lib/libmenu/post.c

   1 /*      $NetBSD: post.c,v 1.11 2003/03/09 01:08:48 lukem Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1998-1999 Brett Lymn (blymn@baea.com.au, brett_lymn@yahoo.com.au)
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  *
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __RCSID("$NetBSD: post.c,v 1.11 2003/03/09 01:08:48 lukem Exp $");
  31
  32 #include <menu.h>
  33 #include <stdlib.h>
  34 #include "internals.h"
  35
  36 /*
  37  * Post the menu to the screen.  Call any defined init routines and then
  38  * draw the menu on the screen.
  39  */
  40 int
  41 post_menu(MENU *menu)
  42 {
  43         int maxx, maxy, i;
  44
  45         if (menu == NULL)
  46                 return E_BAD_ARGUMENT;
  47         if (menu->posted == 1)
  48                 return E_POSTED;
  49         if (menu->in_init == 1)
  50                 return E_BAD_STATE;
  51         if (menu->items == NULL)
  52                 return E_NOT_CONNECTED;
  53         if (*menu->items == NULL)
  54                 return E_NOT_CONNECTED;
  55
  56         menu->in_init = 1;
  57
  58         if (menu->menu_init != NULL)
  59                 menu->menu_init(menu);
  60         if (menu->item_init != NULL)
  61                 menu->item_init(menu);
  62
  63         menu->in_init = 0;
  64
  65         getmaxyx(menu->scrwin, maxy, maxx);
  66         if ((maxx == ERR) || (maxy == ERR)) return E_SYSTEM_ERROR;
  67
  68         if ((menu->cols * menu->max_item_width + menu->cols - 1) > maxx)
  69                 return E_NO_ROOM;
  70
  71         if ((menu->opts & O_RADIO) != O_RADIO) {
  72                 for (i = 0; i < menu->item_count; i++) {
  73                         menu->items[i]->selected = 0;
  74                 }
  75         }
  76
  77         menu->posted = 1;
  78         return _menui_draw_menu(menu);
  79
  80 }
  81
  82 /*
  83  * Unpost the menu.  Call any defined termination routines and remove the
  84  * menu from the screen.
  85  */
  86 int
  87 unpost_menu(MENU *menu)
  88 {
  89         if (menu == NULL)
  90                 return E_BAD_ARGUMENT;
  91         if (menu->posted != 1)
  92                 return E_NOT_POSTED;
  93         if (menu->in_init == 1)
  94                 return E_BAD_STATE;
  95         if (menu->item_term != NULL)
  96                 menu->item_term(menu);
  97
  98         if (menu->menu_term != NULL)
  99                 menu->menu_term(menu);
 100
 101         menu->posted = 0;
 102         werase(menu->scrwin);
 103         wrefresh(menu->scrwin);
 104         return E_OK;
 105 }
 106
 107