mitkDisplayPositionEvent.cpp

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

Program:   Medical Imaging & Interaction Toolkit
Language:  C++
Date:      $Date$
Version:   $Revision$

Copyright (c) German Cancer Research Center, Division of Medical and
Biological Informatics. All rights reserved.
See MITKCopyright.txt or https://www.mitk.org/copyright.html 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.

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


#include "mitkDisplayPositionEvent.h"
#include "mitkBaseRenderer.h"

mitk::DisplayPositionEvent::DisplayPositionEvent(
  mitk::BaseRenderer *sender, int type, int button, int buttonState, int key, 
  const mitk::Point2D& displPosition )
: Event( sender, type, button, buttonState, key ),
  m_DisplayPosition( displPosition ),
  m_WorldPositionIsSet( false ),
  m_PickedObjectIsSet( false )
{
}

const mitk::Point3D& mitk::DisplayPositionEvent::GetWorldPosition() const
{
  // Method performs position picking and sets world position
  if ( m_WorldPositionIsSet )
    return m_WorldPosition;
 
  assert( m_Sender != NULL );
  
  m_Sender->PickWorldPoint( m_DisplayPosition, m_WorldPosition );

  m_WorldPositionIsSet = true;

  return m_WorldPosition;
}

mitk::DataNode *mitk::DisplayPositionEvent::GetPickedObjectNode() const
{
  // Method performs object picking and sets both object and world position
  if ( m_PickedObjectIsSet )
  {
    return m_PickedObjectNode;
  }
 
  assert( m_Sender != NULL );

  m_PickedObjectNode = m_Sender->PickObject( m_DisplayPosition, m_WorldPosition );

  m_PickedObjectIsSet = true;
  m_WorldPositionIsSet = true;

  return m_PickedObjectNode;
}

mitk::BaseData *mitk::DisplayPositionEvent::GetPickedObject() const
{
  mitk::DataNode *node = this->GetPickedObjectNode();

  if ( node != NULL )
  {
    return node->GetData();
  }
  else
  {
    return NULL;
  }
}