Qt 隐藏标题栏可移动升级版

static QPoint last(0,0);
void Display::mousePressEvent(QMouseEvent *event)
{
    if(event->y()<50)
    {
        last = event->globalPos();
        qDebug()<<event->y();
    }
}
void Display::mouseMoveEvent(QMouseEvent *event)
{
    if(event->y()<50)
    {
        int dx = event->globalX() - last.x();
        int dy = event->globalY() - last.y();
        last = event->globalPos();
        move(x()+dx, y()+dy);
    }
}
void Display::mouseReleaseEvent(QMouseEvent *event)
{
    if(event->y()<50)
    {
        int dx = event->globalX() - last.x();
        int dy = event->globalY() - last.y();
        move(x()+dx, y()+dy);
    }
}

static QPoint last(0,0);
void Display::mousePressEvent(QMouseEvent *event)
{
    if(event->y()<TITLESIZE)
    {
        last = event->globalPos();
    }
}
void Display::mouseMoveEvent(QMouseEvent *event)
{
    if(event->y()<TITLESIZE)
    {
        int dx = event->globalX() - last.x();
        int dy = event->globalY() - last.y();
        last = event->globalPos();
        move(x()+dx, y()+dy);
    }
}
void Display::mouseReleaseEvent(QMouseEvent *event)
{
    if(event->y()<TITLESIZE)
    {
        int dx = event->globalX() - last.x();
        int dy = event->globalY() - last.y();
        move(x()+dx, y()+dy);
    }
}