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ColorPalette.h

#ifndef COLORPALETTE_H
#define COLORPALETTE_H

#pragma warning(disable : 4786)
#include <map>


class VColorPalette
{
protected:
        // maps a COLORREF to the number of times it has been used
        map<unsigned long, int> m_mColors;

public:

        void AddColorReference(COLORREF color)
        {
                // (will add to the map if color doesn't exist)
                m_mColors[color]++;
        }

        void DeleteColorReference(COLORREF color)
        {
                m_mColors[color] = m_mColors[color] - 1;
                if (m_mColors[color] <= 0)
                {
                        m_mColors.erase( m_mColors.find(color) );
                }
        }

        COLORREF GetColor(int pos)
        {
                map<COLORREF, int>::iterator it;
                for (it=m_mColors.begin(); it != m_mColors.end() && pos > 0; pos--)
                {
                        it++;
                }

                if ( it != m_mColors.end() )
                        return it->first;
                else
                        return RGB(0, 0, 0);
        }

        int ColorCount()
        {
                return (int) m_mColors.size();
        }

};

#endif

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