小编Vad*_*han的帖子

简而言之:这段代码位于main函数中,这很有效.此代码在两个图形元素上执行交换.

        QTimer timer;
        timer.setTimerType(Qt::PreciseTimer);
        timer.setInterval(1000.0/30.0);
        timer.setSingleShot(false);

    // ====================== MOVE 4 in POS of 1 ==========================
        QPointF centre(QLineF(button1->pos(), button4->pos()).pointAt(0.5));
        QPointF positionBut4 = button4->pos();

        MyPointF centreSwap4(0, &positionBut4, &centre);
        button4->myPointF = &centreSwap4;

        QObject::connect(&timer, SIGNAL(timeout()), &centreSwap4, SLOT(updateDownRight()));
        QObject::connect(&centreSwap4, SIGNAL(positionChanged()), button4, SLOT(slotMoveCircle()));

    // ====================== MOVE 4 in POS of 1 ==========================

    // ====================== MOVE 1 in POS of 4 ==========================
        QPointF positionBut1 = button1->pos();

        MyPointF centreSwap1(0, &positionBut1, &centre);
        button1->myPointF = &centreSwap1;

        QObject::connect(&timer, SIGNAL(timeout()), &centreSwap1, SLOT(updateUpLeft()));
        QObject::connect(&centreSwap1, SIGNAL(positionChanged()), button1, SLOT(slotMoveCircle()));
    // ====================== MOVE 1 in POS …