qrect

QRect target1(0, 0, realWidth, realHeight/5); QRect target2(0, realHeight/5, realWidth, realHeight/5); QRect target3(0, 2*realHeight/5, realWidth, realHeight/5); QRect target4(0, 3*realHeight/5, realWidth, realHeight/5); QRect target5(0, 4*realHeight/5, realWidth, real...

updateRequest() 信号产生时，调用此函数，接收两个参数：QRect 对象和 dy 像素。若存在垂直滚动且 dy > 0，则向下滚动小部件。滚动后，小部件接收需要重新绘制区域的绘画事件。否则更新小部件内部矩形。判断给定矩形是否位于此矩形内，返回 True 或 False。仅在矩形完全位于此矩形内（不在边上）时返回...