如何使用 Quartz 事件处理鼠标单击？
我有一个 CGEventTap ，我想观察和处理所有系统鼠标单击事件。检测鼠标单击事件很容易，但我不希望系统的其余部分处理某些单击。我不知道怎么办。
系统仅发送低级事件，例如 mouseUp、mouseDown、mouseDragged 等。当我收到 mouseDown 事件时，我不知道它是否是鼠标单击的一部分，也可能是拖动事件。我必须等待以下事件 - 如果它是 mouseUp，我就会单击。但是，如果我想自己处理点击并防止它进入事件队列的其余部分，我不能简单地窃取 mouseUp 事件，就像之前的 mouseDown 已发送。
我以为我可以延迟 mouseDown 事件，只在收到相应的 mouseUp 后才发送它，但这感觉不对，我不想延迟所有系统 mouseDown 事件只是因为我的应用程序。我错过了什么吗？
I have a CGEventTap and I would like to observe and process all system mouse click events. Detecting a mouse click event is easy, but I don’t want some of the clicks to get processed by the rest of the system. And I can’t figure out how.
The system only sends low-level events like mouseUp, mouseDown, mouseDragged and so on. When I receive a mouseDown event, I don’t know if it’s a part of a mouse click yet, could be a drag event. I have to wait for the following event – if it’s a mouseUp, I have a click. But if I want to process the click myself and keep it from going down the rest of the event queue, I can’t simply steal the mouseUp event, as the previous mouseDown was already sent.
I thought I could delay the mouseDown event and only send it later after receiving the corresponding mouseUp, but that feels wrong, I don’t want to delay all system mouseDown events just because of my application. Am I missing something?
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你所想的其实是对的。您必须将鼠标按下事件推迟等于鼠标双击速度，应该在 100-500 毫秒左右。例如，用户不会注意到 100 毫秒的延迟。理想情况下，您应该使用 Mac OS X 鼠标设置中的值，以获得良好的用户体验。
What you thought is actually right. You have to postpone mouse down event for the time interval equal to a mouse double click speed, that should be around 100-500 milliseconds. User will not notice a 100 millisecond delay, for example. Ideally, you should a value from Mac OS X mouse settings to make a good user experience.