otbMouseClickActionHandler.h

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/*=========================================================================

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt 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 notices for more information.

=========================================================================*/
#ifndef __otbMouseClickActionHandler_h
#define __otbMouseClickActionHandler_h

#include "otbImageWidgetActionHandler.h"

namespace otb
{
template <class TModel, class TView>
class MouseClickActionHandler
  : public ImageWidgetActionHandler
{
public:
  typedef MouseClickActionHandler       Self;
  typedef ImageWidgetActionHandler      Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(MouseClickActionHandler, ImageWidgetActionHandler);

  typedef TModel                      ModelType;
  typedef typename ModelType::Pointer ModelPointerType;

  typedef TView                      ViewType;
  typedef typename ViewType::Pointer ViewPointerType;

  virtual bool HandleWidgetEvent(const std::string& widgetId, int event)
  {
    if (m_View.IsNotNull() && m_Model.IsNotNull() && this->GetIsActive())
      {
      typename ViewType::ImageWidgetType::Pointer source;

      if (m_ActiveOnScrollWidget && widgetId == m_View->GetScrollWidget()->GetIdentifier())
        {
        source = m_View->GetScrollWidget();
        }
      else if (m_ActiveOnFullWidget && widgetId == m_View->GetFullWidget()->GetIdentifier())
        {
        source = m_View->GetFullWidget();
        }
      else if (m_ActiveOnZoomWidget && widgetId == m_View->GetZoomWidget()->GetIdentifier())
        {
        source = m_View->GetZoomWidget();
        }

      if (source.IsNotNull() && event == FL_PUSH && Fl::event_button() == m_MouseButton)
        {
        // Get the clicked index
        typename ViewType::ImageWidgetType::PointType screenPoint, imagePoint;
        screenPoint = source->GetMousePosition();

        // Transform to image point
        imagePoint = source->GetScreenToImageTransform()->TransformPoint(screenPoint);

        // Transform to index
        typename ViewType::IndexType index;
        index[0] = static_cast<int>(imagePoint[0]);
        index[1] = static_cast<int>(imagePoint[1]);

        // Change scaled extract region center
        m_Model->IndexClicked(index);
        return true;
        }
      }
    return false;
  }

  itkSetObjectMacro(Model, ModelType);
  itkGetObjectMacro(Model, ModelType);

  itkSetObjectMacro(View, ViewType);
  itkGetObjectMacro(View, ViewType);

  itkSetClampMacro(MouseButton, int, 1, 3);
  itkGetMacro(MouseButton, int);

  itkSetMacro(ActiveOnScrollWidget, bool);
  itkGetMacro(ActiveOnScrollWidget, bool);
  itkBooleanMacro(ActiveOnScrollWidget);

  itkSetMacro(ActiveOnFullWidget, bool);
  itkGetMacro(ActiveOnFullWidget, bool);
  itkBooleanMacro(ActiveOnFullWidget);

  itkSetMacro(ActiveOnZoomWidget, bool);
  itkGetMacro(ActiveOnZoomWidget, bool);
  itkBooleanMacro(ActiveOnZoomWidget);

protected:
  MouseClickActionHandler() : m_View(), m_Model(), m_ActiveOnScrollWidget(true), m_ActiveOnFullWidget(true),
    m_ActiveOnZoomWidget(true), m_MouseButton(1)
  {
  }

  virtual ~MouseClickActionHandler(){}
  void PrintSelf(std::ostream& os, itk::Indent indent) const
  {
    Superclass::PrintSelf(os, indent);
  }

private:
  MouseClickActionHandler(const Self&);    // purposely not implemented
  void operator =(const Self&); // purposely not implemented

  // Pointer to the view
  ViewPointerType m_View;

  // Pointer to the model
  ModelPointerType m_Model;

  // ClickOnScroll
  bool m_ActiveOnScrollWidget;
  bool m_ActiveOnFullWidget;
  bool m_ActiveOnZoomWidget;

  int m_MouseButton;

}; // end class
} // end namespace otb
#endif