MouseHover-当鼠标指针悬停在控件上时发生MouseLeave-鼠标指针离开控件时发生MouseMove -当鼠标指针移动到控件上时MouseUp-当鼠标指针在控件上方并且鼠标按钮被释放时发生MouseWheel
contents.sendInputEvent(event) event目的type串(所需)-的事件的类型,可以是mouseDown,mouseUp,mouseEnter,mouseLeave,contextMenu,mouseWheel