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

  Library:   CTK

  Copyright (c) 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 __ctkVTKThresholdWidget_h
#define __ctkVTKThresholdWidget_h

//Qt includes
#include <QWidget>

// CTK includes
#include <ctkVTKObject.h>
#include "ctkVisualizationVTKWidgetsExport.h"
class ctkVTKThresholdWidgetPrivate;

// VTK includes
class vtkPiecewiseFunction;

class CTK_VISUALIZATION_VTK_WIDGETS_EXPORT ctkVTKThresholdWidget
  : public QWidget
{
  Q_OBJECT
  QVTK_OBJECT

public:
  ctkVTKThresholdWidget(QWidget* parent = 0);
  virtual ~ctkVTKThresholdWidget();

  vtkPiecewiseFunction* piecewiseFunction()const;
  void range(double* range)const;

public slots:
  void setPiecewiseFunction(vtkPiecewiseFunction* function);
  void setRange(double min, double max);

protected slots:
  void updateFromPiecewiseFunction();
  void setThresholdValues(double min, double max);
  void setOpacity(double opacity);

protected:
  QScopedPointer<ctkVTKThresholdWidgetPrivate> d_ptr;

private:
  Q_DECLARE_PRIVATE(ctkVTKThresholdWidget);
  Q_DISABLE_COPY(ctkVTKThresholdWidget);
};

#endif