quality_type_map:
-                # Only include global qualities
+                quality_node = list(node.quality_type_map.values())[0]
-                if has_variant_materials:
+                is_global_quality = parseBool(quality_node.getMetaDataEntry("global_quality", False))
-                    quality_node = list(node.quality_type_map.values())[0]
+                if not is_global_quality:
-                    is_global_quality = parseBool(quality_node.metadata.get("global_quality", False))
+                    continue
-                    if not is_global_quality:
-                        continue
 
                 for quality_type, quality_node in node.quality_type_map.items():
-                    quality_group = QualityGroup(quality_node.metadata["name"], quality_type)
+                    quality_group = QualityGroup(quality_node.getMetaDataEntry("name", ""), quality_type)
                     quality_group.node_for_global = quality_node
                     quality_group_dict[quality_type] = quality_group
                 break
@@ -259,18 +274,25 @@ class QualityManager(QObject):
             #   2. machine-nozzle-and-material-specific qualities if exist
             #   3. machine-nozzle-specific qualities if exist
             #   4. machine-material-specific qualities if exist
-            #   5. machine-specific qualities if exist
+            #   5. machine-specific global qualities if exist, otherwise generic global qualities
-            #   6. generic qualities if exist
+            #      NOTE: We DO NOT fail back to generic global qualities if machine-specific global qualities exist.
+            #            This is because when a machine defines its own global qualities such as Normal, Fine, etc.,
+            #            it is intended to maintain those specific qualities ONLY. If we still fail back to the generic
+            #            global qualities, there can be unimplemented quality types e.g. "coarse", and this is not
+            #            correct.
             # Each points above can be represented as a node in the lookup tree, so here we simply put those nodes into
             # the list with priorities as the order. Later, we just need to loop over each node in this list and fetch
             # qualities from there.
-            node_info_list_0 = [nozzle_name, buildplate_name, root_material_id]
+            node_info_list_0 = [nozzle_name, buildplate_name, root_material_id]  # type: List[Optional[str]]
             nodes_to_check = []
 
             # This function tries to recursively find the deepest (the most specific) branch and add those nodes to
             # the search list in the order described above. So, by iterating over that search node list, we first look
             # in the more specific branches and then the less specific (generic) ones.
-            def addNodesToCheck(node, nodes_to_check_list, node_info_list, node_info_idx):
+            def addNodesToCheck(node: Optional[QualityNode], nodes_to_check_list: List[QualityNode], node_info_list, node_info_idx: int) -> None:
+                if node is None:
+                    return
+
                 if node_info_idx < len(node_info_list):
                     node_name = node_info_list[node_info_idx]
                     if node_name is not None:
@@ -289,31 +311,44 @@ class QualityManager(QObject):
 
             addNodesToCheck(machine_node, nodes_to_check, node_info_list_0, 0)
 
-            nodes_to_check += [machine_node, default_machine_node]
+            # The last fall back will be the global qualities (either from the machine-specific node or the generic
-            for node in nodes_to_check:
+            # node), but we only use one. For details see the overview comments above.
+
+            if machine_node is not None and machine_node.quality_type_map:
+                nodes_to_check += [machine_node]
+            elif default_machine_node is not None:
+                nodes_to_check += [default_machine_node]
+
+            for node_idx, node in enumerate(nodes_to_check):
                 if node and node.quality_type_map:
-                    if has_variant_materials:
+                    if has_extruder_specific_qualities:
                         # Only include variant qualities; skip non global qualities
                         quality_node = list(node.quality_type_map.values())[0]
-                        is_global_quality = parseBool(quality_node.metadata.get("global_quality", False))
+                        is_global_quality = parseBool(quality_node.getMetaDataEntry("global_quality", False))
                         if is_global_quality:
                             continue
 
                     for quality_type, quality_node in node.quality_type_map.items():
                         if quality_type not in quality_group_dict:
-                            quality_group = QualityGroup(quality_node.metadata["name"], quality_type)
+                            quality_group = QualityGroup(quality_node.getMetaDataEntry("name", ""), quality_type)
                             quality_group_dict[quality_type] = quality_group
 
                         quality_group = quality_group_dict[quality_type]
                         if position not in quality_group.nodes_for_extruders:
                             quality_group.nodes_for_extruders[position] = quality_node
 
+                # If the machine has its own specific qualities, for extruders, it should skip the global qualities
+                # and use the material/variant specific qualities.
+                if has_extruder_specific_qualities:
+                    if node_idx == len(nodes_to_check) - 1:
+                        break
+
         # Update availabilities for each quality group
         self._updateQualityGroupsAvailability(machine, quality_group_dict.values())
 
         return quality_group_dict
 
-    def getQualityGroupsForMachineDefinition(self, machine: "GlobalStack") -> dict:
+    def getQualityGroupsForMachineDefinition(self, machine: "GlobalStack") -> Dict[str, QualityGroup]:
         machine_definition_id = getMachineDefinitionIDForQualitySearch(machine.definition)
 
         # To find the quality container for the GlobalStack, check in the following fall-back manner:
@@ -329,7 +364,7 @@ class QualityManager(QObject):
         for node in nodes_to_check:
             if node and node.quality_type_map:
                 for quality_type, quality_node in node.quality_type_map.items():
-                    quality_group = QualityGroup(quality_node.metadata["name"], quality_type)
+                    quality_group = QualityGroup(quality_node.getMetaDataEntry("name", ""), quality_type)
                     quality_group.node_for_global = quality_node
                     quality_group_dict[quality_type] = quality_group
                 break
@@ -351,10 +386,21 @@ class QualityManager(QObject):
     # Remove the given quality changes group.
     #
     @pyqtSlot(QObject)
-    def removeQualityChangesGroup(self, quality_changes_group: "QualityChangesGroup"):
+    def removeQualityChangesGroup(self, quality_changes_group: "QualityChangesGroup") -> None:
         Logger.log("i", "Removing quality changes group [%s]", quality_changes_group.name)
+        removed_quality_changes_ids = set()
         for node in quality_changes_group.getAllNodes():
-            self._container_registry.removeContainer(node.getMetaDataEntry("id"))
+            container_id = node.getMetaDataEntry("id")
+            self._container_registry.removeContainer(container_id)
+            removed_quality_changes_ids.add(container_id)
+
+        # Reset all machines that have activated this quality changes to empty.
+        for global_stack in self._container_registry.findContainerStacks(type = "machine"):
+            if global_stack.qualityChanges.getId() in removed_quality_changes_ids:
+                global_stack.qualityChanges = self._empty_quality_changes_container
+        for extruder_stack in self._container_registry.findContainerStacks(type = "extruder_train"):
+            if extruder_stack.qualityChanges.getId() in removed_quality_changes_ids:
+                extruder_stack.qualityChanges = self._empty_quality_changes_container
 
     #
     # Rename a set of quality changes containers. Returns the new name.
@@ -383,7 +429,7 @@ class QualityManager(QObject):
     # Duplicates the given quality.
     #
     @pyqtSlot(str, "QVariantMap")
-    def duplicateQualityChanges(self, quality_changes_name, quality_model_item):
+    def duplicateQualityChanges(self, quality_changes_name: str, quality_model_item) -> None:
         global_stack = self._application.getGlobalContainerStack()
         if not global_stack:
             Logger.log("i", "No active global stack, cannot duplicate quality changes.")
@@ -411,7 +457,7 @@ class QualityManager(QObject):
     #   the user containers in each stack. These then replace the quality_changes containers in the
     #   stack and clear the user settings.
     @pyqtSlot(str)
-    def createQualityChanges(self, base_name):
+    def createQualityChanges(self, base_name: str) -> None:
         machine_manager = Application.getInstance().getMachineManager()
 
         global_stack = machine_manager.activeMachine

cura/Machines/QualityNode.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-from typing import Optional, Dict, cast
+from typing import Optional, Dict, cast, Any
 
 from .ContainerNode import ContainerNode
 from .QualityChangesGroup import QualityChangesGroup
@@ -12,18 +12,21 @@ from .QualityChangesGroup import QualityChangesGroup
 #
 class QualityNode(ContainerNode):
 
-    def __init__(self, metadata: Optional[dict] = None) -> None:
+    def __init__(self, metadata: Optional[Dict[str, Any]] = None) -> None:
         super().__init__(metadata = metadata)
         self.quality_type_map = {}  # type: Dict[str, QualityNode] # quality_type -> QualityNode for InstanceContainer
 
-    def addQualityMetadata(self, quality_type: str, metadata: dict):
+    def getChildNode(self, child_key: str) -> Optional["QualityNode"]:
+        return self.children_map.get(child_key)
+
+    def addQualityMetadata(self, quality_type: str, metadata: Dict[str, Any]):
         if quality_type not in self.quality_type_map:
             self.quality_type_map[quality_type] = QualityNode(metadata)
 
     def getQualityNode(self, quality_type: str) -> Optional["QualityNode"]:
         return self.quality_type_map.get(quality_type)
 
-    def addQualityChangesMetadata(self, quality_type: str, metadata: dict):
+    def addQualityChangesMetadata(self, quality_type: str, metadata: Dict[str, Any]):
         if quality_type not in self.quality_type_map:
             self.quality_type_map[quality_type] = QualityNode()
         quality_type_node = self.quality_type_map[quality_type]

cura/Machines/VariantManager.py

@@ -2,7 +2,7 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from collections import OrderedDict
-from typing import Optional, TYPE_CHECKING
+from typing import Optional, TYPE_CHECKING, Dict
 
 from UM.ConfigurationErrorMessage import ConfigurationErrorMessage
 from UM.Logger import Logger
@@ -36,11 +36,11 @@ if TYPE_CHECKING:
 #
 class VariantManager:
 
-    def __init__(self, container_registry):
+    def __init__(self, container_registry: ContainerRegistry) -> None:
-        self._container_registry = container_registry  # type: ContainerRegistry
+        self._container_registry = container_registry
 
-        self._machine_to_variant_dict_map = dict()  # <machine_type> -> <variant_dict>
+        self._machine_to_variant_dict_map = dict()  # type: Dict[str, Dict["VariantType", Dict[str, ContainerNode]]]
-        self._machine_to_buildplate_dict_map = dict()
+        self._machine_to_buildplate_dict_map = dict() # type: Dict[str, Dict[str, ContainerNode]]
 
         self._exclude_variant_id_list = ["empty_variant"]
 
@@ -48,7 +48,7 @@ class VariantManager:
     # Initializes the VariantManager including:
     #  - initializing the variant lookup table based on the metadata in ContainerRegistry.
     #
-    def initialize(self):
+    def initialize(self) -> None:
         self._machine_to_variant_dict_map = OrderedDict()
         self._machine_to_buildplate_dict_map = OrderedDict()
 
@@ -106,10 +106,10 @@ class VariantManager:
                     variant_node = variant_dict[variant_name]
                     break
             return variant_node
+
         return self._machine_to_variant_dict_map[machine_definition_id].get(variant_type, {}).get(variant_name)
 
-    def getVariantNodes(self, machine: "GlobalStack",
+    def getVariantNodes(self, machine: "GlobalStack", variant_type: "VariantType") -> Dict[str, ContainerNode]:
-                        variant_type: Optional["VariantType"] = None) -> dict:
         machine_definition_id = machine.definition.getId()
         return self._machine_to_variant_dict_map.get(machine_definition_id, {}).get(variant_type, {})
 

cura/PrintInformation.py

@@ -300,7 +300,7 @@ class PrintInformation(QObject):
 
     def _updateJobName(self):
         if self._base_name == "":
-            self._job_name = "unnamed"
+            self._job_name = "Untitled"
             self._is_user_specified_job_name = False
             self.jobNameChanged.emit()
             return

cura/PrintJobPreviewImageProvider.py

@@ -0,0 +1,27 @@
+from PyQt5.QtGui import QImage
+from PyQt5.QtQuick import QQuickImageProvider
+from PyQt5.QtCore import QSize
+
+from UM.Application import Application
+
+
+class PrintJobPreviewImageProvider(QQuickImageProvider):
+    def __init__(self):
+        super().__init__(QQuickImageProvider.Image)
+
+    ##  Request a new image.
+    def requestImage(self, id: str, size: QSize) -> QImage:
+        # The id will have an uuid and an increment separated by a slash. As we don't care about the value of the
+        # increment, we need to strip that first.
+        uuid = id[id.find("/") + 1:]
+        for output_device in Application.getInstance().getOutputDeviceManager().getOutputDevices():
+            if not hasattr(output_device, "printJobs"):
+                continue
+
+            for print_job in output_device.printJobs:
+                if print_job.key == uuid:
+                    if print_job.getPreviewImage():
+                        return print_job.getPreviewImage(), QSize(15, 15)
+                    else:
+                        return QImage(), QSize(15, 15)
+        return QImage(), QSize(15,15)

cura/PrinterOutput/ConfigurationModel.py

@@ -13,36 +13,42 @@ class ConfigurationModel(QObject):
 
     configurationChanged = pyqtSignal()
 
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
-        self._printer_type = None
+        self._printer_type = ""
         self._extruder_configurations = []     # type: List[ExtruderConfigurationModel]
-        self._buildplate_configuration = None
+        self._buildplate_configuration = ""
 
     def setPrinterType(self, printer_type):
         self._printer_type = printer_type
 
     @pyqtProperty(str, fset = setPrinterType, notify = configurationChanged)
-    def printerType(self):
+    def printerType(self) -> str:
         return self._printer_type
 
-    def setExtruderConfigurations(self, extruder_configurations):
+    def setExtruderConfigurations(self, extruder_configurations: List["ExtruderConfigurationModel"]):
-        self._extruder_configurations = extruder_configurations
+        if self._extruder_configurations != extruder_configurations:
+            self._extruder_configurations = extruder_configurations
+
+            for extruder_configuration in self._extruder_configurations:
+                extruder_configuration.extruderConfigurationChanged.connect(self.configurationChanged)
+
+            self.configurationChanged.emit()
 
     @pyqtProperty("QVariantList", fset = setExtruderConfigurations, notify = configurationChanged)
     def extruderConfigurations(self):
         return self._extruder_configurations
 
-    def setBuildplateConfiguration(self, buildplate_configuration):
+    def setBuildplateConfiguration(self, buildplate_configuration: str) -> None:
         self._buildplate_configuration = buildplate_configuration
 
     @pyqtProperty(str, fset = setBuildplateConfiguration, notify = configurationChanged)
-    def buildplateConfiguration(self):
+    def buildplateConfiguration(self) -> str:
         return self._buildplate_configuration
 
     ##  This method is intended to indicate whether the configuration is valid or not.
     #   The method checks if the mandatory fields are or not set
-    def isValid(self):
+    def isValid(self) -> bool:
         if not self._extruder_configurations:
             return False
         for configuration in self._extruder_configurations:

cura/PrinterOutput/ExtruderConfigurationModel.py

@@ -1,56 +1,67 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
+from typing import Optional
 
 from PyQt5.QtCore import pyqtProperty, QObject, pyqtSignal
 
+from cura.PrinterOutput.MaterialOutputModel import MaterialOutputModel
+
 
 class ExtruderConfigurationModel(QObject):
 
     extruderConfigurationChanged = pyqtSignal()
 
-    def __init__(self):
+    def __init__(self, position: int = -1) -> None:
         super().__init__()
-        self._position = -1
+        self._position = position  # type: int
-        self._material = None
+        self._material = None  # type: Optional[MaterialOutputModel]
-        self._hotend_id = None
+        self._hotend_id = None  # type: Optional[str]
 
-    def setPosition(self, position):
+    def setPosition(self, position: int) -> None:
         self._position = position
 
     @pyqtProperty(int, fset = setPosition, notify = extruderConfigurationChanged)
-    def position(self):
+    def position(self) -> int:
         return self._position
 
-    def setMaterial(self, material):
+    def setMaterial(self, material: Optional[MaterialOutputModel]) -> None:
-        self._material = material
+        if self._hotend_id != material:
+            self._material = material
+            self.extruderConfigurationChanged.emit()
 
     @pyqtProperty(QObject, fset = setMaterial, notify = extruderConfigurationChanged)
-    def material(self):
+    def activeMaterial(self) -> Optional[MaterialOutputModel]:
         return self._material
 
-    def setHotendID(self, hotend_id):
+    @pyqtProperty(QObject, fset=setMaterial, notify=extruderConfigurationChanged)
-        self._hotend_id = hotend_id
+    def material(self) -> Optional[MaterialOutputModel]:
+        return self._material
+
+    def setHotendID(self, hotend_id: Optional[str]) -> None:
+        if self._hotend_id != hotend_id:
+            self._hotend_id = hotend_id
+            self.extruderConfigurationChanged.emit()
 
     @pyqtProperty(str, fset = setHotendID, notify = extruderConfigurationChanged)
-    def hotendID(self):
+    def hotendID(self) -> Optional[str]:
         return self._hotend_id
 
     ##  This method is intended to indicate whether the configuration is valid or not.
     #   The method checks if the mandatory fields are or not set
     #   At this moment is always valid since we allow to have empty material and variants.
-    def isValid(self):
+    def isValid(self) -> bool:
         return True
 
-    def __str__(self):
+    def __str__(self) -> str:
         message_chunks = []
         message_chunks.append("Position: " + str(self._position))
         message_chunks.append("-")
-        message_chunks.append("Material: " + self.material.type if self.material else "empty")
+        message_chunks.append("Material: " + self.activeMaterial.type if self.activeMaterial else "empty")
         message_chunks.append("-")
         message_chunks.append("HotendID: " + self.hotendID if self.hotendID else "empty")
         return " ".join(message_chunks)
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         return hash(self) == hash(other)
 
     #   Calculating a hash function using the position of the extruder, the material GUID and the hotend id to check if is

cura/PrinterOutput/ExtruderOutputModel.py

@@ -12,64 +12,61 @@ if TYPE_CHECKING:
 
 
 class ExtruderOutputModel(QObject):
-    hotendIDChanged = pyqtSignal()
     targetHotendTemperatureChanged = pyqtSignal()
     hotendTemperatureChanged = pyqtSignal()
-    activeMaterialChanged = pyqtSignal()
+
     extruderConfigurationChanged = pyqtSignal()
     isPreheatingChanged = pyqtSignal()
 
-    def __init__(self, printer: "PrinterOutputModel", position, parent=None) -> None:
+    def __init__(self, printer: "PrinterOutputModel", position: int, parent=None) -> None:
         super().__init__(parent)
-        self._printer = printer
+        self._printer = printer  # type: PrinterOutputModel
         self._position = position
-        self._target_hotend_temperature = 0 # type: float
+        self._target_hotend_temperature = 0.0  # type: float
-        self._hotend_temperature = 0 # type: float
+        self._hotend_temperature = 0.0  # type: float
-        self._hotend_id = ""
-        self._active_material = None  # type: Optional[MaterialOutputModel]
-        self._extruder_configuration = ExtruderConfigurationModel()
-        self._extruder_configuration.position = self._position
 
         self._is_preheating = False
 
-    def getPrinter(self):
+        # The extruder output model wraps the configuration model. This way we can use the same config model for jobs
+        # and extruders alike.
+        self._extruder_configuration = ExtruderConfigurationModel()
+        self._extruder_configuration.position = self._position
+        self._extruder_configuration.extruderConfigurationChanged.connect(self.extruderConfigurationChanged)
+
+    def getPrinter(self) -> "PrinterOutputModel":
         return self._printer
 
-    def getPosition(self):
+    def getPosition(self) -> int:
         return self._position
 
     # Does the printer support pre-heating the bed at all
     @pyqtProperty(bool, constant=True)
-    def canPreHeatHotends(self):
+    def canPreHeatHotends(self) -> bool:
         if self._printer:
             return self._printer.canPreHeatHotends
         return False
 
-    @pyqtProperty(QObject, notify = activeMaterialChanged)
+    @pyqtProperty(QObject, notify = extruderConfigurationChanged)
     def activeMaterial(self) -> Optional["MaterialOutputModel"]:
-        return self._active_material
+        return self._extruder_configuration.activeMaterial
 
-    def updateActiveMaterial(self, material: Optional["MaterialOutputModel"]):
+    def updateActiveMaterial(self, material: Optional["MaterialOutputModel"]) -> None:
-        if self._active_material != material:
+        self._extruder_configuration.setMaterial(material)
-            self._active_material = material
-            self._extruder_configuration.material = self._active_material
-            self.activeMaterialChanged.emit()
-            self.extruderConfigurationChanged.emit()
 
     ##  Update the hotend temperature. This only changes it locally.
-    def updateHotendTemperature(self, temperature: float):
+    def updateHotendTemperature(self, temperature: float) -> None:
         if self._hotend_temperature != temperature:
             self._hotend_temperature = temperature
             self.hotendTemperatureChanged.emit()
 
-    def updateTargetHotendTemperature(self, temperature: float):
+    def updateTargetHotendTemperature(self, temperature: float) -> None:
         if self._target_hotend_temperature != temperature:
             self._target_hotend_temperature = temperature
             self.targetHotendTemperatureChanged.emit()
 
     ##  Set the target hotend temperature. This ensures that it's actually sent to the remote.
     @pyqtSlot(float)
-    def setTargetHotendTemperature(self, temperature: float):
+    def setTargetHotendTemperature(self, temperature: float) -> None:
         self._printer.getController().setTargetHotendTemperature(self._printer, self, temperature)
         self.updateTargetHotendTemperature(temperature)
 
@@ -81,30 +78,26 @@ class ExtruderOutputModel(QObject):
     def hotendTemperature(self) -> float:
         return self._hotend_temperature
 
-    @pyqtProperty(str, notify = hotendIDChanged)
+    @pyqtProperty(str, notify = extruderConfigurationChanged)
     def hotendID(self) -> str:
-        return self._hotend_id
+        return self._extruder_configuration.hotendID
 
-    def updateHotendID(self, id: str):
+    def updateHotendID(self, hotend_id: str) -> None:
-        if self._hotend_id != id:
+        self._extruder_configuration.setHotendID(hotend_id)
-            self._hotend_id = id
-            self._extruder_configuration.hotendID = self._hotend_id
-            self.hotendIDChanged.emit()
-            self.extruderConfigurationChanged.emit()
 
     @pyqtProperty(QObject, notify = extruderConfigurationChanged)
-    def extruderConfiguration(self):
+    def extruderConfiguration(self) -> Optional[ExtruderConfigurationModel]:
         if self._extruder_configuration.isValid():
             return self._extruder_configuration
         return None
 
-    def updateIsPreheating(self, pre_heating):
+    def updateIsPreheating(self, pre_heating: bool) -> None:
         if self._is_preheating != pre_heating:
             self._is_preheating = pre_heating
             self.isPreheatingChanged.emit()
 
     @pyqtProperty(bool, notify=isPreheatingChanged)
-    def isPreheating(self):
+    def isPreheating(self) -> bool:
         return self._is_preheating
 
     ##  Pre-heats the extruder before printer.
@@ -113,9 +106,9 @@ class ExtruderOutputModel(QObject):
     #   Celsius.
     #   \param duration How long the bed should stay warm, in seconds.
     @pyqtSlot(float, float)
-    def preheatHotend(self, temperature, duration):
+    def preheatHotend(self, temperature: float, duration: float) -> None:
         self._printer._controller.preheatHotend(self, temperature, duration)
 
     @pyqtSlot()
-    def cancelPreheatHotend(self):
+    def cancelPreheatHotend(self) -> None:
-        self._printer._controller.cancelPreheatHotend(self)
+        self._printer._controller.cancelPreheatHotend(self)

cura/PrinterOutput/NetworkedPrinterOutputDevice.py

@@ -53,21 +53,8 @@ class NetworkedPrinterOutputDevice(PrinterOutputDevice):
         self._sending_gcode = False
         self._compressing_gcode = False
         self._gcode = []                    # type: List[str]
-
         self._connection_state_before_timeout = None    # type: Optional[ConnectionState]
 
-        printer_type = self._properties.get(b"machine", b"").decode("utf-8")
-        printer_type_identifiers = {
-            "9066": "ultimaker3",
-            "9511": "ultimaker3_extended",
-            "9051": "ultimaker_s5"
-        }
-        self._printer_type = "Unknown"
-        for key, value in printer_type_identifiers.items():
-            if printer_type.startswith(key):
-                self._printer_type = value
-                break
-
     def requestWrite(self, nodes: List[SceneNode], file_name: Optional[str] = None, limit_mimetypes: bool = False, file_handler: Optional[FileHandler] = None, **kwargs: str) -> None:
         raise NotImplementedError("requestWrite needs to be implemented")
 
@@ -188,40 +175,55 @@ class NetworkedPrinterOutputDevice(PrinterOutputDevice):
         if reply in self._kept_alive_multiparts:
             del self._kept_alive_multiparts[reply]
 
-    def put(self, target: str, data: str, on_finished: Optional[Callable[[QNetworkReply], None]]) -> None:
+    def _validateManager(self) -> None:
         if self._manager is None:
             self._createNetworkManager()
         assert (self._manager is not None)
+
+    def put(self, target: str, data: str, on_finished: Optional[Callable[[QNetworkReply], None]]) -> None:
+        self._validateManager()
         request = self._createEmptyRequest(target)
         self._last_request_time = time()
-        reply = self._manager.put(request, data.encode())
+        if self._manager is not None:
-        self._registerOnFinishedCallback(reply, on_finished)
+            reply = self._manager.put(request, data.encode())
+            self._registerOnFinishedCallback(reply, on_finished)
+        else:
+            Logger.log("e", "Could not find manager.")
+
+    def delete(self, target: str, on_finished: Optional[Callable[[QNetworkReply], None]]) -> None:
+        self._validateManager()
+        request = self._createEmptyRequest(target)
+        self._last_request_time = time()
+        if self._manager is not None:
+            reply = self._manager.deleteResource(request)
+            self._registerOnFinishedCallback(reply, on_finished)
+        else:
+            Logger.log("e", "Could not find manager.")
 
     def get(self, target: str, on_finished: Optional[Callable[[QNetworkReply], None]]) -> None:
-        if self._manager is None:
+        self._validateManager()
-            self._createNetworkManager()
-        assert (self._manager is not None)
         request = self._createEmptyRequest(target)
         self._last_request_time = time()
-        reply = self._manager.get(request)
+        if self._manager is not None:
-        self._registerOnFinishedCallback(reply, on_finished)
+            reply = self._manager.get(request)
+            self._registerOnFinishedCallback(reply, on_finished)
+        else:
+            Logger.log("e", "Could not find manager.")
 
     def post(self, target: str, data: str, on_finished: Optional[Callable[[QNetworkReply], None]], on_progress: Callable = None) -> None:
-        if self._manager is None:
+        self._validateManager()
-            self._createNetworkManager()
-        assert (self._manager is not None)
         request = self._createEmptyRequest(target)
         self._last_request_time = time()
-        reply = self._manager.post(request, data)
+        if self._manager is not None:
-        if on_progress is not None:
+            reply = self._manager.post(request, data)
-            reply.uploadProgress.connect(on_progress)
+            if on_progress is not None:
-        self._registerOnFinishedCallback(reply, on_finished)
+                reply.uploadProgress.connect(on_progress)
+            self._registerOnFinishedCallback(reply, on_finished)
+        else:
+            Logger.log("e", "Could not find manager.")
 
     def postFormWithParts(self, target: str, parts: List[QHttpPart], on_finished: Optional[Callable[[QNetworkReply], None]], on_progress: Callable = None) -> QNetworkReply:
-
+        self._validateManager()
-        if self._manager is None:
-            self._createNetworkManager()
-        assert (self._manager is not None)
         request = self._createEmptyRequest(target, content_type=None)
         multi_post_part = QHttpMultiPart(QHttpMultiPart.FormDataType)
         for part in parts:
@@ -229,15 +231,18 @@ class NetworkedPrinterOutputDevice(PrinterOutputDevice):
 
         self._last_request_time = time()
 
-        reply = self._manager.post(request, multi_post_part)
+        if self._manager is not None:
+            reply = self._manager.post(request, multi_post_part)
 
-        self._kept_alive_multiparts[reply] = multi_post_part
+            self._kept_alive_multiparts[reply] = multi_post_part
 
-        if on_progress is not None:
+            if on_progress is not None:
-            reply.uploadProgress.connect(on_progress)
+                reply.uploadProgress.connect(on_progress)
-        self._registerOnFinishedCallback(reply, on_finished)
+            self._registerOnFinishedCallback(reply, on_finished)
 
-        return reply
+            return reply
+        else:
+            Logger.log("e", "Could not find manager.")
 
     def postForm(self, target: str, header_data: str, body_data: bytes, on_finished: Optional[Callable[[QNetworkReply], None]], on_progress: Callable = None) -> None:
         post_part = QHttpPart()
@@ -323,7 +328,7 @@ class NetworkedPrinterOutputDevice(PrinterOutputDevice):
 
     @pyqtProperty(str, constant = True)
     def printerType(self) -> str:
-        return self._printer_type
+        return self._properties.get(b"printer_type", b"Unknown").decode("utf-8")
 
     ## IP adress of this printer
     @pyqtProperty(str, constant = True)

cura/PrinterOutput/PrintJobOutputModel.py

@@ -2,11 +2,15 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from PyQt5.QtCore import pyqtSignal, pyqtProperty, QObject, pyqtSlot
-from typing import Optional, TYPE_CHECKING
+from typing import Optional, TYPE_CHECKING, List
+
+from PyQt5.QtCore import QUrl
+from PyQt5.QtGui import QImage
 
 if TYPE_CHECKING:
     from cura.PrinterOutput.PrinterOutputController import PrinterOutputController
     from cura.PrinterOutput.PrinterOutputModel import PrinterOutputModel
+    from cura.PrinterOutput.ConfigurationModel import ConfigurationModel
 
 
 class PrintJobOutputModel(QObject):
@@ -17,6 +21,9 @@ class PrintJobOutputModel(QObject):
     keyChanged = pyqtSignal()
     assignedPrinterChanged = pyqtSignal()
     ownerChanged = pyqtSignal()
+    configurationChanged = pyqtSignal()
+    previewImageChanged = pyqtSignal()
+    compatibleMachineFamiliesChanged = pyqtSignal()
 
     def __init__(self, output_controller: "PrinterOutputController", key: str = "", name: str = "", parent=None) -> None:
         super().__init__(parent)
@@ -29,6 +36,48 @@ class PrintJobOutputModel(QObject):
         self._assigned_printer = None  # type: Optional[PrinterOutputModel]
         self._owner = ""  # Who started/owns the print job?
 
+        self._configuration = None  # type: Optional[ConfigurationModel]
+        self._compatible_machine_families = []  # type: List[str]
+        self._preview_image_id = 0
+
+        self._preview_image = None  # type: Optional[QImage]
+
+    @pyqtProperty("QStringList", notify=compatibleMachineFamiliesChanged)
+    def compatibleMachineFamilies(self):
+        # Hack; Some versions of cluster will return a family more than once...
+        return set(self._compatible_machine_families)
+
+    def setCompatibleMachineFamilies(self, compatible_machine_families: List[str]) -> None:
+        if self._compatible_machine_families != compatible_machine_families:
+            self._compatible_machine_families = compatible_machine_families
+            self.compatibleMachineFamiliesChanged.emit()
+
+    @pyqtProperty(QUrl, notify=previewImageChanged)
+    def previewImageUrl(self):
+        self._preview_image_id += 1
+        # There is an image provider that is called "camera". In order to ensure that the image qml object, that
+        # requires a QUrl to function, updates correctly we add an increasing number. This causes to see the QUrl
+        # as new (instead of relying on cached version and thus forces an update.
+        temp = "image://print_job_preview/" + str(self._preview_image_id) + "/" + self._key
+        return QUrl(temp, QUrl.TolerantMode)
+
+    def getPreviewImage(self) -> Optional[QImage]:
+        return self._preview_image
+
+    def updatePreviewImage(self, preview_image: Optional[QImage]) -> None:
+        if self._preview_image != preview_image:
+            self._preview_image = preview_image
+            self.previewImageChanged.emit()
+
+    @pyqtProperty(QObject, notify=configurationChanged)
+    def configuration(self) -> Optional["ConfigurationModel"]:
+        return self._configuration
+
+    def updateConfiguration(self, configuration: Optional["ConfigurationModel"]) -> None:
+        if self._configuration != configuration:
+            self._configuration = configuration
+            self.configurationChanged.emit()
+
     @pyqtProperty(str, notify=ownerChanged)
     def owner(self):
         return self._owner

cura/PrinterOutput/PrinterOutputModel.py

@@ -37,7 +37,7 @@ class PrinterOutputModel(QObject):
         self._controller = output_controller
         self._controller.canUpdateFirmwareChanged.connect(self._onControllerCanUpdateFirmwareChanged)
         self._extruders = [ExtruderOutputModel(printer = self, position = i) for i in range(number_of_extruders)]
-        self._printer_configuration = ConfigurationModel()    # Indicates the current configuration setup in this printer
+        self._printer_configuration = ConfigurationModel()  # Indicates the current configuration setup in this printer
         self._head_position = Vector(0, 0, 0)
         self._active_print_job = None  # type: Optional[PrintJobOutputModel]
         self._firmware_version = firmware_version
@@ -45,9 +45,9 @@ class PrinterOutputModel(QObject):
         self._is_preheating = False
         self._printer_type = ""
         self._buildplate_name = None
-        # Update the printer configuration every time any of the extruders changes its configuration
+
-        for extruder in self._extruders:
+        self._printer_configuration.extruderConfigurations = [extruder.extruderConfiguration for extruder in
-            extruder.extruderConfigurationChanged.connect(self._updateExtruderConfiguration)
+                                                              self._extruders]
 
         self._camera = None
 
@@ -295,8 +295,4 @@ class PrinterOutputModel(QObject):
     def printerConfiguration(self):
         if self._printer_configuration.isValid():
             return self._printer_configuration
-        return None
+        return None
-
-    def _updateExtruderConfiguration(self):
-        self._printer_configuration.extruderConfigurations = [extruder.extruderConfiguration for extruder in self._extruders]
-        self.configurationChanged.emit()

cura/Scene/ConvexHullDecorator.py

@@ -13,23 +13,31 @@ from cura.Scene import ConvexHullNode
 
 import numpy
 
+from typing import TYPE_CHECKING, Any, Optional
+
+if TYPE_CHECKING:
+    from UM.Scene.SceneNode import SceneNode
+    from cura.Settings.GlobalStack import GlobalStack
+
+
 ##  The convex hull decorator is a scene node decorator that adds the convex hull functionality to a scene node.
 #   If a scene node has a convex hull decorator, it will have a shadow in which other objects can not be printed.
 class ConvexHullDecorator(SceneNodeDecorator):
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
 
-        self._convex_hull_node = None
+        self._convex_hull_node = None  # type: Optional["SceneNode"]
         self._init2DConvexHullCache()
 
-        self._global_stack = None
+        self._global_stack = None  # type: Optional[GlobalStack]
 
         # Make sure the timer is created on the main thread
-        self._recompute_convex_hull_timer = None
+        self._recompute_convex_hull_timer = None  # type: Optional[QTimer]
-        Application.getInstance().callLater(self.createRecomputeConvexHullTimer)
+
+        if Application.getInstance() is not None:
+            Application.getInstance().callLater(self.createRecomputeConvexHullTimer)
 
         self._raft_thickness = 0.0
-        # For raft thickness, DRY
         self._build_volume = Application.getInstance().getBuildVolume()
         self._build_volume.raftThicknessChanged.connect(self._onChanged)
 
@@ -39,13 +47,13 @@ class ConvexHullDecorator(SceneNodeDecorator):
 
         self._onGlobalStackChanged()
 
-    def createRecomputeConvexHullTimer(self):
+    def createRecomputeConvexHullTimer(self) -> None:
         self._recompute_convex_hull_timer = QTimer()
         self._recompute_convex_hull_timer.setInterval(200)
         self._recompute_convex_hull_timer.setSingleShot(True)
         self._recompute_convex_hull_timer.timeout.connect(self.recomputeConvexHull)
 
-    def setNode(self, node):
+    def setNode(self, node: "SceneNode") -> None:
         previous_node = self._node
         # Disconnect from previous node signals
         if previous_node is not None and node is not previous_node:
@@ -63,14 +71,14 @@ class ConvexHullDecorator(SceneNodeDecorator):
     def __deepcopy__(self, memo):
         return ConvexHullDecorator()
 
-    ##  Get the unmodified 2D projected convex hull of the node
+    ##  Get the unmodified 2D projected convex hull of the node (if any)
-    def getConvexHull(self):
+    def getConvexHull(self) -> Optional[Polygon]:
         if self._node is None:
             return None
 
         hull = self._compute2DConvexHull()
 
-        if self._global_stack and self._node:
+        if self._global_stack and self._node and hull is not None:
             # Parent can be None if node is just loaded.
             if self._global_stack.getProperty("print_sequence", "value") == "one_at_a_time" and (self._node.getParent() is None or not self._node.getParent().callDecoration("isGroup")):
                 hull = hull.getMinkowskiHull(Polygon(numpy.array(self._global_stack.getProperty("machine_head_polygon", "value"), numpy.float32)))
@@ -78,7 +86,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
         return hull
 
     ##  Get the convex hull of the node with the full head size
-    def getConvexHullHeadFull(self):
+    def getConvexHullHeadFull(self) -> Optional[Polygon]:
         if self._node is None:
             return None
 
@@ -87,7 +95,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
     ##  Get convex hull of the object + head size
     #   In case of printing all at once this is the same as the convex hull.
     #   For one at the time this is area with intersection of mirrored head
-    def getConvexHullHead(self):
+    def getConvexHullHead(self) -> Optional[Polygon]:
         if self._node is None:
             return None
 
@@ -101,7 +109,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
     ##  Get convex hull of the node
     #   In case of printing all at once this is the same as the convex hull.
     #   For one at the time this is the area without the head.
-    def getConvexHullBoundary(self):
+    def getConvexHullBoundary(self) -> Optional[Polygon]:
         if self._node is None:
             return None
 
@@ -111,13 +119,14 @@ class ConvexHullDecorator(SceneNodeDecorator):
                 return self._compute2DConvexHull()
         return None
 
-    def recomputeConvexHullDelayed(self):
+    ##  The same as recomputeConvexHull, but using a timer if it was set.
+    def recomputeConvexHullDelayed(self) -> None:
         if self._recompute_convex_hull_timer is not None:
             self._recompute_convex_hull_timer.start()
         else:
             self.recomputeConvexHull()
 
-    def recomputeConvexHull(self):
+    def recomputeConvexHull(self) -> None:
         controller = Application.getInstance().getController()
         root = controller.getScene().getRoot()
         if self._node is None or controller.isToolOperationActive() or not self.__isDescendant(root, self._node):
@@ -132,17 +141,17 @@ class ConvexHullDecorator(SceneNodeDecorator):
         hull_node = ConvexHullNode.ConvexHullNode(self._node, convex_hull, self._raft_thickness, root)
         self._convex_hull_node = hull_node
 
-    def _onSettingValueChanged(self, key, property_name):
+    def _onSettingValueChanged(self, key: str, property_name: str) -> None:
-        if property_name != "value": #Not the value that was changed.
+        if property_name != "value":  # Not the value that was changed.
             return
 
         if key in self._affected_settings:
             self._onChanged()
         if key in self._influencing_settings:
-            self._init2DConvexHullCache() #Invalidate the cache.
+            self._init2DConvexHullCache()  # Invalidate the cache.
             self._onChanged()
 
-    def _init2DConvexHullCache(self):
+    def _init2DConvexHullCache(self) -> None:
         # Cache for the group code path in _compute2DConvexHull()
         self._2d_convex_hull_group_child_polygon = None
         self._2d_convex_hull_group_result = None
@@ -152,7 +161,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
         self._2d_convex_hull_mesh_world_transform = None
         self._2d_convex_hull_mesh_result = None
 
-    def _compute2DConvexHull(self):
+    def _compute2DConvexHull(self) -> Optional[Polygon]:
         if self._node.callDecoration("isGroup"):
             points = numpy.zeros((0, 2), dtype=numpy.int32)
             for child in self._node.getChildren():
@@ -179,8 +188,6 @@ class ConvexHullDecorator(SceneNodeDecorator):
 
         else:
             offset_hull = None
-            mesh = None
-            world_transform = None
             if self._node.getMeshData():
                 mesh = self._node.getMeshData()
                 world_transform = self._node.getWorldTransformation()
@@ -228,24 +235,33 @@ class ConvexHullDecorator(SceneNodeDecorator):
 
             return offset_hull
 
-    def _getHeadAndFans(self):
+    def _getHeadAndFans(self) -> Polygon:
-        return Polygon(numpy.array(self._global_stack.getHeadAndFansCoordinates(), numpy.float32))
+        if self._global_stack:
+            return Polygon(numpy.array(self._global_stack.getHeadAndFansCoordinates(), numpy.float32))
+        return Polygon()
 
-    def _compute2DConvexHeadFull(self):
+    def _compute2DConvexHeadFull(self) -> Optional[Polygon]:
-        return self._compute2DConvexHull().getMinkowskiHull(self._getHeadAndFans())
+        convex_hull = self._compute2DConvexHeadFull()
+        if convex_hull:
+            return convex_hull.getMinkowskiHull(self._getHeadAndFans())
+        return None
 
-    def _compute2DConvexHeadMin(self):
+    def _compute2DConvexHeadMin(self) -> Optional[Polygon]:
-        headAndFans = self._getHeadAndFans()
+        head_and_fans = self._getHeadAndFans()
-        mirrored = headAndFans.mirror([0, 0], [0, 1]).mirror([0, 0], [1, 0])  # Mirror horizontally & vertically.
+        mirrored = head_and_fans.mirror([0, 0], [0, 1]).mirror([0, 0], [1, 0])  # Mirror horizontally & vertically.
         head_and_fans = self._getHeadAndFans().intersectionConvexHulls(mirrored)
 
         # Min head hull is used for the push free
-        min_head_hull = self._compute2DConvexHull().getMinkowskiHull(head_and_fans)
+        convex_hull = self._compute2DConvexHeadFull()
-        return min_head_hull
+        if convex_hull:
+            return convex_hull.getMinkowskiHull(head_and_fans)
+        return None
 
     ##  Compensate given 2D polygon with adhesion margin
     #   \return 2D polygon with added margin
-    def _add2DAdhesionMargin(self, poly):
+    def _add2DAdhesionMargin(self, poly: Polygon) -> Polygon:
+        if not self._global_stack:
+            return Polygon()
         # Compensate for raft/skirt/brim
         # Add extra margin depending on adhesion type
         adhesion_type = self._global_stack.getProperty("adhesion_type", "value")
@@ -263,7 +279,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
         else:
             raise Exception("Unknown bed adhesion type. Did you forget to update the convex hull calculations for your new bed adhesion type?")
 
-        # adjust head_and_fans with extra margin
+        # Adjust head_and_fans with extra margin
         if extra_margin > 0:
             extra_margin_polygon = Polygon.approximatedCircle(extra_margin)
             poly = poly.getMinkowskiHull(extra_margin_polygon)
@@ -274,7 +290,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
     #   \param convex_hull Polygon of the original convex hull.
     #   \return New Polygon instance that is offset with everything that
     #   influences the collision area.
-    def _offsetHull(self, convex_hull):
+    def _offsetHull(self, convex_hull: Polygon) -> Polygon:
         horizontal_expansion = max(
             self._getSettingProperty("xy_offset", "value"),
             self._getSettingProperty("xy_offset_layer_0", "value")
@@ -295,16 +311,16 @@ class ConvexHullDecorator(SceneNodeDecorator):
         else:
             return convex_hull
 
-    def _onChanged(self, *args):
+    def _onChanged(self, *args) -> None:
         self._raft_thickness = self._build_volume.getRaftThickness()
         if not args or args[0] == self._node:
             self.recomputeConvexHullDelayed()
 
-    def _onGlobalStackChanged(self):
+    def _onGlobalStackChanged(self) -> None:
         if self._global_stack:
             self._global_stack.propertyChanged.disconnect(self._onSettingValueChanged)
             self._global_stack.containersChanged.disconnect(self._onChanged)
-            extruders = ExtruderManager.getInstance().getMachineExtruders(self._global_stack.getId())
+            extruders = ExtruderManager.getInstance().getActiveExtruderStacks()
             for extruder in extruders:
                 extruder.propertyChanged.disconnect(self._onSettingValueChanged)
 
@@ -314,14 +330,16 @@ class ConvexHullDecorator(SceneNodeDecorator):
             self._global_stack.propertyChanged.connect(self._onSettingValueChanged)
             self._global_stack.containersChanged.connect(self._onChanged)
 
-            extruders = ExtruderManager.getInstance().getMachineExtruders(self._global_stack.getId())
+            extruders = ExtruderManager.getInstance().getActiveExtruderStacks()
             for extruder in extruders:
                 extruder.propertyChanged.connect(self._onSettingValueChanged)
 
             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, prop = "value"):
+    def _getSettingProperty(self, setting_key: str, prop: str = "value") -> Any:
+        if not self._global_stack:
+            return None
         per_mesh_stack = self._node.callDecoration("getStack")
         if per_mesh_stack:
             return per_mesh_stack.getProperty(setting_key, prop)
@@ -339,8 +357,8 @@ class ConvexHullDecorator(SceneNodeDecorator):
             # 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.
+    ##  Returns True if node is a descendant or the same as the root node.
-    def __isDescendant(self, root, node):
+    def __isDescendant(self, root: "SceneNode", node: "SceneNode") -> bool:
         if node is None:
             return False
         if root is node:

cura/Scene/GCodeListDecorator.py

@@ -1,13 +1,19 @@
 from UM.Scene.SceneNodeDecorator import SceneNodeDecorator
+from typing import List
 
 
 class GCodeListDecorator(SceneNodeDecorator):
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
-        self._gcode_list = []
+        self._gcode_list = []  # type: List[str]
 
-    def getGCodeList(self):
+    def getGCodeList(self) -> List[str]:
         return self._gcode_list
 
-    def setGCodeList(self, list):
+    def setGCodeList(self, list: List[str]):
         self._gcode_list = list
+
+    def __deepcopy__(self, memo) -> "GCodeListDecorator":
+        copied_decorator = GCodeListDecorator()
+        copied_decorator.setGCodeList(self.getGCodeList())
+        return copied_decorator

cura/Scene/SliceableObjectDecorator.py

@@ -2,11 +2,11 @@ from UM.Scene.SceneNodeDecorator import SceneNodeDecorator
 
 
 class SliceableObjectDecorator(SceneNodeDecorator):
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
         
-    def isSliceable(self):
+    def isSliceable(self) -> bool:
         return True
 
-    def __deepcopy__(self, memo):
+    def __deepcopy__(self, memo) -> "SliceableObjectDecorator":
         return type(self)()

cura/Scene/ZOffsetDecorator.py

@@ -1,18 +1,19 @@
 from UM.Scene.SceneNodeDecorator import SceneNodeDecorator
 
+
 ##  A decorator that stores the amount an object has been moved below the platform.
 class ZOffsetDecorator(SceneNodeDecorator):
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
-        self._z_offset = 0
+        self._z_offset = 0.
 
-    def setZOffset(self, offset):
+    def setZOffset(self, offset: float) -> None:
         self._z_offset = offset
 
-    def getZOffset(self):
+    def getZOffset(self) -> float:
         return self._z_offset
 
-    def __deepcopy__(self, memo):
+    def __deepcopy__(self, memo) -> "ZOffsetDecorator":
         copied_decorator = ZOffsetDecorator()
         copied_decorator.setZOffset(self.getZOffset())
         return copied_decorator

cura/Settings/ContainerManager.py

@@ -4,12 +4,12 @@
 import os
 import urllib.parse
 import uuid
-from typing import Any
+from typing import Dict, Union, Any, TYPE_CHECKING, List
-from typing import Dict, Union, Optional
 
-from PyQt5.QtCore import QObject, QUrl, QVariant
+from PyQt5.QtCore import QObject, QUrl
 from PyQt5.QtWidgets import QMessageBox
 
+
 from UM.i18n import i18nCatalog
 from UM.FlameProfiler import pyqtSlot
 from UM.Logger import Logger
@@ -21,6 +21,18 @@ from UM.Settings.ContainerStack import ContainerStack
 from UM.Settings.DefinitionContainer import DefinitionContainer
 from UM.Settings.InstanceContainer import InstanceContainer
 
+
+if TYPE_CHECKING:
+    from cura.CuraApplication import CuraApplication
+    from cura.Machines.ContainerNode import ContainerNode
+    from cura.Machines.MaterialNode import MaterialNode
+    from cura.Machines.QualityChangesGroup import QualityChangesGroup
+    from UM.PluginRegistry import PluginRegistry
+    from UM.Settings.ContainerRegistry import ContainerRegistry
+    from cura.Settings.MachineManager import MachineManager
+    from cura.Machines.MaterialManager import MaterialManager
+    from cura.Machines.QualityManager import QualityManager
+
 catalog = i18nCatalog("cura")
 
 
@@ -31,20 +43,20 @@ catalog = i18nCatalog("cura")
 #   when a certain action happens. This can be done through this class.
 class ContainerManager(QObject):
 
-    def __init__(self, application):
+    def __init__(self, application: "CuraApplication") -> None:
         if ContainerManager.__instance is not None:
             raise RuntimeError("Try to create singleton '%s' more than once" % self.__class__.__name__)
         ContainerManager.__instance = self
 
         super().__init__(parent = application)
 
-        self._application = application
+        self._application = application # type: CuraApplication
-        self._plugin_registry = self._application.getPluginRegistry()
+        self._plugin_registry = self._application.getPluginRegistry()  # type: PluginRegistry
-        self._container_registry = self._application.getContainerRegistry()
+        self._container_registry = self._application.getContainerRegistry()  # type: ContainerRegistry
-        self._machine_manager = self._application.getMachineManager()
+        self._machine_manager = self._application.getMachineManager()  # type: MachineManager
-        self._material_manager = self._application.getMaterialManager()
+        self._material_manager = self._application.getMaterialManager()  # type: MaterialManager
-        self._quality_manager = self._application.getQualityManager()
+        self._quality_manager = self._application.getQualityManager()  # type: QualityManager
-        self._container_name_filters = {}   # type: Dict[str, Dict[str, Any]]
+        self._container_name_filters = {}  # type: Dict[str, Dict[str, Any]]
 
     @pyqtSlot(str, str, result=str)
     def getContainerMetaDataEntry(self, container_id: str, entry_names: str) -> str:
@@ -69,21 +81,23 @@ class ContainerManager(QObject):
     #   by using "/" as a separator. For example, to change an entry "foo" in a
     #   dictionary entry "bar", you can specify "bar/foo" as entry name.
     #
-    #   \param container_id \type{str} The ID of the container to change.
+    #   \param container_node \type{ContainerNode}
     #   \param entry_name \type{str} The name of the metadata entry to change.
     #   \param entry_value The new value of the entry.
     #
-    #   \return True if successful, False if not.
     #  TODO: This is ONLY used by MaterialView for material containers. Maybe refactor this.
     #  Update: In order for QML to use objects and sub objects, those (sub) objects must all be QObject. Is that what we want?
     @pyqtSlot("QVariant", str, str)
-    def setContainerMetaDataEntry(self, container_node, entry_name, entry_value):
+    def setContainerMetaDataEntry(self, container_node: "ContainerNode", entry_name: str, entry_value: str) -> bool:
-        root_material_id = container_node.metadata["base_file"]
+        root_material_id = container_node.getMetaDataEntry("base_file", "")
         if self._container_registry.isReadOnly(root_material_id):
             Logger.log("w", "Cannot set metadata of read-only container %s.", root_material_id)
             return False
 
         material_group = self._material_manager.getMaterialGroup(root_material_id)
+        if material_group is None:
+            Logger.log("w", "Unable to find material group for: %s.", root_material_id)
+            return False
 
         entries = entry_name.split("/")
         entry_name = entries.pop()
@@ -91,11 +105,11 @@ class ContainerManager(QObject):
         sub_item_changed = False
         if entries:
             root_name = entries.pop(0)
-            root = material_group.root_material_node.metadata.get(root_name)
+            root = material_group.root_material_node.getMetaDataEntry(root_name)
 
             item = root
             for _ in range(len(entries)):
-                item = item.get(entries.pop(0), { })
+                item = item.get(entries.pop(0), {})
 
             if item[entry_name] != entry_value:
                 sub_item_changed = True
@@ -109,9 +123,10 @@ class ContainerManager(QObject):
             container.setMetaDataEntry(entry_name, entry_value)
             if sub_item_changed: #If it was only a sub-item that has changed then the setMetaDataEntry won't correctly notice that something changed, and we must manually signal that the metadata changed.
                 container.metaDataChanged.emit(container)
+        return True
 
     @pyqtSlot(str, result = str)
-    def makeUniqueName(self, original_name):
+    def makeUniqueName(self, original_name: str) -> str:
         return self._container_registry.uniqueName(original_name)
 
     ##  Get a list of string that can be used as name filters for a Qt File Dialog
@@ -125,7 +140,7 @@ class ContainerManager(QObject):
     #
     #   \return A string list with name filters.
     @pyqtSlot(str, result = "QStringList")
-    def getContainerNameFilters(self, type_name):
+    def getContainerNameFilters(self, type_name: str) -> List[str]:
         if not self._container_name_filters:
             self._updateContainerNameFilters()
 
@@ -257,7 +272,7 @@ class ContainerManager(QObject):
     #
     #   \return \type{bool} True if successful, False if not.
     @pyqtSlot(result = bool)
-    def updateQualityChanges(self):
+    def updateQualityChanges(self) -> bool:
         global_stack = self._machine_manager.activeMachine
         if not global_stack:
             return False
@@ -313,10 +328,10 @@ class ContainerManager(QObject):
     #   \param material_id \type{str} the id of the material for which to get the linked materials.
     #   \return \type{list} a list of names of materials with the same GUID
     @pyqtSlot("QVariant", bool, result = "QStringList")
-    def getLinkedMaterials(self, material_node, exclude_self = False):
+    def getLinkedMaterials(self, material_node: "MaterialNode", exclude_self: bool = False):
-        guid = material_node.metadata["GUID"]
+        guid = material_node.getMetaDataEntry("GUID", "")
 
-        self_root_material_id = material_node.metadata["base_file"]
+        self_root_material_id = material_node.getMetaDataEntry("base_file")
         material_group_list = self._material_manager.getMaterialGroupListByGUID(guid)
 
         linked_material_names = []
@@ -324,15 +339,19 @@ class ContainerManager(QObject):
             for material_group in material_group_list:
                 if exclude_self and material_group.name == self_root_material_id:
                     continue
-                linked_material_names.append(material_group.root_material_node.metadata["name"])
+                linked_material_names.append(material_group.root_material_node.getMetaDataEntry("name", ""))
         return linked_material_names
 
     ##  Unlink a material from all other materials by creating a new GUID
     #   \param material_id \type{str} the id of the material to create a new GUID for.
     @pyqtSlot("QVariant")
-    def unlinkMaterial(self, material_node):
+    def unlinkMaterial(self, material_node: "MaterialNode") -> None:
         # Get the material group
-        material_group = self._material_manager.getMaterialGroup(material_node.metadata["base_file"])
+        material_group = self._material_manager.getMaterialGroup(material_node.getMetaDataEntry("base_file", ""))
+
+        if material_group is None:
+            Logger.log("w", "Unable to find material group for %s", material_node)
+            return
 
         # Generate a new GUID
         new_guid = str(uuid.uuid4())
@@ -344,7 +363,7 @@ class ContainerManager(QObject):
         if container is not None:
             container.setMetaDataEntry("GUID", new_guid)
 
-    def _performMerge(self, merge_into, merge, clear_settings = True):
+    def _performMerge(self, merge_into: InstanceContainer, merge: InstanceContainer, clear_settings: bool = True) -> None:
         if merge == merge_into:
             return
 
@@ -400,7 +419,7 @@ class ContainerManager(QObject):
 
     ##  Import single profile, file_url does not have to end with curaprofile
     @pyqtSlot(QUrl, result="QVariantMap")
-    def importProfile(self, file_url):
+    def importProfile(self, file_url: QUrl):
         if not file_url.isValid():
             return
         path = file_url.toLocalFile()
@@ -409,7 +428,7 @@ class ContainerManager(QObject):
         return self._container_registry.importProfile(path)
 
     @pyqtSlot(QObject, QUrl, str)
-    def exportQualityChangesGroup(self, quality_changes_group, file_url: QUrl, file_type: str):
+    def exportQualityChangesGroup(self, quality_changes_group: "QualityChangesGroup", file_url: QUrl, file_type: str) -> None:
         if not file_url.isValid():
             return
         path = file_url.toLocalFile()

cura/Settings/CuraContainerStack.py

@@ -291,7 +291,7 @@ class CuraContainerStack(ContainerStack):
 
     # Helper to make sure we emit a PyQt signal on container changes.
     def _onContainersChanged(self, container: Any) -> None:
-        self.pyqtContainersChanged.emit()
+        Application.getInstance().callLater(self.pyqtContainersChanged.emit)
 
     # Helper that can be overridden to get the "machine" definition, that is, the definition that defines the machine
     # and its properties rather than, for example, the extruder. Defaults to simply returning the definition property.

cura/Settings/CuraStackBuilder.py

@@ -15,6 +15,7 @@ from .ExtruderStack import ExtruderStack
 
 ##  Contains helper functions to create new machines.
 class CuraStackBuilder:
+
     ##  Create a new instance of a machine.
     #
     #   \param name The name of the new machine.
@@ -26,7 +27,6 @@ class CuraStackBuilder:
         from cura.CuraApplication import CuraApplication
         application = CuraApplication.getInstance()
         variant_manager = application.getVariantManager()
-        material_manager = application.getMaterialManager()
         quality_manager = application.getQualityManager()
         registry = application.getContainerRegistry()
 
@@ -46,16 +46,6 @@ class CuraStackBuilder:
         if not global_variant_container:
             global_variant_container = application.empty_variant_container
 
-        # get variant container for extruders
-        extruder_variant_container = application.empty_variant_container
-        extruder_variant_node = variant_manager.getDefaultVariantNode(machine_definition, VariantType.NOZZLE)
-        extruder_variant_name = None
-        if extruder_variant_node:
-            extruder_variant_container = extruder_variant_node.getContainer()
-            if not extruder_variant_container:
-                extruder_variant_container = application.empty_variant_container
-            extruder_variant_name = extruder_variant_container.getName()
-
         generated_name = registry.createUniqueName("machine", "", name, machine_definition.getName())
         # Make sure the new name does not collide with any definition or (quality) profile
         # createUniqueName() only looks at other stacks, but not at definitions or quality profiles
@@ -74,34 +64,8 @@ class CuraStackBuilder:
 
         # Create ExtruderStacks
         extruder_dict = machine_definition.getMetaDataEntry("machine_extruder_trains")
-
+        for position in extruder_dict:
-        for position, extruder_definition_id in extruder_dict.items():
+            cls.createExtruderStackWithDefaultSetup(new_global_stack, position)
-            # Sanity check: make sure that the positions in the extruder definitions are same as in the machine
-            # definition
-            extruder_definition = registry.findDefinitionContainers(id = extruder_definition_id)[0]
-            position_in_extruder_def = extruder_definition.getMetaDataEntry("position")
-            if position_in_extruder_def != position:
-                ConfigurationErrorMessage.getInstance().addFaultyContainers(extruder_definition_id)
-                return None #Don't return any container stack then, not the rest of the extruders either.
-
-            # get material container for extruders
-            material_container = application.empty_material_container
-            material_node = material_manager.getDefaultMaterial(new_global_stack, position, extruder_variant_name, extruder_definition = extruder_definition)
-            if material_node and material_node.getContainer():
-                material_container = material_node.getContainer()
-
-            new_extruder_id = registry.uniqueName(extruder_definition_id)
-            new_extruder = cls.createExtruderStack(
-                new_extruder_id,
-                extruder_definition = extruder_definition,
-                machine_definition_id = definition_id,
-                position = position,
-                variant_container = extruder_variant_container,
-                material_container = material_container,
-                quality_container = application.empty_quality_container
-            )
-            new_extruder.setNextStack(new_global_stack)
-            new_global_stack.addExtruder(new_extruder)
 
         for new_extruder in new_global_stack.extruders.values(): #Only register the extruders if we're sure that all of them are correct.
             registry.addContainer(new_extruder)
@@ -136,19 +100,73 @@ class CuraStackBuilder:
 
         return new_global_stack
 
+    ##  Create a default Extruder Stack
+    #
+    #   \param global_stack The global stack this extruder refers to.
+    #   \param extruder_position The position of the current extruder.
+    @classmethod
+    def createExtruderStackWithDefaultSetup(cls, global_stack: "GlobalStack", extruder_position: int) -> None:
+        from cura.CuraApplication import CuraApplication
+        application = CuraApplication.getInstance()
+        variant_manager = application.getVariantManager()
+        material_manager = application.getMaterialManager()
+        registry = application.getContainerRegistry()
+
+        # get variant container for extruders
+        extruder_variant_container = application.empty_variant_container
+        extruder_variant_node = variant_manager.getDefaultVariantNode(global_stack.definition, VariantType.NOZZLE)
+        extruder_variant_name = None
+        if extruder_variant_node:
+            extruder_variant_container = extruder_variant_node.getContainer()
+            if not extruder_variant_container:
+                extruder_variant_container = application.empty_variant_container
+            extruder_variant_name = extruder_variant_container.getName()
+
+        extruder_definition_dict = global_stack.getMetaDataEntry("machine_extruder_trains")
+        extruder_definition_id = extruder_definition_dict[str(extruder_position)]
+        extruder_definition = registry.findDefinitionContainers(id = extruder_definition_id)[0]
+
+        # get material container for extruders
+        material_container = application.empty_material_container
+        material_node = material_manager.getDefaultMaterial(global_stack, extruder_position, extruder_variant_name,
+                                                            extruder_definition = extruder_definition)
+        if material_node and material_node.getContainer():
+            material_container = material_node.getContainer()
+
+        new_extruder_id = registry.uniqueName(extruder_definition_id)
+        new_extruder = cls.createExtruderStack(
+            new_extruder_id,
+            extruder_definition = extruder_definition,
+            machine_definition_id = global_stack.definition.getId(),
+            position = extruder_position,
+            variant_container = extruder_variant_container,
+            material_container = material_container,
+            quality_container = application.empty_quality_container
+        )
+        new_extruder.setNextStack(global_stack)
+        global_stack.addExtruder(new_extruder)
+
+        registry.addContainer(new_extruder)
+
     ##  Create a new Extruder stack
     #
     #   \param new_stack_id The ID of the new stack.
-    #   \param definition The definition to base the new stack on.
+    #   \param extruder_definition The definition to base the new stack on.
-    #   \param machine_definition_id The ID of the machine definition to use for
+    #   \param machine_definition_id The ID of the machine definition to use for the user container.
-    #   the user container.
+    #   \param position The position the extruder occupies in the machine.
-    #   \param kwargs You can add keyword arguments to specify IDs of containers to use for a specific type, for example "variant": "0.4mm"
+    #   \param variant_container The variant selected for the current extruder.
+    #   \param material_container The material selected for the current extruder.
+    #   \param quality_container The quality selected for the current extruder.
     #
-    #   \return A new Global stack instance with the specified parameters.
+    #   \return A new Extruder stack instance with the specified parameters.
     @classmethod
-    def createExtruderStack(cls, new_stack_id: str, extruder_definition: DefinitionContainerInterface, machine_definition_id: str,
+    def createExtruderStack(cls, new_stack_id: str, extruder_definition: DefinitionContainerInterface,
+                            machine_definition_id: str,
                             position: int,
-                            variant_container, material_container, quality_container) -> ExtruderStack:
+                            variant_container: "InstanceContainer",
+                            material_container: "InstanceContainer",
+                            quality_container: "InstanceContainer") -> ExtruderStack:
+
         from cura.CuraApplication import CuraApplication
         application = CuraApplication.getInstance()
         registry = application.getContainerRegistry()
@@ -157,7 +175,7 @@ class CuraStackBuilder:
         stack.setName(extruder_definition.getName())
         stack.setDefinition(extruder_definition)
 
-        stack.setMetaDataEntry("position", position)
+        stack.setMetaDataEntry("position", str(position))
 
         user_container = cls.createUserChangesContainer(new_stack_id + "_user", machine_definition_id, new_stack_id,
                                                         is_global_stack = False)
@@ -183,9 +201,22 @@ class CuraStackBuilder:
     #   \param kwargs You can add keyword arguments to specify IDs of containers to use for a specific type, for example "variant": "0.4mm"
     #
     #   \return A new Global stack instance with the specified parameters.
+
+    ##  Create a new Global stack
+    #
+    #   \param new_stack_id The ID of the new stack.
+    #   \param definition The definition to base the new stack on.
+    #   \param variant_container The variant selected for the current stack.
+    #   \param material_container The material selected for the current stack.
+    #   \param quality_container The quality selected for the current stack.
+    #
+    #   \return A new Global stack instance with the specified parameters.
     @classmethod
     def createGlobalStack(cls, new_stack_id: str, definition: DefinitionContainerInterface,
-                          variant_container, material_container, quality_container) -> GlobalStack:
+                          variant_container: "InstanceContainer",
+                          material_container: "InstanceContainer",
+                          quality_container: "InstanceContainer") -> GlobalStack:
+
         from cura.CuraApplication import CuraApplication
         application = CuraApplication.getInstance()
         registry = application.getContainerRegistry()

cura/Settings/ExtruderManager.py

@@ -4,7 +4,8 @@
 from PyQt5.QtCore import pyqtSignal, pyqtProperty, QObject, QVariant  # For communicating data and events to Qt.
 from UM.FlameProfiler import pyqtSlot
 
-import cura.CuraApplication #To get the global container stack to find the current machine.
+import cura.CuraApplication # To get the global container stack to find the current machine.
+from cura.Settings.GlobalStack import GlobalStack
 from UM.Logger import Logger
 from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
 from UM.Scene.SceneNode import SceneNode
@@ -12,15 +13,13 @@ 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.SettingFunction import SettingFunction
-from UM.Settings.SettingInstance import SettingInstance
 from UM.Settings.ContainerStack import ContainerStack
 from UM.Settings.PropertyEvaluationContext import PropertyEvaluationContext
 
-from typing import Optional, List, TYPE_CHECKING, Union, Dict
+from typing import Any, cast, Dict, List, Optional, TYPE_CHECKING, Union
 
 if TYPE_CHECKING:
     from cura.Settings.ExtruderStack import ExtruderStack
-    from cura.Settings.GlobalStack import GlobalStack
 
 
 ##  Manages all existing extruder stacks.
@@ -38,9 +37,13 @@ class ExtruderManager(QObject):
 
         self._application = cura.CuraApplication.CuraApplication.getInstance()
 
-        self._extruder_trains = {}  # Per machine, a dictionary of extruder container stack IDs. Only for separately defined extruders.
+        # Per machine, a dictionary of extruder container stack IDs. Only for separately defined extruders.
+        self._extruder_trains = {}  # type: Dict[str, Dict[str, "ExtruderStack"]]
         self._active_extruder_index = -1  # Indicates the index of the active extruder stack. -1 means no active extruder stack
-        self._selected_object_extruders = []
+
+        # TODO; I have no idea why this is a union of ID's and extruder stacks. This needs to be fixed at some point.
+        self._selected_object_extruders = []  # type: List[Union[str, "ExtruderStack"]]
+
         self._addCurrentMachineExtruders()
 
         Selection.selectionChanged.connect(self.resetSelectedObjectExtruders)
@@ -68,7 +71,7 @@ class ExtruderManager(QObject):
 
     ##  Return extruder count according to extruder trains.
     @pyqtProperty(int, notify = extrudersChanged)
-    def extruderCount(self):
+    def extruderCount(self) -> int:
         if not self._application.getGlobalContainerStack():
             return 0  # No active machine, so no extruders.
         try:
@@ -79,28 +82,14 @@ class ExtruderManager(QObject):
     ##  Gets a dict with the extruder stack ids with the extruder number as the key.
     @pyqtProperty("QVariantMap", notify = extrudersChanged)
     def extruderIds(self) -> Dict[str, str]:
-        extruder_stack_ids = {}
+        extruder_stack_ids = {}  # type: Dict[str, str]
 
         global_container_stack = self._application.getGlobalContainerStack()
         if global_container_stack:
-            global_stack_id = global_container_stack.getId()
+            extruder_stack_ids = {position: extruder.id for position, extruder in global_container_stack.extruders.items()}
-
-            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, extruder_stack_id: str) -> str:
-        global_container_stack = self._application.getGlobalContainerStack()
-        if global_container_stack is not None:
-            for position in self._extruder_trains[global_container_stack.getId()]:
-                extruder = self._extruder_trains[global_container_stack.getId()][position]
-                if extruder.getId() == extruder_stack_id:
-                    return extruder.qualityChanges.getId()
-        return ""
-
     ##  Changes the active extruder by index.
     #
     #   \param index The index of the new active extruder.
@@ -117,9 +106,9 @@ class ExtruderManager(QObject):
     #
     #   \param index The index of the extruder whose name to get.
     @pyqtSlot(int, result = str)
-    def getExtruderName(self, index):
+    def getExtruderName(self, index: int) -> str:
         try:
-            return list(self.getActiveExtruderStacks())[index].getName()
+            return self.getActiveExtruderStacks()[index].getName()
         except IndexError:
             return ""
 
@@ -128,12 +117,12 @@ class ExtruderManager(QObject):
 
     ##  Provides a list of extruder IDs used by the current selected objects.
     @pyqtProperty("QVariantList", notify = selectedObjectExtrudersChanged)
-    def selectedObjectExtruders(self) -> List[str]:
+    def selectedObjectExtruders(self) -> List[Union[str, "ExtruderStack"]]:
         if not self._selected_object_extruders:
             object_extruders = set()
 
             # First, build a list of the actual selected objects (including children of groups, excluding group nodes)
-            selected_nodes = []
+            selected_nodes = []  # type: List["SceneNode"]
             for node in Selection.getAllSelectedObjects():
                 if node.callDecoration("isGroup"):
                     for grouped_node in BreadthFirstIterator(node): #type: ignore #Ignore type error because iter() should get called automatically by Python syntax.
@@ -145,16 +134,15 @@ class ExtruderManager(QObject):
                     selected_nodes.append(node)
 
             # Then, figure out which nodes are used by those selected nodes.
-            global_stack = self._application.getGlobalContainerStack()
+            current_extruder_trains = self.getActiveExtruderStacks()
-            current_extruder_trains = self._extruder_trains.get(global_stack.getId())
             for node in selected_nodes:
                 extruder = node.callDecoration("getActiveExtruder")
                 if extruder:
                     object_extruders.add(extruder)
                 elif current_extruder_trains:
-                    object_extruders.add(current_extruder_trains["0"].getId())
+                    object_extruders.add(current_extruder_trains[0].getId())
 
-            self._selected_object_extruders = list(object_extruders)
+            self._selected_object_extruders = list(object_extruders)  # type: List[Union[str, "ExtruderStack"]]
 
         return self._selected_object_extruders
 
@@ -163,19 +151,12 @@ class ExtruderManager(QObject):
     #   This will trigger a recalculation of the extruders used for the
     #   selection.
     def resetSelectedObjectExtruders(self) -> None:
-        self._selected_object_extruders = []
+        self._selected_object_extruders = []  # type: List[Union[str, "ExtruderStack"]]
         self.selectedObjectExtrudersChanged.emit()
 
     @pyqtSlot(result = QObject)
     def getActiveExtruderStack(self) -> Optional["ExtruderStack"]:
-        global_container_stack = self._application.getGlobalContainerStack()
+        return self.getExtruderStack(self._active_extruder_index)
-
-        if global_container_stack:
-            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
     def getExtruderStack(self, index) -> Optional["ExtruderStack"]:
@@ -186,16 +167,7 @@ class ExtruderManager(QObject):
                     return self._extruder_trains[global_container_stack.getId()][str(index)]
         return None
 
-    ##  Get all extruder stacks
+    def registerExtruder(self, extruder_train: "ExtruderStack", machine_id: str) -> None:
-    def getExtruderStacks(self) -> List["ExtruderStack"]:
-        result = []
-        for i in range(self.extruderCount):
-            stack = self.getExtruderStack(i)
-            if stack:
-                result.append(stack)
-        return result
-
-    def registerExtruder(self, extruder_train, machine_id):
         changed = False
 
         if machine_id not in self._extruder_trains:
@@ -214,23 +186,20 @@ class ExtruderManager(QObject):
         if changed:
             self.extrudersChanged.emit(machine_id)
 
-    def getAllExtruderValues(self, setting_key):
-        return self.getAllExtruderSettings(setting_key, "value")
-
     ##  Gets a property of a setting for all extruders.
     #
     #   \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: str, prop: str):
+    def getAllExtruderSettings(self, setting_key: str, prop: str) -> List:
         result = []
-        for index in self.extruderIds:
+
-            extruder_stack_id = self.extruderIds[str(index)]
+        for extruder_stack in self.getActiveExtruderStacks():
-            extruder_stack = ContainerRegistry.getInstance().findContainerStacks(id = extruder_stack_id)[0]
             result.append(extruder_stack.getProperty(setting_key, prop))
+
         return result
 
-    def extruderValueWithDefault(self, value):
+    def extruderValueWithDefault(self, value: str) -> str:
         machine_manager = self._application.getMachineManager()
         if value == "-1":
             return machine_manager.defaultExtruderPosition
@@ -321,7 +290,7 @@ class ExtruderManager(QObject):
     ##  Removes the container stack and user profile for the extruders for a specific machine.
     #
     #   \param machine_id The machine to remove the extruders for.
-    def removeMachineExtruders(self, machine_id: str):
+    def removeMachineExtruders(self, machine_id: str) -> None:
         for extruder in self.getMachineExtruders(machine_id):
             ContainerRegistry.getInstance().removeContainer(extruder.userChanges.getId())
             ContainerRegistry.getInstance().removeContainer(extruder.getId())
@@ -331,24 +300,11 @@ class ExtruderManager(QObject):
     ##  Returns extruders for a specific machine.
     #
     #   \param machine_id The machine to get the extruders of.
-    def getMachineExtruders(self, machine_id: str):
+    def getMachineExtruders(self, machine_id: str) -> List["ExtruderStack"]:
         if machine_id not in self._extruder_trains:
             return []
         return [self._extruder_trains[machine_id][name] for name in self._extruder_trains[machine_id]]
 
-    ##  Returns a list containing the global stack and active extruder stacks.
-    #
-    #   The first element is the global container stack, followed by any extruder stacks.
-    #   \return \type{List[ContainerStack]}
-    def getActiveGlobalAndExtruderStacks(self) -> Optional[List[Union["ExtruderStack", "GlobalStack"]]]:
-        global_stack = self._application.getGlobalContainerStack()
-        if not global_stack:
-            return None
-
-        result = [global_stack]
-        result.extend(self.getActiveExtruderStacks())
-        return result
-
     ##  Returns the list of active extruder stacks, taking into account the machine extruder count.
     #
     #   \return \type{List[ContainerStack]} a list of
@@ -357,14 +313,11 @@ class ExtruderManager(QObject):
         if not global_stack:
             return []
 
-        result = []
+        result_tuple_list = sorted(list(global_stack.extruders.items()), key = lambda x: int(x[0]))
-        if global_stack.getId() in self._extruder_trains:
+        result_list = [item[1] for item in result_tuple_list]
-            for extruder in sorted(self._extruder_trains[global_stack.getId()]):
-                result.append(self._extruder_trains[global_stack.getId()][extruder])
 
         machine_extruder_count = global_stack.getProperty("machine_extruder_count", "value")
-
+        return result_list[:machine_extruder_count]
-        return result[:machine_extruder_count]
 
     def _globalContainerStackChanged(self) -> None:
         # If the global container changed, the machine changed and might have extruders that were not registered yet
@@ -406,10 +359,17 @@ class ExtruderManager(QObject):
 
     # After 3.4, all single-extrusion machines have their own extruder definition files instead of reusing
     # "fdmextruder". We need to check a machine here so its extruder definition is correct according to this.
-    def _fixSingleExtrusionMachineExtruderDefinition(self, global_stack):
+    def _fixSingleExtrusionMachineExtruderDefinition(self, global_stack: "GlobalStack") -> None:
         expected_extruder_definition_0_id = global_stack.getMetaDataEntry("machine_extruder_trains")["0"]
-        extruder_stack_0 = global_stack.extruders["0"]
+        extruder_stack_0 = global_stack.extruders.get("0")
-        if extruder_stack_0.definition.getId() != expected_extruder_definition_0_id:
+
+        if extruder_stack_0 is None:
+            Logger.log("i", "No extruder stack for global stack [%s], create one", global_stack.getId())
+            # Single extrusion machine without an ExtruderStack, create it
+            from cura.Settings.CuraStackBuilder import CuraStackBuilder
+            CuraStackBuilder.createExtruderStackWithDefaultSetup(global_stack, 0)
+
+        elif extruder_stack_0.definition.getId() != expected_extruder_definition_0_id:
             Logger.log("e", "Single extruder printer [{printer}] expected extruder [{expected}], but got [{got}]. I'm making it [{expected}].".format(
                 printer = global_stack.getId(), expected = expected_extruder_definition_0_id, got = extruder_stack_0.definition.getId()))
             container_registry = ContainerRegistry.getInstance()
@@ -425,11 +385,11 @@ class ExtruderManager(QObject):
     #   \return A list of values for all extruders. If an extruder does not have a value, it will not be in the list.
     #           If no extruder has the value, the list will contain the global value.
     @staticmethod
-    def getExtruderValues(key):
+    def getExtruderValues(key: str) -> List[Any]:
-        global_stack = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()
+        global_stack = cast(GlobalStack, cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()) #We know that there must be a global stack by the time you're requesting setting values.
 
         result = []
-        for extruder in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
+        for extruder in ExtruderManager.getInstance().getActiveExtruderStacks():
             if not extruder.isEnabled:
                 continue
             # only include values from extruders that are "active" for the current machine instance
@@ -460,8 +420,8 @@ class ExtruderManager(QObject):
     #   \return A list of values for all extruders. If an extruder does not have a value, it will not be in the list.
     #           If no extruder has the value, the list will contain the global value.
     @staticmethod
-    def getDefaultExtruderValues(key):
+    def getDefaultExtruderValues(key: str) -> List[Any]:
-        global_stack = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()
+        global_stack = cast(GlobalStack, cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()) #We know that there must be a global stack by the time you're requesting setting values.
         context = PropertyEvaluationContext(global_stack)
         context.context["evaluate_from_container_index"] = 1  # skip the user settings container
         context.context["override_operators"] = {
@@ -471,7 +431,7 @@ class ExtruderManager(QObject):
         }
 
         result = []
-        for extruder in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
+        for extruder in ExtruderManager.getInstance().getActiveExtruderStacks():
             # only include values from extruders that are "active" for the current machine instance
             if int(extruder.getMetaDataEntry("position")) >= global_stack.getProperty("machine_extruder_count", "value", context = context):
                 continue
@@ -504,7 +464,7 @@ class ExtruderManager(QObject):
     #
     #   \return String representing the extruder values
     @pyqtSlot(str, result="QVariant")
-    def getInstanceExtruderValues(self, key):
+    def getInstanceExtruderValues(self, key) -> List:
         return ExtruderManager.getExtruderValues(key)
 
     ##  Get the value for a setting from a specific extruder.
@@ -517,7 +477,7 @@ class ExtruderManager(QObject):
     #   \return The value of the setting for the specified extruder or for the
     #   global stack if not found.
     @staticmethod
-    def getExtruderValue(extruder_index, key):
+    def getExtruderValue(extruder_index: int, key: str) -> Any:
         if extruder_index == -1:
             extruder_index = int(cura.CuraApplication.CuraApplication.getInstance().getMachineManager().defaultExtruderPosition)
         extruder = ExtruderManager.getInstance().getExtruderStack(extruder_index)
@@ -528,7 +488,7 @@ class ExtruderManager(QObject):
                 value = value(extruder)
         else:
             # Just a value from global.
-            value = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack().getProperty(key, "value")
+            value = cast(GlobalStack, cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()).getProperty(key, "value")
 
         return value
 
@@ -542,7 +502,7 @@ class ExtruderManager(QObject):
     #   \return The value of the setting for the specified extruder or for the
     #   global stack if not found.
     @staticmethod
-    def getDefaultExtruderValue(extruder_index, key):
+    def getDefaultExtruderValue(extruder_index: int, key: str) -> Any:
         extruder = ExtruderManager.getInstance().getExtruderStack(extruder_index)
         context = PropertyEvaluationContext(extruder)
         context.context["evaluate_from_container_index"] = 1  # skip the user settings container
@@ -557,7 +517,7 @@ class ExtruderManager(QObject):
             if isinstance(value, SettingFunction):
                 value = value(extruder, context = context)
         else:  # Just a value from global.
-            value = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack().getProperty(key, "value", context = context)
+            value = cast(GlobalStack, cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()).getProperty(key, "value", context = context)
 
         return value
 
@@ -569,8 +529,8 @@ class ExtruderManager(QObject):
     #
     #   \return The effective value
     @staticmethod
-    def getResolveOrValue(key):
+    def getResolveOrValue(key: str) -> Any:
-        global_stack = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()
+        global_stack = cast(GlobalStack, cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack())
         resolved_value = global_stack.getProperty(key, "value")
 
         return resolved_value
@@ -583,8 +543,8 @@ class ExtruderManager(QObject):
     #
     #   \return The effective value
     @staticmethod
-    def getDefaultResolveOrValue(key):
+    def getDefaultResolveOrValue(key: str) -> Any:
-        global_stack = cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack()
+        global_stack = cast(GlobalStack, cura.CuraApplication.CuraApplication.getInstance().getGlobalContainerStack())
         context = PropertyEvaluationContext(global_stack)
         context.context["evaluate_from_container_index"] = 1  # skip the user settings container
         context.context["override_operators"] = {

cura/Settings/ExtrudersModel.py

@@ -134,7 +134,7 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
         # Link to new extruders
         self._active_machine_extruders = []
         extruder_manager = Application.getInstance().getExtruderManager()
-        for extruder in extruder_manager.getExtruderStacks():
+        for extruder in extruder_manager.getActiveExtruderStacks():
             if extruder is None: #This extruder wasn't loaded yet. This happens asynchronously while this model is constructed from QML.
                 continue
             extruder.containersChanged.connect(self._onExtruderStackContainersChanged)
@@ -171,7 +171,7 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
             # get machine extruder count for verification
             machine_extruder_count = global_container_stack.getProperty("machine_extruder_count", "value")
 
-            for extruder in Application.getInstance().getExtruderManager().getMachineExtruders(global_container_stack.getId()):
+            for extruder in Application.getInstance().getExtruderManager().getActiveExtruderStacks():
                 position = extruder.getMetaDataEntry("position", default = "0")  # Get the position
                 try:
                     position = int(position)

cura/Settings/GlobalStack.py

@@ -13,6 +13,8 @@ from UM.Settings.SettingInstance import InstanceState
 from UM.Settings.ContainerRegistry import ContainerRegistry
 from UM.Settings.Interfaces import PropertyEvaluationContext
 from UM.Logger import Logger
+from UM.Util import parseBool
+
 import cura.CuraApplication
 
 from . import Exceptions
@@ -21,6 +23,7 @@ from .CuraContainerStack import CuraContainerStack
 if TYPE_CHECKING:
     from cura.Settings.ExtruderStack import ExtruderStack
 
+
 ##  Represents the Global or Machine stack and its related containers.
 #
 class GlobalStack(CuraContainerStack):
@@ -61,6 +64,10 @@ class GlobalStack(CuraContainerStack):
             name = self.variant.getName()
         return name
 
+    @pyqtProperty(str, constant = True)
+    def preferred_output_file_formats(self) -> str:
+        return self.getMetaDataEntry("file_formats")
+
     ##  Add an extruder to the list of extruders of this stack.
     #
     #   \param extruder The extruder to add.
@@ -184,6 +191,15 @@ class GlobalStack(CuraContainerStack):
     def getHeadAndFansCoordinates(self):
         return self.getProperty("machine_head_with_fans_polygon", "value")
 
+    def getHasMaterials(self) -> bool:
+        return parseBool(self.getMetaDataEntry("has_materials", False))
+
+    def getHasVariants(self) -> bool:
+        return parseBool(self.getMetaDataEntry("has_variants", False))
+
+    def getHasMachineQuality(self) -> bool:
+        return parseBool(self.getMetaDataEntry("has_machine_quality", False))
+
 
 ## private:
 global_stack_mime = MimeType(

cura/Settings/MachineManager.py

@@ -369,6 +369,7 @@ class MachineManager(QObject):
             return
 
         global_stack = containers[0]
+        ExtruderManager.getInstance()._fixSingleExtrusionMachineExtruderDefinition(global_stack)
         if not global_stack.isValid():
             # Mark global stack as invalid
             ConfigurationErrorMessage.getInstance().addFaultyContainers(global_stack.getId())
@@ -377,7 +378,7 @@ class MachineManager(QObject):
         self._global_container_stack = global_stack
         self._application.setGlobalContainerStack(global_stack)
         ExtruderManager.getInstance()._globalContainerStackChanged()
-        self._initMachineState(containers[0])
+        self._initMachineState(global_stack)
         self._onGlobalContainerChanged()
 
         self.__emitChangedSignals()
@@ -387,7 +388,9 @@ class MachineManager(QObject):
     #   \param definition_id \type{str} definition id that needs to look for
     #   \param metadata_filter \type{dict} list of metadata keys and values used for filtering
     @staticmethod
-    def getMachine(definition_id: str, metadata_filter: Dict[str, str] = None) -> Optional["GlobalStack"]:
+    def getMachine(definition_id: str, metadata_filter: Optional[Dict[str, str]] = None) -> Optional["GlobalStack"]:
+        if metadata_filter is None:
+            metadata_filter = {}
         machines = CuraContainerRegistry.getInstance().findContainerStacks(type = "machine", **metadata_filter)
         for machine in machines:
             if machine.definition.getId() == definition_id:
@@ -414,7 +417,7 @@ class MachineManager(QObject):
 
         # Not a very pretty solution, but the extruder manager doesn't really know how many extruders there are
         machine_extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
-        extruder_stacks = ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())
+        extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
         count = 1  # we start with the global stack
         for stack in extruder_stacks:
             md = stack.getMetaData()
@@ -437,7 +440,7 @@ class MachineManager(QObject):
         if self._global_container_stack.getTop().findInstances():
             return True
 
-        stacks = list(ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId()))
+        stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
         for stack in stacks:
             if stack.getTop().findInstances():
                 return True
@@ -450,7 +453,7 @@ class MachineManager(QObject):
             return 0
         num_user_settings = 0
         num_user_settings += len(self._global_container_stack.getTop().findInstances())
-        stacks = list(ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId()))
+        stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
         for stack in stacks:
             num_user_settings += len(stack.getTop().findInstances())
         return num_user_settings
@@ -475,7 +478,7 @@ class MachineManager(QObject):
             stack = ExtruderManager.getInstance().getActiveExtruderStack()
             stacks = [stack]
         else:
-            stacks = ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())
+            stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
 
         for stack in stacks:
             if stack is not None:
@@ -640,7 +643,7 @@ class MachineManager(QObject):
         if self._active_container_stack is None or self._global_container_stack is None:
             return
         new_value = self._active_container_stack.getProperty(key, "value")
-        extruder_stacks = [stack for stack in ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())]
+        extruder_stacks = [stack for stack in ExtruderManager.getInstance().getActiveExtruderStacks()]
 
         # check in which stack the value has to be replaced
         for extruder_stack in extruder_stacks:
@@ -892,7 +895,11 @@ class MachineManager(QObject):
                 extruder_nr = node.callDecoration("getActiveExtruderPosition")
 
                 if extruder_nr is not None and int(extruder_nr) > extruder_count - 1:
-                    node.callDecoration("setActiveExtruder", extruder_manager.getExtruderStack(extruder_count - 1).getId())
+                    extruder = extruder_manager.getExtruderStack(extruder_count - 1)
+                    if extruder is not None:
+                        node.callDecoration("setActiveExtruder", extruder.getId())
+                    else:
+                        Logger.log("w", "Could not find extruder to set active.")
 
         # Make sure one of the extruder stacks is active
         extruder_manager.setActiveExtruderIndex(0)

cura/Settings/MachineNameValidator.py

@@ -35,10 +35,9 @@ class MachineNameValidator(QObject):
     ##  Check if a specified machine name is allowed.
     #
     #   \param name The machine name to check.
-    #   \param position The current position of the cursor in the text box.
     #   \return ``QValidator.Invalid`` if it's disallowed, or
     #   ``QValidator.Acceptable`` if it's allowed.
-    def validate(self, name, position):
+    def validate(self, name):
         #Check for file name length of the current settings container (which is the longest file we're saving with the name).
         try:
             filename_max_length = os.statvfs(Resources.getDataStoragePath()).f_namemax
@@ -54,7 +53,7 @@ class MachineNameValidator(QObject):
     ##  Updates the validation state of a machine name text field.
     @pyqtSlot(str)
     def updateValidation(self, new_name):
-        is_valid = self.validate(new_name, 0)
+        is_valid = self.validate(new_name)
         if is_valid == QValidator.Acceptable:
             self.validation_regex = "^.*$" #Matches anything.
         else:

cura/Settings/SidebarCustomMenuItemsModel.py

@@ -18,7 +18,7 @@ class SidebarCustomMenuItemsModel(ListModel):
         self.addRoleName(self.name_role, "name")
         self.addRoleName(self.actions_role, "actions")
         self.addRoleName(self.menu_item_role, "menu_item")
-        self.addRoleName(self.menu_item_icon_name_role, "iconName")
+        self.addRoleName(self.menu_item_icon_name_role, "icon_name")
         self._updateExtensionList()
 
     def _updateExtensionList(self)-> None:

cura/Settings/UserChangesModel.py

@@ -43,7 +43,9 @@ class UserChangesModel(ListModel):
         global_stack = Application.getInstance().getGlobalContainerStack()
         if not global_stack:
             return
-        stacks = ExtruderManager.getInstance().getActiveGlobalAndExtruderStacks()
+
+        stacks = [global_stack]
+        stacks.extend(global_stack.extruders.values())
 
         # Check if the definition container has a translation file and ensure it's loaded.
         definition = global_stack.getBottom()

plugins/3MFReader/ThreeMFReader.py

@@ -225,7 +225,7 @@ class ThreeMFReader(MeshReader):
 
         except Exception:
             Logger.logException("e", "An exception occurred in 3mf reader.")
-            return []
+            return None
 
         return result
 

plugins/3MFReader/ThreeMFWorkspaceReader.py

@@ -85,14 +85,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
     def __init__(self) -> None:
         super().__init__()
 
-        MimeTypeDatabase.addMimeType(
-            MimeType(
-                name="application/x-curaproject+xml",
-                comment="Cura Project File",
-                suffixes=["curaproject.3mf"]
-            )
-        )
-
         self._supported_extensions = [".3mf"]
         self._dialog = WorkspaceDialog()
         self._3mf_mesh_reader = None
@@ -726,8 +718,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             nodes = []
 
         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")]
         self.setWorkspaceName(base_file_name)
         return nodes
 
@@ -944,7 +934,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                                                              root_material_id)
 
             if material_node is not None and material_node.getContainer() is not None:
-                extruder_stack.material = material_node.getContainer()
+                extruder_stack.material = material_node.getContainer()  # type: InstanceContainer
 
     def _applyChangesToMachine(self, global_stack, extruder_stack_dict):
         # Clear all first

plugins/3MFReader/__init__.py

@@ -18,11 +18,7 @@ catalog = i18nCatalog("cura")
 
 
 def getMetaData() -> Dict:
-    # Workaround for osx not supporting double file extensions correctly.
+    workspace_extension = "3mf"
-    if Platform.isOSX():
-        workspace_extension = "3mf"
-    else:
-        workspace_extension = "curaproject.3mf"
 
     metaData = {}
     if "3MFReader.ThreeMFReader" in sys.modules:

plugins/3MFReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides support for reading 3MF files.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/3MFWriter/__init__.py

@@ -15,11 +15,7 @@ from UM.Platform import Platform
 i18n_catalog = i18nCatalog("uranium")
 
 def getMetaData():
-    # Workarround for osx not supporting double file extensions correctly.
+    workspace_extension = "3mf"
-    if Platform.isOSX():
-        workspace_extension = "3mf"
-    else:
-        workspace_extension = "curaproject.3mf"
 
     metaData = {}
 
@@ -36,7 +32,7 @@ def getMetaData():
             "output": [{
                 "extension": workspace_extension,
                 "description": i18n_catalog.i18nc("@item:inlistbox", "Cura Project 3MF file"),
-                "mime_type": "application/x-curaproject+xml",
+                "mime_type": "application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
                 "mode": ThreeMFWorkspaceWriter.ThreeMFWorkspaceWriter.OutputMode.BinaryMode
             }]
         }

plugins/3MFWriter/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides support for writing 3MF files.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/ChangeLogPlugin/ChangeLog.txt

@@ -1,3 +1,103 @@
+[3.5.0]
+*Monitor page
+The monitor page of Ultimaker Cura has been remodeled for better consistency with the Cura Connect ‘Print jobs’ interface. This means less switching between interfaces, and more control from within Ultimaker Cura.
+
+*Open recent projects
+Project files can now be found in the ‘Open Recent’ menu.
+
+*New tool hotkeys
+New hotkeys have been assigned for quick toggling between the translate (T), scale (S), rotate (R) and mirror (M) tools.
+
+*Project files use 3MF only
+A 3MF extension is now used for project files. The ‘.curaproject’ extension is no longer used.
+
+*Camera maximum zoom
+The maximum zoom has been adjusted to scale with the size of the selected printer. This fixes third-party printers with huge build volumes to be correctly visible.
+
+*Corrected width of layer number box
+The layer number indicator in the layer view now displays numbers above 999 correctly.
+
+*Materials preferences
+This screen has been redesigned to improve user experience. Materials can now be set as a favorites, so they can be easily accessed in the material selection panel at the top-right of the screen.
+
+*Installed packages checkmark
+Packages that are already installed in the Toolbox are now have a checkmark for easy reference.
+
+*Mac OSX save dialog
+The save dialog has been restored to its native behavior and bugs have been fixed.
+
+*Removed .gz extension
+Saving compressed g-code files from the save dialog has been removed because of incompatibility with MacOS. If sending jobs over Wi-Fi, g-code is still compressed.
+
+*Updates to Chinese translations
+Improved and updated Chinese translations. Contributed by MarmaladeForMeat.
+
+*Save project
+Saving the project no longer triggers the project to reslice.
+
+*File menu
+The Save option in the file menu now saves project files. The export option now saves other types of files, such as STL.
+
+*Improved processing of overhang walls
+Overhang walls are detected and printed with different speeds. It will not start a perimeter on an overhanging wall. The quality of overhanging walls may be improved by printing those at a different speed. Contributed by smartavionics.
+
+*Prime tower reliability
+The prime tower has been improved for better reliability. This is especially useful when printing with two materials that do not adhere well.
+
+*Support infill line direction
+The support infill lines can now be rotated to increase the supporting capabilities and reduce artifacts on the model. This setting rotates existing patterns, like triangle support infill. Contributed by fieldOfView.
+
+*Minimum polygon circumference
+Polygons in sliced layers that have a circumference smaller than the setting value will be filtered out. Lower values lead to higher resolution meshes at the cost of increased slicing time. This setting is ideal for very tiny prints with a lot of detail, or for SLA printers. Contributed by cubiq.
+
+*Initial layer support line distance
+This setting enables the user to reduce or increase the density of the support initial layer in order to increase or reduce adhesion to the build plate and the overall strength.
+
+*Extra infill wall line count
+Adds extra walls around infill. Contributed by BagelOrb.
+
+*Multiply infill
+Creates multiple infill lines on the same pattern for sturdier infill. Contributed by BagelOrb.
+
+*Connected infill polygons
+Connecting infill lines now also works with concentric and cross infill patterns. The benefit would be stronger infill and more consistent material flow/saving retractions. Contributed by BagelOrb.
+
+*Fan speed override
+New setting to modify the fan speed of supported areas. This setting can be found in Support settings > Fan Speed Override when support is enabled. Contributed by smartavionics.
+
+*Minimum wall flow
+New setting to define a minimum flow for thin printed walls. Contributed by smartavionics.
+
+*Custom support plugin
+A tool downloadable from the toolbox, similar to the support blocker, that adds cubes of support to the model manually by clicking parts of it. Contributed by Lokster.
+
+*Quickly toggle autoslicing
+Adds a pause/play button to the progress bar to quickly toggle autoslicing. Contributed by fieldOfview.
+
+*Cura-DuetRRFPlugin
+Adds output devices for a Duet RepRapFirmware printer: "Print", "Simulate", and "Upload". Contributed by Kriechi.
+
+*Dremel 3D20
+This plugin adds the Dremel printer to Ultimaker Cura. Contributed by Kriechi.
+
+*Bug fixes
+- Removed extra M109 commands. Older versions would generate superfluous M109 commands. This has been fixed for better temperature stability when printing.
+- Fixed minor mesh handling bugs. A few combinations of modifier meshes now lead to expected behavior.
+- Removed unnecessary travels. Connected infill lines are now always printed completely connected, without unnecessary travel moves.
+- Removed concentric 3D infill. This infill type has been removed due to lack of reliability.
+- Extra skin wall count. Fixed an issue that caused extra print moves with this setting enabled.
+- Concentric skin. Small gaps in concentric skin are now filled correctly.
+- Order of printed models. The order of a large batch of printed models is now more consistent, instead of random.
+
+*Third party printers
+- TiZYX
+- Winbo
+- Tevo Tornado
+- Creality CR-10S
+- Wanhao Duplicator
+- Deltacomb (update)
+- Dacoma (update)
+
 [3.4.1]
 *Bug fixes
 - Fixed an issue that would occasionally cause an unnecessary extra skin wall to be printed, which increased print time.

plugins/ChangeLogPlugin/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Shows changes since latest checked version.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/CuraEngineBackend/CuraEngineBackend.py

@@ -179,8 +179,7 @@ class CuraEngineBackend(QObject, Backend):
     #   This is useful for debugging and used to actually start the engine.
     #   \return list of commands and args / parameters.
     def getEngineCommand(self) -> List[str]:
-        json_path = Resources.getPath(Resources.DefinitionContainers, "fdmprinter.def.json")
+        command = [self._application.getPreferences().getValue("backend/location"), "connect", "127.0.0.1:{0}".format(self._port), ""]
-        command = [self._application.getPreferences().getValue("backend/location"), "connect", "127.0.0.1:{0}".format(self._port), "-j", json_path, ""]
 
         parser = argparse.ArgumentParser(prog = "cura", add_help = False)
         parser.add_argument("--debug", action = "store_true", default = False, help = "Turn on the debug mode by setting this option.")
@@ -343,7 +342,7 @@ class CuraEngineBackend(QObject, Backend):
                 if not self._global_container_stack:
                     Logger.log("w", "Global container stack not assigned to CuraEngineBackend!")
                     return
-                extruders = list(ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId()))
+                extruders = ExtruderManager.getInstance().getActiveExtruderStacks()
                 error_keys = [] #type: List[str]
                 for extruder in extruders:
                     error_keys.extend(extruder.getErrorKeys())

plugins/CuraEngineBackend/ProcessSlicedLayersJob.py

@@ -178,7 +178,7 @@ class ProcessSlicedLayersJob(Job):
         # Find out colors per extruder
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         manager = ExtruderManager.getInstance()
-        extruders = list(manager.getMachineExtruders(global_container_stack.getId()))
+        extruders = manager.getActiveExtruderStacks()
         if extruders:
             material_color_map = numpy.zeros((len(extruders), 4), dtype=numpy.float32)
             for extruder in extruders:

plugins/CuraEngineBackend/StartSliceJob.py

@@ -220,8 +220,10 @@ class StartSliceJob(Job):
                 stack = global_stack
                 skip_group = False
                 for node in group:
+                    # Only check if the printing extruder is enabled for printing meshes
+                    is_non_printing_mesh = node.callDecoration("evaluateIsNonPrintingMesh")
                     extruder_position = node.callDecoration("getActiveExtruderPosition")
-                    if not extruders_enabled[extruder_position]:
+                    if not is_non_printing_mesh and not extruders_enabled[extruder_position]:
                         skip_group = True
                         has_model_with_disabled_extruders = True
                         associated_disabled_extruders.add(extruder_position)
@@ -331,7 +333,7 @@ class StartSliceJob(Job):
                 "-1": self._buildReplacementTokens(global_stack)
             }
 
-            for extruder_stack in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
+            for extruder_stack in ExtruderManager.getInstance().getActiveExtruderStacks():
                 extruder_nr = extruder_stack.getProperty("extruder_nr", "value")
                 self._all_extruders_settings[str(extruder_nr)] = self._buildReplacementTokens(extruder_stack)
 
@@ -438,8 +440,7 @@ class StartSliceJob(Job):
             Job.yieldThread()
 
         # Ensure that the engine is aware what the build extruder is.
-        if stack.getProperty("machine_extruder_count", "value") > 1:
+        changed_setting_keys.add("extruder_nr")
-            changed_setting_keys.add("extruder_nr")
 
         # Get values for all changed settings
         for key in changed_setting_keys:

plugins/CuraEngineBackend/plugin.json

@@ -2,7 +2,7 @@
     "name": "CuraEngine Backend",
     "author": "Ultimaker B.V.",
     "description": "Provides the link to the CuraEngine slicing backend.",
-    "api": 4,
+    "api": 5,
     "version": "1.0.0",
     "i18n-catalog": "cura"
 }

plugins/CuraProfileReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides support for importing Cura profiles.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/CuraProfileWriter/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides support for exporting Cura profiles.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog":"cura"
 }

plugins/FirmwareUpdateChecker/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Checks for firmware updates.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/GCodeGzReader/GCodeGzReader.py

@@ -4,15 +4,22 @@
 import gzip
 
 from UM.Mesh.MeshReader import MeshReader #The class we're extending/implementing.
+from UM.MimeTypeDatabase import MimeTypeDatabase, MimeType #To add the .gcode.gz files to the MIME type database.
 from UM.PluginRegistry import PluginRegistry
 
-
 ##  A file reader that reads gzipped g-code.
 #
 #   If you're zipping g-code, you might as well use gzip!
 class GCodeGzReader(MeshReader):
     def __init__(self) -> None:
         super().__init__()
+        MimeTypeDatabase.addMimeType(
+            MimeType(
+                name = "application/x-cura-compressed-gcode-file",
+                comment = "Cura Compressed GCode File",
+                suffixes = ["gcode.gz"]
+            )
+        )
         self._supported_extensions = [".gcode.gz"]
 
     def _read(self, file_name):

plugins/GCodeGzReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Reads g-code from a compressed archive.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/GCodeGzWriter/GCodeGzWriter.py

@@ -17,6 +17,10 @@ catalog = i18nCatalog("cura")
 #
 #   If you're zipping g-code, you might as well use gzip!
 class GCodeGzWriter(MeshWriter):
+
+    def __init__(self) -> None:
+        super().__init__(add_to_recent_files = False)
+
     ##  Writes the gzipped g-code to a stream.
     #
     #   Note that even though the function accepts a collection of nodes, the

plugins/GCodeGzWriter/__init__.py

@@ -16,7 +16,8 @@ def getMetaData():
                 "extension": file_extension,
                 "description": catalog.i18nc("@item:inlistbox", "Compressed G-code File"),
                 "mime_type": "application/gzip",
-                "mode": GCodeGzWriter.GCodeGzWriter.OutputMode.BinaryMode
+                "mode": GCodeGzWriter.GCodeGzWriter.OutputMode.BinaryMode,
+                "hide_in_file_dialog": True,
             }]
         }
     }

plugins/GCodeGzWriter/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Writes g-code to a compressed archive.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/GCodeProfileReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides support for importing profiles from g-code files.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/GCodeReader/FlavorParser.py

@@ -275,7 +275,7 @@ class FlavorParser:
     ##  For showing correct x, y offsets for each extruder
     def _extruderOffsets(self) -> Dict[int, List[float]]:
         result = {}
-        for extruder in ExtruderManager.getInstance().getExtruderStacks():
+        for extruder in ExtruderManager.getInstance().getActiveExtruderStacks():
             result[int(extruder.getMetaData().get("position", "0"))] = [
                 extruder.getProperty("machine_nozzle_offset_x", "value"),
                 extruder.getProperty("machine_nozzle_offset_y", "value")]

plugins/GCodeReader/GCodeReader.py

@@ -1,4 +1,5 @@
 # Copyright (c) 2017 Aleph Objects, Inc.
+# Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from UM.FileHandler.FileReader import FileReader
@@ -11,13 +12,7 @@ catalog = i18nCatalog("cura")
 from . import MarlinFlavorParser, RepRapFlavorParser
 
 
-MimeTypeDatabase.addMimeType(
+
-    MimeType(
-        name = "application/x-cura-gcode-file",
-        comment = "Cura GCode File",
-        suffixes = ["gcode", "gcode.gz"]
-    )
-)
 
 
 # Class for loading and parsing G-code files
@@ -29,7 +24,15 @@ class GCodeReader(MeshReader):
 
     def __init__(self) -> None:
         super().__init__()
+        MimeTypeDatabase.addMimeType(
+            MimeType(
+                name = "application/x-cura-gcode-file",
+                comment = "Cura GCode File",
+                suffixes = ["gcode"]
+            )
+        )
         self._supported_extensions = [".gcode", ".g"]
+
         self._flavor_reader = None
 
         Application.getInstance().getPreferences().addPreference("gcodereader/show_caution", True)

plugins/GCodeReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Victor Larchenko",
     "version": "1.0.0",
     "description": "Allows loading and displaying G-code files.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/GCodeWriter/GCodeWriter.py

@@ -47,7 +47,7 @@ class GCodeWriter(MeshWriter):
     _setting_keyword = ";SETTING_"
 
     def __init__(self):
-        super().__init__()
+        super().__init__(add_to_recent_files = False)
 
         self._application = Application.getInstance()
 

plugins/GCodeWriter/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Writes g-code to a file.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/ImageReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Enables ability to generate printable geometry from 2D image files.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/LegacyProfileReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides support for importing profiles from legacy Cura versions.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/MachineSettingsAction/MachineSettingsAction.qml

@@ -16,6 +16,8 @@ Cura.MachineAction
     property var extrudersModel: Cura.ExtrudersModel{}
     property int extruderTabsCount: 0
 
+    property var activeMachineId: Cura.MachineManager.activeMachine != null ? Cura.MachineManager.activeMachine.id : ""
+
     Connections
     {
         target: base.extrudersModel
@@ -511,7 +513,7 @@ Cura.MachineAction
                         }
                         return "";
                     }
-                    return Cura.MachineManager.activeMachineId;
+                    return base.activeMachineId
                 }
                 key: settingKey
                 watchedProperties: [ "value", "description" ]
@@ -564,7 +566,7 @@ Cura.MachineAction
                         }
                         return "";
                     }
-                    return Cura.MachineManager.activeMachineId;
+                    return base.activeMachineId
                 }
                 key: settingKey
                 watchedProperties: [ "value", "description" ]
@@ -655,7 +657,7 @@ Cura.MachineAction
                         }
                         return "";
                     }
-                    return Cura.MachineManager.activeMachineId;
+                    return base.activeMachineId
                 }
                 key: settingKey
                 watchedProperties: [ "value", "options", "description" ]
@@ -754,7 +756,7 @@ Cura.MachineAction
                         }
                         return "";
                     }
-                    return Cura.MachineManager.activeMachineId;
+                    return base.activeMachineId
                 }
                 key: settingKey
                 watchedProperties: [ "value", "description" ]
@@ -879,7 +881,7 @@ Cura.MachineAction
     {
         id: machineExtruderCountProvider
 
-        containerStackId: Cura.MachineManager.activeMachineId
+        containerStackId: base.activeMachineId
         key: "machine_extruder_count"
         watchedProperties: [ "value", "description" ]
         storeIndex: manager.containerIndex
@@ -889,7 +891,7 @@ Cura.MachineAction
     {
         id: machineHeadPolygonProvider
 
-        containerStackId: Cura.MachineManager.activeMachineId
+        containerStackId: base.activeMachineId
         key: "machine_head_with_fans_polygon"
         watchedProperties: [ "value" ]
         storeIndex: manager.containerIndex

plugins/MachineSettingsAction/plugin.json

@@ -3,6 +3,6 @@
     "author": "fieldOfView",
     "version": "1.0.0",
     "description": "Provides a way to change machine settings (such as build volume, nozzle size, etc.).",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/ModelChecker/plugin.json

@@ -2,7 +2,7 @@
     "name": "Model Checker",
     "author": "Ultimaker B.V.",
     "version": "0.1",
-    "api": 4,
+    "api": 5,
     "description": "Checks models and print configuration for possible printing issues and give suggestions.",
     "i18n-catalog": "cura"
 }

plugins/MonitorStage/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides a monitor stage in Cura.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml

@@ -17,7 +17,6 @@ Item {
 
     width: childrenRect.width;
     height: childrenRect.height;
-
     property var all_categories_except_support: [ "machine_settings", "resolution", "shell", "infill", "material", "speed",
                                     "travel", "cooling", "platform_adhesion", "dual", "meshfix", "blackmagic", "experimental"]
 
@@ -45,7 +44,7 @@ Item {
             UM.SettingPropertyProvider
             {
                 id: meshTypePropertyProvider
-                containerStackId: Cura.MachineManager.activeMachineId
+                containerStack: Cura.MachineManager.activeMachine
                 watchedProperties: [ "enabled" ]
             }
 
@@ -518,7 +517,7 @@ Item {
     {
         id: machineExtruderCount
 
-        containerStackId: Cura.MachineManager.activeMachineId
+        containerStack: Cura.MachineManager.activeMachine
         key: "machine_extruder_count"
         watchedProperties: [ "value" ]
         storeIndex: 0
@@ -528,7 +527,7 @@ Item {
     {
         id: printSequencePropertyProvider
 
-        containerStackId: Cura.MachineManager.activeMachineId
+        containerStack: Cura.MachineManager.activeMachine
         key: "print_sequence"
         watchedProperties: [ "value" ]
         storeIndex: 0

plugins/PerObjectSettingsTool/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides the Per Model Settings.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/PostProcessingPlugin/PostProcessingPlugin.py

@@ -1,5 +1,6 @@
-# Copyright (c) 2015 Jaime van Kessel, Ultimaker B.V.
+# Copyright (c) 2018 Jaime van Kessel, Ultimaker B.V.
 # The PostProcessingPlugin is released under the terms of the AGPLv3 or higher.
+
 from PyQt5.QtCore import QObject, pyqtProperty, pyqtSignal, pyqtSlot
 
 from UM.PluginRegistry import PluginRegistry
@@ -260,6 +261,9 @@ class PostProcessingPlugin(QObject, Extension):
         # Create the plugin dialog component
         path = os.path.join(PluginRegistry.getInstance().getPluginPath("PostProcessingPlugin"), "PostProcessingPlugin.qml")
         self._view = Application.getInstance().createQmlComponent(path, {"manager": self})
+        if self._view is None:
+            Logger.log("e", "Not creating PostProcessing button near save button because the QML component failed to be created.")
+            return
         Logger.log("d", "Post processing view created.")
 
         # Create the save button component
@@ -269,6 +273,9 @@ class PostProcessingPlugin(QObject, Extension):
     def showPopup(self):
         if self._view is None:
             self._createView()
+            if self._view is None:
+                Logger.log("e", "Not creating PostProcessing window since the QML component failed to be created.")
+                return
         self._view.show()
 
     ##  Property changed: trigger re-slice

plugins/PostProcessingPlugin/PostProcessingPlugin.qml

@@ -384,7 +384,7 @@ UM.Dialog
                         UM.SettingPropertyProvider
                         {
                             id: inheritStackProvider
-                            containerStackId: Cura.MachineManager.activeMachineId
+                            containerStack: Cura.MachineManager.activeMachine
                             key: model.key ? model.key : "None"
                             watchedProperties: [ "limit_to_extruder" ]
                         }

plugins/PostProcessingPlugin/plugin.json

@@ -2,7 +2,7 @@
     "name": "Post Processing",
     "author": "Ultimaker",
     "version": "2.2",
-    "api": 4,
+    "api": 5,
     "description": "Extension that allows for user created scripts for post processing",
     "catalog": "cura"
 }

plugins/PostProcessingPlugin/scripts/PauseAtHeightRepRapFirmwareDuet.py

@@ -0,0 +1,51 @@
+from ..Script import Script
+
+class PauseAtHeightRepRapFirmwareDuet(Script):
+
+    def getSettingDataString(self):
+        return """{
+            "name": "Pause at height for RepRapFirmware DuetWifi / Duet Ethernet / Duet Maestro",
+            "key": "PauseAtHeightRepRapFirmwareDuet",
+            "metadata": {},
+            "version": 2,
+            "settings":
+            {
+                "pause_height":
+                {
+                    "label": "Pause height",
+                    "description": "At what height should the pause occur",
+                    "unit": "mm",
+                    "type": "float",
+                    "default_value": 5.0
+                }
+            }
+        }"""
+
+    def execute(self, data):
+        current_z = 0.
+        pause_z = self.getSettingValueByKey("pause_height")
+
+        layers_started = False
+        for layer_number, layer in enumerate(data):
+            lines = layer.split("\n")
+            for line in lines:
+                if ";LAYER:0" in line:
+                    layers_started = True
+                    continue
+
+                if not layers_started:
+                    continue
+
+                if self.getValue(line, 'G') == 1 or self.getValue(line, 'G') == 0:
+                    current_z = self.getValue(line, 'Z')
+                    if current_z != None:
+                        if current_z >= pause_z:
+                            prepend_gcode = ";TYPE:CUSTOM\n"
+                            prepend_gcode += "; -- Pause at height (%.2f mm) --\n" % pause_z
+                            prepend_gcode += self.putValue(M = 226) + "\n"
+                            layer = prepend_gcode + layer
+
+                            data[layer_number] = layer # Override the data of this layer with the modified data
+                            return data
+                        break
+        return data

plugins/PrepareStage/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides a prepare stage in Cura.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/RemovableDriveOutputDevice/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "description": "Provides removable drive hotplugging and writing support.",
     "version": "1.0.0",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/SimulationView/LayerSlider.qml

@@ -9,7 +9,8 @@ import QtQuick.Controls.Styles 1.1
 import UM 1.0 as UM
 import Cura 1.0 as Cura
 
-Item {
+Item
+{
     id: sliderRoot
 
     // handle properties
@@ -39,40 +40,49 @@ Item {
     property real lowerValue: minimumValue
 
     property bool layersVisible: true
+    property bool manuallyChanged: true     // Indicates whether the value was changed manually or during simulation
 
-    function getUpperValueFromSliderHandle() {
+    function getUpperValueFromSliderHandle()
+    {
         return upperHandle.getValue()
     }
 
-    function setUpperValue(value) {
+    function setUpperValue(value)
+    {
         upperHandle.setValue(value)
         updateRangeHandle()
     }
 
-    function getLowerValueFromSliderHandle() {
+    function getLowerValueFromSliderHandle()
+    {
         return lowerHandle.getValue()
     }
 
-    function setLowerValue(value) {
+    function setLowerValue(value)
+    {
         lowerHandle.setValue(value)
         updateRangeHandle()
     }
 
-    function updateRangeHandle() {
+    function updateRangeHandle()
+    {
         rangeHandle.height = lowerHandle.y - (upperHandle.y + upperHandle.height)
     }
 
     // set the active handle to show only one label at a time
-    function setActiveHandle(handle) {
+    function setActiveHandle(handle)
+    {
         activeHandle = handle
     }
 
-    function normalizeValue(value) {
+    function normalizeValue(value)
+    {
         return Math.min(Math.max(value, sliderRoot.minimumValue), sliderRoot.maximumValue)
     }
 
     // slider track
-    Rectangle {
+    Rectangle
+    {
         id: track
 
         width: sliderRoot.trackThickness
@@ -86,7 +96,8 @@ Item {
     }
 
     // Range handle
-    Item {
+    Item
+    {
         id: rangeHandle
 
         y: upperHandle.y + upperHandle.height
@@ -96,7 +107,9 @@ Item {
         visible: sliderRoot.layersVisible
 
         // set the new value when dragging
-        function onHandleDragged () {
+        function onHandleDragged()
+        {
+            sliderRoot.manuallyChanged = true
 
             upperHandle.y = y - upperHandle.height
             lowerHandle.y = y + height
@@ -109,7 +122,14 @@ Item {
             UM.SimulationView.setMinimumLayer(lowerValue)
         }
 
-        function setValue (value) {
+        function setValueManually(value)
+        {
+            sliderRoot.manuallyChanged = true
+            upperHandle.setValue(value)
+        }
+
+        function setValue(value)
+        {
             var range = sliderRoot.upperValue - sliderRoot.lowerValue
             value = Math.min(value, sliderRoot.maximumValue)
             value = Math.max(value, sliderRoot.minimumValue + range)
@@ -118,17 +138,20 @@ Item {
             UM.SimulationView.setMinimumLayer(value - range)
         }
 
-        Rectangle {
+        Rectangle
+        {
             width: sliderRoot.trackThickness - 2 * sliderRoot.trackBorderWidth
             height: parent.height + sliderRoot.handleSize
             anchors.centerIn: parent
             color: sliderRoot.rangeHandleColor
         }
 
-        MouseArea {
+        MouseArea
+        {
             anchors.fill: parent
 
-            drag {
+            drag
+            {
                 target: parent
                 axis: Drag.YAxis
                 minimumY: upperHandle.height
@@ -139,7 +162,8 @@ Item {
             onPressed: sliderRoot.setActiveHandle(rangeHandle)
         }
 
-        SimulationSliderLabel {
+        SimulationSliderLabel
+        {
             id: rangleHandleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -152,12 +176,13 @@ Item {
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.upperValue
             busy: UM.SimulationView.busy
-            setValue: rangeHandle.setValue // connect callback functions
+            setValue: rangeHandle.setValueManually // connect callback functions
         }
     }
 
     // Upper handle
-    Rectangle {
+    Rectangle
+    {
         id: upperHandle
 
         y: sliderRoot.height - (sliderRoot.minimumRangeHandleSize + 2 * sliderRoot.handleSize)
@@ -168,10 +193,13 @@ Item {
         color: upperHandleLabel.activeFocus ? sliderRoot.handleActiveColor : sliderRoot.upperHandleColor
         visible: sliderRoot.layersVisible
 
-        function onHandleDragged () {
+        function onHandleDragged()
+        {
+            sliderRoot.manuallyChanged = true
 
             // don't allow the lower handle to be heigher than the upper handle
-            if (lowerHandle.y - (y + height) < sliderRoot.minimumRangeHandleSize) {
+            if (lowerHandle.y - (y + height) < sliderRoot.minimumRangeHandleSize)
+            {
                 lowerHandle.y = y + height + sliderRoot.minimumRangeHandleSize
             }
 
@@ -183,15 +211,23 @@ Item {
         }
 
         // get the upper value based on the slider position
-        function getValue () {
+        function getValue()
+        {
             var result = y / (sliderRoot.height - (2 * sliderRoot.handleSize + sliderRoot.minimumRangeHandleSize))
             result = sliderRoot.maximumValue + result * (sliderRoot.minimumValue - (sliderRoot.maximumValue - sliderRoot.minimumValue))
             result = sliderRoot.roundValues ? Math.round(result) : result
             return result
         }
 
+        function setValueManually(value)
+        {
+            sliderRoot.manuallyChanged = true
+            upperHandle.setValue(value)
+        }
+
         // set the slider position based on the upper value
-        function setValue (value) {
+        function setValue(value)
+        {
             // Normalize values between range, since using arrow keys will create out-of-the-range values
             value = sliderRoot.normalizeValue(value)
 
@@ -209,10 +245,12 @@ Item {
         Keys.onDownPressed: upperHandleLabel.setValue(upperHandleLabel.value - ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
 
         // dragging
-        MouseArea {
+        MouseArea
+        {
             anchors.fill: parent
 
-            drag {
+            drag
+            {
                 target: parent
                 axis: Drag.YAxis
                 minimumY: 0
@@ -220,13 +258,15 @@ Item {
             }
 
             onPositionChanged: parent.onHandleDragged()
-            onPressed: {
+            onPressed:
+            {
                 sliderRoot.setActiveHandle(upperHandle)
                 upperHandleLabel.forceActiveFocus()
             }
         }
 
-        SimulationSliderLabel {
+        SimulationSliderLabel
+        {
             id: upperHandleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -239,12 +279,13 @@ Item {
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.upperValue
             busy: UM.SimulationView.busy
-            setValue: upperHandle.setValue // connect callback functions
+            setValue: upperHandle.setValueManually // connect callback functions
         }
     }
 
     // Lower handle
-    Rectangle {
+    Rectangle
+    {
         id: lowerHandle
 
         y: sliderRoot.height - sliderRoot.handleSize
@@ -256,10 +297,13 @@ Item {
 
         visible: sliderRoot.layersVisible
 
-        function onHandleDragged () {
+        function onHandleDragged()
+        {
+            sliderRoot.manuallyChanged = true
 
             // don't allow the upper handle to be lower than the lower handle
-            if (y - (upperHandle.y + upperHandle.height) < sliderRoot.minimumRangeHandleSize) {
+            if (y - (upperHandle.y + upperHandle.height) < sliderRoot.minimumRangeHandleSize)
+            {
                 upperHandle.y = y - (upperHandle.heigth + sliderRoot.minimumRangeHandleSize)
             }
 
@@ -271,15 +315,24 @@ Item {
         }
 
         // get the lower value from the current slider position
-        function getValue () {
+        function getValue()
+        {
             var result = (y - (sliderRoot.handleSize + sliderRoot.minimumRangeHandleSize)) / (sliderRoot.height - (2 * sliderRoot.handleSize + sliderRoot.minimumRangeHandleSize));
             result = sliderRoot.maximumValue - sliderRoot.minimumRange + result * (sliderRoot.minimumValue - (sliderRoot.maximumValue - sliderRoot.minimumRange))
             result = sliderRoot.roundValues ? Math.round(result) : result
             return result
         }
 
+        function setValueManually(value)
+        {
+            sliderRoot.manuallyChanged = true
+            lowerHandle.setValue(value)
+        }
+
         // set the slider position based on the lower value
-        function setValue (value) {
+        function setValue(value)
+        {
+
             // Normalize values between range, since using arrow keys will create out-of-the-range values
             value = sliderRoot.normalizeValue(value)
 
@@ -297,10 +350,12 @@ Item {
         Keys.onDownPressed: lowerHandleLabel.setValue(lowerHandleLabel.value - ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
 
         // dragging
-        MouseArea {
+        MouseArea
+        {
             anchors.fill: parent
 
-            drag {
+            drag
+            {
                 target: parent
                 axis: Drag.YAxis
                 minimumY: upperHandle.height + sliderRoot.minimumRangeHandleSize
@@ -308,13 +363,15 @@ Item {
             }
 
             onPositionChanged: parent.onHandleDragged()
-            onPressed: {
+            onPressed:
+            {
                 sliderRoot.setActiveHandle(lowerHandle)
                 lowerHandleLabel.forceActiveFocus()
             }
         }
 
-        SimulationSliderLabel {
+        SimulationSliderLabel
+        {
             id: lowerHandleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -327,7 +384,7 @@ Item {
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.lowerValue
             busy: UM.SimulationView.busy
-            setValue: lowerHandle.setValue // connect callback functions
+            setValue: lowerHandle.setValueManually // connect callback functions
         }
     }
-}
+}

plugins/SimulationView/PathSlider.qml

@@ -9,7 +9,8 @@ import QtQuick.Controls.Styles 1.1
 import UM 1.0 as UM
 import Cura 1.0 as Cura
 
-Item {
+Item
+{
     id: sliderRoot
 
     // handle properties
@@ -34,26 +35,32 @@ Item {
     property real handleValue: maximumValue
 
     property bool pathsVisible: true
+    property bool manuallyChanged: true     // Indicates whether the value was changed manually or during simulation
 
-    function getHandleValueFromSliderHandle () {
+    function getHandleValueFromSliderHandle()
+    {
         return handle.getValue()
     }
 
-    function setHandleValue (value) {
+    function setHandleValue(value)
+    {
         handle.setValue(value)
         updateRangeHandle()
     }
 
-    function updateRangeHandle () {
+    function updateRangeHandle()
+    {
         rangeHandle.width = handle.x - sliderRoot.handleSize
     }
 
-    function normalizeValue(value) {
+    function normalizeValue(value)
+    {
         return Math.min(Math.max(value, sliderRoot.minimumValue), sliderRoot.maximumValue)
     }
 
     // slider track
-    Rectangle {
+    Rectangle
+    {
         id: track
 
         width: sliderRoot.width - sliderRoot.handleSize
@@ -67,7 +74,8 @@ Item {
     }
 
     // Progress indicator
-    Item {
+    Item
+    {
         id: rangeHandle
 
         x: handle.width
@@ -76,7 +84,8 @@ Item {
         anchors.verticalCenter: sliderRoot.verticalCenter
         visible: sliderRoot.pathsVisible
 
-        Rectangle {
+        Rectangle
+        {
             height: sliderRoot.trackThickness - 2 * sliderRoot.trackBorderWidth
             width: parent.width + sliderRoot.handleSize
             anchors.centerIn: parent
@@ -85,7 +94,8 @@ Item {
     }
 
     // Handle
-    Rectangle {
+    Rectangle
+    {
         id: handle
 
         x: sliderRoot.handleSize
@@ -96,7 +106,9 @@ Item {
         color: handleLabel.activeFocus ? sliderRoot.handleActiveColor : sliderRoot.handleColor
         visible: sliderRoot.pathsVisible
 
-        function onHandleDragged () {
+        function onHandleDragged()
+        {
+            sliderRoot.manuallyChanged = true
 
             // update the range handle
             sliderRoot.updateRangeHandle()
@@ -106,15 +118,23 @@ Item {
         }
 
         // get the value based on the slider position
-        function getValue () {
+        function getValue()
+        {
             var result = x / (sliderRoot.width - sliderRoot.handleSize)
             result = result * sliderRoot.maximumValue
             result = sliderRoot.roundValues ? Math.round(result) : result
             return result
         }
 
+        function setValueManually(value)
+        {
+            sliderRoot.manuallyChanged = true
+            handle.setValue(value)
+        }
+
         // set the slider position based on the value
-        function setValue (value) {
+        function setValue(value)
+        {
             // Normalize values between range, since using arrow keys will create out-of-the-range values
             value = sliderRoot.normalizeValue(value)
 
@@ -132,23 +152,23 @@ Item {
         Keys.onLeftPressed: handleLabel.setValue(handleLabel.value - ((event.modifiers & Qt.ShiftModifier) ? 10 : 1))
 
         // dragging
-        MouseArea {
+        MouseArea
+        {
             anchors.fill: parent
 
-            drag {
+            drag
+            {
                 target: parent
                 axis: Drag.XAxis
                 minimumX: 0
                 maximumX: sliderRoot.width - sliderRoot.handleSize
             }
-            onPressed: {
+            onPressed: handleLabel.forceActiveFocus()
-                handleLabel.forceActiveFocus()
-            }
-
             onPositionChanged: parent.onHandleDragged()
         }
 
-        SimulationSliderLabel {
+        SimulationSliderLabel
+        {
             id: handleLabel
 
             height: sliderRoot.handleSize + UM.Theme.getSize("default_margin").height
@@ -162,7 +182,7 @@ Item {
             maximumValue: sliderRoot.maximumValue
             value: sliderRoot.handleValue
             busy: UM.SimulationView.busy
-            setValue: handle.setValue // connect callback functions
+            setValue: handle.setValueManually // connect callback functions
         }
     }
 }

plugins/SimulationView/SimulationSliderLabel.qml

@@ -44,12 +44,11 @@ UM.PointingRectangle {
         id: valueLabel
 
         anchors {
-            left: parent.left
-            leftMargin: Math.round(UM.Theme.getSize("default_margin").width / 2)
             verticalCenter: parent.verticalCenter
+            horizontalCenter: parent.horizontalCenter
         }
 
-        width: maximumValue.toString().length * 12 * screenScaleFactor
+        width: (maximumValue.toString().length + 1) * 10 * screenScaleFactor
         text: sliderLabelRoot.value + startFrom // the current handle value, add 1 because layers is an array
         horizontalAlignment: TextInput.AlignRight
 

plugins/SimulationView/SimulationView.py

@@ -18,10 +18,13 @@ from UM.Platform import Platform
 from UM.PluginRegistry import PluginRegistry
 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
 from cura.Scene.ConvexHullNode import ConvexHullNode
@@ -30,11 +33,20 @@ from cura.CuraApplication import CuraApplication
 from .NozzleNode import NozzleNode
 from .SimulationPass import SimulationPass
 from .SimulationViewProxy import SimulationViewProxy
+import numpy
+import os.path
+
+from typing import Optional, TYPE_CHECKING, List
+
+if TYPE_CHECKING:
+    from UM.Scene.SceneNode import SceneNode
+    from UM.Scene.Scene import Scene
+    from UM.View.GL.ShaderProgram import ShaderProgram
+    from UM.View.RenderPass import RenderPass
+    from UM.Settings.ContainerStack import ContainerStack
 
 catalog = i18nCatalog("cura")
 
-import numpy
-import os.path
 
 ## View used to display g-code paths.
 class SimulationView(View):
@@ -44,7 +56,7 @@ class SimulationView(View):
     LAYER_VIEW_TYPE_FEEDRATE = 2
     LAYER_VIEW_TYPE_THICKNESS = 3
 
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
 
         self._max_layers = 0
@@ -64,21 +76,21 @@ class SimulationView(View):
         self._busy = False
         self._simulation_running = False
 
-        self._ghost_shader = None
+        self._ghost_shader = None  # type: Optional["ShaderProgram"]
-        self._layer_pass = None
+        self._layer_pass = None  # type: Optional[SimulationPass]
-        self._composite_pass = None
+        self._composite_pass = None  # type: Optional[RenderPass]
         self._old_layer_bindings = None
-        self._simulationview_composite_shader = None
+        self._simulationview_composite_shader = None  # type: Optional["ShaderProgram"]
         self._old_composite_shader = None
 
-        self._global_container_stack = None
+        self._global_container_stack = None  # type: Optional[ContainerStack]
         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
+        self._nozzle_node = None  # type: Optional[NozzleNode]
 
         Application.getInstance().getPreferences().addPreference("view/top_layer_count", 5)
         Application.getInstance().getPreferences().addPreference("view/only_show_top_layers", False)
@@ -102,29 +114,29 @@ class SimulationView(View):
         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", "Simulation View"))
 
-    def _evaluateCompatibilityMode(self):
+    def _evaluateCompatibilityMode(self) -> bool:
         return OpenGLContext.isLegacyOpenGL() or bool(Application.getInstance().getPreferences().getValue("view/force_layer_view_compatibility_mode"))
 
-    def _resetSettings(self):
+    def _resetSettings(self) -> None:
-        self._layer_view_type = 0  # 0 is material color, 1 is color by linetype, 2 is speed, 3 is layer thickness
+        self._layer_view_type = 0  # type: int # 0 is material color, 1 is color by linetype, 2 is speed, 3 is layer thickness
         self._extruder_count = 0
         self._extruder_opacity = [1.0, 1.0, 1.0, 1.0]
-        self._show_travel_moves = 0
+        self._show_travel_moves = False
-        self._show_helpers = 1
+        self._show_helpers = True
-        self._show_skin = 1
+        self._show_skin = True
-        self._show_infill = 1
+        self._show_infill = True
         self.resetLayerData()
 
-    def getActivity(self):
+    def getActivity(self) -> bool:
         return self._activity
 
-    def setActivity(self, activity):
+    def setActivity(self, activity: bool) -> None:
         if self._activity == activity:
             return
         self._activity = activity
         self.activityChanged.emit()
 
-    def getSimulationPass(self):
+    def getSimulationPass(self) -> SimulationPass:
         if not self._layer_pass:
             # Currently the RenderPass constructor requires a size > 0
             # This should be fixed in RenderPass's constructor.
@@ -133,30 +145,30 @@ class SimulationView(View):
             self._layer_pass.setSimulationView(self)
         return self._layer_pass
 
-    def getCurrentLayer(self):
+    def getCurrentLayer(self) -> int:
         return self._current_layer_num
 
-    def getMinimumLayer(self):
+    def getMinimumLayer(self) -> int:
         return self._minimum_layer_num
 
-    def getMaxLayers(self):
+    def getMaxLayers(self) -> int:
         return self._max_layers
 
-    def getCurrentPath(self):
+    def getCurrentPath(self) -> int:
         return self._current_path_num
 
-    def getMinimumPath(self):
+    def getMinimumPath(self) -> int:
         return self._minimum_path_num
 
-    def getMaxPaths(self):
+    def getMaxPaths(self) -> int:
         return self._max_paths
 
-    def getNozzleNode(self):
+    def getNozzleNode(self) -> NozzleNode:
         if not self._nozzle_node:
             self._nozzle_node = NozzleNode()
         return self._nozzle_node
 
-    def _onSceneChanged(self, node):
+    def _onSceneChanged(self, node: "SceneNode") -> None:
         if node.getMeshData() is None:
             self.resetLayerData()
 
@@ -164,21 +176,21 @@ class SimulationView(View):
         self.calculateMaxLayers()
         self.calculateMaxPathsOnLayer(self._current_layer_num)
 
-    def isBusy(self):
+    def isBusy(self) -> bool:
         return self._busy
 
-    def setBusy(self, busy):
+    def setBusy(self, busy: bool) -> None:
         if busy != self._busy:
             self._busy = busy
             self.busyChanged.emit()
 
-    def isSimulationRunning(self):
+    def isSimulationRunning(self) -> bool:
         return self._simulation_running
 
-    def setSimulationRunning(self, running):
+    def setSimulationRunning(self, running: bool) -> None:
         self._simulation_running = running
 
-    def resetLayerData(self):
+    def resetLayerData(self) -> None:
         self._current_layer_mesh = None
         self._current_layer_jumps = None
         self._max_feedrate = sys.float_info.min
@@ -186,7 +198,7 @@ class SimulationView(View):
         self._max_thickness = sys.float_info.min
         self._min_thickness = sys.float_info.max
 
-    def beginRendering(self):
+    def beginRendering(self) -> None:
         scene = self.getController().getScene()
         renderer = self.getRenderer()
 
@@ -204,7 +216,7 @@ class SimulationView(View):
                 if (node.getMeshData()) and node.isVisible():
                     renderer.queueNode(node, transparent = True, shader = self._ghost_shader)
 
-    def setLayer(self, value):
+    def setLayer(self, value: int) -> None:
         if self._current_layer_num != value:
             self._current_layer_num = value
             if self._current_layer_num < 0:
@@ -218,7 +230,7 @@ class SimulationView(View):
 
             self.currentLayerNumChanged.emit()
 
-    def setMinimumLayer(self, value):
+    def setMinimumLayer(self, value: int) -> None:
         if self._minimum_layer_num != value:
             self._minimum_layer_num = value
             if self._minimum_layer_num < 0:
@@ -232,7 +244,7 @@ class SimulationView(View):
 
             self.currentLayerNumChanged.emit()
 
-    def setPath(self, value):
+    def setPath(self, value: int) -> None:
         if self._current_path_num != value:
             self._current_path_num = value
             if self._current_path_num < 0:
@@ -246,7 +258,7 @@ class SimulationView(View):
 
             self.currentPathNumChanged.emit()
 
-    def setMinimumPath(self, value):
+    def setMinimumPath(self, value: int) -> None:
         if self._minimum_path_num != value:
             self._minimum_path_num = value
             if self._minimum_path_num < 0:
@@ -263,24 +275,24 @@ class SimulationView(View):
     ##  Set the layer view type
     #
     #   \param layer_view_type integer as in SimulationView.qml and this class
-    def setSimulationViewType(self, layer_view_type):
+    def setSimulationViewType(self, layer_view_type: int) -> None:
         self._layer_view_type = layer_view_type
         self.currentLayerNumChanged.emit()
 
     ##  Return the layer view type, integer as in SimulationView.qml and this class
-    def getSimulationViewType(self):
+    def getSimulationViewType(self) -> int:
         return self._layer_view_type
 
     ##  Set the extruder opacity
     #
     #   \param extruder_nr 0..3
     #   \param opacity 0.0 .. 1.0
-    def setExtruderOpacity(self, extruder_nr, opacity):
+    def setExtruderOpacity(self, extruder_nr: int, opacity: float) -> None:
         if 0 <= extruder_nr <= 3:
             self._extruder_opacity[extruder_nr] = opacity
             self.currentLayerNumChanged.emit()
 
-    def getExtruderOpacities(self):
+    def getExtruderOpacities(self)-> List[float]:
         return self._extruder_opacity
 
     def setShowTravelMoves(self, show):
@@ -290,46 +302,46 @@ class SimulationView(View):
     def getShowTravelMoves(self):
         return self._show_travel_moves
 
-    def setShowHelpers(self, show):
+    def setShowHelpers(self, show: bool) -> None:
         self._show_helpers = show
         self.currentLayerNumChanged.emit()
 
-    def getShowHelpers(self):
+    def getShowHelpers(self) -> bool:
         return self._show_helpers
 
-    def setShowSkin(self, show):
+    def setShowSkin(self, show: bool) -> None:
         self._show_skin = show
         self.currentLayerNumChanged.emit()
 
-    def getShowSkin(self):
+    def getShowSkin(self) -> bool:
         return self._show_skin
 
-    def setShowInfill(self, show):
+    def setShowInfill(self, show: bool) -> None:
         self._show_infill = show
         self.currentLayerNumChanged.emit()
 
-    def getShowInfill(self):
+    def getShowInfill(self) -> bool:
         return self._show_infill
 
-    def getCompatibilityMode(self):
+    def getCompatibilityMode(self) -> bool:
         return self._compatibility_mode
 
-    def getExtruderCount(self):
+    def getExtruderCount(self) -> int:
         return self._extruder_count
 
-    def getMinFeedrate(self):
+    def getMinFeedrate(self) -> float:
         return self._min_feedrate
 
-    def getMaxFeedrate(self):
+    def getMaxFeedrate(self) -> float:
         return self._max_feedrate
 
-    def getMinThickness(self):
+    def getMinThickness(self) -> float:
         return self._min_thickness
 
-    def getMaxThickness(self):
+    def getMaxThickness(self) -> float:
         return self._max_thickness
 
-    def calculateMaxLayers(self):
+    def calculateMaxLayers(self) -> None:
         scene = self.getController().getScene()
 
         self._old_max_layers = self._max_layers
@@ -383,7 +395,7 @@ class SimulationView(View):
                 self.maxLayersChanged.emit()
         self._startUpdateTopLayers()
 
-    def calculateMaxPathsOnLayer(self, layer_num):
+    def calculateMaxPathsOnLayer(self, layer_num: int) -> None:
         # Update the currentPath
         scene = self.getController().getScene()
         for node in DepthFirstIterator(scene.getRoot()):
@@ -415,10 +427,10 @@ class SimulationView(View):
     def getProxy(self, engine, script_engine):
         return self._proxy
 
-    def endRendering(self):
+    def endRendering(self) -> None:
         pass
 
-    def event(self, event):
+    def event(self, event) -> bool:
         modifiers = QApplication.keyboardModifiers()
         ctrl_is_active = modifiers & Qt.ControlModifier
         shift_is_active = modifiers & Qt.ShiftModifier
@@ -447,7 +459,7 @@ class SimulationView(View):
                 if QOpenGLContext.currentContext() is None:
                     Logger.log("d", "current context of OpenGL is empty on Mac OS X, will try to create shaders later")
                     CuraApplication.getInstance().callLater(lambda e=event: self.event(e))
-                    return
+                    return False
 
             # Make sure the SimulationPass is created
             layer_pass = self.getSimulationPass()
@@ -480,11 +492,14 @@ class SimulationView(View):
             Application.getInstance().globalContainerStackChanged.disconnect(self._onGlobalStackChanged)
             if self._global_container_stack:
                 self._global_container_stack.propertyChanged.disconnect(self._onPropertyChanged)
-
+            if self._nozzle_node:
-            self._nozzle_node.setParent(None)
+                self._nozzle_node.setParent(None)
             self.getRenderer().removeRenderPass(self._layer_pass)
-            self._composite_pass.setLayerBindings(self._old_layer_bindings)
+            if self._composite_pass:
-            self._composite_pass.setCompositeShader(self._old_composite_shader)
+                self._composite_pass.setLayerBindings(self._old_layer_bindings)
+                self._composite_pass.setCompositeShader(self._old_composite_shader)
+
+        return False
 
     def getCurrentLayerMesh(self):
         return self._current_layer_mesh
@@ -492,7 +507,7 @@ class SimulationView(View):
     def getCurrentLayerJumps(self):
         return self._current_layer_jumps
 
-    def _onGlobalStackChanged(self):
+    def _onGlobalStackChanged(self) -> None:
         if self._global_container_stack:
             self._global_container_stack.propertyChanged.disconnect(self._onPropertyChanged)
         self._global_container_stack = Application.getInstance().getGlobalContainerStack()
@@ -504,17 +519,17 @@ class SimulationView(View):
         else:
             self._wireprint_warning_message.hide()
 
-    def _onPropertyChanged(self, key, property_name):
+    def _onPropertyChanged(self, key: str, property_name: str) -> None:
         if key == "wireframe_enabled" and property_name == "value":
-            if self._global_container_stack.getProperty("wireframe_enabled", "value"):
+            if self._global_container_stack and self._global_container_stack.getProperty("wireframe_enabled", "value"):
                 self._wireprint_warning_message.show()
             else:
                 self._wireprint_warning_message.hide()
 
-    def _onCurrentLayerNumChanged(self):
+    def _onCurrentLayerNumChanged(self) -> None:
         self.calculateMaxPathsOnLayer(self._current_layer_num)
 
-    def _startUpdateTopLayers(self):
+    def _startUpdateTopLayers(self) -> None:
         if not self._compatibility_mode:
             return
 
@@ -525,10 +540,10 @@ class SimulationView(View):
         self.setBusy(True)
 
         self._top_layers_job = _CreateTopLayersJob(self._controller.getScene(), self._current_layer_num, self._solid_layers)
-        self._top_layers_job.finished.connect(self._updateCurrentLayerMesh)
+        self._top_layers_job.finished.connect(self._updateCurrentLayerMesh)  # type: ignore  # mypy doesn't understand the whole private class thing that's going on here.
-        self._top_layers_job.start()
+        self._top_layers_job.start()  # type: ignore
 
-    def _updateCurrentLayerMesh(self, job):
+    def _updateCurrentLayerMesh(self, job: "_CreateTopLayersJob") -> None:
         self.setBusy(False)
 
         if not job.getResult():
@@ -539,9 +554,9 @@ class SimulationView(View):
             self._current_layer_jumps = job.getResult().get("jumps")
         self._controller.getScene().sceneChanged.emit(self._controller.getScene().getRoot())
 
-        self._top_layers_job = None
+        self._top_layers_job = None  # type: Optional["_CreateTopLayersJob"]
 
-    def _updateWithPreferences(self):
+    def _updateWithPreferences(self) -> None:
         self._solid_layers = int(Application.getInstance().getPreferences().getValue("view/top_layer_count"))
         self._only_show_top_layers = bool(Application.getInstance().getPreferences().getValue("view/only_show_top_layers"))
         self._compatibility_mode = self._evaluateCompatibilityMode()
@@ -563,7 +578,7 @@ class SimulationView(View):
         self._startUpdateTopLayers()
         self.preferencesChanged.emit()
 
-    def _onPreferencesChanged(self, preference):
+    def _onPreferencesChanged(self, preference: str) -> None:
         if preference not in {
             "view/top_layer_count",
             "view/only_show_top_layers",
@@ -581,7 +596,7 @@ class SimulationView(View):
 
 
 class _CreateTopLayersJob(Job):
-    def __init__(self, scene, layer_number, solid_layers):
+    def __init__(self, scene: "Scene", layer_number: int, solid_layers: int) -> None:
         super().__init__()
 
         self._scene = scene
@@ -589,7 +604,7 @@ class _CreateTopLayersJob(Job):
         self._solid_layers = solid_layers
         self._cancel = False
 
-    def run(self):
+    def run(self) -> None:
         layer_data = None
         for node in DepthFirstIterator(self._scene.getRoot()):
             layer_data = node.callDecoration("getLayerData")
@@ -638,6 +653,6 @@ class _CreateTopLayersJob(Job):
 
         self.setResult({"layers": layer_mesh.build(), "jumps": jump_mesh})
 
-    def cancel(self):
+    def cancel(self) -> None:
         self._cancel = True
         super().cancel()

plugins/SimulationView/SimulationView.qml

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 Ultimaker B.V.
+// Copyright (c) 2018 Ultimaker B.V.
 // Cura is released under the terms of the LGPLv3 or higher.
 
 import QtQuick 2.4
@@ -12,30 +12,43 @@ import Cura 1.0 as Cura
 Item
 {
     id: base
-    width: {
+    width:
-        if (UM.SimulationView.compatibilityMode) {
+    {
+        if (UM.SimulationView.compatibilityMode)
+        {
             return UM.Theme.getSize("layerview_menu_size_compatibility").width;
-        } else {
+        }
+        else
+        {
             return UM.Theme.getSize("layerview_menu_size").width;
         }
     }
     height: {
-        if (viewSettings.collapsed) {
+        if (viewSettings.collapsed)
-            if (UM.SimulationView.compatibilityMode) {
+        {
+            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) {
+        }
+        else if (UM.SimulationView.compatibilityMode)
+        {
             return UM.Theme.getSize("layerview_menu_size_compatibility").height;
-        } else if (UM.Preferences.getValue("layerview/layer_view_type") == 0) {
+        }
+        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 {
+        }
+        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: {
+    property var buttonTarget:
+    {
         if(parent != null)
         {
             var force_binding = parent.y; // ensure this gets reevaluated when the panel moves
@@ -44,7 +57,8 @@ Item
         return Qt.point(0,0)
     }
 
-    Rectangle {
+    Rectangle
+    {
         id: layerViewMenu
         anchors.right: parent.right
         anchors.top: parent.top
@@ -83,7 +97,8 @@ Item
             }
         }
 
-        ColumnLayout {
+        ColumnLayout
+        {
             id: viewSettings
 
             property bool collapsed: false
@@ -195,7 +210,8 @@ Item
                 width: width
             }
 
-            Connections {
+            Connections
+            {
                 target: UM.Preferences
                 onPreferenceChanged:
                 {
@@ -212,18 +228,22 @@ Item
                 }
             }
 
-            Repeater {
+            Repeater
+            {
                 model: Cura.ExtrudersModel{}
-                CheckBox {
+                CheckBox
+                {
                     id: extrudersModelCheckBox
                     checked: viewSettings.extruder_opacities[index] > 0.5 || viewSettings.extruder_opacities[index] == undefined || viewSettings.extruder_opacities[index] == ""
-                    onClicked: {
+                    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 {
+                    Rectangle
+                    {
                         anchors.verticalCenter: parent.verticalCenter
                         anchors.right: extrudersModelCheckBox.right
                         width: UM.Theme.getSize("layerview_legend_size").width
@@ -253,8 +273,10 @@ Item
                 }
             }
 
-            Repeater {
+            Repeater
-                model: ListModel {
+            {
+                model: ListModel
+                {
                     id: typesLegendModel
                     Component.onCompleted:
                     {
@@ -285,13 +307,16 @@ Item
                     }
                 }
 
-                CheckBox {
+                CheckBox
+                {
                     id: legendModelCheckBox
                     checked: model.initialValue
-                    onClicked: {
+                    onClicked:
+                    {
                         UM.Preferences.setValue(model.preference, checked);
                     }
-                    Rectangle {
+                    Rectangle
+                    {
                         anchors.verticalCenter: parent.verticalCenter
                         anchors.right: legendModelCheckBox.right
                         width: UM.Theme.getSize("layerview_legend_size").width
@@ -320,18 +345,22 @@ Item
                 }
             }
 
-            CheckBox {
+            CheckBox
+            {
                 checked: viewSettings.only_show_top_layers
-                onClicked: {
+                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 {
+            CheckBox
+            {
                 checked: viewSettings.top_layer_count == 5
-                onClicked: {
+                onClicked:
+                {
                     UM.Preferences.setValue("view/top_layer_count", checked ? 5 : 1);
                 }
                 text: catalog.i18nc("@label", "Show 5 Detailed Layers On Top")
@@ -339,8 +368,10 @@ Item
                 style: UM.Theme.styles.checkbox
             }
 
-            Repeater {
+            Repeater
-                model: ListModel {
+            {
+                model: ListModel
+                {
                     id: typesLegendModelNoCheck
                     Component.onCompleted:
                     {
@@ -355,11 +386,13 @@ Item
                     }
                 }
 
-                Label {
+                Label
+                {
                     text: label
                     visible: viewSettings.show_legend
                     id: typesLegendModelLabel
-                    Rectangle {
+                    Rectangle
+                    {
                         anchors.verticalCenter: parent.verticalCenter
                         anchors.right: typesLegendModelLabel.right
                         width: UM.Theme.getSize("layerview_legend_size").width
@@ -378,30 +411,37 @@ Item
             }
 
             // Text for the minimum, maximum and units for the feedrates and layer thickness
-            Item {
+            Item
+            {
                 id: gradientLegend
                 visible: viewSettings.show_gradient
                 width: parent.width
                 height: UM.Theme.getSize("layerview_row").height
-                anchors {
+                anchors
+                {
                     topMargin: UM.Theme.getSize("slider_layerview_margin").height
                     horizontalCenter: parent.horizontalCenter
                 }
 
-                Label {
+                Label
+                {
                     text: minText()
                     anchors.left: parent.left
                     color: UM.Theme.getColor("setting_control_text")
                     font: UM.Theme.getFont("default")
 
-                    function minText() {
+                    function minText()
-                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity) {
+                    {
+                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity)
+                        {
                             // Feedrate selected
-                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2) {
+                            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) {
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3)
+                            {
                                 return parseFloat(UM.SimulationView.getMinThickness()).toFixed(2)
                             }
                         }
@@ -409,20 +449,25 @@ Item
                     }
                 }
 
-                Label {
+                Label
+                {
                     text: unitsText()
                     anchors.horizontalCenter: parent.horizontalCenter
                     color: UM.Theme.getColor("setting_control_text")
                     font: UM.Theme.getFont("default")
 
-                    function unitsText() {
+                    function unitsText()
-                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity) {
+                    {
+                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity)
+                        {
                             // Feedrate selected
-                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2) {
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2)
+                            {
                                 return "mm/s"
                             }
                             // Layer thickness selected
-                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3) {
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3)
+                            {
                                 return "mm"
                             }
                         }
@@ -430,20 +475,25 @@ Item
                     }
                 }
 
-                Label {
+                Label
+                {
                     text: maxText()
                     anchors.right: parent.right
                     color: UM.Theme.getColor("setting_control_text")
                     font: UM.Theme.getFont("default")
 
-                    function maxText() {
+                    function maxText()
-                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity) {
+                    {
+                        if (UM.SimulationView.layerActivity && CuraApplication.platformActivity)
+                        {
                             // Feedrate selected
-                            if (UM.Preferences.getValue("layerview/layer_view_type") == 2) {
+                            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) {
+                            if (UM.Preferences.getValue("layerview/layer_view_type") == 3)
+                            {
                                 return parseFloat(UM.SimulationView.getMaxThickness()).toFixed(2)
                             }
                         }
@@ -453,7 +503,8 @@ Item
             }
 
             // Gradient colors for feedrate
-            Rectangle { // In QML 5.9 can be changed by LinearGradient
+            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
@@ -463,20 +514,25 @@ Item
                 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 {
+                gradient: Gradient
-                    GradientStop {
+                {
+                    GradientStop
+                    {
                         position: 0.000
                         color: Qt.rgba(1, 0.5, 0, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 0.625
                         color: Qt.rgba(0.375, 0.5, 0, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 0.75
                         color: Qt.rgba(0.25, 1, 0, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 1.0
                         color: Qt.rgba(0, 0, 1, 1)
                     }
@@ -484,7 +540,8 @@ Item
             }
 
             // Gradient colors for layer thickness (similar to parula colormap)
-            Rectangle { // In QML 5.9 can be changed by LinearGradient
+            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
@@ -494,24 +551,30 @@ Item
                 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 {
+                gradient: Gradient
-                    GradientStop {
+                {
+                    GradientStop
+                    {
                         position: 0.000
                         color: Qt.rgba(1, 1, 0, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 0.25
                         color: Qt.rgba(1, 0.75, 0.25, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 0.5
                         color: Qt.rgba(0, 0.75, 0.5, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 0.75
                         color: Qt.rgba(0, 0.375, 0.75, 1)
                     }
-                    GradientStop {
+                    GradientStop
+                    {
                         position: 1.0
                         color: Qt.rgba(0, 0, 0.5, 1)
                     }
@@ -520,19 +583,22 @@ Item
         }
     }
 
-    Item {
+    Item
+    {
         id: slidersBox
 
         width: parent.width
         visible: UM.SimulationView.layerActivity && CuraApplication.platformActivity
 
-        anchors {
+        anchors
+        {
             top: parent.bottom
             topMargin: UM.Theme.getSize("slider_layerview_margin").height
             left: parent.left
         }
 
-        PathSlider {
+        PathSlider
+        {
             id: pathSlider
 
             height: UM.Theme.getSize("slider_handle").width
@@ -553,25 +619,37 @@ Item
             rangeColor: UM.Theme.getColor("slider_groove_fill")
 
             // update values when layer data changes
-            Connections {
+            Connections
+            {
                 target: UM.SimulationView
                 onMaxPathsChanged: pathSlider.setHandleValue(UM.SimulationView.currentPath)
-                onCurrentPathChanged: pathSlider.setHandleValue(UM.SimulationView.currentPath)
+                onCurrentPathChanged:
+                {
+                    // Only pause the simulation when the layer was changed manually, not when the simulation is running
+                    if (pathSlider.manuallyChanged)
+                    {
+                        playButton.pauseSimulation()
+                    }
+                    pathSlider.setHandleValue(UM.SimulationView.currentPath)
+                }
             }
 
             // make sure the slider handlers show the correct value after switching views
-            Component.onCompleted: {
+            Component.onCompleted:
+            {
                 pathSlider.setHandleValue(UM.SimulationView.currentPath)
             }
         }
 
-        LayerSlider {
+        LayerSlider
+        {
             id: layerSlider
 
             width: UM.Theme.getSize("slider_handle").width
             height: UM.Theme.getSize("layerview_menu_size").height
 
-            anchors {
+            anchors
+            {
                 top: !UM.SimulationView.compatibilityMode ? pathSlider.bottom : parent.top
                 topMargin: !UM.SimulationView.compatibilityMode ? UM.Theme.getSize("default_margin").height : 0
                 right: parent.right
@@ -593,56 +671,78 @@ Item
             handleLabelWidth: UM.Theme.getSize("slider_layerview_background").width
 
             // update values when layer data changes
-            Connections {
+            Connections
+            {
                 target: UM.SimulationView
                 onMaxLayersChanged: layerSlider.setUpperValue(UM.SimulationView.currentLayer)
                 onMinimumLayerChanged: layerSlider.setLowerValue(UM.SimulationView.minimumLayer)
-                onCurrentLayerChanged: layerSlider.setUpperValue(UM.SimulationView.currentLayer)
+                onCurrentLayerChanged:
+                {
+                    // Only pause the simulation when the layer was changed manually, not when the simulation is running
+                    if (layerSlider.manuallyChanged)
+                    {
+                        playButton.pauseSimulation()
+                    }
+                    layerSlider.setUpperValue(UM.SimulationView.currentLayer)
+                }
             }
 
             // make sure the slider handlers show the correct value after switching views
-            Component.onCompleted: {
+            Component.onCompleted:
+            {
                 layerSlider.setLowerValue(UM.SimulationView.minimumLayer)
                 layerSlider.setUpperValue(UM.SimulationView.currentLayer)
             }
         }
 
         // Play simulation button
-        Button {
+        Button
+        {
             id: playButton
             iconSource: "./resources/simulation_resume.svg"
             style: UM.Theme.styles.small_tool_button
             visible: !UM.SimulationView.compatibilityMode
-            anchors {
+            anchors
+            {
                 verticalCenter: pathSlider.verticalCenter
             }
 
             property var status: 0  // indicates if it's stopped (0) or playing (1)
 
-            onClicked: {
+            onClicked:
-                switch(status) {
+            {
-                    case 0: {
+                switch(status)
+                {
+                    case 0:
+                    {
                         resumeSimulation()
                         break
                     }
-                    case 1: {
+                    case 1:
+                    {
                         pauseSimulation()
                         break
                     }
                 }
             }
 
-            function pauseSimulation() {
+            function pauseSimulation()
+            {
                 UM.SimulationView.setSimulationRunning(false)
                 iconSource = "./resources/simulation_resume.svg"
                 simulationTimer.stop()
                 status = 0
+                layerSlider.manuallyChanged = true
+                pathSlider.manuallyChanged = true
             }
 
-            function resumeSimulation() {
+            function resumeSimulation()
+            {
                 UM.SimulationView.setSimulationRunning(true)
                 iconSource = "./resources/simulation_pause.svg"
                 simulationTimer.start()
+                layerSlider.manuallyChanged = false
+                pathSlider.manuallyChanged = false
             }
         }
 
@@ -652,7 +752,8 @@ Item
             interval: 100
             running: false
             repeat: true
-            onTriggered: {
+            onTriggered:
+            {
                 var currentPath = UM.SimulationView.currentPath
                 var numPaths = UM.SimulationView.numPaths
                 var currentLayer = UM.SimulationView.currentLayer
@@ -692,12 +793,15 @@ Item
                         UM.SimulationView.setCurrentPath(currentPath+1)
                     }
                 }
+                // The status must be set here instead of in the resumeSimulation function otherwise it won't work
+                // correctly, because part of the logic is in this trigger function.
                 playButton.status = 1
             }
         }
     }
 
-    FontMetrics {
+    FontMetrics
+    {
         id: fontMetrics
         font: UM.Theme.getFont("default")
     }

plugins/SimulationView/layers3d.shader

@@ -256,6 +256,7 @@ fragment41core =
     out vec4 frag_color;
 
     uniform mediump vec4 u_ambientColor;
+    uniform mediump vec4 u_minimumAlbedo;
     uniform highp vec3 u_lightPosition;
 
     void main()
@@ -263,7 +264,7 @@ fragment41core =
         mediump vec4 finalColor = vec4(0.0);
         float alpha = f_color.a;
 
-        finalColor.rgb += f_color.rgb * 0.3;
+        finalColor.rgb += f_color.rgb * 0.2 + u_minimumAlbedo.rgb;
 
         highp vec3 normal = normalize(f_normal);
         highp vec3 light_dir = normalize(u_lightPosition - f_vertex);
@@ -285,6 +286,7 @@ 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_minimumAlbedo = [0.1, 0.1, 0.1, 1.0]
 u_shininess = 20.0
 
 u_show_travel_moves = 0

plugins/SimulationView/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides the Simulation view.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/SliceInfoPlugin/SliceInfo.py

@@ -5,6 +5,7 @@ import json
 import os
 import platform
 import time
+from typing import cast, Optional, Set
 
 from PyQt5.QtCore import pyqtSlot, QObject
 
@@ -16,7 +17,7 @@ from UM.i18n import i18nCatalog
 from UM.Logger import Logger
 from UM.PluginRegistry import PluginRegistry
 from UM.Qt.Duration import DurationFormat
-from typing import cast, Optional
+
 from .SliceInfoJob import SliceInfoJob
 
 
@@ -95,13 +96,29 @@ class SliceInfo(QObject, Extension):
     def setSendSliceInfo(self, enabled: bool):
         Application.getInstance().getPreferences().setValue("info/send_slice_info", enabled)
 
+    def _getUserModifiedSettingKeys(self) -> list:
+        from cura.CuraApplication import CuraApplication
+        application = cast(CuraApplication, Application.getInstance())
+        machine_manager = application.getMachineManager()
+        global_stack = machine_manager.activeMachine
+
+        user_modified_setting_keys = set()  # type: Set[str]
+
+        for stack in [global_stack] + list(global_stack.extruders.values()):
+            # Get all settings in user_changes and quality_changes
+            all_keys = stack.userChanges.getAllKeys() | stack.qualityChanges.getAllKeys()
+            user_modified_setting_keys |= all_keys
+
+        return list(sorted(user_modified_setting_keys))
+
     def _onWriteStarted(self, output_device):
         try:
             if not Application.getInstance().getPreferences().getValue("info/send_slice_info"):
                 Logger.log("d", "'info/send_slice_info' is turned off.")
                 return  # Do nothing, user does not want to send data
 
-            application = Application.getInstance()
+            from cura.CuraApplication import CuraApplication
+            application = cast(CuraApplication, Application.getInstance())
             machine_manager = application.getMachineManager()
             print_information = application.getPrintInformation()
 
@@ -164,6 +181,8 @@ class SliceInfo(QObject, Extension):
 
             data["quality_profile"] = global_stack.quality.getMetaData().get("quality_type")
 
+            data["user_modified_setting_keys"] = self._getUserModifiedSettingKeys()
+
             data["models"] = []
             # Listing all files placed on the build plate
             for node in DepthFirstIterator(application.getController().getScene().getRoot()):

plugins/SliceInfoPlugin/example_data.json

@@ -56,6 +56,7 @@
         }
     ],
     "quality_profile": "fast",
+    "user_modified_setting_keys": ["layer_height", "wall_line_width", "infill_sparse_density"],
     "models": [
         {
             "hash": "b72789b9beb5366dff20b1cf501020c3d4d4df7dc2295ecd0fddd0a6436df070",

plugins/SliceInfoPlugin/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Submits anonymous slice info. Can be disabled through preferences.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }

plugins/SolidView/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.0",
     "description": "Provides a normal solid mesh view.",
-    "api": 4,
+    "api": 5,
     "i18n-catalog": "cura"
 }