QmitkVideoBackground.h

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/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
#ifndef QmitkVideoBackground_h
#define QmitkVideoBackground_h
 
// MITK
#include "MitkQtWidgetsExtExports.h"
#include "mitkVideoSource.h"
 
// Qt
#include <QObject>
class QTimer;
 
// vtk
class vtkRenderer;
class vtkRenderWindow;
class vtkImageActor;
class vtkImageImport;
class vtkActor2D;
class vtkVideoSizeCallback;
class vtkObject;
 
class MITKQTWIDGETSEXT_EXPORT QmitkVideoBackground : public QObject
{
  Q_OBJECT
 
public:
  explicit QmitkVideoBackground(QObject *parent = nullptr);
  explicit QmitkVideoBackground(mitk::VideoSource *v, int TimerDelay = 25);
  ~QmitkVideoBackground() override;
 
  void AddRenderWindow(vtkRenderWindow *renderWindow);
  void RemoveRenderWindow(vtkRenderWindow *renderWindow);
  bool IsRenderWindowIncluded(vtkRenderWindow *renderWindow);
 
  void SetTimerDelay(int ms);
  void Enable();
  void Disable();
  bool IsEnabled();
 
  mitk::VideoSource *GetVideoSource();
  int GetTimerDelay();
  void Pause();
  void Resume();
 
  void SetVideoSource(mitk::VideoSource *videoSource);
 
  static void OnRenderWindowDelete(vtkObject *, unsigned long eid, void *clientdata, void * /*calldata*/);
 
  void OnVideoSourceDelete(const itk::Object *caller, const itk::EventObject &event);
public slots:
  void UpdateVideo();
signals:
  void NewFrameAvailable(mitk::VideoSource *);
 
  void EndOfVideoSourceReached(mitk::VideoSource *);
 
protected:
  struct VideoBackgroundVectorInfo
  {
    vtkRenderWindow *renWin;
    vtkRenderer *videoRenderer;
    vtkImageActor *videoActor;
    vtkImageImport *videoImport;
    unsigned long renderWindowObserverTag;
  };
 
  void RemoveRenderWindow(vtkRenderWindow *renderWindow, bool removeObserver);
  void ResetVideoBackground();
 
  void Modified();
  typedef std::vector<VideoBackgroundVectorInfo> RenderWindowVectorInfoType;
 
protected:
  RenderWindowVectorInfoType m_renderWindowVectorInfo;
 
  QTimer *m_QTimer;
 
  mitk::VideoSource *m_VideoSource;
 
  unsigned long m_VideoSourceObserverTag;
};
 
#endif