void MyInputPanel::mousePressEvent(QMouseEvent *mouseEvent)
{
if(mouseEvent->button() == Qt::LeftButton)
{
//move 用的是 globalPos, 所以，需要要取出本窗口的(0,0)对应的全局坐标
//pos()返回的是父窗口中位置，不能直接用
startPos = mouseEvent->globalPos() - mapToGlobal(QPoint(,)); keyMovePressed = true;
} mouseEvent->accept();
} void MyInputPanel::mouseMoveEvent(QMouseEvent *mouseEvent)
{
if (keyMovePressed)
{
move(mouseEvent->globalPos() - startPos);
} mouseEvent->accept();
} void MyInputPanel::mouseReleaseEvent(QMouseEvent *mouseEvent)
{
keyMovePressed = false; mouseEvent->accept();
} -->