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** This file is part of the QtDeclarative module of the Qt Toolkit.

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

#ifndef QDECLARATIVEPARTICLES_H

#define QDECLARATIVEPARTICLES_H

#include <QtDeclarative/qdeclarativeitem.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QDeclarativeParticle;

class QDeclarativeParticles;

class QDeclarativeParticleMotion : public QObject

{

    Q_OBJECT

public:

    QDeclarativeParticleMotion(QObject *parent=0);

    virtual void advance(QDeclarativeParticle &, int interval);

    virtual void created(QDeclarativeParticle &);

    virtual void destroy(QDeclarativeParticle &);

};

class QDeclarativeParticleMotionLinear : public QDeclarativeParticleMotion

{

    Q_OBJECT

public:

    QDeclarativeParticleMotionLinear(QObject *parent=0)

        : QDeclarativeParticleMotion(parent) {}

    virtual void advance(QDeclarativeParticle &, int interval);

};

class QDeclarativeParticleMotionGravity : public QDeclarativeParticleMotion

{

    Q_OBJECT

    Q_PROPERTY(qreal xattractor READ xAttractor WRITE setXAttractor NOTIFY xattractorChanged)

    Q_PROPERTY(qreal yattractor READ yAttractor WRITE setYAttractor NOTIFY yattractorChanged)

    Q_PROPERTY(qreal acceleration READ acceleration WRITE setAcceleration NOTIFY accelerationChanged)

public:

    QDeclarativeParticleMotionGravity(QObject *parent=0)

        : QDeclarativeParticleMotion(parent), _xAttr(0.0), _yAttr(0.0), _accel(0.00005) {}

    qreal xAttractor() const { return _xAttr; }

    void setXAttractor(qreal x);

    qreal yAttractor() const { return _yAttr; }

    void setYAttractor(qreal y);

    qreal acceleration() const { return _accel * 1000000; }

    void setAcceleration(qreal accel);

    virtual void advance(QDeclarativeParticle &, int interval);

Q_SIGNALS:

    void xattractorChanged();

    void yattractorChanged();

    void accelerationChanged();

private:

    qreal _xAttr;

    qreal _yAttr;

    qreal _accel;

};

class QDeclarativeParticleMotionWander : public QDeclarativeParticleMotion

{

    Q_OBJECT

public:

    QDeclarativeParticleMotionWander()

        : QDeclarativeParticleMotion(), particles(0), _xvariance(0), _yvariance(0), _pace(100) {}

    virtual void advance(QDeclarativeParticle &, int interval);

    virtual void created(QDeclarativeParticle &);

    virtual void destroy(QDeclarativeParticle &);

    struct Data {

        qreal x_targetV;

        qreal y_targetV;

        qreal x_peak;

        qreal y_peak;

        qreal x_var;

        qreal y_var;

    };

    Q_PROPERTY(qreal xvariance READ xVariance WRITE setXVariance NOTIFY xvarianceChanged)

    qreal xVariance() const { return _xvariance * 1000.0; }

    void setXVariance(qreal var);

    Q_PROPERTY(qreal yvariance READ yVariance WRITE setYVariance NOTIFY yvarianceChanged)

    qreal yVariance() const { return _yvariance * 1000.0; }

    void setYVariance(qreal var);

    Q_PROPERTY(qreal pace READ pace WRITE setPace NOTIFY paceChanged)

    qreal pace() const { return _pace * 1000.0; }

    void setPace(qreal pace);

Q_SIGNALS:

    void xvarianceChanged();

    void yvarianceChanged();

    void paceChanged();

private:

    QDeclarativeParticles *particles;

    qreal _xvariance;

    qreal _yvariance;

    qreal _pace;

};

class QDeclarativeParticlesPrivate;

class QDeclarativeParticles : public QDeclarativeItem

{

    Q_OBJECT

    Q_PROPERTY(QUrl source READ source WRITE setSource NOTIFY sourceChanged)

    Q_PROPERTY(int count READ count WRITE setCount NOTIFY countChanged)

    Q_PROPERTY(int emissionRate READ emissionRate WRITE setEmissionRate NOTIFY emissionRateChanged)

    Q_PROPERTY(qreal emissionVariance READ emissionVariance WRITE setEmissionVariance NOTIFY emissionVarianceChanged)

    Q_PROPERTY(int lifeSpan READ lifeSpan WRITE setLifeSpan NOTIFY lifeSpanChanged)

    Q_PROPERTY(int lifeSpanDeviation READ lifeSpanDeviation WRITE setLifeSpanDeviation NOTIFY lifeSpanDeviationChanged)

    Q_PROPERTY(int fadeInDuration READ fadeInDuration WRITE setFadeInDuration NOTIFY fadeInDurationChanged)

    Q_PROPERTY(int fadeOutDuration READ fadeOutDuration WRITE setFadeOutDuration NOTIFY fadeOutDurationChanged)

    Q_PROPERTY(qreal angle READ angle WRITE setAngle NOTIFY angleChanged)

    Q_PROPERTY(qreal angleDeviation READ angleDeviation WRITE setAngleDeviation NOTIFY angleDeviationChanged)

    Q_PROPERTY(qreal velocity READ velocity WRITE setVelocity NOTIFY velocityChanged)

    Q_PROPERTY(qreal velocityDeviation READ velocityDeviation WRITE setVelocityDeviation NOTIFY velocityDeviationChanged)

    Q_PROPERTY(QDeclarativeParticleMotion *motion READ motion WRITE setMotion NOTIFY motionChanged)

    Q_CLASSINFO("DefaultProperty", "motion")

public:

    QDeclarativeParticles(QDeclarativeItem *parent=0);

    ~QDeclarativeParticles();

    QUrl source() const;

    void setSource(const QUrl &);

    int count() const;

    void setCount(int cnt);

    int emissionRate() const;

    void setEmissionRate(int);

    qreal emissionVariance() const;

    void setEmissionVariance(qreal);

    int lifeSpan() const;

    void setLifeSpan(int);

    int lifeSpanDeviation() const;

    void setLifeSpanDeviation(int);

    int fadeInDuration() const;

    void setFadeInDuration(int);

    int fadeOutDuration() const;

    void setFadeOutDuration(int);

    qreal angle() const;

    void setAngle(qreal);

    qreal angleDeviation() const;

    void setAngleDeviation(qreal);

    qreal velocity() const;

    void setVelocity(qreal);

    qreal velocityDeviation() const;

    void setVelocityDeviation(qreal);

    QDeclarativeParticleMotion *motion() const;

    void setMotion(QDeclarativeParticleMotion *);

    void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);

public Q_SLOTS:

    void burst(int count, int emissionRate=-1);

protected:

    virtual void componentComplete();

Q_SIGNALS:

    void sourceChanged();

    void countChanged();

    void emissionRateChanged();

    void emissionVarianceChanged();

    void lifeSpanChanged();

    void lifeSpanDeviationChanged();

    void fadeInDurationChanged();

    void fadeOutDurationChanged();

    void angleChanged();

    void angleDeviationChanged();

    void velocityChanged();

    void velocityDeviationChanged();

    void emittingChanged();

    void motionChanged();

private Q_SLOTS:

    void imageLoaded();

private:

    Q_DISABLE_COPY(QDeclarativeParticles)

    Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QDeclarativeParticles)

};

QT_END_NAMESPACE

QML_DECLARE_TYPE(QDeclarativeParticleMotion)

QML_DECLARE_TYPE(QDeclarativeParticleMotionLinear)

QML_DECLARE_TYPE(QDeclarativeParticleMotionGravity)

QML_DECLARE_TYPE(QDeclarativeParticleMotionWander)

QML_DECLARE_TYPE(QDeclarativeParticles)

QT_END_HEADER

#endif