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

  Library:   CTK

  Copyright (c) 2010  Kitware Inc.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.commontk.org/LICENSE

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

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

#ifndef __ctkVTKPiecewiseFunction_h
#define __ctkVTKPiecewiseFunction_h

// CTK includes
#include "ctkTransferFunction.h"
#include "ctkPimpl.h"
#include "CTKVisualizationVTKCoreExport.h"
#include "ctkVTKObject.h"

class vtkPiecewiseFunction;
class ctkVTKPiecewiseFunctionPrivate;

///
/// Transfer function for a vtkPiecewiseFunction

class CTK_VISUALIZATION_VTK_CORE_EXPORT ctkVTKPiecewiseFunction: public ctkTransferFunction
{
  Q_OBJECT;
  QVTK_OBJECT;
public:
  ctkVTKPiecewiseFunction(vtkPiecewiseFunction* piecewiserFunction,
                              QObject* parent = 0);
  virtual ~ctkVTKPiecewiseFunction();

  virtual ctkControlPoint* controlPoint(int index)const;
  virtual QVariant value(qreal pos)const;
  virtual int count()const;
  virtual bool isDiscrete()const;

  virtual void range(qreal& minRange, qreal& maxRange)const;
  virtual QVariant minValue()const;
  virtual QVariant maxValue()const;

  virtual int insertControlPoint(const ctkControlPoint& cp);
  virtual void setControlPointPos(int index, qreal pos);
  virtual void setControlPointValue(int index, const QVariant& value);

  void setPiecewiseFunction(vtkPiecewiseFunction* piecewiseFunction);
  vtkPiecewiseFunction* piecewiseFunction()const;
private:
  CTK_DECLARE_PRIVATE(ctkVTKPiecewiseFunction);
};

#endif