fltk/test/adjuster.cxx

//
// Adjuster test program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2026 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
//

#include <stdlib.h>
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Adjuster.H>
#include <FL/Fl_Box.H>

void adjcb(Fl_Widget *o, void *v) {
  Fl_Adjuster *a = (Fl_Adjuster*)o;
  Fl_Box *b = (Fl_Box *)v;
  std::string new_label = a->format_str();
  b->copy_label(new_label.c_str());
  b->redraw();
}

int main(int argc, char ** argv) {
  Fl_Double_Window window(320, 100, argv[0]);

  Fl_Box b1(20, 30, 80, 25);
  b1.box(FL_DOWN_BOX);
  b1.color(FL_WHITE);
  Fl_Adjuster a1(20+80, 30, 3*25, 25);
  a1.callback(adjcb, &b1);
  adjcb(&a1, &b1);

  Fl_Box b2(20+80+4*25, 30, 80, 25);
  b2.box(FL_DOWN_BOX);
  b2.color(FL_WHITE);
  Fl_Adjuster a2(b2.x()+b2.w(), 10, 25, 3*25);
  a2.callback(adjcb, &b2);
  adjcb(&a2, &b2);

  window.resizable(window);
  window.end();
  window.show(argc, argv);
  return Fl::run();
}