java - 检测 sencha ext-gwt 3.0 树中的删除目标节点

Question

上下文:sencha ext-gwt 3.0 (beta3)。我正在使用 dnd 让用户重新排列一棵树，一次一个元素。我可以轻松获取拖动的元素，但没有找到如何获取放置目标。这是我的代码:

final TreeDropTarget<IMyModel> target = new TreeDropTarget<IMyModel>(mytree);
target.setAllowSelfAsSource(true);
target.setAllowDropOnLeaf(true);
target.setFeedback(DND.Feedback.BOTH);
target.addDropHandler(new DndDropEvent.DndDropHandler()
{
  @Override
  public void onDrop(final DndDropEvent event)
  {
    IMyModel dragged = mytree.getSelectionModel().getSelectedItem();

    // TODO get the drop target element!
  }
});

Answer 1

这对我有用:

target.addDropHandler(new DndDropHandler() {
    @Override
    public void onDrop(DndDropEvent event) {
        final TreeNode<MyModel> item = source.getWidget().findNode(event.getDragEndEvent().getNativeEvent().getEventTarget().<Element> cast());
        MyModel newParent = item.getModel();
    }
});