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post.c revision 1.6.4.1 
      1 /*	$NetBSD: post.c,v 1.6.4.1 2000/08/26 12:36:56 blymn Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998-1999 Brett Lymn (blymn (at) baea.com.au, brett_lymn (at) 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 withough 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 <menu.h>
     30 #include <stdlib.h>
     31 #include "internals.h"
     32 
     33 /*
     34  * Post the menu to the screen.  Call any defined init routines and then
     35  * draw the menu on the screen.
     36  */
     37 int
     38 post_menu(MENU *menu)
     39 {
     40 	int maxx, maxy, i;
     41 
     42 	if (menu == NULL)
     43 		return E_BAD_ARGUMENT;
     44 	if (menu->posted == 1)
     45 		return E_POSTED;
     46 	if (menu->in_init == 1)
     47 		return E_BAD_STATE;
     48 	if (menu->items == NULL)
     49 		return E_NOT_CONNECTED;
     50 	if (*menu->items == NULL)
     51 		return E_NOT_CONNECTED;
     52 	if (menu->menu_win == NULL)
     53 		return E_BAD_ARGUMENT;
     54 
     55 	menu->in_init = 1;
     56 	menu->cur_item = 0; /* reset current item in case it was set before */
     57 	menu->top_row = 0; /* and the top row too */
     58 	if (menu->pattern != NULL) { /* and the pattern buffer....sigh */
     59 		free(menu->pattern);
     60 		menu->plen = 0;
     61 		menu->match_len = 0;
     62 	}
     63 
     64 	if (menu->menu_init != NULL)
     65 		menu->menu_init(menu);
     66 	if (menu->item_init != NULL)
     67 		menu->item_init(menu);
     68 
     69 	menu->in_init = 0;
     70 
     71 	if (menu->menu_subwin == NULL) {
     72 		menu->we_created = 1;
     73 		menu->menu_subwin = derwin(menu->menu_win, menu->rows,
     74 					   menu->cols * menu->max_item_width
     75 					   + menu->cols, 0, 0);
     76 		if (menu->menu_subwin == NULL) {
     77 			menu->we_created = 0;
     78 			return E_SYSTEM_ERROR;
     79 		}
     80 	}
     81 
     82 	getmaxyx(menu->menu_subwin, maxy, maxx);
     83 	if ((maxx == ERR) || (maxy == ERR)) return E_SYSTEM_ERROR;
     84 
     85 	if ((menu->cols * menu->max_item_width + menu->cols - 1) > maxx)
     86 		return E_NO_ROOM;
     87 
     88 	for (i = 0; i < menu->item_count; i++) {
     89 		menu->items[i]->selected = 0;
     90 	}
     91 
     92 	menu->posted = 1;
     93 	return _menui_draw_menu(menu);
     94 
     95 }
     96 
     97 /*
     98  * Unpost the menu.  Call any defined termination routines and remove the
     99  * menu from the screen.
    100  */
    101 int
    102 unpost_menu(MENU *menu)
    103 {
    104 	if (menu == NULL)
    105 		return E_BAD_ARGUMENT;
    106 	if (menu->posted != 1)
    107 		return E_NOT_POSTED;
    108 	if (menu->in_init == 1)
    109 		return E_BAD_STATE;
    110 	if (menu->menu_subwin == NULL)
    111 		return E_SYSTEM_ERROR;
    112 	if (menu->menu_win == NULL)
    113 		return E_SYSTEM_ERROR;
    114 
    115 	if (menu->item_term != NULL)
    116 		menu->item_term(menu);
    117 
    118 	if (menu->menu_term != NULL)
    119 		menu->menu_term(menu);
    120 
    121 	menu->posted = 0;
    122 	werase(menu->menu_subwin);
    123 	wrefresh(menu->menu_subwin);
    124 	if (menu->we_created == 1) {
    125 		delwin(menu->menu_subwin);
    126 		menu->menu_subwin = NULL;
    127 	}
    128 	wrefresh(menu->menu_win);
    129 	return E_OK;
    130 }
    131 
    132 
    133