将单击处理程序添加到GWT中的Horizo​​ntalPanel

Question

如何添加点击处理程序HorizontalPanel？

它适用addDomHandler()于较新的GWT版本,但我不得不降级到GWT 2.0.4,这是不支持的.我过去常常这样做:

horizontalPanel.getWidget(1).addDomHandler(someClickHandler,ClickEvent.getType());
//or
horizontalPanel.addDomHandler(someClickHandler, ClickEvent.getType());

Answer 1

使用FocusPanel而不是挂钩本机事件.要捕获整个面板的点击次数:

FocusPanel wrapper = new FocusPanel();
HorizontalPanel panel = new HorizontalPanel();
wrapper.add(panel);
wrapper.addClickHandler(new ClickHandler() {
  @Override
  public void onClick(ClickEvent event) {
    // Handle the click
  }
});

// Add wrapper to the parent widget that previously held panel.

或者在Horizo​​ntalPanel中捕获单元格内的点击:

IsWidget child; // Any widget
HorizontalPanel panel = new HorizontalPanel();
FocusPanel clickBox = new FocusPanel();

clickBox.add(child);
panel.add(clickBox);

clickBox.addClickHandler(...);