/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the demonstration applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef SCENE_H+
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#define SCENE_H+
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+
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//#include <GL/glew.h>+
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#include "glextensions.h"+
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+
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#include <QtGui>+
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#include <QtOpenGL>+
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+
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#include "roundedbox.h"+
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#include "gltrianglemesh.h"+
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#include "trackball.h"+
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#include "glbuffers.h"+
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#include "qtbox.h"+
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+
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#define PI 3.14159265358979+
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+
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QT_BEGIN_NAMESPACE+
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class QMatrix4x4;+
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QT_END_NAMESPACE+
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+
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class ParameterEdit : public QWidget+
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{+
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public:+
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    virtual void emitChange() = 0;+
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};+
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+
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class ColorEdit : public ParameterEdit+
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{+
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    Q_OBJECT+
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public:+
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    ColorEdit(QRgb initialColor, int id);+
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    QRgb color() const {return m_color;}+
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    virtual void emitChange() {emit colorChanged(m_color, m_id);}+
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public slots:+
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    void editDone();+
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signals:+
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    void colorChanged(QRgb color, int id);+
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protected:+
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    virtual void mousePressEvent(QMouseEvent *event);+
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    void setColor(QRgb color); // also emits colorChanged()+
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private:+
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    QGraphicsScene *m_dialogParentScene;+
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    QLineEdit *m_lineEdit;+
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    QFrame *m_button;+
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    QRgb m_color;+
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    int m_id;+
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};+
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+
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class FloatEdit : public ParameterEdit+
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{+
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    Q_OBJECT+
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public:+
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    FloatEdit(float initialValue, int id);+
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    float value() const {return m_value;}+
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    virtual void emitChange() {emit valueChanged(m_value, m_id);}+
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public slots:+
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    void editDone();+
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signals:+
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    void valueChanged(float value, int id);+
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private:+
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    QGraphicsScene *m_dialogParentScene;+
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    QLineEdit *m_lineEdit;+
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    float m_value;+
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    int m_id;+
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};+
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+
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class GraphicsWidget : public QGraphicsProxyWidget+
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{+
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public:+
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    GraphicsWidget() : QGraphicsProxyWidget(0, Qt::Window) {}+
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protected:+
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    virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);+
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    virtual void resizeEvent(QGraphicsSceneResizeEvent *event);+
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    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);+
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};+
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+
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class TwoSidedGraphicsWidget : public QObject+
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{+
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    Q_OBJECT+
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public:+
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    TwoSidedGraphicsWidget(QGraphicsScene *scene);+
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    void setWidget(int index, QWidget *widget);+
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    QWidget *widget(int index);+
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public slots:+
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    void flip();+
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protected slots:+
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    void animateFlip();+
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private:+
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    GraphicsWidget *m_proxyWidgets[2];+
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    int m_current;+
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    int m_angle; // angle in degrees+
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    int m_delta;+
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};+
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+
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class RenderOptionsDialog : public QDialog+
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{+
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    Q_OBJECT+
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public:+
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    RenderOptionsDialog();+
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    int addTexture(const QString &name);+
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    int addShader(const QString &name);+
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    void emitParameterChanged();+
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protected slots:+
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    void setColorParameter(QRgb color, int id);+
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    void setFloatParameter(float value, int id);+
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signals:+
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    void dynamicCubemapToggled(int);+
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    void colorParameterChanged(const QString &, QRgb);+
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    void floatParameterChanged(const QString &, float);+
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    void textureChanged(int);+
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    void shaderChanged(int);+
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    void doubleClicked();+
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protected:+
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    virtual void mouseDoubleClickEvent(QMouseEvent *event);+
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+
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    QVector<QByteArray> m_parameterNames;+
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    QComboBox *m_textureCombo;+
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    QComboBox *m_shaderCombo;+
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    QVector<ParameterEdit *> m_parameterEdits;+
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};+
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+
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class ItemDialog : public QDialog+
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{+
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    Q_OBJECT+
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public:+
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    enum ItemType {+
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        QtBoxItem,+
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        CircleItem,+
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        SquareItem,+
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    };+
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+
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    ItemDialog();+
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public slots:+
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    void triggerNewQtBox();+
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    void triggerNewCircleItem();+
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    void triggerNewSquareItem();+
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signals:+
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    void doubleClicked();+
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    void newItemTriggered(ItemDialog::ItemType type);+
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protected:+
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    virtual void mouseDoubleClickEvent(QMouseEvent *event);+
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};+
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+
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class Scene : public QGraphicsScene+
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{+
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    Q_OBJECT+
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public:+
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    Scene(int width, int height, int maxTextureSize);+
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    ~Scene();+
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    virtual void drawBackground(QPainter *painter, const QRectF &rect);+
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+
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public slots:+
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    void setShader(int index);+
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    void setTexture(int index);+
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    void toggleDynamicCubemap(int state);+
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    void setColorParameter(const QString &name, QRgb color);+
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    void setFloatParameter(const QString &name, float value);+
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    void newItem(ItemDialog::ItemType type);+
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protected:+
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    void renderBoxes(const QMatrix4x4 &view, int excludeBox = -2);+
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    void setStates();+
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    void setLights();+
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    void defaultStates();+
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    void renderCubemaps();+
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+
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    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);+
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    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);+
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    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);+
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    virtual void wheelEvent(QGraphicsSceneWheelEvent * event);+
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private:+
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    void initGL();+
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    QPointF pixelPosToViewPos(const QPointF& p);+
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+
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    QTime m_time;+
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    int m_lastTime;+
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    int m_mouseEventTime;+
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    int m_distExp;+
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    int m_frame;+
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    int m_maxTextureSize;+
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+
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    int m_currentShader;+
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    int m_currentTexture;+
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    bool m_dynamicCubemap;+
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    bool m_updateAllCubemaps;+
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+
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    RenderOptionsDialog *m_renderOptions;+
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    ItemDialog *m_itemDialog;+
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    QTimer *m_timer;+
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    GLRoundedBox *m_box;+
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    TrackBall m_trackBalls[3];+
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    QVector<GLTexture *> m_textures;+
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    GLTextureCube *m_environment;+
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    GLTexture3D *m_noise;+
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    GLRenderTargetCube *m_mainCubemap;+
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    QVector<GLRenderTargetCube *> m_cubemaps;+
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    QVector<QGLShaderProgram *> m_programs;+
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    QGLShader *m_vertexShader;+
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    QVector<QGLShader *> m_fragmentShaders;+
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    QGLShader *m_environmentShader;+
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    QGLShaderProgram *m_environmentProgram;+
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};+
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+
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#endif+
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