QT笔记-QPush不规则画图与点击

    {

        QMatrix leftmatrix;

        leftmatrix.rotate(123);

        //163,163为原始分辨率，这里稍做了调整。

        QPixmap pixmap(":/image/StartDown.png");//pixmap.transformed(leftmatrix,Qt::SmoothTransformation);;//

        QPixmap fitpixmap=pixmap.transformed(leftmatrix,Qt::SmoothTransformation);;//pixmap.scaled(110,82).scaled(110, 70, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);

        ui->pushButton_cup->setIcon(QIcon(fitpixmap));//  QIcon(":/image/StartDown.png"));

        ui->pushButton_cup->setIconSize(QSize(fitpixmap.size()));

        ui->pushButton_cup->setFlat(true);//就是这句能够实现按钮透明，用png图片时很有用

        ui->pushButton_cup->setStyleSheet("border: 0px");//消除边框，取消点击效果

//        QPixmap pixmapLeft(":/image/StartDown.png");

//        pixmapLeft  = pixmapLeft.transformed(leftmatrix,Qt::SmoothTransformation);

        ui->pushButton_cup->resize(fitpixmap.size());

        ui->pushButton_cup->setMask(fitpixmap.mask());

    }