是否有可能在dblclick事件中检测到ctrl键状态 [英] Is it possible to detect ctrl key state on dblclick event

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问题描述

我使用的是Google地图API版本3.我希望我的双击事件处理程序按如下方式工作:

  google .maps.event.addListener(map,'dblclick',function(e){
if(/ * ctrl is pressed * /){
doSomething(e)
} else {
doSomethingElse(e)
}
});

它看起来事件处理程序只提供一个MouseEvent,它不包含有关键盘状态的信息。我需要LatLng信息,所以我怀疑我可以使用JQuery的事件处理。

我在这里运气不好吗?

解决方案

您可以缓存控制键状态

  var ctrlPressed = false; 
函数cacheIt(event){
ctrlPressed = event.ctrlKey;
}
document.onkeydown = cacheIt;
document.onkeyup = cacheIt;

现在, ctrlPressed 应始终反映是或不是控制键关闭。


I am using Google maps API version 3. I would like my double click event handler to work as follows:

google.maps.event.addListener(map, 'dblclick', function(e) {
  if (/* ctrl is pressed */) {
    doSomething(e)
  } else {
    doSomethingElse(e)
  }
});

It looks the the event handler only provides a MouseEvent which does not contain information about the keyboard state. I need the LatLng information so I doubt that I can use JQuery's event handling.

Am I out of luck here?

解决方案

You could just cache the control key state

var ctrlPressed = false;
function cacheIt(event) {
    ctrlPressed = event.ctrlKey;
}
document.onkeydown = cacheIt;
document.onkeyup = cacheIt;

Now, ctrlPressed should always reflect whether or not the control key is down.

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