QT知识点

1.QEvent与QMouseEvent之间转换

QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
 
QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);

2.QT鼠标在窗口Move

qt默认的MouseMove事件是要在鼠标左键按下才触发，要想鼠标左键不按下，滑动到上面就触发，需要在构造函数里加入

setMouseTracking(true);