src/Fl_display.cxx

   1 //
   2 // "$Id: Fl_display.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Display function for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 // Startup method to set what display to use.
  29 // Using setenv makes programs that are exec'd use the same display.
  30
  31 #include <FL/Fl.H>
  32 #include <stdlib.h>
  33 #include "flstring.h"
  34
  35 /**
  36     Sets the X display to use for all windows.  Actually this just sets
  37     the environment variable $DISPLAY to the passed string, so this only
  38     works before you show() the first window or otherwise open the display,
  39     and does nothing useful under WIN32.
  40 */
  41 void Fl::display(const char *d) {
  42 #if defined(__APPLE__) || defined(WIN32)
  43   (void)d;
  44 #else
  45   static char e[1024];
  46   strcpy(e,"DISPLAY=");
  47   strlcat(e,d,sizeof(e));
  48   for (char *c = e+8; *c!=':'; c++) {
  49     if (!*c) {
  50       strlcat(e,":0.0",sizeof(e));
  51       break;
  52     }
  53   }
  54   putenv(e);
  55 #endif // __APPLE__
  56 }
  57
  58 //
  59 // End of "$Id: Fl_display.cxx 7903 2010-11-28 21:06:39Z matt $".
  60 //