source: 2.3/menu/lxdialog/checklist.c@ fd48886

2.3 2.4 ablfs ablfs-more legacy new_features trunk
Last change on this file since fd48886 was fd48886, checked in by Manuel Canales Esparcia <manuel@…>, 17 years ago

Tagged 2.3 release.
  • Property mode set to 100644
File size: 9.6 KB
RevLine 
[fd48886]1/*
2 * checklist.c -- implements the checklist box
3 *
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
6 * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
7 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include "dialog.h"
25
26static int list_width, check_x, item_x, checkflag;
27
28/*
29 * Print list item
30 */
31static void
32print_item (WINDOW * win, const char *item, int status,
33 int choice, int selected)
34{
35 int i;
36
37 /* Clear 'residue' of last item */
38 wattrset (win, menubox_attr);
39 wmove (win, choice, 0);
40 for (i = 0; i < list_width; i++)
41 waddch (win, ' ');
42
43 wmove (win, choice, check_x);
44 wattrset (win, selected ? check_selected_attr : check_attr);
45 if (checkflag == FLAG_CHECK)
46 wprintw (win, "[%c]", status ? 'X' : ' ');
47 else
48 wprintw (win, "(%c)", status ? 'X' : ' ');
49
50 wattrset (win, selected ? tag_selected_attr : tag_attr);
51 mvwaddch(win, choice, item_x, item[0]);
52 wattrset (win, selected ? item_selected_attr : item_attr);
53 waddstr (win, (char *)item+1);
54 if (selected) {
55 wmove (win, choice, check_x+1);
56 wrefresh (win);
57 }
58}
59
60/*
61 * Print the scroll indicators.
62 */
63static void
64print_arrows (WINDOW * win, int choice, int item_no, int scroll,
65 int y, int x, int height)
66{
67 wmove(win, y, x);
68
69 if (scroll > 0) {
70 wattrset (win, uarrow_attr);
71 waddch (win, ACS_UARROW);
72 waddstr (win, "(-)");
73 }
74 else {
75 wattrset (win, menubox_attr);
76 waddch (win, ACS_HLINE);
77 waddch (win, ACS_HLINE);
78 waddch (win, ACS_HLINE);
79 waddch (win, ACS_HLINE);
80 }
81
82 y = y + height + 1;
83 wmove(win, y, x);
84
85 if ((height < item_no) && (scroll + choice < item_no - 1)) {
86 wattrset (win, darrow_attr);
87 waddch (win, ACS_DARROW);
88 waddstr (win, "(+)");
89 }
90 else {
91 wattrset (win, menubox_border_attr);
92 waddch (win, ACS_HLINE);
93 waddch (win, ACS_HLINE);
94 waddch (win, ACS_HLINE);
95 waddch (win, ACS_HLINE);
96 }
97}
98
99/*
100 * Display the termination buttons
101 */
102static void
103print_buttons( WINDOW *dialog, int height, int width, int selected)
104{
105 int x = width / 2 - 11;
106 int y = height - 2;
107
108 print_button (dialog, "Select", y, x, selected == 0);
109 print_button (dialog, " Help ", y, x + 14, selected == 1);
110
111 wmove(dialog, y, x+1 + 14*selected);
112 wrefresh (dialog);
113}
114
115/*
116 * Display a dialog box with a list of options that can be turned on or off
117 * The `flag' parameter is used to select between radiolist and checklist.
118 */
119int
120dialog_checklist (const char *title, const char *prompt, int height, int width,
121 int list_height, int item_no, struct dialog_list_item ** items,
122 int flag)
123
124{
125 int i, x, y, box_x, box_y;
126 int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
127 WINDOW *dialog, *list;
128
129 checkflag = flag;
130
131 /* Allocate space for storing item on/off status */
132 if ((status = malloc (sizeof (int) * item_no)) == NULL) {
133 endwin ();
134 fprintf (stderr,
135 "\nCan't allocate memory in dialog_checklist().\n");
136 exit (-1);
137 }
138
139 /* Initializes status */
140 for (i = 0; i < item_no; i++) {
141 status[i] = (items[i]->selected == 1); /* ON */
142 if ((!choice && status[i]) || items[i]->selected == 2) /* SELECTED */
143 choice = i + 1;
144 }
145 if (choice)
146 choice--;
147
148 max_choice = MIN (list_height, item_no);
149
150 /* center dialog box on screen */
151 x = (COLS - width) / 2;
152 y = (LINES - height) / 2;
153
154 draw_shadow (stdscr, y, x, height, width);
155
156 dialog = newwin (height, width, y, x);
157 keypad (dialog, TRUE);
158
159 draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
160 wattrset (dialog, border_attr);
161 mvwaddch (dialog, height-3, 0, ACS_LTEE);
162 for (i = 0; i < width - 2; i++)
163 waddch (dialog, ACS_HLINE);
164 wattrset (dialog, dialog_attr);
165 waddch (dialog, ACS_RTEE);
166
167 if (title != NULL && strlen(title) >= width-2 ) {
168 /* truncate long title -- mec */
169 char * title2 = malloc(width-2+1);
170 memcpy( title2, title, width-2 );
171 title2[width-2] = '\0';
172 title = title2;
173 }
174
175 if (title != NULL) {
176 wattrset (dialog, title_attr);
177 mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
178 waddstr (dialog, (char *)title);
179 waddch (dialog, ' ');
180 }
181
182 wattrset (dialog, dialog_attr);
183 print_autowrap (dialog, prompt, width - 2, 1, 3);
184
185 list_width = width - 6;
186 box_y = height - list_height - 5;
187 box_x = (width - list_width) / 2 - 1;
188
189 /* create new window for the list */
190 list = subwin (dialog, list_height, list_width, y+box_y+1, x+box_x+1);
191
192 keypad (list, TRUE);
193
194 /* draw a box around the list items */
195 draw_box (dialog, box_y, box_x, list_height + 2, list_width + 2,
196 menubox_border_attr, menubox_attr);
197
198 /* Find length of longest item in order to center checklist */
199 check_x = 0;
200 for (i = 0; i < item_no; i++)
201 check_x = MAX (check_x, + strlen (items[i]->name) + 4);
202
203 check_x = (list_width - check_x) / 2;
204 item_x = check_x + 4;
205
206 if (choice >= list_height) {
207 scroll = choice - list_height + 1;
208 choice -= scroll;
209 }
210
211 /* Print the list */
212 for (i = 0; i < max_choice; i++) {
213 print_item (list, items[scroll + i]->name,
214 status[i+scroll], i, i == choice);
215 }
216
217 print_arrows(dialog, choice, item_no, scroll,
218 box_y, box_x + check_x + 5, list_height);
219
220 print_buttons(dialog, height, width, 0);
221
222 wnoutrefresh (list);
223 wnoutrefresh (dialog);
224 doupdate ();
225
226 while (key != ESC) {
227 key = wgetch (dialog);
228
229 for (i = 0; i < max_choice; i++)
230 if (toupper(key) == toupper(items[scroll + i]->name[0]))
231 break;
232
233
234 if ( i < max_choice || key == KEY_UP || key == KEY_DOWN ||
235 key == '+' || key == '-' ) {
236 if (key == KEY_UP || key == '-') {
237 if (!choice) {
238 if (!scroll)
239 continue;
240 /* Scroll list down */
241 if (list_height > 1) {
242 /* De-highlight current first item */
243 print_item (list, items[scroll]->name,
244 status[scroll], 0, FALSE);
245 scrollok (list, TRUE);
246 wscrl (list, -1);
247 scrollok (list, FALSE);
248 }
249 scroll--;
250 print_item (list, items[scroll]->name,
251 status[scroll], 0, TRUE);
252 wnoutrefresh (list);
253
254 print_arrows(dialog, choice, item_no, scroll,
255 box_y, box_x + check_x + 5, list_height);
256
257 wrefresh (dialog);
258
259 continue; /* wait for another key press */
260 } else
261 i = choice - 1;
262 } else if (key == KEY_DOWN || key == '+') {
263 if (choice == max_choice - 1) {
264 if (scroll + choice >= item_no - 1)
265 continue;
266 /* Scroll list up */
267 if (list_height > 1) {
268 /* De-highlight current last item before scrolling up */
269 print_item (list, items[scroll + max_choice - 1]->name,
270 status[scroll + max_choice - 1],
271 max_choice - 1, FALSE);
272 scrollok (list, TRUE);
273 scroll (list);
274 scrollok (list, FALSE);
275 }
276 scroll++;
277 print_item (list, items[scroll + max_choice - 1]->name,
278 status[scroll + max_choice - 1],
279 max_choice - 1, TRUE);
280 wnoutrefresh (list);
281
282 print_arrows(dialog, choice, item_no, scroll,
283 box_y, box_x + check_x + 5, list_height);
284
285 wrefresh (dialog);
286
287 continue; /* wait for another key press */
288 } else
289 i = choice + 1;
290 }
291 if (i != choice) {
292 /* De-highlight current item */
293 print_item (list, items[scroll + choice]->name,
294 status[scroll + choice], choice, FALSE);
295 /* Highlight new item */
296 choice = i;
297 print_item (list, items[scroll + choice]->name,
298 status[scroll + choice], choice, TRUE);
299 wnoutrefresh (list);
300 wrefresh (dialog);
301 }
302 continue; /* wait for another key press */
303 }
304 switch (key) {
305 case 'H':
306 case 'h':
307 case '?':
308 for (i = 0; i < item_no; i++)
309 items[i]->selected = 0;
310 items[scroll + choice]->selected = 1;
311 delwin (dialog);
312 free (status);
313 return 1;
314 case TAB:
315 case KEY_LEFT:
316 case KEY_RIGHT:
317 button = ((key == KEY_LEFT ? --button : ++button) < 0)
318 ? 1 : (button > 1 ? 0 : button);
319
320 print_buttons(dialog, height, width, button);
321 wrefresh (dialog);
322 break;
323 case 'S':
324 case 's':
325 case ' ':
326 case '\n':
327 if (!button) {
328 if (flag == FLAG_CHECK) {
329 status[scroll + choice] = !status[scroll + choice];
330 wmove (list, choice, check_x);
331 wattrset (list, check_selected_attr);
332 wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');
333 } else {
334 if (!status[scroll + choice]) {
335 for (i = 0; i < item_no; i++)
336 status[i] = 0;
337 status[scroll + choice] = 1;
338 for (i = 0; i < max_choice; i++)
339 print_item (list, items[scroll + i]->name,
340 status[scroll + i], i, i == choice);
341 }
342 }
343 wnoutrefresh (list);
344 wrefresh (dialog);
345
346 for (i = 0; i < item_no; i++) {
347 items[i]->selected = status[i];
348 }
349 } else {
350 for (i = 0; i < item_no; i++)
351 items[i]->selected = 0;
352 items[scroll + choice]->selected = 1;
353 }
354 delwin (dialog);
355 free (status);
356 return button;
357 case 'X':
358 case 'x':
359 key = ESC;
360 case ESC:
361 break;
362 }
363
364 /* Now, update everything... */
365 doupdate ();
366 }
367
368
369 delwin (dialog);
370 free (status);
371 return -1; /* ESC pressed */
372}
Note: See TracBrowser for help on using the repository browser.