--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qmlfrontend/game_view.h	Wed Jul 31 23:14:27 2019 +0200
@@ -0,0 +1,64 @@
+#ifndef GAMEVIEW_H
+#define GAMEVIEW_H
+
+#include <QQuickItem>
+
+#include <QPointer>
+#include <QScopedPointer>
+#include <QtGui/QOpenGLFunctions>
+#include <QtGui/QOpenGLShaderProgram>
+
+#include "engine_instance.h"
+
+class GameViewRenderer : public QObject, protected QOpenGLFunctions {
+  Q_OBJECT
+ public:
+  explicit GameViewRenderer();
+  ~GameViewRenderer() override;
+
+  void tick(quint32 delta);
+  void setEngineInstance(EngineInstance* engineInstance);
+
+ public slots:
+  void paint();
+  void onViewportSizeChanged(QQuickWindow* window);
+
+ private:
+  quint32 m_delta;
+  QPointer<EngineInstance> m_engineInstance;
+};
+
+class GameView : public QQuickItem {
+  Q_OBJECT
+
+  Q_PROPERTY(EngineInstance* engineInstance READ engineInstance WRITE
+                 setEngineInstance NOTIFY engineInstanceChanged)
+
+ public:
+  explicit GameView(QQuickItem* parent = nullptr);
+
+  Q_INVOKABLE void tick(quint32 delta);
+
+  EngineInstance* engineInstance() const;
+
+ signals:
+  void engineInstanceChanged(EngineInstance* engineInstance);
+
+ public slots:
+  void sync();
+  void cleanup();
+  void setEngineInstance(EngineInstance* engineInstance);
+
+ private slots:
+  void handleWindowChanged(QQuickWindow* win);
+
+ private:
+  quint32 m_delta;
+  QScopedPointer<GameViewRenderer> m_renderer;
+  bool m_windowChanged;
+  QPointer<EngineInstance> m_engineInstance;
+  QSize m_viewportSize;
+  QPoint m_centerPoint;
+};
+
+#endif  // GAMEVIEW_H