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

#ifndef SCENE_H

#define SCENE_H

//#include <GL/glew.h>

#include "glextensions.h"

#include <QtGui>

#include <QtOpenGL>

#include "roundedbox.h"

#include "gltrianglemesh.h"

#include "trackball.h"

#include "glbuffers.h"

#include "qtbox.h"

#define PI 3.14159265358979

QT_BEGIN_NAMESPACE

class QMatrix4x4;

QT_END_NAMESPACE

class ParameterEdit : public QWidget

{

public:

    virtual void emitChange() = 0;

};

class ColorEdit : public ParameterEdit

{

    Q_OBJECT

public:

    ColorEdit(QRgb initialColor, int id);

    QRgb color() const {return m_color;}

    virtual void emitChange() {emit colorChanged(m_color, m_id);}

public slots:

    void editDone();

signals:

    void colorChanged(QRgb color, int id);

protected:

    virtual void mousePressEvent(QMouseEvent *event);

    void setColor(QRgb color); // also emits colorChanged()

private:

    QGraphicsScene *m_dialogParentScene;

    QLineEdit *m_lineEdit;

    QFrame *m_button;

    QRgb m_color;

    int m_id;

};

class FloatEdit : public ParameterEdit

{

    Q_OBJECT

public:

    FloatEdit(float initialValue, int id);

    float value() const {return m_value;}

    virtual void emitChange() {emit valueChanged(m_value, m_id);}

public slots:

    void editDone();

signals:

    void valueChanged(float value, int id);

private:

    QGraphicsScene *m_dialogParentScene;

    QLineEdit *m_lineEdit;

    float m_value;

    int m_id;

};

class GraphicsWidget : public QGraphicsProxyWidget

{

public:

    GraphicsWidget() : QGraphicsProxyWidget(0, Qt::Window) {}

protected:

    virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);

    virtual void resizeEvent(QGraphicsSceneResizeEvent *event);

    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

};

class TwoSidedGraphicsWidget : public QObject

{

    Q_OBJECT

public:

    TwoSidedGraphicsWidget(QGraphicsScene *scene);

    void setWidget(int index, QWidget *widget);

    QWidget *widget(int index);

public slots:

    void flip();

protected slots:

    void animateFlip();

private:

    GraphicsWidget *m_proxyWidgets[2];

    int m_current;

    int m_angle; // angle in degrees

    int m_delta;

};

class RenderOptionsDialog : public QDialog

{

    Q_OBJECT

public:

    RenderOptionsDialog();

    int addTexture(const QString &name);

    int addShader(const QString &name);

    void emitParameterChanged();

protected slots:

    void setColorParameter(QRgb color, int id);

    void setFloatParameter(float value, int id);

signals:

    void dynamicCubemapToggled(int);

    void colorParameterChanged(const QString &, QRgb);

    void floatParameterChanged(const QString &, float);

    void textureChanged(int);

    void shaderChanged(int);

    void doubleClicked();

protected:

    virtual void mouseDoubleClickEvent(QMouseEvent *event);

    QVector<QByteArray> m_parameterNames;

    QComboBox *m_textureCombo;

    QComboBox *m_shaderCombo;

    QVector<ParameterEdit *> m_parameterEdits;

};

class ItemDialog : public QDialog

{

    Q_OBJECT

public:

    enum ItemType {

        QtBoxItem,

        CircleItem,

        SquareItem,

    };

    ItemDialog();

public slots:

    void triggerNewQtBox();

    void triggerNewCircleItem();

    void triggerNewSquareItem();

signals:

    void doubleClicked();

    void newItemTriggered(ItemDialog::ItemType type);

protected:

    virtual void mouseDoubleClickEvent(QMouseEvent *event);

};

class Scene : public QGraphicsScene

{

    Q_OBJECT

public:

    Scene(int width, int height, int maxTextureSize);

    ~Scene();

    virtual void drawBackground(QPainter *painter, const QRectF &rect);

public slots:

    void setShader(int index);

    void setTexture(int index);

    void toggleDynamicCubemap(int state);

    void setColorParameter(const QString &name, QRgb color);

    void setFloatParameter(const QString &name, float value);

    void newItem(ItemDialog::ItemType type);

protected:

    void renderBoxes(const QMatrix4x4 &view, int excludeBox = -2);

    void setStates();

    void setLights();

    void defaultStates();

    void renderCubemaps();

    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);

    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);

    virtual void wheelEvent(QGraphicsSceneWheelEvent * event);

private:

    void initGL();

    QPointF pixelPosToViewPos(const QPointF& p);

    QTime m_time;

    int m_lastTime;

    int m_mouseEventTime;

    int m_distExp;

    int m_frame;

    int m_maxTextureSize;

    int m_currentShader;

    int m_currentTexture;

    bool m_dynamicCubemap;

    bool m_updateAllCubemaps;

    RenderOptionsDialog *m_renderOptions;

    ItemDialog *m_itemDialog;

    QTimer *m_timer;

    GLRoundedBox *m_box;

    TrackBall m_trackBalls[3];

    QVector<GLTexture *> m_textures;

    GLTextureCube *m_environment;

    GLTexture3D *m_noise;

    GLRenderTargetCube *m_mainCubemap;

    QVector<GLRenderTargetCube *> m_cubemaps;

    QVector<QGLShaderProgram *> m_programs;

    QGLShader *m_vertexShader;

    QVector<QGLShader *> m_fragmentShaders;

    QGLShader *m_environmentShader;

    QGLShaderProgram *m_environmentProgram;

};

#endif