Qt 5.9 | Qt Quick | QQuickRenderControl Example | window_singlethreaded.h Example File

Qt 5.9.9 Reference Documentation

# window_singlethreaded.h Example File

rendercontrol/window_singlethreaded.h

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      #ifndef WINDOW_SINGLETHREADED_H
      #define WINDOW_SINGLETHREADED_H

      #include <QWindow>
      #include <QMatrix4x4>
      #include <QTimer>

      QT_FORWARD_DECLARE_CLASS(QOpenGLContext)
      QT_FORWARD_DECLARE_CLASS(QOpenGLFramebufferObject)
      QT_FORWARD_DECLARE_CLASS(QOffscreenSurface)
      QT_FORWARD_DECLARE_CLASS(QQuickRenderControl)
      QT_FORWARD_DECLARE_CLASS(QQuickWindow)
      QT_FORWARD_DECLARE_CLASS(QQmlEngine)
      QT_FORWARD_DECLARE_CLASS(QQmlComponent)
      QT_FORWARD_DECLARE_CLASS(QQuickItem)

      class CubeRenderer;

      class WindowSingleThreaded : public QWindow
      {
          Q_OBJECT

      public:
          WindowSingleThreaded();
          ~WindowSingleThreaded();

      protected:
          void exposeEvent(QExposeEvent *e) Q_DECL_OVERRIDE;
          void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE;
          void mousePressEvent(QMouseEvent *e) Q_DECL_OVERRIDE;
          void mouseReleaseEvent(QMouseEvent *e) Q_DECL_OVERRIDE;

      private slots:
          void run();

          void createFbo();
          void destroyFbo();
          void render();
          void requestUpdate();
          void handleScreenChange();

      private:
          void startQuick(const QString &filename);
          void updateSizes();
          void resizeFbo();

          QOpenGLContext *m_context;
          QOffscreenSurface *m_offscreenSurface;
          QQuickRenderControl *m_renderControl;
          QQuickWindow *m_quickWindow;
          QQmlEngine *m_qmlEngine;
          QQmlComponent *m_qmlComponent;
          QQuickItem *m_rootItem;
          QOpenGLFramebufferObject *m_fbo;
          bool m_quickInitialized;
          bool m_quickReady;
          QTimer m_updateTimer;
          CubeRenderer *m_cubeRenderer;
          qreal m_dpr;
      };

      #endif