examples/menubar-add.cxx

   1 //
   2 // "$Id: menubar-add.cxx 8183 2011-01-04 17:31:56Z AlbrechtS $"
   3 //
   4 //      An example of using Fl_Menu_Bar's add() to dynamically create menubars
   5 //
   6 //      Menu bars can be created several ways. Using add() allows
   7 //      dynamically creating a menubar using a 'pathname' syntax.
   8 //      Use if you're creating items dynamically, or if you're making
   9 //      menubars by hand (as opposed to using fluid), as it's easier
  10 //      to type and read.
  11 //
  12 //      In this case we're using one callback for all items,
  13 //      but you can make unique callbacks for each item if needed.
  14 //
  15 // Copyright 2010 Greg Ercolano.
  16 // Copyright 1998-2010 by Bill Spitzak and others.
  17 //
  18 // This library is free software; you can redistribute it and/or
  19 // modify it under the terms of the GNU Library General Public
  20 // License as published by the Free Software Foundation; either
  21 // version 2 of the License, or (at your option) any later version.
  22 //
  23 // This library is distributed in the hope that it will be useful,
  24 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  25 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  26 // Library General Public License for more details.
  27 //
  28 // You should have received a copy of the GNU Library General Public
  29 // License along with this library; if not, write to the Free Software
  30 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  31 // USA.
  32 //
  33 // Please report all bugs and problems on the following page:
  34 //
  35 //     http://www.fltk.org/str.php
  36 //
  37 #include <stdio.h>                      // fprintf()
  38 #include <stdlib.h>                     // exit()
  39 #include <string.h>                     // strcmp()
  40 #include <FL/Fl.H>
  41 #include <FL/Fl_Window.H>
  42 #include <FL/Fl_Menu_Bar.H>
  43 #include <FL/filename.H>                // fl_open_uri()
  44
  45 // This callback is invoked whenever the user clicks an item in the menu bar
  46 static void MyMenuCallback(Fl_Widget *w, void *) {
  47   Fl_Menu_Bar *bar = (Fl_Menu_Bar*)w;                           // Get the menubar widget
  48   const Fl_Menu_Item *item = bar->mvalue();                     // Get the menu item that was picked
  49
  50   char ipath[256]; bar->item_pathname(ipath, sizeof(ipath));    // Get full pathname of picked item
  51
  52   fprintf(stderr, "callback: You picked '%s'", item->label());  // Print item picked
  53   fprintf(stderr, ", item_pathname() is '%s'", ipath);          // ..and full pathname
  54
  55   if ( item->flags & (FL_MENU_RADIO|FL_MENU_TOGGLE) ) {         // Toggle or radio item?
  56     fprintf(stderr, ", value is %s", item->value()?"on":"off"); // Print item's value
  57   }
  58   fprintf(stderr, "\n");
  59   if ( strcmp(item->label(), "Google") == 0 ) { fl_open_uri("http://google.com/"); }
  60   if ( strcmp(item->label(), "&Quit") == 0 ) { exit(0); }
  61 }
  62
  63 int main() {
  64   Fl::scheme("gtk+");
  65   Fl_Window *win = new Fl_Window(400,200, "menubar-simple");    // Create window
  66   Fl_Menu_Bar *menu = new Fl_Menu_Bar(0,0,400,25);              // Create menubar, items..
  67   menu->add("&File/&Open",  "^o", MyMenuCallback);
  68   menu->add("&File/&Save",  "^s", MyMenuCallback, 0, FL_MENU_DIVIDER);
  69   menu->add("&File/&Quit",  "^q", MyMenuCallback);
  70   menu->add("&Edit/&Copy",  "^c", MyMenuCallback);
  71   menu->add("&Edit/&Paste", "^v", MyMenuCallback, 0, FL_MENU_DIVIDER);
  72   menu->add("&Edit/Radio 1",   0, MyMenuCallback, 0, FL_MENU_RADIO);
  73   menu->add("&Edit/Radio 2",   0, MyMenuCallback, 0, FL_MENU_RADIO|FL_MENU_DIVIDER);
  74   menu->add("&Edit/Toggle 1",  0, MyMenuCallback, 0, FL_MENU_TOGGLE);                   // Default: off
  75   menu->add("&Edit/Toggle 2",  0, MyMenuCallback, 0, FL_MENU_TOGGLE);                   // Default: off
  76   menu->add("&Edit/Toggle 3",  0, MyMenuCallback, 0, FL_MENU_TOGGLE|FL_MENU_VALUE);     // Default: on
  77   menu->add("&Help/Google",    0, MyMenuCallback);
  78
  79   // Example: show how we can dynamically change the state of item Toggle #2 (turn it 'on')
  80   {
  81       Fl_Menu_Item *item = (Fl_Menu_Item*)menu->find_item("&Edit/Toggle 2");    // Find item
  82       if ( item ) item->set();                                                  // Turn it on
  83       else fprintf(stderr, "'Toggle 2' item not found?!\n");                    // (optional) Not found? complain!
  84   }
  85
  86   win->end();
  87   win->show();
  88   return(Fl::run());
  89 }
  90
  91 //
  92 // End of "$Id: menubar-add.cxx 8183 2011-01-04 17:31:56Z AlbrechtS $".
  93 //