lib/focus.c

   1 /* Dia -- a diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19
  20 #include <config.h>
  21
  22 #include "focus.h"
  23
  24 static Focus *active_focus_ptr = NULL;
  25
  26 void
  27 request_focus(Focus *focus)
  28 {
  29   if (active_focus_ptr != NULL) {
  30     active_focus_ptr->has_focus = FALSE;
  31   }
  32   active_focus_ptr = focus;
  33   active_focus_ptr->has_focus = TRUE;
  34 }
  35
  36 Focus *
  37 active_focus(void)
  38 {
  39   return active_focus_ptr;
  40 }
  41
  42 void
  43 remove_focus(void)
  44 {
  45   if (active_focus_ptr != NULL) {
  46     active_focus_ptr->has_focus = FALSE;
  47   }
  48   active_focus_ptr = NULL;
  49 }