GraphicsView实现图元旋转拉伸的简单例子 [复制链接]

抽空整理下以前自己写的在GraphicsView得框架下实现了图元的旋转拉伸等功能，有偿共享代码，备注留下你的邮箱，在QT4及QT5下运行
    if(!scaled) scaled = true;     float xDistance;     float yDistance;     xDistance = currentVector.x() - StartPoint.x();     if (StartPoint.x() < PivotPoint.x())     {       xDistance = xDistance * -1;    }    yDistance = currentVector.y() - StartPoint.y();     if (StartPoint.y() < PivotPoint.y())     {       yDistance = yDistance * -1;    }    float xFactor;    float yFactor;    xFactor = xDistance / sceneBoundingRect().width();    yFactor = yDistance / sceneBoundingRect().height();    xFactor = 1 + xFactor;    yFactor = 1 + yFactor;    if (shift)      if ((yFactor !=0) && (xFactor !=0))        yFactor = xFactor;    applyTransform(0,xFactor,yFactor);