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 */
print_item(WINDOW * win,int choice,int selected)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 */
print_arrows(WINDOW * win,int choice,int item_no,int scroll,int y,int x,int height)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 */
print_buttons(WINDOW * dialog,int height,int width,int selected)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 */
dialog_checklist(const char * title,const char * prompt,int height,int width,int list_height)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 + CHECKLIST_HEIGTH_MIN))
136 return -ERRDISPLAYTOOSMALL;
137 if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
138 return -ERRDISPLAYTOOSMALL;
139
140 max_choice = MIN(list_height, item_count());
141
142 /* center dialog box on screen */
143 x = (getmaxx(stdscr) - width) / 2;
144 y = (getmaxy(stdscr) - 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