QmlDesigner: Fix drag reset animation after drop on mac

Fixes: QDS-8933
Change-Id: Iab88c996c98e2f1eb01c0282445409411226ff95
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

share/qtcreator/qmldesigner/itemLibraryQmlSources/Assets.qml

@@ -54,7 +54,8 @@ Item {
             root.updateDropExtFiles(drag)
         }
 
-        onDropped: {
+        onDropped: (drag) => {
+            drag.accept()
             rootView.handleExtFilesDrop(root.dropSimpleExtFiles,
                                         root.dropComplexExtFiles,
                                         assetsModel.rootPath())
@@ -198,7 +199,8 @@ Item {
                     root.updateDropExtFiles(drag)
                 }
 
-                onDropped: {
+                onDropped: (drag) => {
+                    drag.accept()
                     rootView.emitExtFilesDrop(root.dropSimpleExtFiles, root.dropComplexExtFiles)
                 }
 

share/qtcreator/qmldesigner/itemLibraryQmlSources/AssetsView.qml

@@ -344,6 +344,7 @@ TreeView {
             let [row, item] = dropArea.__rowAndItem(drag)
 
             if (item) {
+                drag.accept()
                 root.endDropHover(row)
 
                 let dirPath = item.getDirPath()

share/qtcreator/qmldesigner/materialBrowserQmlSource/MaterialBrowser.qml

@@ -503,7 +503,8 @@ Item {
                             materialsSection.highlight = false
                         }
 
-                        onDrop: {
+                        onDrop: (drag) => {
+                            drag.accept()
                             materialsSection.highlight = false
                             rootView.acceptBundleMaterialDrop()
                         }
@@ -587,7 +588,8 @@ Item {
                             highlight = false
                         }
 
-                        onDrop: {
+                        onDrop: (drag) => {
+                            drag.accept()
                             highlight = false
                             rootView.acceptBundleTextureDrop()
                         }

share/qtcreator/qmldesigner/materialBrowserQmlSource/MaterialItem.qml

@@ -51,6 +51,7 @@ Rectangle {
         }
 
         onDropped: (drag) => {
+            drag.accept()
             rootView.acceptTextureDropOnMaterial(index, drag.getDataAsString(drag.keys[0]))
         }
     }

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ComboBox.qml

@@ -69,7 +69,8 @@ StudioControls.ComboBox {
 
         onExited: comboBox.hasActiveHoverDrag = false
 
-        onDropped: {
+        onDropped: (drag) => {
+            drag.accept()
             comboBox.backendValue.commitDrop(dropArea.dropData)
             comboBox.hasActiveHoverDrag = false
         }

src/plugins/qmldesigner/components/navigator/navigatortreemodel.cpp

@@ -636,7 +636,7 @@ bool NavigatorTreeModel::dropMimeData(const QMimeData *mimeData,
         }
     }
 
-    return false; // don't let the view do drag&drop on its own
+    return true;
 }
 
 void NavigatorTreeModel::handleInternalDrop(const QMimeData *mimeData,

src/plugins/qmldesigner/components/navigator/navigatorwidget.cpp

@@ -210,6 +210,7 @@ void NavigatorWidget::dragEnterEvent(QDragEnterEvent *dragEnterEvent)
 
 void NavigatorWidget::dropEvent(QDropEvent *dropEvent)
 {
+    dropEvent->accept();
     const DesignerActionManager &actionManager = QmlDesignerPlugin::instance()
                                                      ->viewManager().designerActionManager();
     actionManager.handleExternalAssetsDrop(dropEvent->mimeData());