java 向 GWT 中的 HorizontalPanel 添加点击处理程序
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Add a click handler to a HorizontalPanel in GWT
提问by Jason Terk
How do i add click handlers to HorizontalPanel?
我如何将点击处理程序添加到HorizontalPanel？
It worked with the use of addDomHandler()in newer GWT versions, but i had to downgrade to GWT 2.0.4 where this isn't supported. I used to do it like this:
它addDomHandler()在较新的 GWT 版本中使用，但我不得不降级到 GWT 2.0.4，因为它不受支持。我以前是这样做的：
horizontalPanel.getWidget(1).addDomHandler(someClickHandler,ClickEvent.getType());
//or
horizontalPanel.addDomHandler(someClickHandler, ClickEvent.getType());
回答by Jason Terk
Use FocusPanels instead of hooking native events. To catch clicks for the whole panel:
使用 FocusPanels 而不是挂钩本机事件。要捕捉整个面板的点击：
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.
Or to catch clicks inside a cell in the HorizontalPanel:
或者在 HorizontalPanel 中捕捉单元格内的点击：
IsWidget child; // Any widget
HorizontalPanel panel = new HorizontalPanel();
FocusPanel clickBox = new FocusPanel();
clickBox.add(child);
panel.add(clickBox);
clickBox.addClickHandler(...);
