2 * menubox.c -- implements the menu box
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Changes by Clifford Wolf (god@clifford.at)
27 * *) A bugfix for the Page-Down problem
29 * *) Formerly when I used Page Down and Page Up, the cursor would be set
30 * to the first position in the menu box. Now lxdialog is a bit
31 * smarter and works more like other menu systems (just have a look at
34 * *) Formerly if I selected something my scrolling would be broken because
35 * lxdialog is re-invoked by the Menuconfig shell script, can't
36 * remember the last scrolling position, and just sets it so that the
37 * cursor is at the bottom of the box. Now it writes the temporary file
38 * lxdialog.scrltmp which contains this information. The file is
39 * deleted by lxdialog if the user leaves a submenu or enters a new
40 * one, but it would be nice if Menuconfig could make another "rm -f"
41 * just to be sure. Just try it out - you will recognise a difference!
45 * *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
46 * and menus change their size on the fly.
48 * *) If for some reason the last scrolling position is not saved by
49 * lxdialog, it sets the scrolling so that the selected item is in the
50 * middle of the menu box, not at the bottom.
52 * 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
53 * Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
54 * This fixes a bug in Menuconfig where using ' ' to descend into menus
55 * would leave mis-synchronized lxdialog.scrltmp files lying around,
56 * fscanf would read in 'scroll', and eventually that value would get used.
61 static int menu_width
, item_x
;
67 print_item (WINDOW
* win
, const char *item
, int choice
, int selected
, int hotkey
)
70 char menu_item
[menu_width
+1];
72 strncpy(menu_item
, item
, menu_width
);
73 menu_item
[menu_width
] = 0;
74 j
= first_alpha(menu_item
, "YyNnMm");
76 /* Clear 'residue' of last item */
77 wattrset (win
, menubox_attr
);
78 wmove (win
, choice
, 0);
82 for (i
= 0; i
< menu_width
; i
++)
88 wattrset (win
, selected
? item_selected_attr
: item_attr
);
89 mvwaddstr (win
, choice
, item_x
, menu_item
);
91 wattrset (win
, selected
? tag_key_selected_attr
: tag_key_attr
);
92 mvwaddch(win
, choice
, item_x
+j
, menu_item
[j
]);
95 wmove (win
, choice
, item_x
+1);
101 * Print the scroll indicators.
104 print_arrows (WINDOW
* win
, int item_no
, int scroll
,
105 int y
, int x
, int height
)
109 getyx(win
, cur_y
, cur_x
);
114 wattrset (win
, uarrow_attr
);
115 waddch (win
, ACS_UARROW
);
116 waddstr (win
, "(-)");
119 wattrset (win
, menubox_attr
);
120 waddch (win
, ACS_HLINE
);
121 waddch (win
, ACS_HLINE
);
122 waddch (win
, ACS_HLINE
);
123 waddch (win
, ACS_HLINE
);
129 if ((height
< item_no
) && (scroll
+ height
< item_no
)) {
130 wattrset (win
, darrow_attr
);
131 waddch (win
, ACS_DARROW
);
132 waddstr (win
, "(+)");
135 wattrset (win
, menubox_border_attr
);
136 waddch (win
, ACS_HLINE
);
137 waddch (win
, ACS_HLINE
);
138 waddch (win
, ACS_HLINE
);
139 waddch (win
, ACS_HLINE
);
142 wmove(win
, cur_y
, cur_x
);
146 * Display the termination buttons.
149 print_buttons (WINDOW
*win
, int height
, int width
, int selected
)
151 int x
= width
/ 2 - 16;
154 print_button (win
, "Select", y
, x
, selected
== 0);
155 print_button (win
, " Exit ", y
, x
+ 12, selected
== 1);
156 print_button (win
, " Help ", y
, x
+ 24, selected
== 2);
158 wmove(win
, y
, x
+1+12*selected
);
163 * Display a menu for choosing among a number of options
166 dialog_menu (const char *title
, const char *prompt
, int height
, int width
,
167 int menu_height
, const char *current
, int item_no
,
168 struct dialog_list_item
** items
)
170 int i
, j
, x
, y
, box_x
, box_y
;
171 int key
= 0, button
= 0, scroll
= 0, choice
= 0, first_item
= 0, max_choice
;
172 WINDOW
*dialog
, *menu
;
175 max_choice
= MIN (menu_height
, item_no
);
177 /* center dialog box on screen */
178 x
= (COLS
- width
) / 2;
179 y
= (LINES
- height
) / 2;
181 draw_shadow (stdscr
, y
, x
, height
, width
);
183 dialog
= newwin (height
, width
, y
, x
);
184 keypad (dialog
, TRUE
);
186 draw_box (dialog
, 0, 0, height
, width
, dialog_attr
, border_attr
);
187 wattrset (dialog
, border_attr
);
188 mvwaddch (dialog
, height
- 3, 0, ACS_LTEE
);
189 for (i
= 0; i
< width
- 2; i
++)
190 waddch (dialog
, ACS_HLINE
);
191 wattrset (dialog
, dialog_attr
);
192 wbkgdset (dialog
, dialog_attr
& A_COLOR
);
193 waddch (dialog
, ACS_RTEE
);
195 if (title
!= NULL
&& strlen(title
) >= width
-2 ) {
196 /* truncate long title -- mec */
197 char * title2
= malloc(width
-2+1);
198 memcpy( title2
, title
, width
-2 );
199 title2
[width
-2] = '\0';
204 wattrset (dialog
, title_attr
);
205 mvwaddch (dialog
, 0, (width
- strlen(title
))/2 - 1, ' ');
206 waddstr (dialog
, (char *)title
);
207 waddch (dialog
, ' ');
210 wattrset (dialog
, dialog_attr
);
211 print_autowrap (dialog
, prompt
, width
- 2, 1, 3);
213 menu_width
= width
- 6;
214 box_y
= height
- menu_height
- 5;
215 box_x
= (width
- menu_width
) / 2 - 1;
217 /* create new window for the menu */
218 menu
= subwin (dialog
, menu_height
, menu_width
,
219 y
+ box_y
+ 1, x
+ box_x
+ 1);
222 /* draw a box around the menu items */
223 draw_box (dialog
, box_y
, box_x
, menu_height
+ 2, menu_width
+ 2,
224 menubox_border_attr
, menubox_attr
);
227 * Find length of longest item in order to center menu.
228 * Set 'choice' to default item.
231 for (i
= 0; i
< item_no
; i
++) {
232 item_x
= MAX (item_x
, MIN(menu_width
, strlen (items
[i
]->name
) + 2));
233 if (strcmp(current
, items
[i
]->tag
) == 0) choice
= i
;
236 item_x
= (menu_width
- item_x
) / 2;
238 /* get the scroll info from the temp file */
239 if ( (f
=fopen("lxdialog.scrltmp","r")) != NULL
) {
240 if ( (fscanf(f
,"%d\n",&scroll
) == 1) && (scroll
<= choice
) &&
241 (scroll
+max_choice
> choice
) && (scroll
>= 0) &&
242 (scroll
+max_choice
<= item_no
) ) {
244 choice
= choice
- scroll
;
248 remove("lxdialog.scrltmp");
253 if ( (choice
>= max_choice
) || (f
==NULL
&& choice
>= max_choice
/2) ) {
254 if (choice
>= item_no
-max_choice
/2)
255 scroll
= first_item
= item_no
-max_choice
;
257 scroll
= first_item
= choice
- max_choice
/2;
258 choice
= choice
- scroll
;
262 for (i
=0; i
< max_choice
; i
++) {
263 print_item (menu
, items
[first_item
+ i
]->name
, i
, i
== choice
,
264 (items
[first_item
+ i
]->tag
[0] != ':'));
269 print_arrows(dialog
, item_no
, scroll
,
270 box_y
, box_x
+item_x
+1, menu_height
);
272 print_buttons (dialog
, height
, width
, 0);
273 wmove (menu
, choice
, item_x
+1);
279 if (key
< 256 && isalpha(key
)) key
= tolower(key
);
281 if (strchr("ynm", key
))
284 for (i
= choice
+1; i
< max_choice
; i
++) {
285 j
= first_alpha(items
[scroll
+ i
]->name
, "YyNnMm>");
286 if (key
== tolower(items
[scroll
+ i
]->name
[j
]))
290 for (i
= 0; i
< max_choice
; i
++) {
291 j
= first_alpha(items
[scroll
+ i
]->name
, "YyNnMm>");
292 if (key
== tolower(items
[scroll
+ i
]->name
[j
]))
297 if (i
< max_choice
||
298 key
== KEY_UP
|| key
== KEY_DOWN
||
299 key
== '-' || key
== '+' ||
300 key
== KEY_PPAGE
|| key
== KEY_NPAGE
) {
302 print_item (menu
, items
[scroll
+ choice
]->name
, choice
, FALSE
,
303 (items
[scroll
+ choice
]->tag
[0] != ':'));
305 if (key
== KEY_UP
|| key
== '-') {
306 if (choice
< 2 && scroll
) {
307 /* Scroll menu down */
308 scrollok (menu
, TRUE
);
310 scrollok (menu
, FALSE
);
314 print_item (menu
, items
[scroll
]->name
, 0, FALSE
,
315 (items
[scroll
]->tag
[0] != ':'));
317 choice
= MAX(choice
- 1, 0);
319 } else if (key
== KEY_DOWN
|| key
== '+') {
321 print_item (menu
, items
[scroll
+ choice
]->name
, choice
, FALSE
,
322 (items
[scroll
+ choice
]->tag
[0] != ':'));
324 if ((choice
> max_choice
-3) &&
325 (scroll
+ max_choice
< item_no
)
328 scrollok (menu
, TRUE
);
330 scrollok (menu
, FALSE
);
334 print_item (menu
, items
[scroll
+ max_choice
- 1]->name
,
336 (items
[scroll
+ max_choice
- 1]->tag
[0] != ':'));
338 choice
= MIN(choice
+1, max_choice
-1);
340 } else if (key
== KEY_PPAGE
) {
341 scrollok (menu
, TRUE
);
342 for (i
=0; (i
< max_choice
); i
++) {
346 print_item (menu
, items
[scroll
]->name
, 0, FALSE
,
347 (items
[scroll
]->tag
[0] != ':'));
353 scrollok (menu
, FALSE
);
355 } else if (key
== KEY_NPAGE
) {
356 for (i
=0; (i
< max_choice
); i
++) {
357 if (scroll
+max_choice
< item_no
) {
358 scrollok (menu
, TRUE
);
360 scrollok (menu
, FALSE
);
362 print_item (menu
, items
[scroll
+ max_choice
- 1]->name
,
364 (items
[scroll
+ max_choice
- 1]->tag
[0] != ':'));
366 if (choice
+1 < max_choice
)
374 print_item (menu
, items
[scroll
+ choice
]->name
, choice
, TRUE
,
375 (items
[scroll
+ choice
]->tag
[0] != ':'));
377 print_arrows(dialog
, item_no
, scroll
,
378 box_y
, box_x
+item_x
+1, menu_height
);
380 wnoutrefresh (dialog
);
383 continue; /* wait for another key press */
390 button
= ((key
== KEY_LEFT
? --button
: ++button
) < 0)
391 ? 2 : (button
> 2 ? 0 : button
);
393 print_buttons(dialog
, height
, width
, button
);
401 /* save scroll info */
402 if ( (f
=fopen("lxdialog.scrltmp","w")) != NULL
) {
403 fprintf(f
,"%d\n",scroll
);
407 items
[scroll
+ choice
]->selected
= 1;
421 items
[scroll
+ choice
]->selected
= 1;
423 remove("lxdialog.scrltmp");
434 remove("lxdialog.scrltmp");
435 return -1; /* ESC pressed */
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