我一直在通过" http://dev.sencha.com/deplove/gxt-3.0.0-rc2/javadoc/gxt/com/sencha/gxt/widget/core/client/tree/Tree.html" rel=“nofollow”>GXT3 s Tree API ,寻找某种方法,在我点击或双击树上的节点时执行一项动作,我似乎找不到任何可行的东西。
我知道 TreeGrid 有 CellClickHandler 和 CellDoubleClick 处理器, 但对于 Tree 来说似乎没有什么相似之处。 从 元件 继承的通用 addHandler 方法似乎适用于整个树, 而不是特定的节点 。
有我忽略的东西吗? 还是用不同/更好的方法来做?
使用 TreePanel 的选择模式:
treePanel.getSelectionModel().addSelectionChangedListener(
new SelectionChangedListener<BaseTreeModel>() {
@Override
public void selectionChanged(SelectionChangedEvent<BaseTreeModel> se) {
BaseTreeModel selectedItem = se.getSelectedItem();
// implement functionality
}
}
);
此选项用于单选
tree.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
tree.getSelectionModel().addSelectionHandler(new SelectionHandler<MenuView.MenuDto>() {
public void onSelection(SelectionEvent<MenuDto> event) {
MenuDto mnu = event.getSelectedItem();
Info.display("Tree Handler", mnu.getDescripcion());
}
});
用于多个选择
tree.getSelectionModel().addSelectionChangedHandler(new SelectionChangedHandler<MenuView.MenuDto>() {
public void onSelectionChanged(SelectionChangedEvent<MenuDto> event) {
List<MenuDto> mnus = event.getSelection();
Info.display("Tree Handler", mnus.get(0).getDescripcion());
}
});
另一个选项是覆盖 DoubleClick (或 Click) 方法上的树 s :
Tree tree = new Tree<MyModel, String>(store, valueProvider){
@Override
protected void onDoubleClick(Event event) {
TreeNode<MyModel> node = findNode(event.getEventTarget().<Element> cast());
Info.display("Double Click", "You double clicked this node!");
super.onDoubleClick(event);
}
};
这可以通过使用“细胞行动树”来实现,其实施情况如下:http://www.sencha.com/examples/#ExamplePlace:cellactiontree” rel=“nofollow”>http://www.sencha.com/examples/#ExamplePlace:cellactiontree
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