Qt Moving code

by tangke <> 2009-06-08

Qt窗口移动代码，该代码可以应用在很多地方，当用户点击窗口并且拖动的时候，该widget会实时的移动到鼠标的位置。

// "offset" is a member variable of type QPoint
void MyWidget::mousePressEvent(QMouseEvent* event)
{
   event->accept(); // do not propagate
   if (isWindow())
       offset = event->globalPos() - pos();
   else
       offset = event->pos();
}
void MyWidget::mouseMoveEvent(QMouseEvent* event)
{
   event->accept(); // do not propagate
   if (isWindow())
       move(event->globalPos() - offset);
   else
       move(mapToParent(event->pos() - offset));
}
void MyWidget::mouseReleaseEvent(QMouseEvent* event)
{
   event->accept(); // do not propagate
   offset = QPoint();
}