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

  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.apache.org/licenses/LICENSE-2.0.txt

  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 __ctkVTKScalarsToColorsView_h
#define __ctkVTKScalarsToColorsView_h

// CTK includes
#include "ctkVTKChartView.h"
#include "ctkVTKObject.h"
class ctkVTKScalarsToColorsViewPrivate;

// VTK includes
#include <QVTKWidget.h>
#include <vtkChartXY.h>

class vtkColorTransferFunction;
class vtkControlPointsItem;
class vtkLookupTable;
class vtkPiecewiseFunction;

/// \ingroup Visualization_VTK_Widgets
class CTK_VISUALIZATION_VTK_WIDGETS_EXPORT ctkVTKScalarsToColorsView
  : public ctkVTKChartView
{
  Q_OBJECT
  QVTK_OBJECT
  /// Add an empty space around the view to give space to the corner control
  /// points. False by default
  Q_PROPERTY(bool bordersVisible READ areBordersVisible WRITE setBordersVisible)

public:
  typedef ctkVTKChartView Superclass;
  ctkVTKScalarsToColorsView(QWidget* parent = 0);
  virtual ~ctkVTKScalarsToColorsView();

  virtual void addPlot(vtkPlot* plot);

  vtkPlot* addLookupTable(vtkLookupTable* lut);
  vtkPlot* addColorTransferFunction(vtkColorTransferFunction* colorTF, bool editable = true);
  vtkPlot* addOpacityFunction(vtkPiecewiseFunction* opacityTF, bool editable = true);
  vtkPlot* addCompositeFunction(vtkColorTransferFunction* colorTF,
                                vtkPiecewiseFunction* opacityTF,
                                bool colorTFEditable = true,
                                bool opacityTFEditable = true);
  vtkPlot* addPiecewiseFunction(vtkPiecewiseFunction* piecewiseTF, bool editable = true);

  vtkPlot* addColorTransferFunctionControlPoints(vtkColorTransferFunction* colorTF);
  vtkPlot* addOpacityFunctionControlPoints(vtkPiecewiseFunction* opacityTF);
  vtkPlot* addCompositeFunctionControlPoints(vtkColorTransferFunction* colorTF,
                                             vtkPiecewiseFunction* opacityTF);
  vtkPlot* addPiecewiseFunctionControlPoints(vtkPiecewiseFunction* piecewiseTF);

  QList<vtkPlot*> plots()const;
  template<class T>
  QList<T*> plots()const;
  QList<vtkControlPointsItem*> controlPointsItems()const;
  QList<vtkPlot*> lookupTablePlots()const;
  QList<vtkPlot*> lookupTablePlots(vtkLookupTable* lut)const;
  QList<vtkPlot*> colorTransferFunctionPlots()const;
  QList<vtkPlot*> colorTransferFunctionPlots(vtkColorTransferFunction* colorTF)const;
  QList<vtkPlot*> opacityFunctionPlots()const;
  QList<vtkPlot*> opacityFunctionPlots(vtkPiecewiseFunction* opacityTF)const;

  void setLookuptTableToPlots(vtkLookupTable* lut);
  void setColorTransferFunctionToPlots(vtkColorTransferFunction* colorTF);
  void setOpacityFunctionToPlots(vtkPiecewiseFunction* opacityTF);
  void setPiecewiseFunctionToPlots(vtkPiecewiseFunction* piecewiseTF);

  bool areBordersVisible()const;
  void setBordersVisible(bool show);

  void validBounds(double bounds[4])const;
  void setValidBounds(double bounds[4]);

  void setPlotsUserBounds(double* bounds);

  /// Reimplemented to set the bounds to the plots as well
  virtual void boundAxesToChartBounds();

public Q_SLOTS:
  void editPoint(vtkObject* plot, void * pointId);

  /// Move all the control points by a given offset.
  /// \sa vtkControlPoints::movePoints()
  void moveAllPoints(double xOffset, double yOffset = 0.,
                     bool dontMoveFirstAndLast = false);

  /// Spread all the control points by a given offset.
  /// A value >0 will space the control points, a value <0. will contract
  /// them.
  /// \sa vtkControlPoints::spreadPoints()
  void spreadAllPoints(double factor = 1.,
                       bool dontMoveFirstAndLast = false);

protected Q_SLOTS:
  void onBoundsChanged();

protected:
  QScopedPointer<ctkVTKScalarsToColorsViewPrivate> d_ptr;

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

// ----------------------------------------------------------------------------
template<class T>
QList<T*> ctkVTKScalarsToColorsView::plots()const
{
  QList<T*> res;
  const vtkIdType count = this->chart()->GetNumberOfPlots();
  for(vtkIdType i = 0; i < count; ++i)
    {
    vtkPlot* plot = this->chart()->GetPlot(i);
    if (T::SafeDownCast(plot) != 0)
      {
      res << T::SafeDownCast(plot);
      }
    }
  return res;
}


#endif