Add warning icon to show which extruder makes the configuration Not Supported

cura/Settings/ExtruderManager.py

@@ -12,6 +12,7 @@ from UM.Scene.SceneNode import SceneNode
 from UM.Scene.Selection import Selection
 from UM.Scene.Iterator.BreadthFirstIterator import BreadthFirstIterator
 from UM.Settings.ContainerRegistry import ContainerRegistry  # Finding containers by ID.
+from cura.Machines.ContainerTree import ContainerTree
 
 from typing import Any, cast, Dict, List, Optional, TYPE_CHECKING, Union
 
@@ -403,6 +404,32 @@ class ExtruderManager(QObject):
                 raise IndexError(msg)
             extruder_stack_0.definition = extruder_definition
 
+    @pyqtSlot("QVariant", result = bool)
+    def getExtruderHasQualityForMaterial(self, extruder_stack: "ExtruderStack") -> bool:
+        """Checks if quality nodes exist for the variant/material combination."""
+        application = cura.CuraApplication.CuraApplication.getInstance()
+        global_stack = application.getGlobalContainerStack()
+        if not global_stack or not extruder_stack:
+            return False
+
+        if not global_stack.getMetaDataEntry("has_materials"):
+            return True
+
+        machine_node = ContainerTree.getInstance().machines[global_stack.definition.getId()]
+
+        active_variant_name = extruder_stack.variant.getMetaDataEntry("name")
+        if active_variant_name not in machine_node.variants:
+            Logger.log("w", "Could not find the variant %s", active_variant_name)
+            return True
+        active_variant_node = machine_node.variants[active_variant_name]
+        active_material_node = active_variant_node.materials[extruder_stack.material.getMetaDataEntry("base_file")]
+
+        active_material_node_qualities = active_material_node.qualities
+        if not active_material_node_qualities:
+            return False
+        return list(active_material_node_qualities.keys())[0] != "empty_quality"
+
+
     @pyqtSlot(str, result="QVariant")
     def getInstanceExtruderValues(self, key: str) -> List:
         """Get all extruder values for a certain setting.

resources/qml/Menus/ConfigurationMenu/ConfigurationMenu.qml

@@ -60,6 +60,27 @@ Cura.ExpandablePopup
                         width: height
                     }
 
+                    // Warning icon that indicates if no qualities are available for the variant/material combination for this extruder
+                    UM.RecolorImage
+                    {
+                        id: configurationWarning
+
+                        property var extruderStack: Cura.MachineManager.activeMachine.extruders[model.index]
+                        property bool valueWarning: !Cura.ExtruderManager.getExtruderHasQualityForMaterial(extruderStack)
+                        property bool valueError: Cura.ContainerManager.getContainerMetaDataEntry(extruderStack.material.id, "compatible", "") != "True"
+
+                        visible: valueWarning || valueError
+
+                        anchors.left: extruderIcon.right
+                        anchors.leftMargin: visible ? UM.Theme.getSize("thin_margin").width : 0
+                        anchors.verticalCenter: parent.verticalCenter
+
+                        source: valueError ? UM.Theme.getIcon("cross2") : UM.Theme.getIcon("warning")
+                        color: valueError ? UM.Theme.getColor("setting_validation_error_background") : UM.Theme.getColor("setting_validation_warning_background")
+                        width: visible ? UM.Theme.getSize("section_icon").width : 0
+                        height: width
+                    }
+
                     // Label for the brand of the material
                     Label
                     {
@@ -74,7 +95,7 @@ Cura.ExpandablePopup
                         anchors
                         {
                             top: extruderIcon.top
-                            left: extruderIcon.right
+                            left: configurationWarning.right
                             leftMargin: UM.Theme.getSize("default_margin").width
                             right: parent.right
                             rightMargin: UM.Theme.getSize("default_margin").width
@@ -95,7 +116,7 @@ Cura.ExpandablePopup
 
                         anchors
                         {
-                            left: extruderIcon.right
+                            left: configurationWarning.right
                             leftMargin: UM.Theme.getSize("default_margin").width
                             top: typeAndBrandNameLabel.bottom
                             right: parent.right