Qt 的坐标系统

    QWidget *q = new QWidget(, Qt::WindowStaysOnTopHint);

    q->setWindowTitle(QObject::tr("父窗口widget"));

    qDebug()<<"x "<<q->x();

    qDebug()<<"y "<<q->y();

    qDebug()<<"framegeometry "<<q->frameGeometry();

    qDebug()<<"geometry "<<q->geometry();

    qDebug()<<"pos "<<q->pos();

    qDebug()<<"rect "<<q->rect();