Fix renaming custom profile

CURA-6842

cura/Machines/MachineNode.py

@@ -142,6 +142,7 @@ class MachineNode(ContainerNode):
                                                            parent = CuraApplication.getInstance())
             elif groups_by_name[name].intent_category == "default":  # Intent category should be stored as "default" if everything is default or as the intent if any of the extruder have an actual intent.
                 groups_by_name[name].intent_category = quality_changes.get("intent_category", "default")
+
             if "position" in quality_changes:  # An extruder profile.
                 groups_by_name[name].metadata_per_extruder[int(quality_changes["position"])] = quality_changes
             else:  # Global profile.

cura/Machines/Models/QualityManagementModel.py

@@ -87,11 +87,23 @@ class QualityManagementModel(ListModel):
         application = cura.CuraApplication.CuraApplication.getInstance()
         container_registry = application.getContainerRegistry()
         new_name = container_registry.uniqueName(new_name)
-        global_container = cast(InstanceContainer, container_registry.findContainers(id = quality_changes_group.metadata_for_global["id"])[0])
-        global_container.setName(new_name)
+        # CURA-6842
+        # FIXME: setName() will trigger metaDataChanged signal that are connected with type Qt.AutoConnection. In this
+        # case, setName() will trigger direct connections which in turn causes the quality changes group and the models
+        # to update. Because multiple containers need to be renamed, and every time a container gets renamed, updates
+        # gets triggered and this results in partial updates. For example, if we rename the global quality changes
+        # container first, the rest of the system still thinks that I have selected "my_profile" instead of
+        # "my_new_profile", but an update already gets triggered, and the quality changes group that's selected will
+        # have no container for the global stack, because "my_profile" just got renamed to "my_new_profile". This results
+        # in crashes because the rest of the system assumes that all data in a QualityChangesGroup will be correct.
+        #
+        # Renaming the container for the global stack in the end seems to be ok, because the assumption is mostly based
+        # on the quality changes container for the global stack.
         for metadata in quality_changes_group.metadata_per_extruder.values():
             extruder_container = cast(InstanceContainer, container_registry.findContainers(id = metadata["id"])[0])
             extruder_container.setName(new_name)
+        global_container = cast(InstanceContainer, container_registry.findContainers(id=quality_changes_group.metadata_for_global["id"])[0])
+        global_container.setName(new_name)
 
         quality_changes_group.name = new_name
 

cura/Machines/QualityChangesGroup.py

@@ -3,7 +3,7 @@
 
 from typing import Any, Dict, Optional
 
-from PyQt5.QtCore import QObject, pyqtProperty
+from PyQt5.QtCore import QObject, pyqtProperty, pyqtSignal
 
 
 ##  Data struct to group several quality changes instance containers together.
@@ -22,7 +22,14 @@ class QualityChangesGroup(QObject):
         self.metadata_for_global = {}    # type: Dict[str, Any]
         self.metadata_per_extruder = {}  # type: Dict[int, Dict[str, Any]]
 
-    @pyqtProperty(str, constant = True)
+    nameChanged = pyqtSignal()
+
+    def setName(self, name: str) -> None:
+        if self._name != name:
+            self._name = name
+            self.nameChanged.emit()
+
+    @pyqtProperty(str, fset = setName, notify = nameChanged)
     def name(self) -> str:
         return self._name