Fl_Scheme.H

//
// Scheme header for the Fast Light Tool Kit (FLTK).
//
// Copyright 2022-2023 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>
 
class 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();

  static int num_schemes() {
    if (!names_) names(); // force initialization
    return num_schemes_;
  }
 
  // Adding a scheme name must be a public static method in FLTK 1.4.0.
  // This will later be protected or replaced by another method name.
 
  static int add_scheme_name(const char *name);
 
}; // class Fl_Scheme
 
#endif // FL_Fl_Scheme_H_