Description David Song 2013-09-02 05:47:29 EDT

the code is:

Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
DragSource source = new DragSource(sourseTable, DND.DROP_MOVE | DND.DROP_COPY);
		source.setTransfer(types);
		source.addDragListener(new DragSourceAdapter() {
		  public void dragSetData(DragSourceEvent event) {
		    DragSource ds = (DragSource) event.widget;
		    Table table = (Table) ds.getControl();
		    TableItem[] selection = table.getSelection();

		    StringBuffer buff = new StringBuffer();
		    for (int i = 0, n = selection.length; i < n; i++) {
		      buff.append(selection[i].getText());
		    }
		    event.data = buff.toString();
		  }
		});

DropTarget target = new DropTarget(targentTable, DND.DROP_MOVE | DND.DROP_COPY );
		target.setTransfer(types);
		target.addDropListener(new DropTargetAdapter(){
			public void dragEnter(DropTargetEvent event) {
				if (event.detail != DND.DROP_DEFAULT) {
					event.detail = (event.operations & DND.DROP_COPY) != 0 ? DND.DROP_COPY : DND.DROP_NONE;
				}
				for (int i = 0, n = event.dataTypes.length; i < n; i++) {
					if (TextTransfer.getInstance().isSupportedType(event.dataTypes[i])) {
						event.currentDataType = event.dataTypes[i];
					}
				}
			}
			
			public void dragOver(DropTargetEvent event) {
			    event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
			}

			public void drop(DropTargetEvent event) {
				  if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
					  DropTarget target = (DropTarget) event.widget;
					  Table table = (Table) target.getControl();
					  String data = (String) event.data;
					  TableItem item = new TableItem(table, SWT.NONE);
					  item.setText(new String[] { data });
					  //remove the tableitem you drag
					  table.remove(table.getSelectionIndex());
				  }
			}
		});


and the error info is :

Error: TypeError: Object # has no method 'indexOf'

  Stack: TypeError: Object # has no method 'indexOf'
    at rwt.qx.Class.define.members._getScrollDirection (http://localhost:10080/rwt-resources/rap-client.js:54342:47)
    at rwt.qx.Class.define.members._onScrollTimer (http://localhost:10080/rwt-resources/rap-client.js:54353:25)
    at rwt.qx.Class.define.members._dispatchEvent (http://localhost:10080/rwt-resources/rap-client.js:6261:18)
    at rwt.qx.Class.define.members.dispatchEvent (http://localhost:10080/rwt-resources/rap-client.js:6191:12)
    at rwt.qx.Class.define.members._oninterval (http://localhost:10080/rwt-resources/rap-client.js:6902:16)
    at wrap (http://localhost:10080/rwt-resources/rap-client.js:5725:25)
  Debug: on