QQuickVTKRenderItem.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    QQuickVTKRenderItem.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 QQuickVTKRenderItem_h
#define QQuickVTKRenderItem_h
 
// Qt includes
#include <QOpenGLFunctions> // For QOpenGLFunctions
#include <QQuickItem>
 
// vtk includes
#include "QQuickVTKRenderWindow.h" // For QQuickVTKRenderWindow
#include "vtkNew.h"                // For vtkNew
#include "vtkRenderer.h"           // For vtkRenderer
 
#include "vtkGUISupportQtQuickModule.h" // for export macro
 
// Forward declarations
class QHoverEvent;
class QKeyEvent;
class QMouseEvent;
class QQuickVTKInteractiveWidget;
class vtkImageData;
 
class VTKGUISUPPORTQTQUICK_EXPORT QQuickVTKRenderItem
  : public QQuickItem
  , protected QOpenGLFunctions
{
  Q_OBJECT
  typedef QQuickItem Superclass;
 
  Q_PROPERTY(QQuickVTKRenderWindow* renderWindow READ renderWindow WRITE setRenderWindow)
 
public:
  QQuickVTKRenderItem(QQuickItem* parent = nullptr);
  ~QQuickVTKRenderItem() = default;
 
 
  QQuickVTKRenderWindow* renderWindow() const;
  virtual void setRenderWindow(QQuickVTKRenderWindow* w);
 
  vtkRenderer* renderer() const;
 
  virtual vtkSmartPointer<vtkImageData> captureScreenshot();
 
 
  virtual void addWidget(QQuickVTKInteractiveWidget* w);
  virtual void removeWidget(QQuickVTKInteractiveWidget* w);
 
 
  virtual QQuickVTKInteractiveWidget* widgetByName(QString name) const;
  virtual void removeWidgetByName(QString name);
 
public Q_SLOTS:
  virtual void sync();
 
  virtual void init();
 
  virtual void paint();
 
  virtual void cleanup();
 
protected Q_SLOTS:
  virtual void handleWindowChanged(QQuickWindow* w);
 
protected:
  // Helper members
  QQuickVTKRenderWindow* m_renderWindow = nullptr;
  vtkNew<vtkRenderer> m_renderer;
 
  QVector<QQuickVTKInteractiveWidget*> m_widgets;
 
  virtual void setViewport(const QRectF& rect);
 
  // 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 event(QEvent* ev) override;
 
private:
  QQuickVTKRenderItem(const QQuickVTKRenderItem&) = delete;
  void operator=(const QQuickVTKRenderItem) = delete;
};
 
#endif // QQuickVTKRenderItem_h