#include <cpExtensions/Visualization/WindowLevelImageActor.h>
#include <cpExtensions/Visualization/ImageSliceMapper.h>

#include <vtkImageData.h>
#include <vtkImageProperty.h>

// -------------------------------------------------------------------------
cpExtensions::Visualization::WindowLevelImageActor::
Self* cpExtensions::Visualization::WindowLevelImageActor::
New( )
{
  return( new Self( ) );
}

// -------------------------------------------------------------------------
vtkImageData* cpExtensions::Visualization::WindowLevelImageActor::
GetImage( )
{
  return( this->m_Mapper->GetInput( ) );
}

// -------------------------------------------------------------------------
const vtkImageData* cpExtensions::Visualization::WindowLevelImageActor::
GetImage( ) const
{
  return( this->m_Mapper->GetInput( ) );
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
SetImage( vtkImageData* image )
{
  this->m_Mapper->SetInputData( image );
  image->GetScalarRange( this->m_Range );
  this->ResetWindowLevel( );
  this->Modified( );
}

// -------------------------------------------------------------------------
double cpExtensions::Visualization::WindowLevelImageActor::
GetLevel( )
{
  return( this->GetProperty( )->GetColorLevel( ) );
}

// -------------------------------------------------------------------------
double cpExtensions::Visualization::WindowLevelImageActor::
GetWindow( )
{
  return( this->GetProperty( )->GetColorWindow( ) );
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
SetLevel( double l )
{
  double old_l = this->GetProperty( )->GetColorLevel( );
  if( l != old_l && this->m_Range[ 0 ] <= l && l <= this->m_Range[ 1 ] )
  {
    this->GetProperty( )->SetColorLevel( l );
    this->Modified( );

  } // fi
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
SetWindow( double w )
{
  double max_w = this->m_Range[ 1 ] - this->m_Range[ 0 ];
  double old_w = this->GetProperty( )->GetColorWindow( );
  if( w != old_w && double( 0 ) <= w && w <= max_w )
  {
    this->GetProperty( )->SetColorWindow( w );
    this->Modified( );

  } // fi
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
SetWindowLevel( double w, double l )
{
  this->SetWindow( w );
  this->SetLevel( l );
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
ResetWindowLevel( )
{
  this->SetWindowLevel(
    this->m_Range[ 1 ] - this->m_Range[ 0 ],
    ( this->m_Range[ 1 ] + this->m_Range[ 0 ] ) / double( 2 )
    );
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
ConfigureWindowLevel( double min, double max )
{
  this->m_Range[ 0 ] = ( min < max )? min: max;
  this->m_Range[ 1 ] = ( min < max )? max: min;
  this->ResetWindowLevel( );
}

// -------------------------------------------------------------------------
void cpExtensions::Visualization::WindowLevelImageActor::
GetRange( double r[ 2 ] ) const
{
  r[ 0 ] = this->m_Range[ 0 ];
  r[ 1 ] = this->m_Range[ 1 ];
}

// -------------------------------------------------------------------------
cpExtensions::Visualization::WindowLevelImageActor::
WindowLevelImageActor( )
  : Superclass( )
{
  this->ConfigureWindowLevel( 0, 0 );
}

// -------------------------------------------------------------------------
cpExtensions::Visualization::WindowLevelImageActor::
~WindowLevelImageActor( )
{
}

// eof - $RCSfile$