如何使用GWT和Chrome捕捉Zoom事件 [英] How to catch Zoom event with GWT and Chrome

问题描述

我见过关于如何在浏览器中获取当前缩放因子的大量讨论，但我还没有发现为什么这个片段在Firefox中，而不是在Chrome中。

  public class MyComposite extends Composite b $ b {
 public MyComposite（）
 {
 HTMLPanel panel = new HTMLPanel（ <小程序> ...< /小程序>中）; 
 panel.addDomHandler（new MouseWheelHandler（）
 {
 @Override 
 public void onMouseWheel（MouseWheelEvent event）
 {
 event.stopPropagation（）; 
 event.preventDefault（）; 
} 
}，MouseWheelEvent.getType（））; 
 initWidget（panel）; 
 
 
 
 
 
 
 $ b在这两种浏览器中，该小程序，滚动不传播给父母（这很好）。当我在div外面滚动时，窗口会滚动（这也是正常的）。
 
 
 
但是当我做 + MouseWheel 时，在Firefox中，缩放事件被处理程序捕获并且不传播，而在Chrome中，处理程序似乎未被调用，并且事件随后被传播。我想停止在Chrome中传播。
 
 
 
 Chrome中有错误还是我做错了？
 
 
最后的提醒：这似乎是Chrome中的一个错误。我提交了一份报告，但似乎并非如此他们的优先事项。如果你偶然发现这篇文章，并且你也想要这个功能，请在该报告中留言，也许它会加快速度...... 
 
I've seen there is much conversation about how to get the current zoom factor in the browser, but I haven't found out why this snippet works in Firefox, and not in Chrome.
public class MyComposite extends Composite
{
  public MyComposite()
  {
    HTMLPanel panel = new HTMLPanel("<applet>...</applet>");
    panel.addDomHandler(new MouseWheelHandler()
    {
        @Override
        public void onMouseWheel(MouseWheelEvent event)
        {
            event.stopPropagation();
            event.preventDefault();
        }
    }, MouseWheelEvent.getType());
    initWidget(panel);
  }
}
In both browsers, when I scroll inside the div containing the applet, the scroll is not propagated to the parent (which is fine). And when I scroll outside of the div, the window is scrolled (which is also fine).

But when I do Ctrl+MouseWheel, in Firefox the zoom event is caught by the handler and not propagated whereas in Chrome the handler seems not to be called, and the event is then propagated. I would like to stop the propagation in Chrome as well.

Is there a bug in Chrome or am I doing something wrong ?
解决方案
Late heads-up : this seems to be a bug in Chrome. I filed a report a couple of years ago but it seems not to be a priority for them. If you stumble upon this post and you want that "feature" too, please leave a message on that report, maybe it will speed up the things...

                        
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