qt 鼠标在窗体外点击 窗体自动关闭

QCoreApplication* a = QApplication::instance();

if (a) 

    a->installEventFilter(this);

在application中注册事件过滤

然后重载

bool eventFilter(QObject* watched, QEvent *event) 

在eventFilter函数中:

bool YourWindowOrDialog::eventFilter(QObject* watched, QEvent *event) 

{

     if (event->type() == QEvent::MouseButtonPress) {

          QRect rect = rect();

          QMouseEvent* e = dynamic_cast<QMouseEvent*>(event);

          QPoint pos = mapFromGlobale->globalPos());

           if (e && !rect.contains(pos)) {

                 close();

           }

     }

     return QWidget::eventFilter(watched, event);

}