color.h

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#ifndef color_h
#define color_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        A.H. Bril
 Date:          22-3-2000
 RCS:           $Id$
________________________________________________________________________

-*/


#include "basicmod.h"
#include "gendefs.h"
class BufferStringSet;


mExpClass(Basic) Color
{
public:

                        Color( unsigned char r_=255, unsigned char g_=255,
                                unsigned char b_=255, unsigned char t_=0 );
                        Color( unsigned int rgbval );

    bool                operator ==( const Color& c ) const;
    bool                operator !=( const Color& c ) const;

    unsigned char       r() const;
    unsigned char       g() const;
    unsigned char       b() const;
    unsigned char       t() const;
    float               rF() const { return getFloat( r() ); }
    float               gF() const { return getFloat( g() ); }
    float               bF() const { return getFloat( b() ); }
    float               tF() const { return getFloat( t() ); }

    bool                isVisible() const;

    unsigned int        rgb() const;
    unsigned int&       rgb();

    void                set( unsigned char r_, unsigned char g_,
                             unsigned char b_, unsigned char t_=0 );

    float               average() const { return ((float) r()+g()+b())/3.0f; }
    Color               complementaryColor() const;
    Color               lighter(float fac) const;
    Color               darker( float fac ) const
                                        { return lighter( -fac ); }

    void                setRgb( unsigned int rgb_  );
    void                setTransparency( unsigned char t_ );
    void                setTransparencyF( float tf );
    void                setHSV(unsigned char h,unsigned char s,unsigned char v);
    void                getHSV(unsigned char&,unsigned char&,
                               unsigned char&) const;
    void                setStdStr(const char*); 
    const char*         getStdStr(bool withhash=true,
                                  int transpopt=0) const;

    void                fill(BufferString&) const;
    bool                use(const char*);

    static Color        NoColor()       { return Color(0,0,0,255); }

    static Color        Black()         { return Color(0,0,0,0); }
    static Color        Blue()          { return Color(0,0,255,0); }
    static Color        DgbColor()      { return Color(2,240,4,0); }
    static Color        Green()         { return Color(0,255,0,0); }
    static Color        LightGrey()     { return Color(211,211,211,0); }
    static Color        Orange()        { return Color(255,170,0); }
    static Color        Peach()         { return Color(255,218,185,0); }
    static Color        Red()           { return Color(255,0,0,0); }
    static Color        White()         { return Color(255,255,255,0); }
    static Color        Yellow()        { return Color(255,255,0,0); }

    static unsigned char getUChar( float v );
    static float         getFloat(unsigned char);

    static int          nrStdDrawColors();
    static Color        stdDrawColor(int);

    const char*         largeUserInfoString() const;
    const char*         getDescription() const;
    bool                fromDescription(const char*);
    static const BufferStringSet& descriptions();
    static const TypeSet<Color>& descriptionCenters();

protected:

    unsigned int        col_;
};


namespace Values {

template<>
mClass(Basic) Undef<Color>
{
public:
    static Color        val()                   { return Color::NoColor(); }
    static bool         hasUdf()                { return false; }
    static bool         isUfd(Color& col)       { return false; }
    static void         setUdf(Color& col)      {}
};

}


#endif