protected override DragAndDropVisualMode HandleDragAndDrop(DragAndDropArgs args)
 {
     if (args.dragAndDropPosition == DragAndDropPosition.UponItem)
     {
         if (args.performDrop)
         {
             var targetBundle = (args.parentItem as AssetBundleState.BundleInfo.TreeItem).bundle;
             if (targetBundle != null)
             {
                 AssetBundleState.MoveAssetsToBundle(DragAndDrop.paths.Select(a => AssetBundleState.GetAsset(a)), targetBundle.m_name);
                 SelectionChanged(GetSelection());
             }
         }
         return(DragAndDropVisualMode.Move);
     }
     else
     {
         if (args.performDrop)
         {
             AssetBundleState.StartABMoveBatch();
             foreach (var a in DragAndDrop.paths)
             {
                 if (AssetDatabase.GetMainAssetTypeAtPath(a) == typeof(SceneAsset))
                 {
                     var bundle = AssetBundleState.GetBundle(System.IO.Path.GetFileNameWithoutExtension(a).ToLower());
                     AssetBundleState.MoveAssetsToBundle(new AssetBundleState.AssetInfo[] { AssetBundleState.GetAsset(a) }, bundle.m_name);
                 }
             }
             AssetBundleState.EndABMoveBatch();
             return(DragAndDropVisualMode.Move);
         }
     }
     return(DragAndDropVisualMode.Move);
 }
        protected override DragAndDropVisualMode HandleDragAndDrop(DragAndDropArgs args)
        {
            if (m_data == null)
            {
                return(DragAndDropVisualMode.Rejected);
            }

            if (args.performDrop)
            {
                AssetBundleState.StartABMoveBatch();
                foreach (var b in m_data.m_bundles)
                {
                    AssetBundleState.MoveAssetsToBundle(DragAndDrop.paths.Select(a => AssetBundleState.GetAsset(a)), b.m_name);
                }
                AssetBundleState.EndABMoveBatch();
                SetSelectedBundles(m_data.m_bundles);
            }

            return(DragAndDropVisualMode.Move);
        }