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****************************************************************************/

#ifndef PARTICLE_H
#define PARTICLE_H

#include <QObject>
#include <QDebug>
#include "qsgparticlesystem_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)


class QSGParticlePainter : public QSGItem
{
    Q_OBJECT
    Q_PROPERTY(QSGParticleSystem* system READ system WRITE setSystem NOTIFY systemChanged)
    Q_PROPERTY(QStringList particles READ particles WRITE setParticles NOTIFY particlesChanged)

public:
    explicit QSGParticlePainter(QSGItem *parent = 0);
    virtual void load(QSGParticleData*);
    virtual void reload(QSGParticleData*);
    virtual void setCount(int c);
    virtual int count();
    QSGParticleSystem* system() const
    {
        return m_system;
    }


    QStringList particles() const
    {
        return m_particles;
    }

    int particleTypeIndex(QSGParticleData*);
signals:
    void countChanged();
    void systemChanged(QSGParticleSystem* arg);

    void particlesChanged(QStringList arg);

public slots:
void setSystem(QSGParticleSystem* arg);

void setParticles(QStringList arg)
{
    if (m_particles != arg) {
        m_particles = arg;
        emit particlesChanged(arg);
    }
}
private slots:
    void calcSystemOffset();
protected:
    virtual void reset();
    virtual void componentComplete();

//    virtual QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *){
//        qDebug() << "Shouldn't be here..." << this;
//        return 0;
//    }

    QSGParticleSystem* m_system;
    friend class QSGParticleSystem;
    int m_count;
    bool m_pleaseReset;
    QStringList m_particles;
    QHash<int,int> m_particleStarts;
    int m_lastStart;
    QPointF m_systemOffset;

    template <typename VertexStruct>
    void vertexCopy(VertexStruct &b, const ParticleVertex& a)
    {
        b.x = a.x - m_systemOffset.x();
        b.y = a.y - m_systemOffset.y();
        b.t = a.t;
        b.lifeSpan = a.lifeSpan;
        b.size = a.size;
        b.endSize = a.endSize;
        b.sx = a.sx;
        b.sy = a.sy;
        b.ax = a.ax;
        b.ay = a.ay;
    }

private:
};

QT_END_NAMESPACE
QT_END_HEADER
#endif // PARTICLE_H