compositor.h Example File

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  #ifndef WINDOWCOMPOSITOR_H
  #define WINDOWCOMPOSITOR_H

  #include <QtWaylandCompositor/QWaylandCompositor>
  #include <QtWaylandCompositor/QWaylandSurface>
  #include <QtWaylandCompositor/QWaylandView>
  #include <QtWaylandCompositor/QWaylandWlShellSurface>
  #include <QtWaylandCompositor/QWaylandXdgSurfaceV5>
  #include <QTimer>
  #include <QOpenGLTextureBlitter>

  class QWaylandWlShell;
  class QWaylandWlShellSurface;
  class QWaylandXdgShellV5;
  class QOpenGLTexture;
  class Compositor;

  class View : public QWaylandView
  {
      Q_OBJECT
  public:
      View(Compositor *compositor);
      QOpenGLTexture *getTexture();
      QOpenGLTextureBlitter::Origin textureOrigin() const;
      QPointF position() const { return m_position; }
      void setPosition(const QPointF &pos) { m_position = pos; }
      QSize size() const;
      bool isCursor() const;
      bool hasShell() const { return m_wlShellSurface; }
      void setParentView(View *parent) { m_parentView = parent; }
      View *parentView() const { return m_parentView; }
      QPointF parentPosition() const { return m_parentView ? (m_parentView->position() + m_parentView->parentPosition()) : QPointF(); }
      QSize windowSize() { return m_xdgSurface ? m_xdgSurface->windowGeometry().size() :  surface() ? surface()->size() : m_size; }
      QPoint offset() const { return m_offset; }

      qreal animationFactor() const {return m_animationFactor; }
      void setAnimationFactor(qreal f) {m_animationFactor = f; }

  signals:
      void animationDone();

  protected:
      void timerEvent(QTimerEvent *event) override;

  private:
      friend class Compositor;
      Compositor *m_compositor = nullptr;
      GLenum m_textureTarget = GL_TEXTURE_2D;
      QOpenGLTexture *m_texture = nullptr;
      QOpenGLTextureBlitter::Origin m_origin;
      QPointF m_position;
      QSize m_size;
      QWaylandWlShellSurface *m_wlShellSurface = nullptr;
      QWaylandXdgSurfaceV5 *m_xdgSurface = nullptr;
      QWaylandXdgPopupV5 *m_xdgPopup = nullptr;
      View *m_parentView = nullptr;
      QPoint m_offset;
      qreal m_animationFactor = 1.0;
      QBasicTimer m_animationTimer;
      bool m_animationCountUp;

  public slots:
      void onXdgSetMaximized();
      void onXdgUnsetMaximized();
      void onXdgSetFullscreen(QWaylandOutput *output);
      void onXdgUnsetFullscreen();
      void onOffsetForNextFrame(const QPoint &offset);

      void startAnimation(bool countUp);
      void cancelAnimation();
  };

  class Compositor : public QWaylandCompositor
  {
      Q_OBJECT
  public:
      Compositor(QWindow *window);
      ~Compositor() override;
      void create() override;

      void startRender();
      void endRender();

      QList<View*> views() const { return m_views; }
      void raise(View *view);

      void handleMouseEvent(QWaylandView *target, QMouseEvent *me);
      void handleResize(View *target, const QSize &initialSize, const QPoint &delta, int edge);
      void handleDrag(View *target, QMouseEvent *me);

      QWaylandClient *popupClient() const;
      void closePopups();
  protected:
      void adjustCursorSurface(QWaylandSurface *surface, int hotspotX, int hotspotY);

  signals:
      void startMove();
      void startResize(int edge, bool anchored);
      void dragStarted(View *dragIcon);
      void frameOffset(const QPoint &offset);

  public slots:
      void triggerRender();

  private slots:
      void surfaceHasContentChanged();
      void surfaceDestroyed();
      void viewSurfaceDestroyed();
      void onStartMove();
      void onWlStartResize(QWaylandSeat *seat, QWaylandWlShellSurface::ResizeEdge edges);
      void onXdgStartResize(QWaylandSeat *seat, QWaylandXdgSurfaceV5::ResizeEdge edges);

      void startDrag();

      void onSurfaceCreated(QWaylandSurface *surface);
      void onWlShellSurfaceCreated(QWaylandWlShellSurface *wlShellSurface);
      void onXdgSurfaceCreated(QWaylandXdgSurfaceV5 *xdgSurface);
      void onXdgPopupRequested(QWaylandSurface *surface, QWaylandSurface *parent, QWaylandSeat *seat,
                               const QPoint &position, const QWaylandResource &resource);
      void onSetTransient(QWaylandSurface *parentSurface, const QPoint &relativeToParent, bool inactive);
      void onSetPopup(QWaylandSeat *seat, QWaylandSurface *parent, const QPoint &relativeToParent);

      void onSubsurfaceChanged(QWaylandSurface *child, QWaylandSurface *parent);
      void onSubsurfacePositionChanged(const QPoint &position);

      void updateCursor();
      void viewAnimationDone();
  private:
      View *findView(const QWaylandSurface *s) const;
      QWindow *m_window = nullptr;
      QList<View*> m_views;
      QWaylandWlShell *m_wlShell = nullptr;
      QWaylandXdgShellV5 *m_xdgShell = nullptr;
      QWaylandView m_cursorView;
      int m_cursorHotspotX;
      int m_cursorHotspotY;
  };


  #endif // WINDOWCOMPOSITOR_H