qml: set cursor to busy in ListViewExt by the default delegate drop areas...

until the drop operation finishes

modules/gui/qt/playlist/qml/PlaylistDelegate.qml

@@ -318,5 +318,7 @@ T.Control {
     Widgets.ListViewExt.VerticalDropAreaLayout {
         id: dropAreaLayout
         anchors.fill: parent
+
+        view: delegate.view
     }
 }

modules/gui/qt/widgets/qml/ListViewExt.qml

@@ -119,6 +119,8 @@ ListView {
         property var isDropAcceptable
         property var acceptDrop
 
+        property Item view
+
         readonly property point dragPosition: {
             let area = null
 
@@ -133,6 +135,21 @@ ListView {
             return Qt.point(drag.x, drag.y)
         }
 
+        function commonDrop(targetIndex, drop) {
+            const promise = acceptDrop(targetIndex, drop)
+            if (view) {
+                MainCtx.setCursor(view, Qt.BusyCursor)
+                promise.then(() => {
+                    // NOTE: check view again for the unlikely case it is
+                    //       gone by the time the promise is resolved:
+                    if (view)
+                        MainCtx.unsetCursor(view)
+                })
+            }
+        }
+
+        // NOTE: Nested inline components are not supported in QML as of Qt 6.8
+
         DropArea {
             id: higherDropArea
 
@@ -153,7 +170,7 @@ ListView {
 
             onDropped: (drop) => {
                 console.assert(acceptDrop)
-                acceptDrop(index, drop)
+                commonDrop(index, drop)
             }
         }
 
@@ -177,7 +194,7 @@ ListView {
 
             onDropped: (drop) => {
                 console.assert(acceptDrop)
-                acceptDrop(index + 1, drop)
+                commonDrop(index + 1, drop)
             }
         }
     }

modules/gui/qt/widgets/qml/TableViewDelegate.qml

@@ -291,5 +291,7 @@ T.Control {
     Widgets.ListViewExt.VerticalDropAreaLayout {
         id: dropAreaLayout
         anchors.fill: parent
+
+        view: delegate.ListView.view
     }
 }