QGraphicsDropShadowEffect的学习

参考：Qt之QGraphicsDropShadowEffect_unknown type name 'qgraphicsdropshadoweffect-CSDN博客

示例1： 

    QWidget w1;
    QPushButton *pushBtn = new QPushButton("test",&w1);
    pushBtn->move(10,10);
    QGraphicsDropShadowEffect *shadowEffect = new QGraphicsDropShadowEffect;
    shadowEffect->setOffset(5, 5);//设置偏移
    shadowEffect->setBlurRadius(5);//设置模糊半径
    shadowEffect->setColor(QColor(0, 0, 200, 200));//设置颜色
    pushBtn->setStyleSheet("QPushButton {background-color: red}");
    pushBtn->setGraphicsEffect(shadowEffect);
    w1.show();

示例2： 

Qt图形特效：QGraphicsDropShadowEffect-CSDN博客

shadowEffect->setOffset(20, 20);//设置偏移

示例3：

    pushBtn = new QPushButton("test",this);
    pushBtn->move(10,10);
    pushBtn->resize(200,100);
    QGraphicsDropShadowEffect *shadowEffect = new QGraphicsDropShadowEffect;
    shadowEffect->setOffset(0, 0);//设置偏移
    shadowEffect->setBlurRadius(15);//设置模糊半径
    shadowEffect->setColor(Qt::red);//设置颜色
    pushBtn->setStyleSheet(".QPushButton{background-color:#FFFFFF;border-radius:6px;}");
    pushBtn->setGraphicsEffect(shadowEffect);