adding dropto buildplate drop per model in 3mf

CURA-10542

cura/PlatformPhysics.py

@@ -39,7 +39,7 @@ class PlatformPhysics:
 
         Application.getInstance().getPreferences().addPreference("physics/automatic_push_free", False)
         Application.getInstance().getPreferences().addPreference("physics/automatic_drop_down", False)
-        self._app_per_model_drop = Application.getInstance().getPreferences().getValue("physics/automatic_drop_down")
+        self._app_per_model_drop = None
 
     def getAppPerModelDropDown(self):
         return self._app_per_model_drop
@@ -78,6 +78,14 @@ class PlatformPhysics:
         # We try to shuffle all the nodes to prevent "locked" situations, where iteration B inverts iteration A.
         # By shuffling the order of the nodes, this might happen a few times, but at some point it will resolve.
         random.shuffle(nodes)
+        drop_down = False
+        # drop down in case nodes are asked to drop down from the user from workspaceDialog while opening 3mf
+        if self._app_per_model_drop and (self._app_per_model_drop != app_automatic_drop_down):
+            drop_down = True
+        # drop down in case the user has selected automated drop down preference for 3mf opening
+        if self._app_per_model_drop and app_automatic_drop_down:
+            drop_down= True
+
 
         for node in nodes:
             if node is root or not isinstance(node, SceneNode) or node.getBoundingBox() is None:
@@ -88,12 +96,9 @@ class PlatformPhysics:
             # Move it downwards if bottom is above platform
             move_vector = Vector()
 
-            # if per model drop is different then app_automatic_drop, in case of 3mf loading when user changes this setting for that model
+            if (node.getSetting(SceneNodeSettings.AutoDropDown, app_automatic_drop_down) or drop_down) and not (node.getParent() and node.getParent().callDecoration("isGroup") or node.getParent() != root)  and node.isEnabled():
-            if (self._app_per_model_drop != app_automatic_drop_down):
-                node.setSetting(SceneNodeSettings.AutoDropDown, self._app_per_model_drop)
-            if node.getSetting(SceneNodeSettings.AutoDropDown, self._app_per_model_drop) and not (node.getParent() and node.getParent().callDecoration("isGroup") or node.getParent() != root) and node.isEnabled(): #If an object is grouped, don't move it down
                 z_offset = node.callDecoration("getZOffset") if node.getDecorator(ZOffsetDecorator.ZOffsetDecorator) else 0
-                move_vector = move_vector.set(y = -bbox.bottom + z_offset)
+                move_vector = move_vector.set(y=-bbox.bottom + z_offset)
 
             # If there is no convex hull for the node, start calculating it and continue.
             if not node.getDecorator(ConvexHullDecorator) and not node.callDecoration("isNonPrintingMesh") and node.callDecoration("getLayerData") is None:
@@ -180,7 +185,7 @@ class PlatformPhysics:
                 op.push()
 
         # setting this drop to model same as app_automatic_drop_down
-        self._app_per_model_drop = app_automatic_drop_down
+        self._app_per_model_drop = None
         # After moving, we have to evaluate the boundary checks for nodes
         build_volume.updateNodeBoundaryCheck()
 

cura/Scene/CuraSceneNode.py

@@ -11,6 +11,7 @@ from UM.Scene.SceneNode import SceneNode
 from UM.Scene.SceneNodeDecorator import SceneNodeDecorator  # To cast the deepcopy of every decorator back to SceneNodeDecorator.
 
 import cura.CuraApplication  # To get the build plate.
+from UM.Scene.SceneNodeSettings import SceneNodeSettings
 from cura.Settings.ExtruderStack import ExtruderStack  # For typing.
 from cura.Settings.SettingOverrideDecorator import SettingOverrideDecorator  # For per-object settings.
 
@@ -26,6 +27,7 @@ class CuraSceneNode(SceneNode):
             self.addDecorator(SettingOverrideDecorator())  # Now we always have a getActiveExtruderPosition, unless explicitly disabled
         self._outside_buildarea = False
         self._print_order = 0
+        self._drop_down = Application.getInstance().getPreferences().getValue("physics/automatic_drop_down")
 
     def setOutsideBuildArea(self, new_value: bool) -> None:
         self._outside_buildarea = new_value
@@ -41,6 +43,10 @@ class CuraSceneNode(SceneNode):
     def isOutsideBuildArea(self) -> bool:
         return self._outside_buildarea or self.callDecoration("getBuildPlateNumber") < 0
 
+    @property
+    def isDropDownEnabled(self) ->bool:
+        return self.getSetting(SceneNodeSettings.AutoDropDown, self._drop_down)
+
     def isVisible(self) -> bool:
         return super().isVisible() and self.callDecoration("getBuildPlateNumber") == cura.CuraApplication.CuraApplication.getInstance().getMultiBuildPlateModel().activeBuildPlate
 

plugins/3MFReader/ThreeMFReader.py

@@ -16,6 +16,7 @@ from UM.Mesh.MeshReader import MeshReader
 from UM.MimeTypeDatabase import MimeTypeDatabase, MimeType
 from UM.Scene.GroupDecorator import GroupDecorator
 from UM.Scene.SceneNode import SceneNode  # For typing.
+from UM.Scene.SceneNodeSettings import SceneNodeSettings
 from cura.CuraApplication import CuraApplication
 from cura.Machines.ContainerTree import ContainerTree
 from cura.Scene.BuildPlateDecorator import BuildPlateDecorator
@@ -180,6 +181,9 @@ class ThreeMFReader(MeshReader):
                 if key == "print_order":
                     um_node.printOrder = int(setting_value)
                     continue
+                if key =="drop_to_buildplate":
+                    um_node.setSetting(SceneNodeSettings.AutoDropDown, eval(setting_value))
+                    continue
                 if key in known_setting_keys:
                     setting_container.setProperty(key, "value", setting_value)
                 else:

plugins/3MFReader/WorkspaceDialog.qml

@@ -366,6 +366,7 @@ UM.Dialog
                     }
                     function reloadValue()
                     {
+                        manager.manager.setDropToBuildPlateForModel(checkDropModels.checked)
                         checkDropModels.checked = UM.Preferences.getValue("physics/automatic_drop_down")
                     }
                 }

plugins/3MFWriter/ThreeMFWriter.py

@@ -155,6 +155,7 @@ class ThreeMFWriter(MeshWriter):
 
         if isinstance(um_node, CuraSceneNode):
             savitar_node.setSetting("cura:print_order", str(um_node.printOrder))
+            savitar_node.setSetting("cura:drop_to_buildplate", str(um_node.isDropDownEnabled))
 
         # Store the metadata.
         for key, value in um_node.metadata.items():