ref: ef4a4ef43b986cb5e4dd60ef753c79d7f79acb22
dir: /external/fltk/examples/tree-custom-sort.cxx/
// // "$Id$" // // Simple Fl_Tree custom (numeric) sort example. - erco 12/16/2013 // Demonstrates custom sorting of Fl_Tree items. // // Copyright 2013 Greg Ercolano. // Copyright 1998-2010 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: // // http://www.fltk.org/COPYING.php // // Please report all bugs and problems on the following page: // // http://www.fltk.org/str.php // #include <stdio.h> #include <stdlib.h> /* qsort(3), srand(3).. */ #include <time.h> /* time(2) */ #include <FL/Fl.H> #include <FL/Fl_Double_Window.H> #include <FL/Fl_Tree.H> #include <FL/Fl_Button.H> Fl_Tree *G_tree = 0; // Resort the tree void MySortCallback(Fl_Widget*, void *data) { int dir = int(fl_intptr_t(data)); // forward or reverse Fl_Tree_Item *i = G_tree->root(); // Bubble sort for ( int ax=0; ax<i->children(); ax++ ) { for ( int bx=ax+1; bx<i->children(); bx++ ) { long a; sscanf(i->child(ax)->label(), "%ld", &a); long b; sscanf(i->child(bx)->label(), "%ld", &b); switch ( dir ) { case 1: if ( a > b ) { i->swap_children(ax, bx); } break; // fwd case -1: if ( a < b ) { i->swap_children(ax, bx); } break; // rev } } } G_tree->redraw(); } int main(int argc, char *argv[]) { // Randomize the random number generator time_t tval; time(&tval); srand((unsigned)tval); // Create window with tree Fl::scheme("gtk+"); Fl_Double_Window *win = new Fl_Double_Window(250, 600, "Numeric Sort Tree"); win->begin(); { G_tree = new Fl_Tree(10, 10, win->w()-20, win->h()-60); G_tree->showroot(0); // Add 200 random numbers to the tree char word[50]; for ( int t=0; t<200; t++ ) { sprintf(word, "%ld", long((float(rand()) / RAND_MAX) * 1000000)); G_tree->add(word); } // Add some sort buttons Fl_Button *but; but = new Fl_Button(10, win->h()-40,80,20,"Fwd"); but->callback(MySortCallback, (void*) 1); but = new Fl_Button(20+80,win->h()-40,80,20,"Rev"); but->callback(MySortCallback, (void*)-1); } win->end(); win->resizable(win); win->show(argc, argv); return(Fl::run()); } // // End of "$Id$". //