examples/tree-simple.cxx

   1 //
   2 // "$Id: tree-simple.cxx 8635 2011-05-06 04:27:49Z greg.ercolano $"
   3 //
   4 //      Simple Fl_Tree widget example. - erco 06/05/2010
   5 //
   6 // Copyright 2010 Greg Ercolano.
   7 // Copyright 1998-2010 by Bill Spitzak and others.
   8 //
   9 // This library is free software; you can redistribute it and/or
  10 // modify it under the terms of the GNU Library General Public
  11 // License as published by the Free Software Foundation; either
  12 // version 2 of the License, or (at your option) any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 // Library General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU Library General Public
  20 // License along with this library; if not, write to the Free Software
  21 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22 // USA.
  23 //
  24 // Please report all bugs and problems on the following page:
  25 //
  26 //     http://www.fltk.org/str.php
  27 //
  28 #include <stdio.h>
  29 #include <FL/Fl.H>
  30 #include <FL/Fl_Double_Window.H>
  31 #include <FL/Fl_Tree.H>
  32
  33 // Tree's callback
  34 //    Invoked whenever an item's state changes.
  35 //
  36 void TreeCallback(Fl_Widget *w, void *data) {
  37   Fl_Tree *tree = (Fl_Tree*)w;
  38   Fl_Tree_Item *item = (Fl_Tree_Item*)tree->callback_item();
  39   if ( ! item ) return;
  40   switch ( tree->callback_reason() ) {
  41     case FL_TREE_REASON_SELECTED: {
  42       char pathname[256];
  43       tree->item_pathname(pathname, sizeof(pathname), item);
  44       fprintf(stderr, "TreeCallback: Item selected='%s', Full pathname='%s'\n", item->label(), pathname);
  45       break;
  46     }
  47     case FL_TREE_REASON_DESELECTED:
  48       // fprintf(stderr, "TreeCallback: Item '%s' deselected\n", item->label());
  49       break;
  50     case FL_TREE_REASON_OPENED:
  51       // fprintf(stderr, "TreeCallback: Item '%s' opened\n", item->label());
  52       break;
  53     case FL_TREE_REASON_CLOSED:
  54       // fprintf(stderr, "TreeCallback: Item '%s' closed\n", item->label());
  55     default:
  56       break;
  57   }
  58 }
  59
  60 int main(int argc, char *argv[]) {
  61   Fl::scheme("gtk+");
  62   Fl_Double_Window *win = new Fl_Double_Window(250, 400, "Simple Tree");
  63   win->begin();
  64   {
  65     // Create the tree
  66     Fl_Tree *tree = new Fl_Tree(10, 10, win->w()-20, win->h()-20);
  67     tree->showroot(0);                          // don't show root of tree
  68     tree->callback(TreeCallback);               // setup a callback for the tree
  69
  70     // Add some items
  71     tree->add("Flintstones/Fred");
  72     tree->add("Flintstones/Wilma");
  73     tree->add("Flintstones/Pebbles");
  74     tree->add("Simpsons/Homer");
  75     tree->add("Simpsons/Marge");
  76     tree->add("Simpsons/Bart");
  77     tree->add("Simpsons/Lisa");
  78     tree->add("Pathnames/\\/bin");              // front slashes
  79     tree->add("Pathnames/\\/usr\\/sbin");
  80     tree->add("Pathnames/C:\\\\Program Files"); // backslashes
  81     tree->add("Pathnames/C:\\\\Documents and Settings");
  82
  83     // Start with some items closed
  84     tree->close("Simpsons");
  85     tree->close("Pathnames");
  86   }
  87   win->end();
  88   win->resizable(win);
  89   win->show(argc, argv);
  90   return(Fl::run());
  91 }
  92
  93 //
  94 // End of "$Id: tree-simple.cxx 8635 2011-05-06 04:27:49Z greg.ercolano $".
  95 //