qt5base-lts/examples/opengl/legacy/overpainting/glwidget.h

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#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QGLWidget>
#include <QOpenGLFunctions_1_1>
#include <QTimer>

class Bubble;
class QtLogo;

//! [0]
class GLWidget : public QGLWidget, public QOpenGLFunctions_1_1
{
    Q_OBJECT

public:
    GLWidget(QWidget *parent = 0);
    ~GLWidget();
//! [0]

    QSize sizeHint() const override;
    int xRotation() const { return xRot; }
    int yRotation() const { return yRot; }
    int zRotation() const { return zRot; }

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

//! [1]
protected:
    void initializeGL() override;
    void paintEvent(QPaintEvent *event) override;
    void resizeGL(int width, int height) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void showEvent(QShowEvent *event) override;

private slots:
    void animate();

private:
    void createBubbles(int number);
    void drawInstructions(QPainter *painter);
//! [1]
    void setupViewport(int width, int height);

    QColor qtGreen;
    QColor qtPurple;

    GLuint object;
    int xRot;
    int yRot;
    int zRot;
    QPoint lastPos;
//! [4]
    QtLogo *logo;
    QList<Bubble*> bubbles;
    QTimer animationTimer;
//! [4]
};

#endif // GLWIDGET_H