mirror of https://github.com/fltk/fltk
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
//
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// Simple Fl_Tree custom (numeric) sort example. - erco 12/16/2013
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// Demonstrates custom sorting of Fl_Tree items.
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//
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// Copyright 2013 Greg Ercolano.
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include <stdio.h>
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#include <stdlib.h> /* qsort(3), srand(3).. */
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#include <time.h> /* time(2) */
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#include <FL/Fl.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Tree.H>
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#include <FL/Fl_Button.H>
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Fl_Tree *G_tree = 0;
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// Resort the tree
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void MySortCallback(Fl_Widget*, void *data) {
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int dir = int(fl_intptr_t(data)); // forward or reverse
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Fl_Tree_Item *i = G_tree->root();
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// Bubble sort
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for ( int ax=0; ax<i->children(); ax++ ) {
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for ( int bx=ax+1; bx<i->children(); bx++ ) {
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long a; sscanf(i->child(ax)->label(), "%ld", &a);
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long b; sscanf(i->child(bx)->label(), "%ld", &b);
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switch ( dir ) {
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case 1: if ( a > b ) { i->swap_children(ax, bx); } break; // fwd
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case -1: if ( a < b ) { i->swap_children(ax, bx); } break; // rev
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}
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}
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}
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G_tree->redraw();
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}
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int main(int argc, char *argv[]) {
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// Randomize the random number generator
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time_t tval; time(&tval);
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srand((unsigned)tval);
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// Create window with tree
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Fl::scheme("gtk+");
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Fl_Double_Window *win = new Fl_Double_Window(250, 600, "Numeric Sort Tree");
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win->begin();
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{
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G_tree = new Fl_Tree(10, 10, win->w()-20, win->h()-60);
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G_tree->showroot(0);
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// Add 200 random numbers to the tree
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char word[50];
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for ( int t=0; t<200; t++ ) {
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sprintf(word, "%ld", long((double(rand()) / double(RAND_MAX)) * 1000000));
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G_tree->add(word);
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}
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// Add some sort buttons
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Fl_Button *but;
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but = new Fl_Button(10, win->h()-40,80,20,"Fwd"); but->callback(MySortCallback, (void*) 1);
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but = new Fl_Button(20+80,win->h()-40,80,20,"Rev"); but->callback(MySortCallback, (void*)-1);
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}
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win->end();
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win->resizable(win);
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win->show(argc, argv);
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return(Fl::run());
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}
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