[英]Handle DIV add child node event with GWT
Is there such a thing in GWT to handle event when elements are added to a specific DIV? 当元素添加到特定的DIV中时,GWT中是否有处理事件的东西?
From this answer there is jQuery solution: 从这个答案有jQuery的解决方案:
Fire jQuery event on div change 在div更改时触发jQuery事件
$('body').on('DOMNodeInserted', '#common-parent', function(e) {
if ($(e.target).attr('class') === 'myClass') {
console.log('hit');
}
});
You can integrate jquery method by using jsni. 您可以使用jsni集成jquery方法。
At first you need to create corresponding gwt like event: 首先,您需要创建相应的gwt like事件:
package com.test.gwt;
import com.google.gwt.event.shared.GwtEvent;
public class DOMNodeInsertedEvent extends GwtEvent<DOMNodeInsertedEventHandler> {
public static Type<DOMNodeInsertedEventHandler> TYPE = new Type<DOMNodeInsertedEventHandler>();
public Type<DOMNodeInsertedEventHandler> getAssociatedType() {
return TYPE;
}
protected void dispatch(DOMNodeInsertedEventHandler handler) {
handler.onDOMNodeInserted(this);
}
}
and gwt like handler: 和gwt一样的处理程序:
package com.test.gwt;
import com.google.gwt.event.shared.EventHandler;
public interface DOMNodeInsertedEventHandler extends EventHandler {
void onDOMNodeInserted(DOMNodeInsertedEvent event);
}
then implement jsni wrapping function 然后实现jsni包装功能
public native void addDOMNodeInsertedEventHandler(Widget widget, Element element)/*-{
$wnd.$(element).bind('DOMNodeInserted', function (event) {
var gwtEvent = @com.test.gwt.DOMNodeInsertedEvent::new()();
widget.@com.google.gwt.user.client.ui.Widget::fireEvent(Lcom/google/gwt/event/shared/GwtEvent;)(gwtEvent);
});
}-*/;
and at last add your handler to corresponding panel 最后将您的处理程序添加到相应的面板
FlowPanel flowPanel = new FlowPanel();
flowPanel.addHandler(new DOMNodeInsertedEventHandler() {
@Override
public void onDOMNodeInserted(DOMNodeInsertedEvent event) {
Window.alert("Inserted");
}
}, DOMNodeInsertedEvent.TYPE);
addDOMNodeInsertedEventHandler(flowPanel, flowPanel.getElement());
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