https://stackoverflow.com/questions/6325558/cocoa-screen-not-refreshing-after-cgeventpost-mouse-click
https://stackoverflow.com/questions/7212483/how-do-i-get-the-mouse-position-on-click-when-it-is-outside-of-the-component
https://www.keakon.net/2011/11/10/%E7%9B%91%E5%90%ACMacOSX%E7%9A%84%E5%85%A8%E5%B1%80%E9%BC%A0%E6%A0%87%E4%BA%8B%E4%BB%B6