qDebug()<<"mouse clicked";
QPoint pos(403,34);
QMouseEvent event0(QEvent::MouseButtonPress, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
QApplication::sendEvent(widget, &event0);
QMouseEvent event1(QEvent::MouseButtonRelease, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
QApplication::sendEvent(widget, &event1);
widget为需要通知的部件或界面