Hi, I try the following codes to track the mouse outside the application, and when the mouse enters a specific rect (just enter, no click), show the application mainwindow; and move the mainwindow out of the screen when the mouse leave tha specific area:
Qt Code: 
  1. void MainWindow::mouseMoveEvent(QMouseEvent *event)
  2. {
  3.     qDebug() << "mouse move tracked!!";
  4.     QPoint mousePoint = event->globalPos();
  5.     int x = mousePoint.x();
  6.     int y = mousePoint.y();
  7.     qDebug() << x << ',' << y;
  8.     QRect deskRect = screen.screenGeometry();
  9.     int width = this->frameGeometry().width();
  10.     int height = this->frameGeometry().height();
  11.     if(x > (deskRect.width() - width) && y < 5)
  12.     {
  13.         this->move(deskRect.width() - width, 0);
  14.         event->accept();
  15. //        return;
  16.     }
  17.     if(x < (deskRect.width() - width) || y > height)
  18.     {
  19.         this->move(deskRect.width() - width, -height);
  20.         event->accept();
  21.     }
  22. }
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But the problem is, when I move the mouse outside the mainwindow, there is no MouseMoveEvent, and this function is never called.
why??