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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 | |
26 | static int list_width, check_x, item_x; |
27 | |
28 | /* |
29 | * Print list item |
30 | */ |
31 | static void print_item(WINDOW * win, int choice, int selected) |
32 | { |
33 | int i; |
34 | char *list_item = malloc(list_width + 1); |
35 | |
36 | strncpy(list_item, item_str(), list_width - item_x); |
37 | list_item[list_width - item_x] = '\0'; |
38 | |
39 | /* Clear 'residue' of last item */ |
40 | wattrset(win, dlg.menubox.atr); |
41 | wmove(win, choice, 0); |
42 | for (i = 0; i < list_width; i++) |
43 | waddch(win, ' '); |
44 | |
45 | wmove(win, choice, check_x); |
46 | wattrset(win, selected ? dlg.check_selected.atr |
47 | : dlg.check.atr); |
48 | if (!item_is_tag(':')) |
49 | wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' '); |
50 | |
51 | wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr); |
52 | mvwaddch(win, choice, item_x, list_item[0]); |
53 | wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr); |
54 | waddstr(win, list_item + 1); |
55 | if (selected) { |
56 | wmove(win, choice, check_x + 1); |
57 | wrefresh(win); |
58 | } |
59 | free(list_item); |
60 | } |
61 | |
62 | /* |
63 | * Print the scroll indicators. |
64 | */ |
65 | static void print_arrows(WINDOW * win, int choice, int item_no, int scroll, |
66 | int y, int x, int height) |
67 | { |
68 | wmove(win, y, x); |
69 | |
70 | if (scroll > 0) { |
71 | wattrset(win, dlg.uarrow.atr); |
72 | waddch(win, ACS_UARROW); |
73 | waddstr(win, "(-)"); |
74 | } else { |
75 | wattrset(win, dlg.menubox.atr); |
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, dlg.darrow.atr); |
87 | waddch(win, ACS_DARROW); |
88 | waddstr(win, "(+)"); |
89 | } else { |
90 | wattrset(win, dlg.menubox_border.atr); |
91 | waddch(win, ACS_HLINE); |
92 | waddch(win, ACS_HLINE); |
93 | waddch(win, ACS_HLINE); |
94 | waddch(win, ACS_HLINE); |
95 | } |
96 | } |
97 | |
98 | /* |
99 | * Display the termination buttons |
100 | */ |
101 | static void print_buttons(WINDOW * dialog, int height, int width, int selected) |
102 | { |
103 | int x = width / 2 - 11; |
104 | int y = height - 2; |
105 | |
106 | print_button(dialog, gettext("Select"), y, x, selected == 0); |
107 | print_button(dialog, gettext(" Help "), y, x + 14, selected == 1); |
108 | |
109 | wmove(dialog, y, x + 1 + 14 * selected); |
110 | wrefresh(dialog); |
111 | } |
112 | |
113 | /* |
114 | * Display a dialog box with a list of options that can be turned on or off |
115 | * in the style of radiolist (only one option turned on at a time). |
116 | */ |
117 | int dialog_checklist(const char *title, const char *prompt, int height, |
118 | int width, int list_height) |
119 | { |
120 | int i, x, y, box_x, box_y; |
121 | int key = 0, button = 0, choice = 0, scroll = 0, max_choice; |
122 | WINDOW *dialog, *list; |
123 | |
124 | /* which item to highlight */ |
125 | item_foreach() { |
126 | if (item_is_tag('X')) |
127 | choice = item_n(); |
128 | if (item_is_selected()) { |
129 | choice = item_n(); |
130 | break; |
131 | } |
132 | } |
133 | |
134 | do_resize: |
135 | if (getmaxy(stdscr) < (height + 6)) |
136 | return -ERRDISPLAYTOOSMALL; |
137 | if (getmaxx(stdscr) < (width + 6)) |
138 | return -ERRDISPLAYTOOSMALL; |
139 | |
140 | max_choice = MIN(list_height, item_count()); |
141 | |
142 | /* center dialog box on screen */ |
143 | x = (COLS - width) / 2; |
144 | y = (LINES - height) / 2; |
145 | |
146 | draw_shadow(stdscr, y, x, height, width); |
147 | |
148 | dialog = newwin(height, width, y, x); |
149 | keypad(dialog, TRUE); |
150 | |
151 | draw_box(dialog, 0, 0, height, width, |
152 | dlg.dialog.atr, dlg.border.atr); |
153 | wattrset(dialog, dlg.border.atr); |
154 | mvwaddch(dialog, height - 3, 0, ACS_LTEE); |
155 | for (i = 0; i < width - 2; i++) |
156 | waddch(dialog, ACS_HLINE); |
157 | wattrset(dialog, dlg.dialog.atr); |
158 | waddch(dialog, ACS_RTEE); |
159 | |
160 | print_title(dialog, title, width); |
161 | |
162 | wattrset(dialog, dlg.dialog.atr); |
163 | print_autowrap(dialog, prompt, width - 2, 1, 3); |
164 | |
165 | list_width = width - 6; |
166 | box_y = height - list_height - 5; |
167 | box_x = (width - list_width) / 2 - 1; |
168 | |
169 | /* create new window for the list */ |
170 | list = subwin(dialog, list_height, list_width, y + box_y + 1, |
171 | x + box_x + 1); |
172 | |
173 | keypad(list, TRUE); |
174 | |
175 | /* draw a box around the list items */ |
176 | draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, |
177 | dlg.menubox_border.atr, dlg.menubox.atr); |
178 | |
179 | /* Find length of longest item in order to center checklist */ |
180 | check_x = 0; |
181 | item_foreach() |
182 | check_x = MAX(check_x, strlen(item_str()) + 4); |
183 | check_x = MIN(check_x, list_width); |
184 | |
185 | check_x = (list_width - check_x) / 2; |
186 | item_x = check_x + 4; |
187 | |
188 | if (choice >= list_height) { |
189 | scroll = choice - list_height + 1; |
190 | choice -= scroll; |
191 | } |
192 | |
193 | /* Print the list */ |
194 | for (i = 0; i < max_choice; i++) { |
195 | item_set(scroll + i); |
196 | print_item(list, i, i == choice); |
197 | } |
198 | |
199 | print_arrows(dialog, choice, item_count(), scroll, |
200 | box_y, box_x + check_x + 5, list_height); |
201 | |
202 | print_buttons(dialog, height, width, 0); |
203 | |
204 | wnoutrefresh(dialog); |
205 | wnoutrefresh(list); |
206 | doupdate(); |
207 | |
208 | while (key != KEY_ESC) { |
209 | key = wgetch(dialog); |
210 | |
211 | for (i = 0; i < max_choice; i++) { |
212 | item_set(i + scroll); |
213 | if (toupper(key) == toupper(item_str()[0])) |
214 | break; |
215 | } |
216 | |
217 | if (i < max_choice || key == KEY_UP || key == KEY_DOWN || |
218 | key == '+' || key == '-') { |
219 | if (key == KEY_UP || key == '-') { |
220 | if (!choice) { |
221 | if (!scroll) |
222 | continue; |
223 | /* Scroll list down */ |
224 | if (list_height > 1) { |
225 | /* De-highlight current first item */ |
226 | item_set(scroll); |
227 | print_item(list, 0, FALSE); |
228 | scrollok(list, TRUE); |
229 | wscrl(list, -1); |
230 | scrollok(list, FALSE); |
231 | } |
232 | scroll--; |
233 | item_set(scroll); |
234 | print_item(list, 0, TRUE); |
235 | print_arrows(dialog, choice, item_count(), |
236 | scroll, box_y, box_x + check_x + 5, list_height); |
237 | |
238 | wnoutrefresh(dialog); |
239 | wrefresh(list); |
240 | |
241 | continue; /* wait for another key press */ |
242 | } else |
243 | i = choice - 1; |
244 | } else if (key == KEY_DOWN || key == '+') { |
245 | if (choice == max_choice - 1) { |
246 | if (scroll + choice >= item_count() - 1) |
247 | continue; |
248 | /* Scroll list up */ |
249 | if (list_height > 1) { |
250 | /* De-highlight current last item before scrolling up */ |
251 | item_set(scroll + max_choice - 1); |
252 | print_item(list, |
253 | max_choice - 1, |
254 | FALSE); |
255 | scrollok(list, TRUE); |
256 | wscrl(list, 1); |
257 | scrollok(list, FALSE); |
258 | } |
259 | scroll++; |
260 | item_set(scroll + max_choice - 1); |
261 | print_item(list, max_choice - 1, TRUE); |
262 | |
263 | print_arrows(dialog, choice, item_count(), |
264 | scroll, box_y, box_x + check_x + 5, list_height); |
265 | |
266 | wnoutrefresh(dialog); |
267 | wrefresh(list); |
268 | |
269 | continue; /* wait for another key press */ |
270 | } else |
271 | i = choice + 1; |
272 | } |
273 | if (i != choice) { |
274 | /* De-highlight current item */ |
275 | item_set(scroll + choice); |
276 | print_item(list, choice, FALSE); |
277 | /* Highlight new item */ |
278 | choice = i; |
279 | item_set(scroll + choice); |
280 | print_item(list, choice, TRUE); |
281 | wnoutrefresh(dialog); |
282 | wrefresh(list); |
283 | } |
284 | continue; /* wait for another key press */ |
285 | } |
286 | switch (key) { |
287 | case 'H': |
288 | case 'h': |
289 | case '?': |
290 | button = 1; |
291 | /* fall-through */ |
292 | case 'S': |
293 | case 's': |
294 | case ' ': |
295 | case '\n': |
296 | item_foreach() |
297 | item_set_selected(0); |
298 | item_set(scroll + choice); |
299 | item_set_selected(1); |
300 | delwin(list); |
301 | delwin(dialog); |
302 | return button; |
303 | case TAB: |
304 | case KEY_LEFT: |
305 | case KEY_RIGHT: |
306 | button = ((key == KEY_LEFT ? --button : ++button) < 0) |
307 | ? 1 : (button > 1 ? 0 : button); |
308 | |
309 | print_buttons(dialog, height, width, button); |
310 | wrefresh(dialog); |
311 | break; |
312 | case 'X': |
313 | case 'x': |
314 | key = KEY_ESC; |
315 | break; |
316 | case KEY_ESC: |
317 | key = on_key_esc(dialog); |
318 | break; |
319 | case KEY_RESIZE: |
320 | delwin(list); |
321 | delwin(dialog); |
322 | on_key_resize(); |
323 | goto do_resize; |
324 | } |
325 | |
326 | /* Now, update everything... */ |
327 | doupdate(); |
328 | } |
329 | delwin(list); |
330 | delwin(dialog); |
331 | return key; /* ESC pressed */ |
332 | } |
333 |
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