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//
// Fl_Scheme header for the Fast Light Tool Kit (FLTK).
//
// Copyright 2022-2025 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#ifndef _FL_Fl_Scheme_H_
#define _FL_Fl_Scheme_H_
#include <FL/Fl.H>
/**
\brief Base class with static methods for future Fl_Scheme classes.
This class is intentionally not fully documented and is subject to change
in future FLTK versions.
\note Do not rely on details of this class.
\since 1.4.0
*/
class FL_EXPORT Fl_Scheme {
private:
static const char **names_; // registered scheme names
static int num_schemes_; // number of registered schemes
static int alloc_size_; // number of allocated scheme name entries
protected:
// const char *name_; // the scheme's name
// protected constructor - not yet implemented
// Fl_Scheme(const char *name);
public:
// Static methods.
// Some of these methods will replace the scheme related methods of class Fl,
// for instance Fl::scheme() and Fl::is_scheme().
// Backwards compatibility must be kept though.
static const char **names();
/**
Return the number of currently registered schemes.
\return Number of registered schemes.
*/
static int num_schemes() {
if (!names_) names(); // force initialization
return num_schemes_;
}
// Adding a scheme name must be a public static method in (since) FLTK 1.4.0.
// This will later be protected or replaced by another method name.
static int add_scheme_name(const char *name);
// Set color average parameter of the 'plastic' scheme.
// See GitHub Issue 464: "RFE: plastic scheme with faithful colors".
// See also documentation and implementation in src/fl_plastic.cxx.
static void plastic_color_average(int av);
}; // class Fl_Scheme
#endif // _FL_Fl_Scheme_H_
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