Fix Olsson Block binding in UM2 machine settings

CURA-4897

plugins/UltimakerMachineActions/UM2UpgradeSelection.py

@@ -2,7 +2,6 @@
 # Uranium is released under the terms of the LGPLv3 or higher.
 
 from UM.Settings.ContainerRegistry import ContainerRegistry
-from UM.Settings.InstanceContainer import InstanceContainer
 from cura.MachineAction import MachineAction
 from PyQt5.QtCore import pyqtSlot, pyqtSignal, pyqtProperty
 
@@ -11,8 +10,6 @@ from UM.Application import Application
 from UM.Util import parseBool
 catalog = i18nCatalog("cura")
 
-import UM.Settings.InstanceContainer
-
 
 ##  The Ultimaker 2 can have a few revisions & upgrades.
 class UM2UpgradeSelection(MachineAction):
@@ -22,18 +19,29 @@ class UM2UpgradeSelection(MachineAction):
 
         self._container_registry = ContainerRegistry.getInstance()
 
+        self._current_global_stack = None
+
+        from cura.CuraApplication import CuraApplication
+        CuraApplication.getInstance().globalContainerStackChanged.connect(self._onGlobalStackChanged)
+        self._reset()
+
     def _reset(self):
         self.hasVariantsChanged.emit()
 
+    def _onGlobalStackChanged(self):
+        if self._current_global_stack:
+            self._current_global_stack.metaDataChanged.disconnect(self._onGlobalStackMetaDataChanged)
+
+        self._current_global_stack = Application.getInstance().getGlobalContainerStack()
+        if self._current_global_stack:
+            self._current_global_stack.metaDataChanged.connect(self._onGlobalStackMetaDataChanged)
+        self._reset()
+
+    def _onGlobalStackMetaDataChanged(self):
+        self._reset()
+
     hasVariantsChanged = pyqtSignal()
 
-    @pyqtProperty(bool, notify = hasVariantsChanged)
-    def hasVariants(self):
-        global_container_stack = Application.getInstance().getGlobalContainerStack()
-        if global_container_stack:
-            return parseBool(global_container_stack.getMetaDataEntry("has_variants", "false"))
-
-    @pyqtSlot(bool)
     def setHasVariants(self, has_variants = True):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
@@ -62,3 +70,9 @@ class UM2UpgradeSelection(MachineAction):
                 global_container_stack.extruders["0"].variant = ContainerRegistry.getInstance().getEmptyInstanceContainer()
 
             Application.getInstance().globalContainerStackChanged.emit()
+            self._reset()
+
+    @pyqtProperty(bool, fset = setHasVariants, notify = hasVariantsChanged)
+    def hasVariants(self):
+        if self._current_global_stack:
+            return parseBool(self._current_global_stack.getMetaDataEntry("has_variants", "false"))

plugins/UltimakerMachineActions/UM2UpgradeSelectionMachineAction.qml

@@ -13,6 +13,7 @@ import Cura 1.0 as Cura
 Cura.MachineAction
 {
     anchors.fill: parent;
+
     Item
     {
         id: upgradeSelectionMachineAction
@@ -39,12 +40,19 @@ Cura.MachineAction
 
         CheckBox
         {
+            id: olssonBlockCheckBox
             anchors.top: pageDescription.bottom
             anchors.topMargin: UM.Theme.getSize("default_margin").height
 
             text: catalog.i18nc("@label", "Olsson Block")
             checked: manager.hasVariants
-            onClicked: manager.setHasVariants(checked)
+            onClicked: manager.hasVariants = checked
+
+            Connections
+            {
+                target: manager
+                onHasVariantsChanged: olssonBlockCheckBox.checked = manager.hasVariants
+            }
         }
 
         UM.I18nCatalog { id: catalog; name: "cura"; }