QmitkSliceNavigationListener.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 QmitkSliceNavigationListener_h
#define QmitkSliceNavigationListener_h
 
#include <mitkTimeGeometry.h>
#include <mitkPoint.h>
 
#include <itkEventObject.h>
 
#include <QObject>
 
#include <org_mitk_gui_qt_common_Export.h>
 
namespace itk
{
  class Object;
}
 
namespace mitk
{
  class SliceNavigationController;
  struct IRenderWindowPart;
}
 
 
class MITK_QT_COMMON QmitkSliceNavigationListener : public QObject
  {
    Q_OBJECT
 
  public:
    QmitkSliceNavigationListener();
    ~QmitkSliceNavigationListener() override;
 
    mitk::TimePointType GetCurrentSelectedTimePoint() const;
    mitk::Point3D GetCurrentSelectedPosition() const;
 
  signals:
    void SliceChanged();
    void SelectedTimePointChanged(const mitk::TimePointType& newTimePoint);
    void SelectedPositionChanged(const mitk::Point3D& newPoint);
 
  public slots:
    void RenderWindowPartActivated(mitk::IRenderWindowPart* renderWindowPart);
    void RenderWindowPartDeactivated(mitk::IRenderWindowPart* renderWindowPart);
    void RenderWindowPartInputChanged(mitk::IRenderWindowPart* renderWindowPart);
 
  protected slots:
      void OnSliceChangedDelayed();
 
  protected:
 
    void OnSliceChangedInternal(const itk::EventObject& e);
    void OnTimeChangedInternal(itk::Object* sender, const itk::EventObject& e);
 
    void OnSliceNavigationControllerDeleted(const itk::Object* sender, const itk::EventObject& /*e*/);
 
    bool InitObservers();
    void RemoveObservers(const mitk::SliceNavigationController* deletedSlicer);
    void RemoveAllObservers(mitk::IRenderWindowPart* deletedPart = nullptr);
 
    bool ObserversInitialized(mitk::SliceNavigationController* controller);
 
    mitk::IRenderWindowPart* m_renderWindowPart;
 
    // Needed for observing the events for when a slice or time step is changed.
    bool m_PendingSliceChangedEvent;
 
    struct ObserverInfo
    {
      mitk::SliceNavigationController* controller;
      int observerTag;
      std::string renderWindowName;
      mitk::IRenderWindowPart* renderWindowPart;
 
      ObserverInfo(mitk::SliceNavigationController* controller, int observerTag,
        const std::string& renderWindowName, mitk::IRenderWindowPart* part);
    };
 
    typedef std::multimap<const mitk::SliceNavigationController*, ObserverInfo> ObserverMapType;
    ObserverMapType m_ObserverMap;
    unsigned int m_ControllerToTimeObserverTag;
 
    mitk::Point3D m_CurrentSelectedPosition;
    mitk::TimePointType m_CurrentSelectedTimePoint;
  };
 
#endif