Added ungrouping

cura/CuraApplication.py

@@ -427,7 +427,24 @@ class CuraApplication(QtApplication):
         group_node.setParent(self.getController().getScene().getRoot())
         for node in Selection.getAllSelectedObjects():
             node.setParent(group_node)
-            
+    
+    @pyqtSlot()
+    def ungroupSelected(self):
+        ungrouped_nodes = []
+        for node in Selection.getAllSelectedObjects():
+            if node.callDecoration("isGroup" ):
+                children_to_move = []
+                for child in node.getChildren():
+                    if child.getMeshData() is not None:
+                        children_to_move.append(child)
+                       
+                for child in children_to_move:
+                    child.setParent(node.getParent())
+                    child.callDecoration("setConvexHull",None)
+                node.setParent(None)
+                ungrouped_nodes.append(node)
+        for node in ungrouped_nodes:
+            Selection.remove(node)
 
     ##  Add an output device that can be written to.
     #

resources/qml/Actions.qml

@@ -18,6 +18,8 @@ Item {
     property alias deleteObject: deleteObjectAction;
     property alias centerObject: centerObjectAction;
     property alias groupObjects: groupObjectsAction;
+    property alias unGroupObjects:unGroupObjectsAction;
+    
     property alias multiplyObject: multiplyObjectAction;
     property alias splitObject: splitObjectAction;
 
@@ -130,6 +132,13 @@ Item {
         enabled: UM.Scene.numObjectsSelected > 1 ? true: false
     }
 
+    Action
+    {
+        id: unGroupObjectsAction
+        text: qsTr("Ungroup objects");
+        enabled: UM.Scene.isGroupSelected
+    }
+    
     Action {
         id: multiplyObjectAction;
         //: Duplicate object action

resources/qml/Cura.qml

@@ -352,6 +352,11 @@ UM.MainWindow {
         {
             Printer.groupSelected()
         }
+        
+        unGroupObjects.onTriggered:
+        {
+            Printer.ungroupSelected()
+        }
 
         deleteAll.onTriggered: Printer.deleteAll()
         resetAllTranslation.onTriggered: Printer.resetAllTranslation()
@@ -379,6 +384,7 @@ UM.MainWindow {
         MenuItem { action: actions.multiplyObject; }
         MenuItem { action: actions.splitObject; }
         MenuItem { action: actions.groupObjects;}
+        MenuItem { action: actions.unGroupObjects;}
         MenuSeparator { }
         MenuItem { action: actions.deleteAll; }
         MenuItem { action: actions.reloadAll; }