Merge branch 'master' into feature_sync_button

cura/BuildVolume.py

@@ -111,6 +111,9 @@ class BuildVolume(SceneNode):
         # but it does not update the disallowed areas after material change
         Application.getInstance().getMachineManager().activeStackChanged.connect(self._onStackChanged)
 
+        # Enable and disable extruder
+        Application.getInstance().getMachineManager().extruderChanged.connect(self.updateNodeBoundaryCheck)
+
         # list of settings which were updated
         self._changed_settings_since_last_rebuild = []
 
@@ -217,30 +220,26 @@ class BuildVolume(SceneNode):
                 group_nodes.append(node)  # Keep list of affected group_nodes
 
             if node.callDecoration("isSliceable") or node.callDecoration("isGroup"):
-                node._outside_buildarea = False
-                bbox = node.getBoundingBox()
-
-                # Mark the node as outside the build volume if the bounding box test fails.
-                if build_volume_bounding_box.intersectsBox(bbox) != AxisAlignedBox.IntersectionResult.FullIntersection:
-                    node._outside_buildarea = True
+                if node.collidesWithBbox(build_volume_bounding_box):
+                    node.setOutsideBuildArea(True)
                     continue
 
-                convex_hull = node.callDecoration("getConvexHull")
-                if convex_hull:
-                    if not convex_hull.isValid():
-                        return
-                    # Check for collisions between disallowed areas and the object
-                    for area in self.getDisallowedAreas():
-                        overlap = convex_hull.intersectsPolygon(area)
-                        if overlap is None:
+                if node.collidesWithArea(self.getDisallowedAreas()):
+                    node.setOutsideBuildArea(True)
                     continue
-                        node._outside_buildarea = True
+
+                # Mark the node as outside build volume if the set extruder is disabled
+                extruder_position = node.callDecoration("getActiveExtruderPosition")
+                if not self._global_container_stack.extruders[extruder_position].isEnabled:
+                    node.setOutsideBuildArea(True)
                     continue
 
+                node.setOutsideBuildArea(False)
+
         # Group nodes should override the _outside_buildarea property of their children.
         for group_node in group_nodes:
             for child_node in group_node.getAllChildren():
-                child_node._outside_buildarea = group_node._outside_buildarea
+                child_node.setOutsideBuildArea(group_node.isOutsideBuildArea)
 
     ##  Update the outsideBuildArea of a single node, given bounds or current build volume
     def checkBoundsAndUpdate(self, node: CuraSceneNode, bounds: Optional[AxisAlignedBox] = None):
@@ -260,24 +259,20 @@ class BuildVolume(SceneNode):
             build_volume_bounding_box = bounds
 
         if node.callDecoration("isSliceable") or node.callDecoration("isGroup"):
-            bbox = node.getBoundingBox()
-
-            # Mark the node as outside the build volume if the bounding box test fails.
-            if build_volume_bounding_box.intersectsBox(bbox) != AxisAlignedBox.IntersectionResult.FullIntersection:
+            if node.collidesWithBbox(build_volume_bounding_box):
                 node.setOutsideBuildArea(True)
                 return
 
-            convex_hull = self.callDecoration("getConvexHull")
-            if convex_hull:
-                if not convex_hull.isValid():
-                    return
-                # Check for collisions between disallowed areas and the object
-                for area in self.getDisallowedAreas():
-                    overlap = convex_hull.intersectsPolygon(area)
-                    if overlap is None:
-                        continue
+            if node.collidesWithArea(self.getDisallowedAreas()):
                 node.setOutsideBuildArea(True)
                 return
+
+            # Mark the node as outside build volume if the set extruder is disabled
+            extruder_position = node.callDecoration("getActiveExtruderPosition")
+            if not self._global_container_stack.extruders[extruder_position].isEnabled:
+                node.setOutsideBuildArea(True)
+                return
+
             node.setOutsideBuildArea(False)
 
     ##  Recalculates the build volume & disallowed areas.

cura/CuraApplication.py

@@ -1605,6 +1605,8 @@ class CuraApplication(QtApplication):
                 fixed_nodes.append(node_)
         arranger = Arrange.create(fixed_nodes = fixed_nodes)
         min_offset = 8
+        default_extruder_position = self.getMachineManager().defaultExtruderPosition
+        default_extruder_id = self._global_container_stack.extruders[default_extruder_position].getId()
 
         for original_node in nodes:
 
@@ -1670,6 +1672,8 @@ class CuraApplication(QtApplication):
 
             op = AddSceneNodeOperation(node, scene.getRoot())
             op.push()
+
+            node.callDecoration("setActiveExtruder", default_extruder_id)
             scene.sceneChanged.emit(node)
 
         self.fileCompleted.emit(filename)

cura/Machines/MaterialGroup.py

@@ -1,9 +1,10 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
+from typing import List
+from cura.Machines.MaterialNode import MaterialNode #For type checking.
 
-#
-# A MaterialGroup represents a group of material InstanceContainers that are derived from a single material profile.
+## A MaterialGroup represents a group of material InstanceContainers that are derived from a single material profile.
 # The main InstanceContainer which has the ID of the material profile file name is called the "root_material". For
 # example: "generic_abs" is the root material (ID) of "generic_abs_ultimaker3" and "generic_abs_ultimaker3_AA_0.4",
 # and "generic_abs_ultimaker3" and "generic_abs_ultimaker3_AA_0.4" are derived materials of "generic_abs".
@@ -17,11 +18,11 @@
 class MaterialGroup:
     __slots__ = ("name", "is_read_only", "root_material_node", "derived_material_node_list")
 
-    def __init__(self, name: str):
+    def __init__(self, name: str, root_material_node: MaterialNode):
         self.name = name
         self.is_read_only = False
-        self.root_material_node = None
-        self.derived_material_node_list = []
+        self.root_material_node = root_material_node
+        self.derived_material_node_list = [] #type: List[MaterialNode]
 
     def __str__(self) -> str:
         return "%s[%s]" % (self.__class__.__name__, self.name)

cura/Machines/MaterialManager.py

@@ -72,30 +72,28 @@ class MaterialManager(QObject):
 
     def initialize(self):
         # Find all materials and put them in a matrix for quick search.
-        material_metadata_list = self._container_registry.findContainersMetadata(type = "material")
+        material_metadatas = {metadata["id"]: metadata for metadata in self._container_registry.findContainersMetadata(type = "material")}
 
         self._material_group_map = dict()
 
         # Map #1
         #    root_material_id -> MaterialGroup
-        for material_metadata in material_metadata_list:
-            material_id = material_metadata["id"]
+        for material_id, material_metadata in material_metadatas.items():
             # We don't store empty material in the lookup tables
             if material_id == "empty_material":
                 continue
 
             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)
+                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)
             group = self._material_group_map[root_material_id]
 
-            # We only add root materials here
-            if material_id == root_material_id:
-                group.root_material_node = MaterialNode(material_metadata)
-            else:
+            #Store this material in the group of the appropriate root material.
+            if material_id != root_material_id:
                 new_node = MaterialNode(material_metadata)
                 group.derived_material_node_list.append(new_node)
+
         # Order this map alphabetically so it's easier to navigate in a debugger
         self._material_group_map = OrderedDict(sorted(self._material_group_map.items(), key = lambda x: x[0]))
 
@@ -180,7 +178,7 @@ class MaterialManager(QObject):
         #    "machine" -> "variant_name" -> "root material ID" -> specific material InstanceContainer
         # Construct the "machine" -> "variant" -> "root material ID" -> specific material InstanceContainer
         self._diameter_machine_variant_material_map = dict()
-        for material_metadata in material_metadata_list:
+        for material_metadata in material_metadatas.values():
             # We don't store empty material in the lookup tables
             if material_metadata["id"] == "empty_material":
                 continue

cura/Machines/Models/BrandMaterialsModel.py

@@ -4,8 +4,8 @@
 from PyQt5.QtCore import Qt, pyqtSignal, pyqtProperty
 
 from UM.Qt.ListModel import ListModel
-
-from .BaseMaterialsModel import BaseMaterialsModel
+from UM.Logger import Logger
+from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
 
 
 #
@@ -54,9 +54,7 @@ class BrandMaterialsModel(ListModel):
         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 setExtruderPosition(self, position: int):
@@ -69,6 +67,7 @@ class BrandMaterialsModel(ListModel):
         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([])

cura/Machines/Models/BuildPlateModel.py

@@ -4,6 +4,7 @@
 from PyQt5.QtCore import Qt
 
 from UM.Application import Application
+from UM.Logger import Logger
 from UM.Qt.ListModel import ListModel
 from UM.Util import parseBool
 
@@ -29,6 +30,7 @@ class BuildPlateModel(ListModel):
         self._update()
 
     def _update(self):
+        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
         global_stack = self._machine_manager._global_container_stack
         if not global_stack:
             self.setItems([])

cura/Machines/Models/CustomQualityProfilesDropDownMenuModel.py

@@ -12,7 +12,7 @@ from cura.Machines.Models.QualityProfilesDropDownMenuModel import QualityProfile
 class CustomQualityProfilesDropDownMenuModel(QualityProfilesDropDownMenuModel):
 
     def _update(self):
-        Logger.log("d", "Updating %s ...", self.__class__.__name__)
+        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
 
         active_global_stack = self._machine_manager.activeMachine
         if active_global_stack is None:

cura/Machines/Models/GenericMaterialsModel.py

@@ -1,7 +1,8 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-from .BaseMaterialsModel import BaseMaterialsModel
+from UM.Logger import Logger
+from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel
 
 
 class GenericMaterialsModel(BaseMaterialsModel):
@@ -15,12 +16,12 @@ class GenericMaterialsModel(BaseMaterialsModel):
         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([])

cura/Machines/Models/MaterialManagementModel.py

@@ -1,8 +1,9 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-from PyQt5.QtCore import Qt, pyqtProperty
+from PyQt5.QtCore import Qt
 
+from UM.Logger import Logger
 from UM.Qt.ListModel import ListModel
 
 
@@ -60,6 +61,8 @@ class MaterialManagementModel(ListModel):
         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([])

cura/Machines/Models/NozzleModel.py

@@ -4,6 +4,7 @@
 from PyQt5.QtCore import Qt
 
 from UM.Application import Application
+from UM.Logger import Logger
 from UM.Qt.ListModel import ListModel
 from UM.Util import parseBool
 
@@ -20,26 +21,30 @@ class NozzleModel(ListModel):
         self.addRoleName(self.HotendNameRole, "hotend_name")
         self.addRoleName(self.ContainerNodeRole, "container_node")
 
-        Application.getInstance().globalContainerStackChanged.connect(self._update)
-        Application.getInstance().getMachineManager().activeVariantChanged.connect(self._update)
-        Application.getInstance().getMachineManager().activeStackChanged.connect(self._update)
-        Application.getInstance().getMachineManager().activeMaterialChanged.connect(self._update)
+        self._application = Application.getInstance()
+        self._machine_manager = self._application.getMachineManager()
+        self._variant_manager = self._application.getVariantManager()
+
+        self._machine_manager.globalContainerChanged.connect(self._update)
+        self._update()
 
     def _update(self):
+        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
+
         self.items.clear()
 
-        variant_manager = Application.getInstance()._variant_manager
-        active_global_stack = Application.getInstance().getMachineManager()._global_container_stack
-        if active_global_stack is None:
+        global_stack = self._machine_manager.activeMachine
+        if global_stack is None:
             self.setItems([])
             return
 
-        has_variants = parseBool(active_global_stack.getMetaDataEntry("has_variants", False))
+        has_variants = parseBool(global_stack.getMetaDataEntry("has_variants", False))
         if not has_variants:
             self.setItems([])
             return
 
-        variant_node_dict = variant_manager.getVariantNodes(active_global_stack)
+        from cura.Machines.VariantManager import VariantType
+        variant_node_dict = self._variant_manager.getVariantNodes(global_stack, VariantType.NOZZLE)
         if not variant_node_dict:
             self.setItems([])
             return

cura/Machines/Models/QualityManagementModel.py

@@ -4,7 +4,7 @@
 from PyQt5.QtCore import Qt, pyqtSlot
 
 from UM.Qt.ListModel import ListModel
-
+from UM.Logger import Logger
 
 #
 # This the QML model for the quality management page.
@@ -35,6 +35,8 @@ class QualityManagementModel(ListModel):
         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
 
         quality_group_dict = self._quality_manager.getQualityGroups(global_stack)

cura/Machines/Models/QualityProfilesDropDownMenuModel.py

@@ -29,7 +29,7 @@ class QualityProfilesDropDownMenuModel(ListModel):
         self.addRoleName(self.QualityTypeRole, "quality_type")
         self.addRoleName(self.LayerHeightRole, "layer_height")
         self.addRoleName(self.LayerHeightUnitRole, "layer_height_unit")
-        self.addRoleName(self.AvailableRole, "available")
+        self.addRoleName(self.AvailableRole, "available") #Whether the quality profile is available in our current nozzle + material.
         self.addRoleName(self.QualityGroupRole, "quality_group")
         self.addRoleName(self.QualityChangesGroupRole, "quality_changes_group")
 
@@ -39,6 +39,7 @@ class QualityProfilesDropDownMenuModel(ListModel):
 
         self._application.globalContainerStackChanged.connect(self._update)
         self._machine_manager.activeQualityGroupChanged.connect(self._update)
+        self._machine_manager.extruderChanged.connect(self._update)
         self._quality_manager.qualitiesUpdated.connect(self._update)
 
         self._layer_height_unit = ""  # This is cached
@@ -46,7 +47,7 @@ class QualityProfilesDropDownMenuModel(ListModel):
         self._update()
 
     def _update(self):
-        Logger.log("d", "Updating quality profile model ...")
+        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:

cura/Machines/Models/QualitySettingsModel.py

@@ -21,6 +21,8 @@ class QualitySettingsModel(ListModel):
     UserValueRole = Qt.UserRole + 6
     CategoryRole = Qt.UserRole + 7
 
+    GLOBAL_STACK_POSITION = -1
+
     def __init__(self, parent = None):
         super().__init__(parent = parent)
 
@@ -36,8 +38,7 @@ class QualitySettingsModel(ListModel):
         self._application = Application.getInstance()
         self._quality_manager = self._application.getQualityManager()
 
-        self._selected_position = ""  # empty string means GlobalStack
-                                      # strings such as "0", "1", etc. mean extruder positions
+        self._selected_position = self.GLOBAL_STACK_POSITION #Must be either GLOBAL_STACK_POSITION or an extruder position (0, 1, etc.)
         self._selected_quality_item = None  # The selected quality in the quality management page
         self._i18n_catalog = None
 
@@ -54,7 +55,7 @@ class QualitySettingsModel(ListModel):
             self.selectedPositionChanged.emit()
             self._update()
 
-    @pyqtProperty(str, fset = setSelectedPosition, notify = selectedPositionChanged)
+    @pyqtProperty(int, fset = setSelectedPosition, notify = selectedPositionChanged)
     def selectedPosition(self):
         return self._selected_position
 
@@ -69,6 +70,8 @@ class QualitySettingsModel(ListModel):
         return self._selected_quality_item
 
     def _update(self):
+        Logger.log("d", "Updating {model_class_name}.".format(model_class_name = self.__class__.__name__))
+
         if not self._selected_quality_item:
             self.setItems([])
             return
@@ -81,7 +84,7 @@ class QualitySettingsModel(ListModel):
         quality_group = self._selected_quality_item["quality_group"]
         quality_changes_group = self._selected_quality_item["quality_changes_group"]
 
-        if self._selected_position == "":
+        if self._selected_position == self.GLOBAL_STACK_POSITION:
             quality_node = quality_group.node_for_global
         else:
             quality_node = quality_group.nodes_for_extruders.get(self._selected_position)
@@ -91,14 +94,14 @@ class QualitySettingsModel(ListModel):
         # Here, if the user has selected a quality changes, then "quality_changes_group" will not be None, and we fetch
         # the settings in that quality_changes_group.
         if quality_changes_group is not None:
-            if self._selected_position == "":
+            if self._selected_position == self.GLOBAL_STACK_POSITION:
                 quality_changes_node = quality_changes_group.node_for_global
             else:
                 quality_changes_node = quality_changes_group.nodes_for_extruders.get(self._selected_position)
             if quality_changes_node is not None:  # it can be None if number of extruders are changed during runtime
                 try:
                     quality_containers.insert(0, quality_changes_node.getContainer())
-                except:
+                except RuntimeError:
                     # FIXME: This is to prevent incomplete update of QualityManager
                     Logger.logException("d", "Failed to get container for quality changes node %s", quality_changes_node)
                     return
@@ -125,7 +128,7 @@ class QualitySettingsModel(ListModel):
                     profile_value = new_value
 
                 # Global tab should use resolve (if there is one)
-                if self._selected_position == "":
+                if self._selected_position == self.GLOBAL_STACK_POSITION:
                     resolve_value = global_container_stack.getProperty(definition.key, "resolve")
                     if resolve_value is not None and definition.key in settings_keys:
                         profile_value = resolve_value
@@ -133,10 +136,10 @@ class QualitySettingsModel(ListModel):
                 if profile_value is not None:
                     break
 
-            if not self._selected_position:
+            if self._selected_position == self.GLOBAL_STACK_POSITION:
                 user_value = global_container_stack.userChanges.getProperty(definition.key, "value")
             else:
-                extruder_stack = global_container_stack.extruders[self._selected_position]
+                extruder_stack = global_container_stack.extruders[str(self._selected_position)]
                 user_value = extruder_stack.userChanges.getProperty(definition.key, "value")
 
             if profile_value is None and user_value is None:

cura/Machines/QualityGroup.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, List
+from typing import Dict, Optional, List
 
 from PyQt5.QtCore import QObject, pyqtSlot
 
@@ -25,7 +25,7 @@ class QualityGroup(QObject):
         super().__init__(parent)
         self.name = name
         self.node_for_global = None  # type: Optional["QualityGroup"]
-        self.nodes_for_extruders = dict()  # position str -> QualityGroup
+        self.nodes_for_extruders = {}  # type: Dict[int, "QualityGroup"]
         self.quality_type = quality_type
         self.is_available = False
 

cura/Machines/QualityManager.py

@@ -159,8 +159,8 @@ class QualityManager(QObject):
     # Updates the given quality groups' availabilities according to which extruders are being used/ enabled.
     def _updateQualityGroupsAvailability(self, machine: "GlobalStack", quality_group_list):
         used_extruders = set()
-        # TODO: This will change after the Machine refactoring
         for i in range(machine.getProperty("machine_extruder_count", "value")):
+            if machine.extruders[str(i)].isEnabled:
                 used_extruders.add(str(i))
 
         # Update the "is_available" flag for each quality group.
@@ -386,7 +386,7 @@ class QualityManager(QObject):
         if quality_changes_group is None:
             # create global quality changes only
             new_quality_changes = self._createQualityChanges(quality_group.quality_type, quality_changes_name,
-                                                             global_stack, extruder_id = None)
+                                                             global_stack, None)
             self._container_registry.addContainer(new_quality_changes)
         else:
             new_name = self._container_registry.uniqueName(quality_changes_name)

cura/Machines/VariantManager.py

@@ -104,11 +104,19 @@ class VariantManager:
     # Almost the same as getVariantMetadata() except that this returns an InstanceContainer if present.
     #
     def getVariantNode(self, machine_definition_id: str, variant_name: str,
-                       variant_type: Optional["VariantType"] = VariantType.NOZZLE) -> Optional["ContainerNode"]:
+                       variant_type: Optional["VariantType"] = None) -> Optional["ContainerNode"]:
+        if variant_type is None:
+            variant_node = None
+            variant_type_dict = self._machine_to_variant_dict_map[machine_definition_id]
+            for variant_dict in variant_type_dict.values():
+                if variant_name in variant_dict:
+                    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",
-                        variant_type: Optional["VariantType"] = VariantType.NOZZLE) -> dict:
+                        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/Scene/CuraSceneNode.py

@@ -1,9 +1,13 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from copy import deepcopy
 from typing import List
 
 from UM.Application import Application
+from UM.Math.AxisAlignedBox import AxisAlignedBox
 from UM.Scene.SceneNode import SceneNode
-from copy import deepcopy
-from cura.Settings.ExtrudersModel import ExtrudersModel
+
+from cura.Settings.SettingOverrideDecorator import SettingOverrideDecorator
 
 
 ##  Scene nodes that are models are only seen when selecting the corresponding build plate
@@ -11,6 +15,8 @@ from cura.Settings.ExtrudersModel import ExtrudersModel
 class CuraSceneNode(SceneNode):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
+        if "no_setting_override" not in kwargs:
+            self.addDecorator(SettingOverrideDecorator())  # now we always have a getActiveExtruderPosition, unless explicitly disabled
         self._outside_buildarea = False
 
     def setOutsideBuildArea(self, new_value):
@@ -72,9 +78,34 @@ class CuraSceneNode(SceneNode):
             1.0
         ]
 
+    ##  Return if the provided bbox collides with the bbox of this scene node
+    def collidesWithBbox(self, check_bbox):
+        bbox = self.getBoundingBox()
+
+        # Mark the node as outside the build volume if the bounding box test fails.
+        if check_bbox.intersectsBox(bbox) != AxisAlignedBox.IntersectionResult.FullIntersection:
+            return True
+
+        return False
+
+    ##  Return if any area collides with the convex hull of this scene node
+    def collidesWithArea(self, areas):
+        convex_hull = self.callDecoration("getConvexHull")
+        if convex_hull:
+            if not convex_hull.isValid():
+                return False
+
+            # Check for collisions between disallowed areas and the object
+            for area in areas:
+                overlap = convex_hull.intersectsPolygon(area)
+                if overlap is None:
+                    continue
+                return True
+        return False
+
     ##  Taken from SceneNode, but replaced SceneNode with CuraSceneNode
     def __deepcopy__(self, memo):
-        copy = CuraSceneNode()
+        copy = CuraSceneNode(no_setting_override = True)  # Setting override will be added later
         copy.setTransformation(self.getLocalTransformation())
         copy.setMeshData(self._mesh_data)
         copy.setVisible(deepcopy(self._visible, memo))

cura/Settings/ContainerManager.py

@@ -334,10 +334,13 @@ class ContainerManager(QObject):
 
         # Go through global and extruder stacks and clear their topmost container (the user settings).
         for stack in ExtruderManager.getInstance().getActiveGlobalAndExtruderStacks():
-            container = stack.getTop()
+            container = stack.userChanges
             container.clear()
             send_emits_containers.append(container)
 
+        # user changes are possibly added to make the current setup match the current enabled extruders
+        Application.getInstance().getMachineManager().correctExtruderSettings()
+
         for container in send_emits_containers:
             container.sendPostponedEmits()
 

cura/Settings/CuraContainerRegistry.py

@@ -241,7 +241,7 @@ class CuraContainerRegistry(ContainerRegistry):
                         profile.addMetaDataEntry("type", "quality_changes")
                         profile.addMetaDataEntry("definition", global_profile.getMetaDataEntry("definition"))
                         profile.addMetaDataEntry("quality_type", global_profile.getMetaDataEntry("quality_type"))
-                        profile.addMetaDataEntry("extruder", extruder.getId())
+                        profile.addMetaDataEntry("position", "0")
                         profile.setDirty(True)
                         if idx == 0:
                             # move all per-extruder settings to the first extruder's quality_changes
@@ -273,10 +273,11 @@ class CuraContainerRegistry(ContainerRegistry):
                     elif profile_index < len(machine_extruders) + 1:
                         # This is assumed to be an extruder profile
                         extruder_id = machine_extruders[profile_index - 1].definition.getId()
-                        if not profile.getMetaDataEntry("extruder"):
-                            profile.addMetaDataEntry("extruder", extruder_id)
+                        extruder_position = str(profile_index - 1)
+                        if not profile.getMetaDataEntry("position"):
+                            profile.addMetaDataEntry("position", extruder_position)
                         else:
-                            profile.setMetaDataEntry("extruder", extruder_id)
+                            profile.setMetaDataEntry("position", extruder_position)
                         profile_id = (extruder_id + "_" + name_seed).lower().replace(" ", "_")
 
                     else: #More extruders in the imported file than in the machine.

cura/Settings/ExtruderManager.py

@@ -241,6 +241,13 @@ class ExtruderManager(QObject):
             result.append(extruder_stack.getProperty(setting_key, prop))
         return result
 
+    def extruderValueWithDefault(self, value):
+        machine_manager = self._application.getMachineManager()
+        if value == "-1":
+            return machine_manager.defaultExtruderPosition
+        else:
+            return value
+
     ##  Gets the extruder stacks that are actually being used at the moment.
     #
     #   An extruder stack is being used if it is the extruder to print any mesh
@@ -252,7 +259,7 @@ class ExtruderManager(QObject):
     #
     #   \return A list of extruder stacks.
     def getUsedExtruderStacks(self) -> List["ContainerStack"]:
-        global_stack = Application.getInstance().getGlobalContainerStack()
+        global_stack = self._application.getGlobalContainerStack()
         container_registry = ContainerRegistry.getInstance()
 
         used_extruder_stack_ids = set()
@@ -302,16 +309,19 @@ class ExtruderManager(QObject):
 
         # Check support extruders
         if support_enabled:
-            used_extruder_stack_ids.add(self.extruderIds[str(global_stack.getProperty("support_infill_extruder_nr", "value"))])
-            used_extruder_stack_ids.add(self.extruderIds[str(global_stack.getProperty("support_extruder_nr_layer_0", "value"))])
+            used_extruder_stack_ids.add(self.extruderIds[self.extruderValueWithDefault(str(global_stack.getProperty("support_infill_extruder_nr", "value")))])
+            used_extruder_stack_ids.add(self.extruderIds[self.extruderValueWithDefault(str(global_stack.getProperty("support_extruder_nr_layer_0", "value")))])
             if support_bottom_enabled:
-                used_extruder_stack_ids.add(self.extruderIds[str(global_stack.getProperty("support_bottom_extruder_nr", "value"))])
+                used_extruder_stack_ids.add(self.extruderIds[self.extruderValueWithDefault(str(global_stack.getProperty("support_bottom_extruder_nr", "value")))])
             if support_roof_enabled:
-                used_extruder_stack_ids.add(self.extruderIds[str(global_stack.getProperty("support_roof_extruder_nr", "value"))])
+                used_extruder_stack_ids.add(self.extruderIds[self.extruderValueWithDefault(str(global_stack.getProperty("support_roof_extruder_nr", "value")))])
 
         # The platform adhesion extruder. Not used if using none.
         if global_stack.getProperty("adhesion_type", "value") != "none":
-            used_extruder_stack_ids.add(self.extruderIds[str(global_stack.getProperty("adhesion_extruder_nr", "value"))])
+            extruder_nr = str(global_stack.getProperty("adhesion_extruder_nr", "value"))
+            if extruder_nr == "-1":
+                extruder_nr = Application.getInstance().getMachineManager().defaultExtruderPosition
+            used_extruder_stack_ids.add(self.extruderIds[extruder_nr])
 
         try:
             return [container_registry.findContainerStacks(id = stack_id)[0] for stack_id in used_extruder_stack_ids]
@@ -485,6 +495,8 @@ class ExtruderManager(QObject):
 
         result = []
         for extruder in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
+            if not extruder.isEnabled:
+                continue
             # 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"):
                 continue

cura/Settings/ExtruderStack.py

@@ -3,13 +3,14 @@
 
 from typing import Any, TYPE_CHECKING, Optional
 
-from PyQt5.QtCore import pyqtProperty
+from PyQt5.QtCore import pyqtProperty, pyqtSignal
 
 from UM.Decorators import override
 from UM.MimeTypeDatabase import MimeType, MimeTypeDatabase
 from UM.Settings.ContainerStack import ContainerStack
 from UM.Settings.ContainerRegistry import ContainerRegistry
 from UM.Settings.Interfaces import ContainerInterface, PropertyEvaluationContext
+from UM.Util import parseBool
 
 from . import Exceptions
 from .CuraContainerStack import CuraContainerStack, _ContainerIndexes
@@ -30,6 +31,8 @@ class ExtruderStack(CuraContainerStack):
 
         self.propertiesChanged.connect(self._onPropertiesChanged)
 
+    enabledChanged = pyqtSignal()
+
     ##  Overridden from ContainerStack
     #
     #   This will set the next stack and ensure that we register this stack as an extruder.
@@ -46,6 +49,16 @@ class ExtruderStack(CuraContainerStack):
     def getNextStack(self) -> Optional["GlobalStack"]:
         return super().getNextStack()
 
+    def setEnabled(self, enabled):
+        if "enabled" not in self._metadata:
+            self.addMetaDataEntry("enabled", "True")
+        self.setMetaDataEntry("enabled", str(enabled))
+        self.enabledChanged.emit()
+
+    @pyqtProperty(bool, notify = enabledChanged)
+    def isEnabled(self):
+        return parseBool(self.getMetaDataEntry("enabled", "True"))
+
     @classmethod
     def getLoadingPriority(cls) -> int:
         return 3

cura/Settings/ExtrudersModel.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2017 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-from PyQt5.QtCore import Qt, pyqtSignal, pyqtProperty, QTimer
+from PyQt5.QtCore import Qt, pyqtSignal, pyqtSlot, pyqtProperty, QTimer
 from typing import Iterable
 
 from UM.i18n import i18nCatalog
@@ -24,6 +24,8 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
 
     ##  Human-readable name of the extruder.
     NameRole = Qt.UserRole + 2
+    ##  Is the extruder enabled?
+    EnabledRole = Qt.UserRole + 9
 
     ##  Colour of the material loaded in the extruder.
     ColorRole = Qt.UserRole + 3
@@ -43,6 +45,7 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
 
     # The variant of the extruder.
     VariantRole = Qt.UserRole + 7
+    StackRole = Qt.UserRole + 8
 
     ##  List of colours to display if there is no material or the material has no known
     #   colour.
@@ -57,11 +60,13 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
 
         self.addRoleName(self.IdRole, "id")
         self.addRoleName(self.NameRole, "name")
+        self.addRoleName(self.EnabledRole, "enabled")
         self.addRoleName(self.ColorRole, "color")
         self.addRoleName(self.IndexRole, "index")
         self.addRoleName(self.DefinitionRole, "definition")
         self.addRoleName(self.MaterialRole, "material")
         self.addRoleName(self.VariantRole, "variant")
+        self.addRoleName(self.StackRole, "stack")
 
         self._update_extruder_timer = QTimer()
         self._update_extruder_timer.setInterval(100)
@@ -183,11 +188,13 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
                 item = {
                     "id": extruder.getId(),
                     "name": extruder.getName(),
+                    "enabled": extruder.isEnabled,
                     "color": color,
                     "index": position,
                     "definition": extruder.getBottom().getId(),
                     "material": extruder.material.getName() if extruder.material else "",
                     "variant": extruder.variant.getName() if extruder.variant else "",  # e.g. print core
+                    "stack": extruder,
                 }
 
                 items.append(item)

cura/Settings/MachineManager.py

@@ -54,6 +54,8 @@ class MachineManager(QObject):
         self._current_quality_group = None
         self._current_quality_changes_group = None
 
+        self._default_extruder_position = "0"  # to be updated when extruders are switched on and off
+
         self.machine_extruder_material_update_dict = collections.defaultdict(list)
 
         self._error_check_timer = QTimer()
@@ -132,6 +134,7 @@ class MachineManager(QObject):
         # When the materials lookup table gets updated, it can mean that a material has its name changed, which should
         # be reflected on the GUI. This signal emission makes sure that it happens.
         self._material_manager.materialsUpdated.connect(self.rootMaterialChanged)
+        self.rootMaterialChanged.connect(self._onRootMaterialChanged)
 
     activeQualityGroupChanged = pyqtSignal()
     activeQualityChangesGroupChanged = pyqtSignal()
@@ -141,6 +144,7 @@ class MachineManager(QObject):
     activeVariantChanged = pyqtSignal()
     activeQualityChanged = pyqtSignal()
     activeStackChanged = pyqtSignal()  # Emitted whenever the active stack is changed (ie: when changing between extruders, changing a profile, but not when changing a value)
+    extruderChanged = pyqtSignal()
 
     globalValueChanged = pyqtSignal()  # Emitted whenever a value inside global container is changed.
     activeStackValueChanged = pyqtSignal()  # Emitted whenever a value inside the active stack is changed.
@@ -232,7 +236,9 @@ class MachineManager(QObject):
 
         # Update the local global container stack reference
         self._global_container_stack = Application.getInstance().getGlobalContainerStack()
-
+        if self._global_container_stack:
+            self.updateDefaultExtruder()
+            self.updateNumberExtrudersEnabled()
         self.globalContainerChanged.emit()
 
         # after switching the global stack we reconnect all the signals and set the variant and material references
@@ -385,7 +391,7 @@ class MachineManager(QObject):
             return False
 
         if self._global_container_stack.hasErrors():
-            Logger.log("d", "Checking global stack for errors took %0.2f s and we found and error" % (time.time() - time_start))
+            Logger.log("d", "Checking global stack for errors took %0.2f s and we found an error" % (time.time() - time_start))
             return True
 
         # Not a very pretty solution, but the extruder manager doesn't really know how many extruders there are
@@ -715,6 +721,8 @@ class MachineManager(QObject):
         buildplate_compatible = True  # It is compatible by default
         extruder_stacks = self._global_container_stack.extruders.values()
         for stack in extruder_stacks:
+            if not stack.isEnabled:
+                continue
             material_container = stack.material
             if material_container == self._empty_material_container:
                 continue
@@ -772,6 +780,43 @@ class MachineManager(QObject):
         if containers:
             return containers[0].definition.getId()
 
+    def getIncompatibleSettingsOnEnabledExtruders(self, container):
+        extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
+        result = []
+        for setting_instance in container.findInstances():
+            setting_key = setting_instance.definition.key
+            setting_enabled = self._global_container_stack.getProperty(setting_key, "enabled")
+            if not setting_enabled:
+                # A setting is not visible anymore
+                result.append(setting_key)
+                Logger.log("d", "Reset setting [%s] from [%s] because the setting is no longer enabled", setting_key, container)
+                continue
+
+            if not self._global_container_stack.getProperty(setting_key, "type") in ("extruder", "optional_extruder"):
+                continue
+
+            old_value = container.getProperty(setting_key, "value")
+            if int(old_value) >= extruder_count or not self._global_container_stack.extruders[str(old_value)].isEnabled:
+                result.append(setting_key)
+                Logger.log("d", "Reset setting [%s] in [%s] because its old value [%s] is no longer valid", setting_key, container, old_value)
+        return result
+
+    ##  Update extruder number to a valid value when the number of extruders are changed, or when an extruder is changed
+    def correctExtruderSettings(self):
+        for setting_key in self.getIncompatibleSettingsOnEnabledExtruders(self._global_container_stack.userChanges):
+            self._global_container_stack.userChanges.removeInstance(setting_key)
+        add_user_changes = self.getIncompatibleSettingsOnEnabledExtruders(self._global_container_stack.qualityChanges)
+        for setting_key in add_user_changes:
+            # Apply quality changes that are incompatible to user changes, so we do not change the quality changes itself.
+            self._global_container_stack.userChanges.setProperty(setting_key, "value", self._default_extruder_position)
+        if add_user_changes:
+            caution_message = Message(catalog.i18nc(
+                "@info:generic",
+                "Settings have been changed to match the current availability of extruders: [%s]" % ", ".join(add_user_changes)),
+                lifetime=0,
+                title = catalog.i18nc("@info:title", "Settings updated"))
+            caution_message.show()
+
     ##  Set the amount of extruders on the active machine (global stack)
     #   \param extruder_count int the number of extruders to set
     def setActiveMachineExtruderCount(self, extruder_count):
@@ -785,16 +830,11 @@ class MachineManager(QObject):
         if extruder_count == previous_extruder_count:
             return
 
-        # reset all extruder number settings whose value is no longer valid
-        for setting_instance in self._global_container_stack.userChanges.findInstances():
-            setting_key = setting_instance.definition.key
-            if not self._global_container_stack.getProperty(setting_key, "type") in ("extruder", "optional_extruder"):
-                continue
+        definition_changes_container.setProperty("machine_extruder_count", "value", extruder_count)
 
-            old_value = int(self._global_container_stack.userChanges.getProperty(setting_key, "value"))
-            if old_value >= extruder_count:
-                self._global_container_stack.userChanges.removeInstance(setting_key)
-                Logger.log("d", "Reset [%s] because its old value [%s] is no longer valid ", setting_key, old_value)
+        self.updateDefaultExtruder()
+        self.updateNumberExtrudersEnabled()
+        self.correctExtruderSettings()
 
         # Check to see if any objects are set to print with an extruder that will no longer exist
         root_node = Application.getInstance().getController().getScene().getRoot()
@@ -805,21 +845,19 @@ class MachineManager(QObject):
                 if extruder_nr is not None and int(extruder_nr) > extruder_count - 1:
                     node.callDecoration("setActiveExtruder", extruder_manager.getExtruderStack(extruder_count - 1).getId())
 
-        definition_changes_container.setProperty("machine_extruder_count", "value", extruder_count)
-
         # Make sure one of the extruder stacks is active
         extruder_manager.setActiveExtruderIndex(0)
 
         # Move settable_per_extruder values out of the global container
         # After CURA-4482 this should not be the case anymore, but we still want to support older project files.
-        global_user_container = self._global_container_stack.getTop()
+        global_user_container = self._global_container_stack.userChanges
 
         # Make sure extruder_stacks exists
         extruder_stacks = []
 
         if previous_extruder_count == 1:
             extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
-            global_user_container = self._global_container_stack.getTop()
+            global_user_container = self._global_container_stack.userChanges
 
         for setting_instance in global_user_container.findInstances():
             setting_key = setting_instance.definition.key
@@ -828,11 +866,12 @@ class MachineManager(QObject):
             if settable_per_extruder:
                 limit_to_extruder = int(self._global_container_stack.getProperty(setting_key, "limit_to_extruder"))
                 extruder_stack = extruder_stacks[max(0, limit_to_extruder)]
-                extruder_stack.getTop().setProperty(setting_key, "value", global_user_container.getProperty(setting_key, "value"))
+                extruder_stack.userChanges.setProperty(setting_key, "value", global_user_container.getProperty(setting_key, "value"))
                 global_user_container.removeInstance(setting_key)
 
         # Signal that the global stack has changed
         Application.getInstance().globalContainerStackChanged.emit()
+        self.forceUpdateAllSettings()
 
     @pyqtSlot(int, result = QObject)
     def getExtruder(self, position: int):
@@ -841,6 +880,53 @@ class MachineManager(QObject):
             extruder = self._global_container_stack.extruders.get(str(position))
         return extruder
 
+    def updateDefaultExtruder(self):
+        extruder_items = sorted(self._global_container_stack.extruders.items())
+        old_position = self._default_extruder_position
+        new_default_position = "0"
+        for position, extruder in extruder_items:
+            if extruder.isEnabled:
+                new_default_position = position
+                break
+        if new_default_position != old_position:
+            self._default_extruder_position = new_default_position
+            self.extruderChanged.emit()
+
+    def updateNumberExtrudersEnabled(self):
+        definition_changes_container = self._global_container_stack.definitionChanges
+        extruder_count = 0
+        for position, extruder in self._global_container_stack.extruders.items():
+            if extruder.isEnabled:
+                extruder_count += 1
+        definition_changes_container.setProperty("extruders_enabled_count", "value", extruder_count)
+
+    @pyqtProperty(str, notify = extruderChanged)
+    def defaultExtruderPosition(self):
+        return self._default_extruder_position
+
+    ##  This will fire the propertiesChanged for all settings so they will be updated in the front-end
+    def forceUpdateAllSettings(self):
+        property_names = ["value", "resolve"]
+        for setting_key in self._global_container_stack.getAllKeys():
+            self._global_container_stack.propertiesChanged.emit(setting_key, property_names)
+
+    @pyqtSlot(int, bool)
+    def setExtruderEnabled(self, position: int, enabled) -> None:
+        extruder = self.getExtruder(position)
+        extruder.setEnabled(enabled)
+        self.updateDefaultExtruder()
+        self.updateNumberExtrudersEnabled()
+        self.correctExtruderSettings()
+        # ensure that the quality profile is compatible with current combination, or choose a compatible one if available
+        self._updateQualityWithMaterial()
+        self.extruderChanged.emit()
+        # update material compatibility color
+        self.activeQualityGroupChanged.emit()
+        # update items in SettingExtruder
+        ExtruderManager.getInstance().extrudersChanged.emit(self._global_container_stack.getId())
+        # Make sure the front end reflects changes
+        self.forceUpdateAllSettings()
+
     def _onMachineNameChanged(self):
         self.globalContainerChanged.emit()
 
@@ -861,27 +947,32 @@ class MachineManager(QObject):
             container = extruder.userChanges
             container.setProperty(setting_name, property_name, property_value)
 
-    @pyqtProperty("QVariantList", notify = rootMaterialChanged)
+    @pyqtProperty("QVariantList", notify = globalContainerChanged)
     def currentExtruderPositions(self):
-        return sorted(list(self._current_root_material_id.keys()))
+        if self._global_container_stack is None:
+            return []
+        return sorted(list(self._global_container_stack.extruders.keys()))
 
-    @pyqtProperty("QVariant", notify = rootMaterialChanged)
-    def currentRootMaterialId(self):
-        # initial filling the current_root_material_id
+    ##  Update _current_root_material_id and _current_root_material_name when
+    #   the current root material was changed.
+    def _onRootMaterialChanged(self):
         self._current_root_material_id = {}
+
+        if self._global_container_stack:
             for position in self._global_container_stack.extruders:
                 self._current_root_material_id[position] = self._global_container_stack.extruders[position].material.getMetaDataEntry("base_file")
-        return self._current_root_material_id
-
-    @pyqtProperty("QVariant", notify = rootMaterialChanged)
-    def currentRootMaterialName(self):
-        # initial filling the current_root_material_name
-        if self._global_container_stack:
             self._current_root_material_name = {}
             for position in self._global_container_stack.extruders:
                 if position not in self._current_root_material_name:
                     material = self._global_container_stack.extruders[position].material
                     self._current_root_material_name[position] = material.getName()
+
+    @pyqtProperty("QVariant", notify = rootMaterialChanged)
+    def currentRootMaterialId(self):
+        return self._current_root_material_id
+
+    @pyqtProperty("QVariant", notify = rootMaterialChanged)
+    def currentRootMaterialName(self):
         return self._current_root_material_name
 
     ##  Return the variant names in the extruder stack(s).
@@ -928,9 +1019,9 @@ class MachineManager(QObject):
 
         # Set quality and quality_changes for each ExtruderStack
         for position, node in quality_group.nodes_for_extruders.items():
-            self._global_container_stack.extruders[position].quality = node.getContainer()
+            self._global_container_stack.extruders[str(position)].quality = node.getContainer()
             if empty_quality_changes:
-                self._global_container_stack.extruders[position].qualityChanges = self._empty_quality_changes_container
+                self._global_container_stack.extruders[str(position)].qualityChanges = self._empty_quality_changes_container
 
         self.activeQualityGroupChanged.emit()
         self.activeQualityChangesGroupChanged.emit()
@@ -995,6 +1086,8 @@ class MachineManager(QObject):
         # check material - variant compatibility
         if Util.parseBool(self._global_container_stack.getMetaDataEntry("has_materials", False)):
             for position, extruder in self._global_container_stack.extruders.items():
+                if extruder.isEnabled and not extruder.material.getMetaDataEntry("compatible"):
+                    return False
                 if not extruder.material.getMetaDataEntry("compatible"):
                     return False
         return True

cura/Settings/SettingOverrideDecorator.py

@@ -62,7 +62,7 @@ class SettingOverrideDecorator(SceneNodeDecorator):
 
         # use value from the stack because there can be a delay in signal triggering and "_is_non_printing_mesh"
         # has not been updated yet.
-        deep_copy._is_non_printing_mesh = any(bool(self._stack.getProperty(setting, "value")) for setting in self._non_printing_mesh_settings)
+        deep_copy._is_non_printing_mesh = self.evaluateIsNonPrintingMesh()
 
         return deep_copy
 
@@ -90,10 +90,18 @@ class SettingOverrideDecorator(SceneNodeDecorator):
     def isNonPrintingMesh(self):
         return self._is_non_printing_mesh
 
+    def evaluateIsNonPrintingMesh(self):
+        return any(bool(self._stack.getProperty(setting, "value")) for setting in self._non_printing_mesh_settings)
+
     def _onSettingChanged(self, instance, property_name): # Reminder: 'property' is a built-in function
+        object_has_instance_setting = False
+        for container in self._stack.getContainers():
+            if container.hasProperty(instance, "value"):
+                object_has_instance_setting = True
+                break
+        if property_name == "value" and object_has_instance_setting:
             # Trigger slice/need slicing if the value has changed.
-        if property_name == "value":
-            self._is_non_printing_mesh = any(bool(self._stack.getProperty(setting, "value")) for setting in self._non_printing_mesh_settings)
+            self._is_non_printing_mesh = self.evaluateIsNonPrintingMesh()
 
             Application.getInstance().getBackend().needsSlicing()
             Application.getInstance().getBackend().tickle()

plugins/3MFReader/ThreeMFWorkspaceReader.py

@@ -216,11 +216,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
         archive = zipfile.ZipFile(file_name, "r")
         cura_file_names = [name for name in archive.namelist() if name.startswith("Cura/")]
 
-        # A few lists of containers in this project files.
-        # When loading the global stack file, it may be associated with those containers, which may or may not be
-        # in Cura already, so we need to provide them as alternative search lists.
-        instance_container_list = []
-
         resolve_strategy_keys = ["machine", "material", "quality_changes"]
         self._resolve_strategies = {k: None for k in resolve_strategy_keys}
         containers_found_dict = {k: False for k in resolve_strategy_keys}
@@ -307,34 +302,34 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             container_info = ContainerInfo(instance_container_file_name, serialized, parser)
             instance_container_info_dict[container_id] = container_info
 
-            instance_container = InstanceContainer(container_id)
-
-            # Deserialize InstanceContainer by converting read data from bytes to string
-            instance_container.deserialize(serialized, file_name = instance_container_file_name)
-            instance_container_list.append(instance_container)
-
-            container_type = instance_container.getMetaDataEntry("type")
+            container_type = parser["metadata"]["type"]
             if container_type == "quality_changes":
                 quality_changes_info_list.append(container_info)
 
-                if not parser.has_option("metadata", "extruder"):
+                if not parser.has_option("metadata", "position"):
                     self._machine_info.quality_changes_info.name = parser["general"]["name"]
                     self._machine_info.quality_changes_info.global_info = container_info
+                else:
+                    position = parser["metadata"]["position"]
+                    self._machine_info.quality_changes_info.extruder_info_dict[position] = container_info
 
-                quality_name = instance_container.getName()
-                num_settings_overriden_by_quality_changes += len(instance_container._instances)
+                quality_name = parser["general"]["name"]
+                values = parser["values"] if parser.has_section("values") else dict()
+                num_settings_overriden_by_quality_changes += len(values)
                 # Check if quality changes already exists.
                 quality_changes = self._container_registry.findInstanceContainers(id = container_id)
                 if quality_changes:
                     containers_found_dict["quality_changes"] = True
                     # Check if there really is a conflict by comparing the values
+                    instance_container = InstanceContainer(container_id)
+                    instance_container.deserialize(serialized, file_name = instance_container_file_name)
                     if quality_changes[0] != instance_container:
                         quality_changes_conflict = True
             elif container_type == "quality":
                 if not quality_name:
-                    quality_name = instance_container.getName()
+                    quality_name = parser["general"]["name"]
             elif container_type == "user":
-                num_user_settings += len(instance_container._instances)
+                num_user_settings += len(parser["values"])
             elif container_type in self._ignored_instance_container_types:
                 # Ignore certain instance container types
                 Logger.log("w", "Ignoring instance container [%s] with type [%s]", container_id, container_type)
@@ -453,15 +448,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                         machine_conflict = True
                         break
 
-        if self._machine_info.quality_changes_info is not None:
-            for quality_changes_info in quality_changes_info_list:
-                if not quality_changes_info.parser.has_option("metadata", "extruder"):
-                    continue
-                extruder_definition_id = quality_changes_info.parser["metadata"]["extruder"]
-                extruder_definition_metadata = self._container_registry.findDefinitionContainersMetadata(id = extruder_definition_id)[0]
-                position = extruder_definition_metadata["position"]
-                self._machine_info.quality_changes_info.extruder_info_dict[position] = quality_changes_info
-
         num_visible_settings = 0
         try:
             temp_preferences = Preferences()
@@ -739,7 +725,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             from cura.Machines.QualityManager import getMachineDefinitionIDForQualitySearch
             machine_definition_id_for_quality = getMachineDefinitionIDForQualitySearch(global_stack)
             machine_definition_for_quality = self._container_registry.findDefinitionContainers(id = machine_definition_id_for_quality)[0]
-            extruder_dict_for_quality = machine_definition_for_quality.getMetaDataEntry("machine_extruder_trains")
 
             quality_changes_info = self._machine_info.quality_changes_info
             quality_changes_quality_type = quality_changes_info.global_info.parser["metadata"]["quality_type"]
@@ -752,13 +737,12 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
 
                 quality_changes_name = self._container_registry.uniqueName(quality_changes_name)
                 for position, container_info in container_info_dict.items():
-                    extruder_definition_id = None
+                    extruder_stack = None
                     if position is not None:
-                        extruder_definition_id = extruder_dict_for_quality[position]
-
+                        extruder_stack = global_stack.extruders[position]
                     container = quality_manager._createQualityChanges(quality_changes_quality_type,
                                                                       quality_changes_name,
-                                                                      global_stack, extruder_definition_id)
+                                                                      global_stack, extruder_stack)
                     container_info.container = container
                     container.setDirty(True)
                     self._container_registry.addContainer(container)
@@ -781,18 +765,14 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                         container_info = quality_changes_info.extruder_info_dict[position]
                         container_info.container = container
 
-            for position, container_info in quality_changes_info.extruder_info_dict.items():
-                container_info.definition_id = extruder_dict_for_quality[position]
-
             # If there is no quality changes for any extruder, create one.
             if not quality_changes_info.extruder_info_dict:
                 container_info = ContainerInfo(None, None, None)
                 quality_changes_info.extruder_info_dict["0"] = container_info
-                extruder_definition_id = extruder_dict_for_quality["0"]
-                container_info.definition_id = extruder_definition_id
+                extruder_stack = global_stack.extruders["0"]
 
                 container = quality_manager._createQualityChanges(quality_changes_quality_type, quality_changes_name,
-                                                                  global_stack, extruder_definition_id)
+                                                                  global_stack, extruder_stack)
                 container_info.container = container
                 container.setDirty(True)
                 self._container_registry.addContainer(container)
@@ -818,9 +798,9 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                     continue
 
                 if container_info.container is None:
-                    extruder_definition_id = extruder_dict_for_quality[position]
+                    extruder_stack = global_stack.extruders[position]
                     container = quality_manager._createQualityChanges(quality_changes_quality_type, quality_changes_name,
-                                                                      global_stack, extruder_definition_id)
+                                                                      global_stack, extruder_stack)
                     container_info.container = container
 
                 for key, value in container_info.parser["values"].items():

plugins/CuraEngineBackend/CuraEngineBackend.py

@@ -94,6 +94,8 @@ class CuraEngineBackend(QObject, Backend):
         self._onGlobalStackChanged()
 
         Application.getInstance().stacksValidationFinished.connect(self._onStackErrorCheckFinished)
+        # extruder enable / disable. Actually wanted to use machine manager here, but the initialization order causes it to crash
+        ExtruderManager.getInstance().extrudersChanged.connect(self._extruderChanged)
 
         # A flag indicating if an error check was scheduled
         # If so, we will stop the auto-slice timer and start upon the error check
@@ -782,3 +784,9 @@ class CuraEngineBackend(QObject, Backend):
     def tickle(self):
         if self._use_timer:
             self._change_timer.start()
+
+    def _extruderChanged(self):
+        for build_plate_number in range(Application.getInstance().getMultiBuildPlateModel().maxBuildPlate + 1):
+            if build_plate_number not in self._build_plates_to_be_sliced:
+                self._build_plates_to_be_sliced.append(build_plate_number)
+        self._invokeSlice()

plugins/CuraEngineBackend/ProcessSlicedLayersJob.py

@@ -81,7 +81,8 @@ class ProcessSlicedLayersJob(Job):
 
         Application.getInstance().getController().activeViewChanged.connect(self._onActiveViewChanged)
 
-        new_node = CuraSceneNode()
+        # The no_setting_override is here because adding the SettingOverrideDecorator will trigger a reslice
+        new_node = CuraSceneNode(no_setting_override = True)
         new_node.addDecorator(BuildPlateDecorator(self._build_plate_number))
 
         # Force garbage collection.

plugins/CuraEngineBackend/StartSliceJob.py

@@ -129,8 +129,10 @@ class StartSliceJob(Job):
             self.setResult(StartJobResult.MaterialIncompatible)
             return
 
-        for extruder_stack in ExtruderManager.getInstance().getMachineExtruders(stack.getId()):
+        for position, extruder_stack in stack.extruders.items():
             material = extruder_stack.findContainer({"type": "material"})
+            if not extruder_stack.isEnabled:
+                continue
             if material:
                 if material.getMetaDataEntry("compatible") == False:
                     self.setResult(StartJobResult.MaterialIncompatible)
@@ -189,8 +191,15 @@ class StartSliceJob(Job):
                         if per_object_stack:
                             is_non_printing_mesh = any(per_object_stack.getProperty(key, "value") for key in NON_PRINTING_MESH_SETTINGS)
 
-                        if node.callDecoration("getBuildPlateNumber") == self._build_plate_number:
-                            if not getattr(node, "_outside_buildarea", False) or is_non_printing_mesh:
+                        # Find a reason not to add the node
+                        if node.callDecoration("getBuildPlateNumber") != self._build_plate_number:
+                            continue
+                        if getattr(node, "_outside_buildarea", False) and not is_non_printing_mesh:
+                            continue
+                        node_position = node.callDecoration("getActiveExtruderPosition")
+                        if not stack.extruders[str(node_position)].isEnabled:
+                            continue
+
                         temp_list.append(node)
                         if not is_non_printing_mesh:
                             has_printing_mesh = True
@@ -269,9 +278,15 @@ class StartSliceJob(Job):
     #   \return A dictionary of replacement tokens to the values they should be
     #   replaced with.
     def _buildReplacementTokens(self, stack) -> dict:
+        default_extruder_position = int(Application.getInstance().getMachineManager().defaultExtruderPosition)
         result = {}
         for key in stack.getAllKeys():
-            result[key] = stack.getProperty(key, "value")
+            setting_type = stack.getProperty(key, "type")
+            value = stack.getProperty(key, "value")
+            if setting_type == "extruder" and value == -1:
+                # replace with the default value
+                value = default_extruder_position
+            result[key] = value
             Job.yieldThread()
 
         result["print_bed_temperature"] = result["material_bed_temperature"] # Renamed settings.
@@ -377,11 +392,11 @@ class StartSliceJob(Job):
     #   limit_to_extruder property.
     def _buildGlobalInheritsStackMessage(self, stack):
         for key in stack.getAllKeys():
-            extruder = int(round(float(stack.getProperty(key, "limit_to_extruder"))))
-            if extruder >= 0: #Set to a specific extruder.
+            extruder_position = int(round(float(stack.getProperty(key, "limit_to_extruder"))))
+            if extruder_position >= 0:  # Set to a specific extruder.
                 setting_extruder = self._slice_message.addRepeatedMessage("limit_to_extruder")
                 setting_extruder.name = key
-                setting_extruder.extruder = extruder
+                setting_extruder.extruder = extruder_position
             Job.yieldThread()
 
     ##  Check if a node has per object settings and ensure that they are set correctly in the message

plugins/MachineSettingsAction/MachineSettingsAction.qml

@@ -244,6 +244,7 @@ Cura.MachineAction
                                 height: childrenRect.height
                                 width: childrenRect.width
                                 text: machineExtruderCountProvider.properties.description
+                                visible: extruderCountModel.count >= 2
 
                                 Row
                                 {

plugins/PostProcessingPlugin/PostProcessingPlugin.py

@@ -173,7 +173,10 @@ class PostProcessingPlugin(QObject, Extension):
         Logger.log("d", "Creating post processing plugin view.")
 
         ## Load all scripts in the scripts folders
-        for root in [PluginRegistry.getInstance().getPluginPath("PostProcessingPlugin"), Resources.getStoragePath(Resources.Preferences)]:
+        #  The PostProcessingPlugin path is for built-in scripts.
+        #  The Resources path is where the user should store custom scripts.
+        #  The Preferences path is legacy, where the user may previously have stored scripts.
+        for root in [PluginRegistry.getInstance().getPluginPath("PostProcessingPlugin"), Resources.getStoragePath(Resources.Resources), Resources.getStoragePath(Resources.Preferences)]:
             path = os.path.join(root, "scripts")
             if not os.path.isdir(path):
                 try:

plugins/SolidView/SolidView.py

@@ -78,17 +78,13 @@ class SolidView(View):
 
         for node in DepthFirstIterator(scene.getRoot()):
             if not node.render(renderer):
-                if node.getMeshData() and node.isVisible():
+                if node.getMeshData() and node.isVisible() and not node.callDecoration("getLayerData"):
                     uniforms = {}
                     shade_factor = 1.0
 
                     per_mesh_stack = node.callDecoration("getStack")
 
-                    # Get color to render this mesh in from ExtrudersModel
-                    extruder_index = 0
-                    extruder_id = node.callDecoration("getActiveExtruder")
-                    if extruder_id:
-                        extruder_index = max(0, self._extruders_model.find("id", extruder_id))
+                    extruder_index = int(node.callDecoration("getActiveExtruderPosition"))
 
                     # Use the support extruder instead of the active extruder if this is a support_mesh
                     if per_mesh_stack:

plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py

@@ -301,8 +301,8 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
             self._updatePrintJob(print_job, print_job_data)
 
             if print_job.state != "queued":  # Print job should be assigned to a printer.
-                if print_job.state == "failed":
-                    # Print job was failed, so don't attach it to a printer.
+                if print_job.state in ["failed", "finished", "aborted"]:
+                    # Print job was already completed, so don't attach it to a printer.
                     printer = None
                 else:
                     printer = self._getPrinterByKey(print_job_data["printer_uuid"])

plugins/XmlMaterialProfile/XmlMaterialProfile.py

@@ -205,7 +205,7 @@ class XmlMaterialProfile(InstanceContainer):
                 self._addSettingElement(builder, instance)
 
         machine_container_map = {}
-        machine_nozzle_map = {}
+        machine_variant_map = {}
 
         variant_manager = CuraApplication.getInstance().getVariantManager()
         material_manager = CuraApplication.getInstance().getMaterialManager()
@@ -225,13 +225,14 @@ class XmlMaterialProfile(InstanceContainer):
             if definition_id not in machine_container_map:
                 machine_container_map[definition_id] = container
 
-            if definition_id not in machine_nozzle_map:
-                machine_nozzle_map[definition_id] = {}
+            if definition_id not in machine_variant_map:
+                machine_variant_map[definition_id] = {}
 
             variant_name = container.getMetaDataEntry("variant_name")
             if variant_name:
-                machine_nozzle_map[definition_id][variant_name] = variant_manager.getVariantNode(definition_id,
-                                                                                                 variant_name)
+                variant_dict = {"variant_node": variant_manager.getVariantNode(definition_id, variant_name),
+                                "material_container": container}
+                machine_variant_map[definition_id][variant_name] = variant_dict
                 continue
 
             machine_container_map[definition_id] = container
@@ -265,12 +266,18 @@ class XmlMaterialProfile(InstanceContainer):
                 self._addSettingElement(builder, instance)
 
             # Find all hotend sub-profiles corresponding to this material and machine and add them to this profile.
-            for hotend_name, variant_node in machine_nozzle_map[definition_id].items():
+            buildplate_dict = {}
+            for variant_name, variant_dict in machine_variant_map[definition_id].items():
+                variant_type = variant_dict["variant_node"].metadata["hardware_type"]
+                from cura.Machines.VariantManager import VariantType
+                variant_type = VariantType(variant_type)
+                if variant_type == VariantType.NOZZLE:
                     # The hotend identifier is not the containers name, but its "name".
-                builder.start("hotend", {"id": hotend_name})
+                    builder.start("hotend", {"id": variant_name})
 
                     # Compatible is a special case, as it's added as a meta data entry (instead of an instance).
-                compatible = variant_node.metadata.get("compatible")
+                    material_container = variant_dict["material_container"]
+                    compatible = container.getMetaDataEntry("compatible")
                     if compatible is not None:
                         builder.start("setting", {"key": "hardware compatible"})
                         if compatible:
@@ -279,15 +286,41 @@ class XmlMaterialProfile(InstanceContainer):
                             builder.data("no")
                         builder.end("setting")
 
-                for instance in variant_node.getContainer().findInstances():
+                    for instance in material_container.findInstances():
                         if container.getInstance(instance.definition.key) and container.getProperty(instance.definition.key, "value") == instance.value:
                             # If the settings match that of the machine profile, just skip since we inherit the machine profile.
                             continue
 
                         self._addSettingElement(builder, instance)
 
+                    if material_container.getMetaDataEntry("buildplate_compatible") and not buildplate_dict:
+                        buildplate_dict["buildplate_compatible"] = material_container.getMetaDataEntry("buildplate_compatible")
+                        buildplate_dict["buildplate_recommended"] = material_container.getMetaDataEntry("buildplate_recommended")
+                        buildplate_dict["material_container"] = material_container
+
                     builder.end("hotend")
 
+            if buildplate_dict:
+                for variant_name in buildplate_dict["buildplate_compatible"]:
+                    builder.start("buildplate", {"id": variant_name})
+
+                    material_container = buildplate_dict["material_container"]
+                    buildplate_compatible_dict = material_container.getMetaDataEntry("buildplate_compatible")
+                    buildplate_recommended_dict = material_container.getMetaDataEntry("buildplate_recommended")
+                    if buildplate_compatible_dict:
+                        compatible = buildplate_compatible_dict[variant_name]
+                        recommended = buildplate_recommended_dict[variant_name]
+
+                        builder.start("setting", {"key": "hardware compatible"})
+                        builder.data("yes" if compatible else "no")
+                        builder.end("setting")
+
+                        builder.start("setting", {"key": "hardware recommended"})
+                        builder.data("yes" if recommended else "no")
+                        builder.end("setting")
+
+                    builder.end("buildplate")
+
             builder.end("machine")
 
         builder.end("settings")
@@ -617,7 +650,8 @@ class XmlMaterialProfile(InstanceContainer):
 
                         from cura.Machines.VariantManager import VariantType
                         variant_manager = CuraApplication.getInstance().getVariantManager()
-                        variant_node = variant_manager.getVariantNode(machine_id, buildplate_id)
+                        variant_node = variant_manager.getVariantNode(machine_id, buildplate_id,
+                                                                      variant_type = VariantType.BUILD_PLATE)
                         if not variant_node:
                             continue
 
@@ -841,6 +875,8 @@ class XmlMaterialProfile(InstanceContainer):
                             continue
 
                         settings = buildplate.iterfind("./um:setting", cls.__namespaces)
+                        buildplate_compatibility = True
+                        buildplate_recommended = True
                         for entry in settings:
                             key = entry.get("key")
                             if key == "hardware compatible":
@@ -848,8 +884,8 @@ class XmlMaterialProfile(InstanceContainer):
                             elif key == "hardware recommended":
                                 buildplate_recommended = cls._parseCompatibleValue(entry.text)
 
-                        buildplate_map["buildplate_compatible"][buildplate_id] = buildplate_map["buildplate_compatible"]
-                        buildplate_map["buildplate_recommended"][buildplate_id] = buildplate_map["buildplate_recommended"]
+                        buildplate_map["buildplate_compatible"][buildplate_id] = buildplate_compatibility
+                        buildplate_map["buildplate_recommended"][buildplate_id] = buildplate_recommended
 
                     for hotend in machine.iterfind("./um:hotend", cls.__namespaces):
                         hotend_name = hotend.get("id")

resources/definitions/fdmprinter.def.json

@@ -211,6 +211,18 @@
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": false
                 },
+                "extruders_enabled_count":
+                {
+                    "label": "Number of Extruders that are enabled",
+                    "description": "Number of extruder trains that are enabled; automatically set in software",
+                    "default_value": "machine_extruder_count",
+                    "minimum_value": "1",
+                    "maximum_value": "16",
+                    "type": "int",
+                    "settable_per_mesh": false,
+                    "settable_per_extruder": false,
+                    "settable_per_meshgroup": false
+                },
                 "machine_nozzle_tip_outer_diameter":
                 {
                     "label": "Outer nozzle diameter",
@@ -887,7 +899,7 @@
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
-                    "enabled": "machine_extruder_count > 1",
+                    "enabled": "extruders_enabled_count > 1",
                     "children": {
                         "wall_0_extruder_nr":
                         {
@@ -900,7 +912,7 @@
                             "settable_per_extruder": false,
                             "settable_per_meshgroup": true,
                             "settable_globally": true,
-                            "enabled": "machine_extruder_count > 1"
+                            "enabled": "extruders_enabled_count > 1"
                         },
                         "wall_x_extruder_nr":
                         {
@@ -913,7 +925,7 @@
                             "settable_per_extruder": false,
                             "settable_per_meshgroup": true,
                             "settable_globally": true,
-                            "enabled": "machine_extruder_count > 1"
+                            "enabled": "extruders_enabled_count > 1"
                         }
                     }
                 },
@@ -970,7 +982,7 @@
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
-                    "enabled": "machine_extruder_count > 1 and max(extruderValues('roofing_layer_count')) > 0 and max(extruderValues('top_layers')) > 0"
+                    "enabled": "extruders_enabled_count > 1 and max(extruderValues('roofing_layer_count')) > 0 and max(extruderValues('top_layers')) > 0"
                 },
                 "roofing_layer_count":
                 {
@@ -995,7 +1007,7 @@
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
-                    "enabled": "machine_extruder_count > 1"
+                    "enabled": "extruders_enabled_count > 1"
                 },
                 "top_bottom_thickness":
                 {
@@ -1465,7 +1477,7 @@
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
-                    "enabled": "machine_extruder_count > 1"
+                    "enabled": "extruders_enabled_count > 1"
                 },
                 "infill_sparse_density":
                 {
@@ -1916,7 +1928,7 @@
                     "minimum_value": "0",
                     "maximum_value_warning": "10.0",
                     "maximum_value": "machine_nozzle_heat_up_speed",
-                    "enabled": "material_flow_dependent_temperature or (machine_extruder_count > 1 and material_final_print_temperature != material_print_temperature)",
+                    "enabled": "material_flow_dependent_temperature or (extruders_enabled_count > 1 and material_final_print_temperature != material_print_temperature)",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true
                 },
@@ -2179,7 +2191,7 @@
                     "minimum_value": "-273.15",
                     "minimum_value_warning": "0",
                     "maximum_value_warning": "260",
-                    "enabled": "machine_extruder_count > 1 and machine_nozzle_temp_enabled",
+                    "enabled": "extruders_enabled_count > 1 and machine_nozzle_temp_enabled",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true
                 },
@@ -3281,7 +3293,7 @@
                     "description": "After the machine switched from one extruder to the other, the build plate is lowered to create clearance between the nozzle and the print. This prevents the nozzle from leaving oozed material on the outside of a print.",
                     "type": "bool",
                     "default_value": true,
-                    "enabled": "retraction_hop_enabled and machine_extruder_count > 1",
+                    "enabled": "retraction_hop_enabled and extruders_enabled_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true
                 }
@@ -3459,7 +3471,8 @@
                     "description": "The extruder train to use for printing the support. This is used in multi-extrusion.",
                     "type": "extruder",
                     "default_value": "0",
-                    "enabled": "(support_enable or support_tree_enable) and machine_extruder_count > 1",
+                    "value": "-1",
+                    "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "children": {
@@ -3470,7 +3483,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "(support_enable or support_tree_enable) and machine_extruder_count > 1",
+                            "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -3481,7 +3494,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "(support_enable or support_tree_enable) and machine_extruder_count > 1",
+                            "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -3492,7 +3505,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "(support_enable or support_tree_enable) and machine_extruder_count > 1",
+                            "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false,
                             "children":
@@ -3504,7 +3517,7 @@
                                     "type": "extruder",
                                     "default_value": "0",
                                     "value": "support_interface_extruder_nr",
-                                    "enabled": "(support_enable or support_tree_enable) and machine_extruder_count > 1",
+                                    "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                                     "settable_per_mesh": false,
                                     "settable_per_extruder": false
                                 },
@@ -3515,7 +3528,7 @@
                                     "type": "extruder",
                                     "default_value": "0",
                                     "value": "support_interface_extruder_nr",
-                                    "enabled": "(support_enable or support_tree_enable) and machine_extruder_count > 1",
+                                    "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                                     "settable_per_mesh": false,
                                     "settable_per_extruder": false
                                 }
@@ -4185,7 +4198,8 @@
                     "description": "The extruder train to use for printing the skirt/brim/raft. This is used in multi-extrusion.",
                     "type": "extruder",
                     "default_value": "0",
-                    "enabled": "machine_extruder_count > 1 and resolveOrValue('adhesion_type') != 'none'",
+                    "value": "-1",
+                    "enabled": "extruders_enabled_count > 1 and resolveOrValue('adhesion_type') != 'none'",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
                 },
@@ -4756,7 +4770,7 @@
                     "label": "Enable Prime Tower",
                     "description": "Print a tower next to the print which serves to prime the material after each nozzle switch.",
                     "type": "bool",
-                    "enabled": "machine_extruder_count > 1",
+                    "enabled": "extruders_enabled_count > 1",
                     "default_value": false,
                     "resolve": "any(extruderValues('prime_tower_enable'))",
                     "settable_per_mesh": false,
@@ -4904,7 +4918,7 @@
                     "description": "Enable exterior ooze shield. This will create a shell around the model which is likely to wipe a second nozzle if it's at the same height as the first nozzle.",
                     "type": "bool",
                     "resolve": "any(extruderValues('ooze_shield_enabled'))",
-                    "enabled": "machine_extruder_count > 1",
+                    "enabled": "extruders_enabled_count > 1",
                     "default_value": false,
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
@@ -4997,7 +5011,7 @@
                     "description": "Remove areas where multiple meshes are overlapping with each other. This may be used if merged dual material objects overlap with each other.",
                     "type": "bool",
                     "default_value": true,
-                    "value": "machine_extruder_count > 1",
+                    "value": "extruders_enabled_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true
@@ -5044,7 +5058,7 @@
                         "one_at_a_time": "One at a Time"
                     },
                     "default_value": "all_at_once",
-                    "enabled": "machine_extruder_count == 1",
+                    "enabled": "extruders_enabled_count == 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": false

resources/definitions/ubuild-3d_mr_bot_280.def.json

@@ -11,7 +11,8 @@
         "file_formats": "text/x-gcode",
         "icon": "icon_uBuild-3D",
         "platform": "mr_bot_280_platform.stl",
-        "has_materials": true
+        "has_materials": true,
+        "preferred_quality_type": "draft"
     },
 
     "overrides": {
@@ -24,7 +25,6 @@
         "material_diameter": { "default_value": 1.75 },
         "material_bed_temperature": { "default_value": 70 },
         "machine_nozzle_size": { "default_value": 0.4 },
-        "layer_height": { "default_value": 0.2 },
         "layer_height_0": { "default_value": 0.1 },
         "retraction_amount": { "default_value": 2 },
         "retraction_speed": { "default_value": 50 },

resources/definitions/ultimaker3.def.json

@@ -43,10 +43,10 @@
         {
             "default_value":
             [
-                [ -29, 6.1 ],
-                [ -29, -33.9 ],
-                [ 71, 6.1 ],
-                [ 71, -33.9 ]
+                [ -41.9, -45.8 ],
+                [ -41.9, 33.9 ],
+                [ 59.9, 33.9 ],
+                [ 59.9, -45.8 ]
             ]
         },
         "machine_gcode_flavor": { "default_value": "Griffin" },

resources/qml/Cura.qml

@@ -194,14 +194,31 @@ UM.MainWindow
                         NozzleMenu { title: Cura.MachineManager.activeDefinitionVariantsName; visible: Cura.MachineManager.hasVariants; extruderIndex: index }
                         MaterialMenu { title: catalog.i18nc("@title:menu", "&Material"); visible: Cura.MachineManager.hasMaterials; extruderIndex: index }
 
-                        MenuSeparator {
+                        MenuSeparator
+                        {
                             visible: Cura.MachineManager.hasVariants || Cura.MachineManager.hasMaterials
                         }
 
-                        MenuItem {
+                        MenuItem
+                        {
                             text: catalog.i18nc("@action:inmenu", "Set as Active Extruder")
-                            onTriggered: Cura.ExtruderManager.setActiveExtruderIndex(model.index)
+                            onTriggered: Cura.MachineManager.setExtruderIndex(model.index)
                         }
+
+                        MenuItem
+                        {
+                            text: catalog.i18nc("@action:inmenu", "Enable Extruder")
+                            onTriggered: Cura.MachineManager.setExtruderEnabled(model.index, true)
+                            visible: !Cura.MachineManager.getExtruder(model.index).isEnabled
+                        }
+
+                        MenuItem
+                        {
+                            text: catalog.i18nc("@action:inmenu", "Disable Extruder")
+                            onTriggered: Cura.MachineManager.setExtruderEnabled(model.index, false)
+                            visible: Cura.MachineManager.getExtruder(model.index).isEnabled
+                        }
+
                     }
                     onObjectAdded: settingsMenu.insertItem(index, object)
                     onObjectRemoved: settingsMenu.removeItem(object)

resources/qml/ExtruderButton.qml

@@ -19,7 +19,7 @@ Button
     iconSource: UM.Theme.getIcon("extruder_button")
 
     checked: Cura.ExtruderManager.selectedObjectExtruders.indexOf(extruder.id) != -1
-    enabled: UM.Selection.hasSelection
+    enabled: UM.Selection.hasSelection && extruder.stack.isEnabled
 
     property color customColor: base.hovered ? UM.Theme.getColor("button_hover") : UM.Theme.getColor("button");
 

resources/qml/Preferences/MaterialsPage.qml

@@ -19,14 +19,17 @@ Item
 
     UM.I18nCatalog { id: catalog; name: "cura"; }
 
-    Cura.MaterialManagementModel {
+    Cura.MaterialManagementModel
+    {
         id: materialsModel
     }
 
-    Label {
+    Label
+    {
         id: titleLabel
 
-        anchors {
+        anchors
+        {
             top: parent.top
             left: parent.left
             right: parent.right
@@ -170,22 +173,27 @@ Item
     Connections
     {
         target: materialsModel
-        onItemsChanged: {
+        onItemsChanged:
+        {
             var currentItemId = base.currentItem == null ? "" : base.currentItem.root_material_id;
             var position = Cura.ExtruderManager.activeExtruderIndex;
 
             // try to pick the currently selected item; it may have been moved
-            if (base.newRootMaterialIdToSwitchTo == "") {
+            if (base.newRootMaterialIdToSwitchTo == "")
+            {
                 base.newRootMaterialIdToSwitchTo = currentItemId;
             }
 
-            for (var idx = 0; idx < materialsModel.rowCount(); ++idx) {
+            for (var idx = 0; idx < materialsModel.rowCount(); ++idx)
+            {
                 var item = materialsModel.getItem(idx);
-                if (item.root_material_id == base.newRootMaterialIdToSwitchTo) {
+                if (item.root_material_id == base.newRootMaterialIdToSwitchTo)
+                {
                     // Switch to the newly created profile if needed
                     materialListView.currentIndex = idx;
                     materialListView.activateDetailsWithIndex(materialListView.currentIndex);
-                    if (base.toActivateNewMaterial) {
+                    if (base.toActivateNewMaterial)
+                    {
                         Cura.MachineManager.setMaterial(position, item.container_node);
                     }
                     base.newRootMaterialIdToSwitchTo = "";
@@ -196,7 +204,8 @@ Item
 
             materialListView.currentIndex = 0;
             materialListView.activateDetailsWithIndex(materialListView.currentIndex);
-            if (base.toActivateNewMaterial) {
+            if (base.toActivateNewMaterial)
+            {
                 Cura.MachineManager.setMaterial(position, materialsModel.getItem(0).container_node);
             }
             base.newRootMaterialIdToSwitchTo = "";
@@ -233,14 +242,17 @@ Item
 
             messageDialog.title = catalog.i18nc("@title:window", "Import Material");
             messageDialog.text = catalog.i18nc("@info:status Don't translate the XML tags <filename> or <message>!", "Could not import material <filename>%1</filename>: <message>%2</message>").arg(fileUrl).arg(result.message);
-            if (result.status == "success") {
+            if (result.status == "success")
+            {
                 messageDialog.icon = StandardIcon.Information;
                 messageDialog.text = catalog.i18nc("@info:status Don't translate the XML tag <filename>!", "Successfully imported material <filename>%1</filename>").arg(fileUrl);
             }
-            else if (result.status == "duplicate") {
+            else if (result.status == "duplicate")
+            {
                 messageDialog.icon = StandardIcon.Warning;
             }
-            else {
+            else
+            {
                 messageDialog.icon = StandardIcon.Critical;
             }
             messageDialog.open();
@@ -260,12 +272,14 @@ Item
             var result = Cura.ContainerManager.exportContainer(base.currentItem.root_material_id, selectedNameFilter, fileUrl);
 
             messageDialog.title = catalog.i18nc("@title:window", "Export Material");
-            if (result.status == "error") {
+            if (result.status == "error")
+            {
                 messageDialog.icon = StandardIcon.Critical;
                 messageDialog.text = catalog.i18nc("@info:status Don't translate the XML tags <filename> and <message>!", "Failed to export material to <filename>%1</filename>: <message>%2</message>").arg(fileUrl).arg(result.message);
                 messageDialog.open();
             }
-            else if (result.status == "success") {
+            else if (result.status == "success")
+            {
                 messageDialog.icon = StandardIcon.Information;
                 messageDialog.text = catalog.i18nc("@info:status Don't translate the XML tag <filename>!", "Successfully exported material to <filename>%1</filename>").arg(result.path);
                 messageDialog.open();
@@ -283,7 +297,8 @@ Item
     Item {
         id: contentsItem
 
-        anchors {
+        anchors
+        {
             top: titleLabel.bottom
             left: parent.left
             right: parent.right
@@ -297,7 +312,8 @@ Item
 
     Item
     {
-        anchors {
+        anchors
+        {
             top: buttonRow.bottom
             topMargin: UM.Theme.getSize("default_margin").height
             left: parent.left
@@ -310,12 +326,14 @@ Item
         Label
         {
             id: captionLabel
-            anchors {
+            anchors
+            {
                 top: parent.top
                 left: parent.left
             }
             visible: text != ""
-            text: {
+            text:
+            {
                 var caption = catalog.i18nc("@action:label", "Printer") + ": " + Cura.MachineManager.activeMachineName;
                 if (Cura.MachineManager.hasVariants)
                 {
@@ -330,14 +348,16 @@ Item
         ScrollView
         {
             id: materialScrollView
-            anchors {
+            anchors
+            {
                 top: captionLabel.visible ? captionLabel.bottom : parent.top
                 topMargin: captionLabel.visible ? UM.Theme.getSize("default_margin").height : 0
                 bottom: parent.bottom
                 left: parent.left
             }
 
-            Rectangle {
+            Rectangle
+            {
                 parent: viewport
                 anchors.fill: parent
                 color: palette.light
@@ -418,13 +438,15 @@ Item
                     MouseArea
                     {
                         anchors.fill: parent
-                        onClicked: {
+                        onClicked:
+                        {
                             parent.ListView.view.currentIndex = model.index;
                         }
                     }
                 }
 
-                function activateDetailsWithIndex(index) {
+                function activateDetailsWithIndex(index)
+                {
                     var model = materialsModel.getItem(index);
                     base.currentItem = model;
                     materialDetailsView.containerId = model.container_id;
@@ -446,7 +468,8 @@ Item
         {
             id: detailsPanel
 
-            anchors {
+            anchors
+            {
                 left: materialScrollView.right
                 leftMargin: UM.Theme.getSize("default_margin").width
                 top: parent.top

resources/qml/Preferences/ProfileTab.qml

@@ -11,7 +11,7 @@ Tab
 {
     id: base
 
-    property string extruderPosition: ""
+    property int extruderPosition: -1 //Denotes the global stack.
     property var qualityItem: null
 
     property bool isQualityItemCurrentlyActivated:

resources/qml/Settings/SettingExtruder.qml

@@ -17,14 +17,39 @@ SettingItem
         id: control
         anchors.fill: parent
 
-        model: Cura.ExtrudersModel { onModelChanged: control.color = getItem(control.currentIndex).color }
+        model: Cura.ExtrudersModel
+        {
+            onModelChanged: {
+                control.color = getItem(control.currentIndex).color;
+            }
+        }
 
         textRole: "name"
 
+        // knowing the extruder position, try to find the item index in the model
+        function getIndexByPosition(position)
+        {
+            for (var item_index in model.items)
+            {
+                var item = model.getItem(item_index)
+                if (item.index == position)
+                {
+                    return item_index
+                }
+            }
+            return -1
+        }
+
         onActivated:
+        {
+            if (model.getItem(index).enabled)
             {
                 forceActiveFocus();
                 propertyProvider.setPropertyValue("value", model.getItem(index).index);
+            } else
+            {
+                currentIndex = propertyProvider.properties.value;  // keep the old value
+            }
         }
 
         onActiveFocusChanged:
@@ -64,6 +89,23 @@ SettingItem
             value: control.currentText != "" ? control.model.getItem(control.currentIndex).color : ""
         }
 
+        Binding
+        {
+            target: control
+            property: "currentIndex"
+            value:
+            {
+                if(propertyProvider.properties.value == -1)
+                {
+                    return control.getIndexByPosition(Cura.MachineManager.defaultExtruderPosition);
+                }
+                return propertyProvider.properties.value
+            }
+            // Sometimes when the value is already changed, the model is still being built.
+            // The when clause ensures that the current index is not updated when this happens.
+            when: control.model.items.length > 0
+        }
+
         indicator: UM.RecolorImage
         {
             id: downArrow
@@ -173,7 +215,13 @@ SettingItem
             {
                 text: model.name
                 renderType: Text.NativeRendering
-                color: UM.Theme.getColor("setting_control_text")
+                color: {
+                    if (model.enabled) {
+                        UM.Theme.getColor("setting_control_text")
+                    } else {
+                        UM.Theme.getColor("action_button_disabled_text");
+                    }
+                }
                 font: UM.Theme.getFont("default")
                 elide: Text.ElideRight
                 verticalAlignment: Text.AlignVCenter

resources/qml/SidebarHeader.qml

@@ -143,10 +143,42 @@ Column
                 exclusiveGroup: extruderMenuGroup
                 checked: base.currentExtruderIndex == index
 
-                onClicked:
+                property bool extruder_enabled: true
+
+                MouseArea
                 {
-                    forceActiveFocus() // Changing focus applies the currently-being-typed values so it can change the displayed setting values.
+                    anchors.fill: parent
+                    acceptedButtons: Qt.LeftButton | Qt.RightButton
+                    onClicked: {
+                        switch (mouse.button) {
+                            case Qt.LeftButton:
+                                forceActiveFocus(); // Changing focus applies the currently-being-typed values so it can change the displayed setting values.
                                 Cura.ExtruderManager.setActiveExtruderIndex(index);
+                                break;
+                            case Qt.RightButton:
+                                extruder_enabled = Cura.MachineManager.getExtruder(model.index).isEnabled
+                                extruderMenu.popup();
+                                break;
+                        }
+
+                    }
+                }
+
+                Menu
+                {
+                    id: extruderMenu
+
+                    MenuItem {
+                        text: catalog.i18nc("@action:inmenu", "Enable Extruder")
+                        onTriggered: Cura.MachineManager.setExtruderEnabled(model.index, true)
+                        visible: !extruder_enabled  // using an intermediate variable prevents an empty popup that occured now and then
+                    }
+
+                    MenuItem {
+                        text: catalog.i18nc("@action:inmenu", "Disable Extruder")
+                        onTriggered: Cura.MachineManager.setExtruderEnabled(model.index, false)
+                        visible: extruder_enabled
+                    }
                 }
 
                 style: ButtonStyle
@@ -166,6 +198,18 @@ Column
                             Behavior on color { ColorAnimation { duration: 50; } }
                         }
 
+                        function buttonColor(index) {
+                            var extruder = Cura.MachineManager.getExtruder(index);
+                            if (extruder.isEnabled) {
+                                return (
+                                    control.checked || control.pressed) ? UM.Theme.getColor("action_button_active_text") :
+                                    control.hovered ? UM.Theme.getColor("action_button_hovered_text") :
+                                    UM.Theme.getColor("action_button_text");
+                            } else {
+                                return UM.Theme.getColor("action_button_disabled_text");
+                            }
+                        }
+
                         Item
                         {
                             id: extruderButtonFace
@@ -183,9 +227,7 @@ Column
                                 anchors.verticalCenter: parent.verticalCenter
                                 anchors.left: parent.left
 
-                                color: (control.checked || control.pressed) ? UM.Theme.getColor("action_button_active_text") :
-                                       control.hovered ? UM.Theme.getColor("action_button_hovered_text") :
-                                       UM.Theme.getColor("action_button_text")
+                                color: buttonColor(index)
 
                                 font: UM.Theme.getFont("large_nonbold")
                                 text: catalog.i18nc("@label", "Extruder")
@@ -228,9 +270,7 @@ Column
                                     id: extruderNumberText
                                     anchors.centerIn: parent
                                     text: index + 1;
-                                    color: (control.checked || control.pressed) ? UM.Theme.getColor("action_button_active_text") :
-                                           control.hovered ? UM.Theme.getColor("action_button_hovered_text") :
-                                           UM.Theme.getColor("action_button_text")
+                                    color: buttonColor(index)
                                     font: UM.Theme.getFont("default_bold")
                                 }
 

resources/qml/SidebarSimple.qml

@@ -19,7 +19,7 @@ Item
     property Action configureSettings;
     property variant minimumPrintTime: PrintInformation.minimumPrintTime;
     property variant maximumPrintTime: PrintInformation.maximumPrintTime;
-    property bool settingsEnabled: Cura.ExtruderManager.activeExtruderStackId || machineExtruderCount.properties.value == 1
+    property bool settingsEnabled: Cura.ExtruderManager.activeExtruderStackId || extrudersEnabledCount.properties.value == 1
 
     Component.onCompleted: PrintInformation.enabled = true
     Component.onDestruction: PrintInformation.enabled = false
@@ -67,10 +67,8 @@ Item
 
                 Connections
                 {
-                    target: Cura.MachineManager
-                    onActiveQualityChanged: qualityModel.update()
-                    onActiveMaterialChanged: qualityModel.update()
-                    onActiveVariantChanged: qualityModel.update()
+                    target: Cura.QualityProfilesDropDownMenuModel
+                    onItemsChanged: qualityModel.update()
                 }
 
                 Connections {
@@ -518,8 +516,13 @@ Item
                         // Update the slider value to represent the rounded value
                         infillSlider.value = roundedSliderValue
 
+                        // Update value only if the Recomended mode is Active,
+                        // Otherwise if I change the value in the Custom mode the Recomended view will try to repeat
+                        // same operation
+                        if (UM.Preferences.getValue("cura/active_mode") == 0) {
                             Cura.MachineManager.setSettingForAllExtruders("infill_sparse_density", "value", roundedSliderValue)
                         }
+                    }
 
                     style: SliderStyle
                     {
@@ -788,25 +791,10 @@ Item
                 }
             }
 
-            Label
-            {
-                id: supportExtruderLabel
-                visible: supportExtruderCombobox.visible
-                anchors.left: parent.left
-                anchors.leftMargin: UM.Theme.getSize("sidebar_margin").width
-                anchors.right: infillCellLeft.right
-                anchors.rightMargin: UM.Theme.getSize("sidebar_margin").width
-                anchors.verticalCenter: supportExtruderCombobox.verticalCenter
-                text: catalog.i18nc("@label", "Support Extruder");
-                font: UM.Theme.getFont("default");
-                color: UM.Theme.getColor("text");
-                elide: Text.ElideRight
-            }
-
             ComboBox
             {
                 id: supportExtruderCombobox
-                visible: enableSupportCheckBox.visible && (supportEnabled.properties.value == "True") && (machineExtruderCount.properties.value > 1)
+                visible: enableSupportCheckBox.visible && (supportEnabled.properties.value == "True") && (extrudersEnabledCount.properties.value > 1)
                 model: extruderModel
 
                 property string color_override: ""  // for manually setting values
@@ -820,11 +808,12 @@ Item
 
                 textRole: "text"  // this solves that the combobox isn't populated in the first time Cura is started
 
-                anchors.top: enableSupportCheckBox.bottom
-                anchors.topMargin: ((supportEnabled.properties.value === "True") && (machineExtruderCount.properties.value > 1)) ? UM.Theme.getSize("sidebar_margin").height : 0
-                anchors.left: infillCellRight.left
+                anchors.top: enableSupportCheckBox.top
+                //anchors.topMargin: ((supportEnabled.properties.value === "True") && (machineExtruderCount.properties.value > 1)) ? UM.Theme.getSize("sidebar_margin").height : 0
+                anchors.left: enableSupportCheckBox.right
+                anchors.leftMargin: Math.round(UM.Theme.getSize("sidebar_margin").width / 2)
 
-                width: Math.round(UM.Theme.getSize("sidebar").width * .55)
+                width: Math.round(UM.Theme.getSize("sidebar").width * .55) - Math.round(UM.Theme.getSize("sidebar_margin").width / 2) - enableSupportCheckBox.width
                 height: ((supportEnabled.properties.value == "True") && (machineExtruderCount.properties.value > 1)) ? UM.Theme.getSize("setting_control").height : 0
 
                 Behavior on height { NumberAnimation { duration: 100 } }
@@ -891,7 +880,7 @@ Item
                 id: adhesionCheckBox
                 property alias _hovered: adhesionMouseArea.containsMouse
 
-                anchors.top: enableSupportCheckBox.visible ? supportExtruderCombobox.bottom : infillCellRight.bottom
+                anchors.top: enableSupportCheckBox.bottom
                 anchors.topMargin: UM.Theme.getSize("sidebar_margin").height
                 anchors.left: infillCellRight.left
 
@@ -1022,9 +1011,9 @@ Item
 
             UM.SettingPropertyProvider
             {
-                id: machineExtruderCount
+                id: extrudersEnabledCount
                 containerStackId: Cura.MachineManager.activeMachineId
-                key: "machine_extruder_count"
+                key: "extruders_enabled_count"
                 watchedProperties: [ "value" ]
                 storeIndex: 0
             }