scene.h Example File | Qt Widgets 5.6

Qt 5.6 | Qt Widgets | Boxes | scene.h Example File

Qt 5.6.2 Reference Documentation

# scene.h Example File

graphicsview/boxes/scene.h

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
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      ** information use the contact form at http://www.qt.io/contact-us.
      **
      ** GNU Lesser General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU Lesser
      ** General Public License version 2.1 or version 3 as published by the Free
      ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
      ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
      ** following information to ensure the GNU Lesser General Public License
      ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
      **
      ** As a special exception, The Qt Company gives you certain additional
      ** rights. These rights are described in The Qt Company LGPL Exception
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      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #ifndef SCENE_H
      #define SCENE_H

      //#include <GL/glew.h>
      #include "glextensions.h"

      #include <QtWidgets>
      #include <QtOpenGL>

      #include "roundedbox.h"
      #include "gltrianglemesh.h"
      #include "trackball.h"
      #include "glbuffers.h"
      #include "qtbox.h"

      #define PI 3.14159265358979

      class QMatrix4x4;

      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() Q_DECL_OVERRIDE {emit colorChanged(m_color, m_id);}
      public slots:
          void editDone();
      signals:
          void colorChanged(QRgb color, int id);
      protected:
          virtual void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
          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() Q_DECL_OVERRIDE {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) Q_DECL_OVERRIDE;
          virtual void resizeEvent(QGraphicsSceneResizeEvent *event) Q_DECL_OVERRIDE;
          virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
      };

      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) Q_DECL_OVERRIDE;

          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) Q_DECL_OVERRIDE;
      };

      class Scene : public QGraphicsScene
      {
          Q_OBJECT
      public:
          Scene(int width, int height, int maxTextureSize);
          ~Scene();
          virtual void drawBackground(QPainter *painter, const QRectF &rect) Q_DECL_OVERRIDE;

      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) Q_DECL_OVERRIDE;
          virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
          virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
          virtual void wheelEvent(QGraphicsSceneWheelEvent * event) Q_DECL_OVERRIDE;
      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