Qt EventFilter 事件过滤器 及传递 鼠标键盘事件捕捉； https://blog.csdn.net/q610098308/article/details/126302939

bool eventFilter(QObject *obj, QEvent *event); void closeEvent(QCloseEvent * event); void mouseMoveEvent ( QMouseEvent * e ); void mousePressEvent ( QMouseEvent * e ); void mouseReleaseEvent ( QMouseEvent * e ); void mouseDoubleClickEvent( QMouseEvent * e );

通过对label为例，对其添加事件过滤器实现相应鼠标的单击和双击操作

安装鼠标点击事件、键盘输入事件的过滤器，输出相关信息到状态栏