Qt窗口失去焦点关闭/点击窗口外其他地方关闭

点击窗口外其他地方关闭

setWindowFlags(Qt::FramelessWindowHint | Qt::Popup);

窗口失去焦点关闭

1.示例一

bool testWidget::eventFilter(QObject *obj, QEvent *event){if (Q_NULLPTR == obj) {return false;}if (QEvent::ActivationChange == event->type()) {if(QApplication::activeWindow() != this){this->close();}}return QWidget::eventFilter(obj, event);}

2.示例二

bool testWidget::event(QEvent * event){if (QEvent::ActivationChange == event->type()) {if (QApplication::activeWindow() != this){this->close();}}return QWidget::event(event);}