gl_transition_widget.h

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#ifndef GL_TRANSITION_WIDGET_H
#define GL_TRANSITION_WIDGET_H
 
#include <QOpenGLWidget>
 
class QPropertyAnimation;

class GLTransitionWidget final : public QOpenGLWidget {
    Q_OBJECT
    Q_PROPERTY(float offset READ GetOffset WRITE SetOffset)
 
public:
    explicit GLTransitionWidget(QWidget *parent = nullptr);

    ~GLTransitionWidget() override;

    void SetWidgets(QWidget *current_widget, QWidget *next_widget);

    void StartTransition(int duration);

    float GetOffset() const { return offset_; }

    void SetOffset(float offset);
 
signals:
    void transitionFinished();
 
protected:
    void paintEvent(QPaintEvent *event) override;
 
private:
    QPixmap current_pixmap_;
    QPixmap next_pixmap_;
    float offset_ = 0.0f;
    QPropertyAnimation *animation_ = nullptr;
};
 
#endif // GL_TRANSITION_WIDGET_H