#include <cpExtensions/Interaction/ImageInteractorStyle.h>

#include <vtkImageActor.h>
#include <vtkRenderWindowInteractor.h>

// -------------------------------------------------------------------------
cpExtensions::Interaction::ImageInteractorStyle::
Self* cpExtensions::Interaction::ImageInteractorStyle::
New( )
{
  return( new Self );
}

// -------------------------------------------------------------------------
void cpExtensions::Interaction::ImageInteractorStyle::
AssociateImageActor( vtkImageActor* actor )
{
  if( actor != NULL )
  {
    this->m_PropPicker->AddPickList( actor );
    this->Modified( );

  } // fi
}

// -------------------------------------------------------------------------
cpExtensions::Interaction::ImageInteractorStyle::
ImageInteractorStyle( )
  : Superclass( )
{
  this->m_PropPicker = vtkSmartPointer< vtkPropPicker >::New( );
  this->m_PropPicker->PickFromListOn( );
}

// -------------------------------------------------------------------------
cpExtensions::Interaction::ImageInteractorStyle::
~ImageInteractorStyle( )
{
}

// -------------------------------------------------------------------------
bool cpExtensions::Interaction::ImageInteractorStyle::
_PickPosition( int idx[ 2 ], double pos[ 3 ] )
{
  vtkRenderWindowInteractor* rwi = this->GetInteractor( );
  if( rwi == NULL )
    return( false );

  // Find the renderer where the event has been raised
  idx[ 0 ] = rwi->GetEventPosition( )[ 0 ];
  idx[ 1 ] = rwi->GetEventPosition( )[ 1 ];
  this->FindPokedRenderer( double( idx[ 0 ] ), double( idx[ 1 ] ) );

  // Pick a 3D position
  int r = this->m_PropPicker->Pick(
    double( idx[ 0 ] ), double( idx[ 1 ] ), double( 0 ),
    this->CurrentRenderer
    );
  if( r == 0 )
    return( false );
  this->m_PropPicker->GetPickPosition( pos );
  return( true );
}

// eof - $RCSfile$