QQuickVTKRenderWindow.h

Go to the documentation of this file.

/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    QQuickVTKRenderWindow.h
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef QQuickVTKRenderWindow_h
#define QQuickVTKRenderWindow_h
 
// vtk includes
#include "vtkSmartPointer.h" // For vtkSmartPointer
 
// Qt includes
#include <QOpenGLFunctions> // For QOpenGLFunctions
#include <QPointer>         // For QPointer
#include <QQuickItem>
 
#include "vtkGUISupportQtQuickModule.h" // for export macro
 
// Forward declarations
class QEvent;
class QQuickVTKInteractorAdapter;
class QQuickWindow;
class QWheelEvent;
class vtkGenericOpenGLRenderWindow;
class vtkImageData;
class vtkRenderWindow;
class vtkRenderer;
class vtkWindowToImageFilter;
 
class VTKGUISUPPORTQTQUICK_EXPORT QQuickVTKRenderWindow
  : public QQuickItem
  , protected QOpenGLFunctions
{
  Q_OBJECT
  typedef QQuickItem Superclass;
 
public:
  QQuickVTKRenderWindow(QQuickItem* parent = nullptr);
 
  ~QQuickVTKRenderWindow();
 
  static void setupGraphicsBackend();
 
 
  void setRenderWindow(vtkRenderWindow* renWin);
  void setRenderWindow(vtkGenericOpenGLRenderWindow* renWin);
  vtkRenderWindow* renderWindow() const;
 
  virtual void mapToViewport(const QRectF& rect, double viewport[4]);
 
  QPointer<QQuickVTKInteractorAdapter> interactorAdapter() const;
 
 
  virtual vtkSmartPointer<vtkImageData> captureScreenshot();
  virtual vtkSmartPointer<vtkImageData> captureScreenshot(double* viewport);
 
  virtual bool isInitialized() const;
 
public Q_SLOTS:
  virtual void sync();
 
  virtual void init();
 
  virtual void paint();
 
  virtual void cleanup();
 
  virtual void renderNow();
 
  virtual void render();
 
protected Q_SLOTS:
  virtual void handleWindowChanged(QQuickWindow* w);
 
protected:
  QPointer<QQuickVTKInteractorAdapter> m_interactorAdapter;
  vtkSmartPointer<vtkGenericOpenGLRenderWindow> m_renderWindow;
  bool m_initialized = false;
 
  // Screenshot stuff
  bool m_screenshotScheduled = false;
  vtkNew<vtkWindowToImageFilter> m_screenshotFilter;
  vtkNew<vtkRenderer> m_dummyRenderer;
 
  // Event handlers
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
  void geometryChanged(const QRectF& newGeometry, const QRectF& oldGeometry) override;
#else
  void geometryChange(const QRectF& newGeometry, const QRectF& oldGeometry) override;
#endif
 
  bool checkGraphicsBackend();
 
private:
  QQuickVTKRenderWindow(const QQuickVTKRenderWindow&) = delete;
  void operator=(const QQuickVTKRenderWindow) = delete;
};
 
#endif // QQuickVTKRenderWindow_h