Add a notice to linked materials and allow "unlinking" a material.

cura/Settings/ContainerManager.py

@@ -695,6 +695,7 @@ class ContainerManager(QObject):
         duplicated_container.setDirty(True)
         self._container_registry.addContainer(duplicated_container)
 
+    #  Create a new material by cloning Generic PLA and setting the GUID to something unqiue
     @pyqtSlot(result = str)
     def createMaterial(self) -> str:
         # Ensure all settings are saved.
@@ -702,7 +703,7 @@ class ContainerManager(QObject):
 
         containers = self._container_registry.findInstanceContainers(id="generic_pla")
         if not containers:
-            Logger.log("d", "Unable to creata a new material by cloning generic_pla, because it doesn't exist.")
+            Logger.log("d", "Unable to create a new material by cloning generic_pla, because it doesn't exist.")
             return ""
 
         # Create a new ID & container to hold the data.
@@ -722,6 +723,39 @@ class ContainerManager(QObject):
 
         self._container_registry.addContainer(duplicated_container)
 
+    @pyqtSlot(str, result = "QStringList")
+    def getLinkedMaterials(self, material_id: str):
+        containers = self._container_registry.findInstanceContainers(id=material_id)
+        if not containers:
+            Logger.log("d", "Unable to find materials linked to material with id %s, because it doesn't exist.", material_id)
+            return []
+
+        material_container = containers[0]
+        material_guid = material_container.getMetaDataEntry("GUID", "")
+        if not material_guid:
+            Logger.log("d", "Unable to find materials linked to material with id %s, because it doesn't have a GUID.", material_id)
+            return []
+
+        containers = self._container_registry.findInstanceContainers(type = "material", GUID = material_guid)
+        linked_material_names = []
+        for container in containers:
+            if container.getId() == material_id or container.getMetaDataEntry("base_file") != container.getId():
+                continue
+
+            linked_material_names.append(container.getName())
+        return linked_material_names
+
+    @pyqtSlot(str)
+    def unlinkMaterial(self, material_id: str):
+        containers = self._container_registry.findInstanceContainers(id=material_id)
+        if not containers:
+            Logger.log("d", "Unable to make the material with id %s unique, because it doesn't exist.", material_id)
+            return ""
+
+        containers[0].setMetaDataEntry("base_file", material_id)
+        containers[0].setMetaDataEntry("GUID", str(uuid.uuid4()))
+
+
     ##  Get the singleton instance for this class.
     @classmethod
     def getInstance(cls) -> "ContainerManager":

resources/qml/Preferences/MaterialView.qml

@@ -24,6 +24,16 @@ TabView
     property double spoolLength: calculateSpoolLength()
     property real costPerMeter: calculateCostPerMeter()
 
+    property string linkedMaterialNames:
+    {
+        if(!base.containerId || !base.editingEnabled)
+        {
+            return ""
+        }
+        var linkedMaterials = Cura.ContainerManager.getLinkedMaterials(base.containerId);
+        return linkedMaterials.join(", ");
+    }
+
     Tab
     {
         title: catalog.i18nc("@title","Information")
@@ -196,6 +206,23 @@ TabView
                     height: parent.rowHeight
                 }
 
+                Item { width: parent.width; height: UM.Theme.getSize("default_margin").height; visible: unlinkMaterialButton.visible }
+                Label
+                {
+                    width: parent.width
+                    verticalAlignment: Qt.AlignVCenter
+                    text: catalog.i18nc("@label", "This material is linked to %1 and shares some of its properties.").arg(base.linkedMaterialNames)
+                    wrapMode: Text.WordWrap
+                    visible: unlinkMaterialButton.visible
+                }
+                Button
+                {
+                    id: unlinkMaterialButton
+                    text: catalog.i18nc("@label", "Unlink Material")
+                    visible: base.linkedMaterialNames != ""
+                    onClicked: Cura.ContainerManager.unlinkMaterial(base.containerId)
+                }
+
                 Item { width: parent.width; height: UM.Theme.getSize("default_margin").height }
 
                 Label { width: parent.width; height: parent.rowHeight; verticalAlignment: Qt.AlignVCenter; text: catalog.i18nc("@label", "Description") }