Qt 5.6 | Qt OpenGL | Hello GL2 Example | glwidget.h Example File

Qt 5.6.2 Reference Documentation

# glwidget.h Example File

hellogl2/glwidget.h

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      #ifndef GLWIDGET_H
      #define GLWIDGET_H

      #include <QOpenGLWidget>
      #include <QOpenGLFunctions>
      #include <QOpenGLVertexArrayObject>
      #include <QOpenGLBuffer>
      #include <QMatrix4x4>
      #include "logo.h"

      QT_FORWARD_DECLARE_CLASS(QOpenGLShaderProgram)

      class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
      {
          Q_OBJECT

      public:
          GLWidget(QWidget *parent = 0);
          ~GLWidget();

          QSize minimumSizeHint() const Q_DECL_OVERRIDE;
          QSize sizeHint() const Q_DECL_OVERRIDE;

      public slots:
          void setXRotation(int angle);
          void setYRotation(int angle);
          void setZRotation(int angle);
          void cleanup();

      signals:
          void xRotationChanged(int angle);
          void yRotationChanged(int angle);
          void zRotationChanged(int angle);

      protected:
          void initializeGL() Q_DECL_OVERRIDE;
          void paintGL() Q_DECL_OVERRIDE;
          void resizeGL(int width, int height) Q_DECL_OVERRIDE;
          void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
          void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;

      private:
          void setupVertexAttribs();

          bool m_core;
          int m_xRot;
          int m_yRot;
          int m_zRot;
          QPoint m_lastPos;
          Logo m_logo;
          QOpenGLVertexArrayObject m_vao;
          QOpenGLBuffer m_logoVbo;
          QOpenGLShaderProgram *m_program;
          int m_projMatrixLoc;
          int m_mvMatrixLoc;
          int m_normalMatrixLoc;
          int m_lightPosLoc;
          QMatrix4x4 m_proj;
          QMatrix4x4 m_camera;
          QMatrix4x4 m_world;
          bool m_transparent;
      };

      #endif