dox/GUISupport/Qt/Chart/vtkQtChartColors.h

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

  Program:   Visualization Toolkit
  Module:    vtkQtChartColors.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/


#ifndef _vtkQtChartColors_h
#define _vtkQtChartColors_h

#include "vtkQtChartExport.h"
#include <QColor> // Needed for return type.

class vtkQtChartColorsInternal;


class VTKQTCHART_EXPORT vtkQtChartColors
{
public:
  enum ColorScheme
    {
    Spectrum = 0, 
    Warm,         
    Cool,         
    Blues,        
    WildFlower,   
    Citrus,       
    Custom        
    };
  
public:
  vtkQtChartColors(ColorScheme scheme=Spectrum);

  vtkQtChartColors(const vtkQtChartColors &other);
  ~vtkQtChartColors();

  vtkQtChartColors &operator=(const vtkQtChartColors &other);

  ColorScheme getColorScheme() const {return this->Scheme;}

  void setColorScheme(ColorScheme scheme);

  int getNumberOfColors() const;

  QColor getColor(int index) const;

  void setColor(int index, const QColor &color);

  void clearColors();

  void addColor(const QColor &color);

  void insertColor(int index, const QColor &color);

  void removeColor(int index);

public:
  static QColor lighter(const QColor &color, float factor=0.7);

  static QColor interpolateHsv(const QColor &color1, const QColor &color2,
      float fraction);

  static QColor interpolateRgb(const QColor &color1, const QColor &color2,
      float fraction);

private:
  static float getDistance(float x1, float y1, float z1, float x2, float y2,
      float z2);

  static float getComponent(float x1, float x2, float f, float s);

private:
  vtkQtChartColorsInternal *Internal; 
  ColorScheme Scheme;                 
};

#endif