source: trunk/ncurses/menu/m_post.c@ 2946

Last change on this file since 2946 was 2621, checked in by bird, 20 years ago

GNU ncurses 5.5
File size: 10.7 KB
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1/****************************************************************************
2 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29/****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_post *
35* Write or erase menus from associated subwindows *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_post.c,v 1.26 2004/12/25 23:57:04 tom Exp $")
41
42/*---------------------------------------------------------------------------
43| Facility : libnmenu
44| Function : void _nc_Post_Item(MENU *menu, ITEM *item)
45|
46| Description : Draw the item in the menus window at the current
47| window position
48|
49| Return Values : -
50+--------------------------------------------------------------------------*/
51NCURSES_EXPORT(void)
52_nc_Post_Item(const MENU * menu, const ITEM * item)
53{
54 int i;
55 chtype ch;
56 int item_x, item_y;
57 int count = 0;
58 bool isfore = FALSE, isback = FALSE, isgrey = FALSE;
59 int name_len;
60 int desc_len;
61
62 assert(menu->win);
63
64 getyx(menu->win, item_y, item_x);
65
66 /* We need a marker iff
67 - it is a onevalued menu and it is the current item
68 - or it has a selection value
69 */
70 wattron(menu->win, menu->back);
71 if (item->value || (item == menu->curitem))
72 {
73 if (menu->marklen)
74 {
75 /* In a multi selection menu we use the fore attribute
76 for a selected marker that is not the current one.
77 This improves visualization of the menu, because now
78 always the 'normal' marker denotes the current
79 item. */
80 if (!(menu->opt & O_ONEVALUE) && item->value && item != menu->curitem)
81 {
82 wattron(menu->win, menu->fore);
83 isfore = TRUE;
84 }
85 waddstr(menu->win, menu->mark);
86 if (isfore)
87 {
88 wattron(menu->win, menu->fore);
89 isfore = FALSE;
90 }
91 }
92 }
93 else /* otherwise we have to wipe out the marker area */
94 for (ch = ' ', i = menu->marklen; i > 0; i--)
95 waddch(menu->win, ch);
96 wattroff(menu->win, menu->back);
97 count += menu->marklen;
98
99 /* First we have to calculate the attribute depending on selectability
100 and selection status
101 */
102 if (!(item->opt & O_SELECTABLE))
103 {
104 wattron(menu->win, menu->grey);
105 isgrey = TRUE;
106 }
107 else
108 {
109 if (item->value || item == menu->curitem)
110 {
111 wattron(menu->win, menu->fore);
112 isfore = TRUE;
113 }
114 else
115 {
116 wattron(menu->win, menu->back);
117 isback = TRUE;
118 }
119 }
120
121 waddnstr(menu->win, item->name.str, item->name.length);
122 name_len = _nc_Calculate_Text_Width(&(item->name));
123 for (ch = ' ', i = menu->namelen - name_len; i > 0; i--)
124 {
125 waddch(menu->win, ch);
126 }
127 count += menu->namelen;
128
129 /* Show description if required and available */
130 if ((menu->opt & O_SHOWDESC) && menu->desclen > 0)
131 {
132 int m = menu->spc_desc / 2;
133 int cy = -1, cx = -1;
134
135 for (ch = ' ', i = 0; i < menu->spc_desc; i++)
136 {
137 if (i == m)
138 {
139 waddch(menu->win, menu->pad);
140 getyx(menu->win, cy, cx);
141 }
142 else
143 waddch(menu->win, ch);
144 }
145 if (item->description.length)
146 waddnstr(menu->win, item->description.str, item->description.length);
147 desc_len = _nc_Calculate_Text_Width(&(item->description));
148 for (ch = ' ', i = menu->desclen - desc_len; i > 0; i--)
149 {
150 waddch(menu->win, ch);
151 }
152 count += menu->desclen + menu->spc_desc;
153
154 if (menu->spc_rows > 1)
155 {
156 int j, k, ncy, ncx;
157
158 assert(cx >= 0 && cy >= 0);
159 getyx(menu->win, ncy, ncx);
160 if (isgrey)
161 wattroff(menu->win, menu->grey);
162 else if (isfore)
163 wattroff(menu->win, menu->fore);
164 wattron(menu->win, menu->back);
165 for (j = 1; j < menu->spc_rows; j++)
166 {
167 if ((item_y + j) < getmaxy(menu->win))
168 {
169 wmove(menu->win, item_y + j, item_x);
170 for (k = 0; k < count; k++)
171 waddch(menu->win, ' ');
172 }
173 if ((cy + j) < getmaxy(menu->win))
174 mvwaddch(menu->win, cy + j, cx - 1, menu->pad);
175 }
176 wmove(menu->win, ncy, ncx);
177 if (!isback)
178 wattroff(menu->win, menu->back);
179 }
180 }
181
182 /* Remove attributes */
183 if (isfore)
184 wattroff(menu->win, menu->fore);
185 if (isback)
186 wattroff(menu->win, menu->back);
187 if (isgrey)
188 wattroff(menu->win, menu->grey);
189}
190
191/*---------------------------------------------------------------------------
192| Facility : libnmenu
193| Function : void _nc_Draw_Menu(const MENU *)
194|
195| Description : Display the menu in its windows
196|
197| Return Values : -
198+--------------------------------------------------------------------------*/
199NCURSES_EXPORT(void)
200_nc_Draw_Menu(const MENU * menu)
201{
202 ITEM *item = menu->items[0];
203 ITEM *lasthor, *lastvert;
204 ITEM *hitem;
205 int y = 0;
206 chtype s_bkgd;
207
208 assert(item && menu->win);
209
210 s_bkgd = getbkgd(menu->win);
211 wbkgdset(menu->win, menu->back);
212 werase(menu->win);
213 wbkgdset(menu->win, s_bkgd);
214
215 lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : item;
216
217 do
218 {
219 wmove(menu->win, y, 0);
220
221 hitem = item;
222 lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : hitem;
223
224 do
225 {
226 _nc_Post_Item(menu, hitem);
227
228 wattron(menu->win, menu->back);
229 if (((hitem = hitem->right) != lasthor) && hitem)
230 {
231 int i, j, cy, cx;
232 chtype ch = ' ';
233
234 getyx(menu->win, cy, cx);
235 for (j = 0; j < menu->spc_rows; j++)
236 {
237 wmove(menu->win, cy + j, cx);
238 for (i = 0; i < menu->spc_cols; i++)
239 {
240 waddch(menu->win, ch);
241 }
242 }
243 wmove(menu->win, cy, cx + menu->spc_cols);
244 }
245 }
246 while (hitem && (hitem != lasthor));
247 wattroff(menu->win, menu->back);
248
249 item = item->down;
250 y += menu->spc_rows;
251
252 }
253 while (item && (item != lastvert));
254}
255
256/*---------------------------------------------------------------------------
257| Facility : libnmenu
258| Function : int post_menu(MENU *)
259|
260| Description : Post a menu to the screen. This makes it visible.
261|
262| Return Values : E_OK - success
263| E_BAD_ARGUMENT - not a valid menu pointer
264| E_SYSTEM_ERROR - error in lower layers
265| E_NOT_CONNECTED - No items connected to menu
266| E_BAD_STATE - Menu in userexit routine
267| E_POSTED - Menu already posted
268+--------------------------------------------------------------------------*/
269NCURSES_EXPORT(int)
270post_menu(MENU * menu)
271{
272 T((T_CALLED("post_menu(%p)"), menu));
273
274 if (!menu)
275 RETURN(E_BAD_ARGUMENT);
276
277 if (menu->status & _IN_DRIVER)
278 RETURN(E_BAD_STATE);
279
280 if (menu->status & _POSTED)
281 RETURN(E_POSTED);
282
283 if (menu->items && *(menu->items))
284 {
285 int y;
286 int h = 1 + menu->spc_rows * (menu->rows - 1);
287
288 WINDOW *win = Get_Menu_Window(menu);
289 int maxy = getmaxy(win);
290
291 if ((menu->win = newpad(h, menu->width)))
292 {
293 y = (maxy >= h) ? h : maxy;
294 if (y >= menu->height)
295 y = menu->height;
296 if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0)))
297 RETURN(E_SYSTEM_ERROR);
298 }
299 else
300 RETURN(E_SYSTEM_ERROR);
301
302 if (menu->status & _LINK_NEEDED)
303 _nc_Link_Items(menu);
304 }
305 else
306 RETURN(E_NOT_CONNECTED);
307
308 menu->status |= _POSTED;
309
310 if (!(menu->opt & O_ONEVALUE))
311 {
312 ITEM **items;
313
314 for (items = menu->items; *items; items++)
315 {
316 (*items)->value = FALSE;
317 }
318 }
319
320 _nc_Draw_Menu(menu);
321
322 Call_Hook(menu, menuinit);
323 Call_Hook(menu, iteminit);
324
325 _nc_Show_Menu(menu);
326
327 RETURN(E_OK);
328}
329
330/*---------------------------------------------------------------------------
331| Facility : libnmenu
332| Function : int unpost_menu(MENU *)
333|
334| Description : Detach menu from screen
335|
336| Return Values : E_OK - success
337| E_BAD_ARGUMENT - not a valid menu pointer
338| E_BAD_STATE - menu in userexit routine
339| E_NOT_POSTED - menu is not posted
340+--------------------------------------------------------------------------*/
341NCURSES_EXPORT(int)
342unpost_menu(MENU * menu)
343{
344 WINDOW *win;
345
346 T((T_CALLED("unpost_menu(%p)"), menu));
347
348 if (!menu)
349 RETURN(E_BAD_ARGUMENT);
350
351 if (menu->status & _IN_DRIVER)
352 RETURN(E_BAD_STATE);
353
354 if (!(menu->status & _POSTED))
355 RETURN(E_NOT_POSTED);
356
357 Call_Hook(menu, itemterm);
358 Call_Hook(menu, menuterm);
359
360 win = Get_Menu_Window(menu);
361 werase(win);
362 wsyncup(win);
363
364 assert(menu->sub);
365 delwin(menu->sub);
366 menu->sub = (WINDOW *)0;
367
368 assert(menu->win);
369 delwin(menu->win);
370 menu->win = (WINDOW *)0;
371
372 menu->status &= ~_POSTED;
373
374 RETURN(E_OK);
375}
376
377/* m_post.c ends here */
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