#ifndef IDROPSHADOWABLE_H
#define IDROPSHADOWABLE_H

#include <QList>
#include <QSize>
#include <QColor>
#include <QWidget>
#include <QDebug>
struct BoxShadow
{
    int x;
    int y;
    int radius;
    int spread;
    QColor color;
    QSize boxSize;
    QImage image;
    //BoxShadow():x(0),y(0),radius(0),spread(0),color(QColor()),boxSize(QSize()){}
    bool operator==(const BoxShadow &rhs) const
    {
        return (this->radius == rhs.radius)
                &&(this->spread == rhs.spread)
                &&(this->color == rhs.color)
                &&(this->boxSize == rhs.boxSize);
    }
    bool operator<(const BoxShadow &rhs) const
    {
        /*----------------------------------------------------------------
         * QMap中通过<运算符来比较两个参数是否相等
         * 即通过a<b来判断是否相等，若小于成立，则说明不相等，便会插入；
         * 若小于不成立，则说明要么大于，要么等于；
         * 然后再反过来比较一次，即b<a，若这次小于成立，则b>a，则说明它们不相等，便会插入，否则相等。
        ----------------------------------------------------------------*/
        if((this->radius == rhs.radius)
            &&(this->spread == rhs.spread)
            &&(this->color == rhs.color)
            &&(this->boxSize == rhs.boxSize))
        {
            return false;
        }
        else 
        {
            return true;    
        }
        //return this->radius < rhs.radius;
    }
    friend QDebug operator<<(QDebug debug, const BoxShadow &boxShadow)
    {
//        QString info = QString("[x: %1][y: %2][radius: %3][spread: %4][size: (%5,%6)]")
//                .arg(boxShadow.x).arg(boxShadow.y).arg(boxShadow.radius).arg(boxShadow.spread)
//                .arg(boxShadow.boxSize.width()).arg(boxShadow.boxSize.height());
        debug << QString("(%1,%2)").arg(boxShadow.x).arg(boxShadow.y)
              <<boxShadow.color<<boxShadow.radius<<boxShadow.spread<<boxShadow.boxSize;
        return debug;
    }
};
Q_DECLARE_METATYPE(BoxShadow);

class IDropShadowable
{
public:
    IDropShadowable(){}
    IDropShadowable(QWidget *selfWidget);
protected:
    void SetDropShadow(const BoxShadow &boxShadow, const QSize &size);
    void SetDropShadows(const QList<BoxShadow> &shadows, const QSize &size);
    void ClearDropShadow();
private:
    QWidget *m_pSelfWidget;
    QList<BoxShadow> m_listShadows;
public:
    void PaintShadows();
};

#endif // IDROPSHADOWABLE_H