/**
 *  \file 
 *  \brief Class bbtk::ThresholdImageView . 
 */

#include "ThresholdImageView.h"
#include <vtkImageReslice.h>
#include <vtkLookupTable.h>
#include <vtkImageData.h>


  //=========================================================================
  //=========================================================================
  //=========================================================================
  //=========================================================================
	ThresholdImageView::ThresholdImageView( )
  {
	  _minValue					=	0;
	  _maxValue					=	1000;
	  _baseColorR				=	1;
	  _baseColorG				=	0;
	  _baseColorB				=	0;
  }

  //=========================================================================
  ThresholdImageView::~ThresholdImageView()
  {
  }
  //=========================================================================



//----------------------------------------------------------------------------
void ThresholdImageView::SetminMaxValue(int min, int max)
{
	_minValue = min;
	_maxValue = max;
}


//----------------------------------------------------------------------------
void ThresholdImageView::ConfigLookupTable()  // virtual
{
	double range[2];
	
	GetImage()->GetScalarRange(range);
	if (range[1]==0)
	{
		range[1]=255;
	}
	
	int minTot = floor (range[0]);
	int maxTot = ceil (range[1]);
	
	int minVal = floor (_minValue);
	int maxVal = floor (_maxValue);

	vtkLookupTable* thresholdTable = GetThresholdTable();
	thresholdTable->SetNumberOfTableValues(maxTot+1);
	thresholdTable->SetTableRange(range); 
	thresholdTable->SetAlphaRange(0, 1);
	thresholdTable->SetValueRange(0, 1);
	thresholdTable->SetSaturationRange(0, 0); 
	thresholdTable->SetRampToLinear( );

	//Assign a fake color for the upper image, and set the white as transparent
	int i;
	for(i = minTot; i <= maxTot; i++)
	{
		if( i >= minVal && i <= maxVal )
		{
			thresholdTable->SetTableValue(i,_baseColorR,_baseColorG,_baseColorB, 1);
		}
		else if( i >= minTot && i < minVal )
		{
			thresholdTable->SetTableValue(i, 1.0, 1.0, 1.0, 0); //transparent
		}
		else if( i > maxVal && i < maxTot )
		{
			thresholdTable->SetTableValue(i, 1.0, 1.0, 1.0, 0); //transparent
		}
		else
		{
			thresholdTable->SetTableValue(i, 1.0, 1.0, 1.0, 0); //transparent
		}
	} // for
	thresholdTable->Build( );

}


//----------------------------------------------------------------------------
void ThresholdImageView::SetBaseColor(double r, double g, double b)
{
	_baseColorR = r;
	_baseColorG = g;
	_baseColorB = b;
}


// EOF