| 1234567891011121314151617181920 | #include "OneShadowEffect.h"OneShadowEffect::OneShadowEffect(QObject *parent, int radius)    : QGraphicsDropShadowEffect(parent){    init(radius);}OneShadowEffect::~OneShadowEffect(){}void OneShadowEffect::init(int radius){    setBlurRadius(radius);              // 模糊半径    setColor(QColor(0, 0, 0, 90));      // 阴影的颜色    setOffset(0, 0);                    // 水平和垂直偏移量}
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