checklist.c 8.0 KB

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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. #include "dialog.h"
  24. static int list_width, check_x, item_x;
  25. /*
  26. * Print list item
  27. */
  28. static void print_item(WINDOW * win, int choice, int selected)
  29. {
  30. int i;
  31. /* Clear 'residue' of last item */
  32. wattrset(win, dlg.menubox.atr);
  33. wmove(win, choice, 0);
  34. for (i = 0; i < list_width; i++)
  35. waddch(win, ' ');
  36. wmove(win, choice, check_x);
  37. wattrset(win, selected ? dlg.check_selected.atr
  38. : dlg.check.atr);
  39. wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
  40. wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  41. mvwaddch(win, choice, item_x, item_str()[0]);
  42. wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  43. waddstr(win, (char *)item_str() + 1);
  44. if (selected) {
  45. wmove(win, choice, check_x + 1);
  46. wrefresh(win);
  47. }
  48. }
  49. /*
  50. * Print the scroll indicators.
  51. */
  52. static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  53. int y, int x, int height)
  54. {
  55. wmove(win, y, x);
  56. if (scroll > 0) {
  57. wattrset(win, dlg.uarrow.atr);
  58. waddch(win, ACS_UARROW);
  59. waddstr(win, "(-)");
  60. } else {
  61. wattrset(win, dlg.menubox.atr);
  62. waddch(win, ACS_HLINE);
  63. waddch(win, ACS_HLINE);
  64. waddch(win, ACS_HLINE);
  65. waddch(win, ACS_HLINE);
  66. }
  67. y = y + height + 1;
  68. wmove(win, y, x);
  69. if ((height < item_no) && (scroll + choice < item_no - 1)) {
  70. wattrset(win, dlg.darrow.atr);
  71. waddch(win, ACS_DARROW);
  72. waddstr(win, "(+)");
  73. } else {
  74. wattrset(win, dlg.menubox_border.atr);
  75. waddch(win, ACS_HLINE);
  76. waddch(win, ACS_HLINE);
  77. waddch(win, ACS_HLINE);
  78. waddch(win, ACS_HLINE);
  79. }
  80. }
  81. /*
  82. * Display the termination buttons
  83. */
  84. static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  85. {
  86. int x = width / 2 - 11;
  87. int y = height - 2;
  88. print_button(dialog, "Select", y, x, selected == 0);
  89. print_button(dialog, " Help ", y, x + 14, selected == 1);
  90. wmove(dialog, y, x + 1 + 14 * selected);
  91. wrefresh(dialog);
  92. }
  93. /*
  94. * Display a dialog box with a list of options that can be turned on or off
  95. * in the style of radiolist (only one option turned on at a time).
  96. */
  97. int dialog_checklist(const char *title, const char *prompt, int height,
  98. int width, int list_height)
  99. {
  100. int i, x, y, box_x, box_y;
  101. int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
  102. WINDOW *dialog, *list;
  103. /* which item to highlight */
  104. item_foreach() {
  105. if (item_is_tag('X'))
  106. choice = item_n();
  107. if (item_is_selected()) {
  108. choice = item_n();
  109. break;
  110. }
  111. }
  112. do_resize:
  113. if (getmaxy(stdscr) < (height + 6))
  114. return -ERRDISPLAYTOOSMALL;
  115. if (getmaxx(stdscr) < (width + 6))
  116. return -ERRDISPLAYTOOSMALL;
  117. max_choice = MIN(list_height, item_count());
  118. /* center dialog box on screen */
  119. x = (COLS - width) / 2;
  120. y = (LINES - height) / 2;
  121. draw_shadow(stdscr, y, x, height, width);
  122. dialog = newwin(height, width, y, x);
  123. keypad(dialog, TRUE);
  124. draw_box(dialog, 0, 0, height, width,
  125. dlg.dialog.atr, dlg.border.atr);
  126. wattrset(dialog, dlg.border.atr);
  127. mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  128. for (i = 0; i < width - 2; i++)
  129. waddch(dialog, ACS_HLINE);
  130. wattrset(dialog, dlg.dialog.atr);
  131. waddch(dialog, ACS_RTEE);
  132. print_title(dialog, title, width);
  133. wattrset(dialog, dlg.dialog.atr);
  134. print_autowrap(dialog, prompt, width - 2, 1, 3);
  135. list_width = width - 6;
  136. box_y = height - list_height - 5;
  137. box_x = (width - list_width) / 2 - 1;
  138. /* create new window for the list */
  139. list = subwin(dialog, list_height, list_width, y + box_y + 1,
  140. x + box_x + 1);
  141. keypad(list, TRUE);
  142. /* draw a box around the list items */
  143. draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
  144. dlg.menubox_border.atr, dlg.menubox.atr);
  145. /* Find length of longest item in order to center checklist */
  146. check_x = 0;
  147. item_foreach()
  148. check_x = MAX(check_x, strlen(item_str()) + 4);
  149. check_x = (list_width - check_x) / 2;
  150. item_x = check_x + 4;
  151. if (choice >= list_height) {
  152. scroll = choice - list_height + 1;
  153. choice -= scroll;
  154. }
  155. /* Print the list */
  156. for (i = 0; i < max_choice; i++) {
  157. item_set(scroll + i);
  158. print_item(list, i, i == choice);
  159. }
  160. print_arrows(dialog, choice, item_count(), scroll,
  161. box_y, box_x + check_x + 5, list_height);
  162. print_buttons(dialog, height, width, 0);
  163. wnoutrefresh(dialog);
  164. wnoutrefresh(list);
  165. doupdate();
  166. while (key != KEY_ESC) {
  167. key = wgetch(dialog);
  168. for (i = 0; i < max_choice; i++) {
  169. item_set(i + scroll);
  170. if (toupper(key) == toupper(item_str()[0]))
  171. break;
  172. }
  173. if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
  174. key == '+' || key == '-') {
  175. if (key == KEY_UP || key == '-') {
  176. if (!choice) {
  177. if (!scroll)
  178. continue;
  179. /* Scroll list down */
  180. if (list_height > 1) {
  181. /* De-highlight current first item */
  182. item_set(scroll);
  183. print_item(list, 0, FALSE);
  184. scrollok(list, TRUE);
  185. wscrl(list, -1);
  186. scrollok(list, FALSE);
  187. }
  188. scroll--;
  189. item_set(scroll);
  190. print_item(list, 0, TRUE);
  191. print_arrows(dialog, choice, item_count(),
  192. scroll, box_y, box_x + check_x + 5, list_height);
  193. wnoutrefresh(dialog);
  194. wrefresh(list);
  195. continue; /* wait for another key press */
  196. } else
  197. i = choice - 1;
  198. } else if (key == KEY_DOWN || key == '+') {
  199. if (choice == max_choice - 1) {
  200. if (scroll + choice >= item_count() - 1)
  201. continue;
  202. /* Scroll list up */
  203. if (list_height > 1) {
  204. /* De-highlight current last item before scrolling up */
  205. item_set(scroll + max_choice - 1);
  206. print_item(list,
  207. max_choice - 1,
  208. FALSE);
  209. scrollok(list, TRUE);
  210. wscrl(list, 1);
  211. scrollok(list, FALSE);
  212. }
  213. scroll++;
  214. item_set(scroll + max_choice - 1);
  215. print_item(list, max_choice - 1, TRUE);
  216. print_arrows(dialog, choice, item_count(),
  217. scroll, box_y, box_x + check_x + 5, list_height);
  218. wnoutrefresh(dialog);
  219. wrefresh(list);
  220. continue; /* wait for another key press */
  221. } else
  222. i = choice + 1;
  223. }
  224. if (i != choice) {
  225. /* De-highlight current item */
  226. item_set(scroll + choice);
  227. print_item(list, choice, FALSE);
  228. /* Highlight new item */
  229. choice = i;
  230. item_set(scroll + choice);
  231. print_item(list, choice, TRUE);
  232. wnoutrefresh(dialog);
  233. wrefresh(list);
  234. }
  235. continue; /* wait for another key press */
  236. }
  237. switch (key) {
  238. case 'H':
  239. case 'h':
  240. case '?':
  241. button = 1;
  242. /* fall-through */
  243. case 'S':
  244. case 's':
  245. case ' ':
  246. case '\n':
  247. item_foreach()
  248. item_set_selected(0);
  249. item_set(scroll + choice);
  250. item_set_selected(1);
  251. delwin(list);
  252. delwin(dialog);
  253. return button;
  254. case TAB:
  255. case KEY_LEFT:
  256. case KEY_RIGHT:
  257. button = ((key == KEY_LEFT ? --button : ++button) < 0)
  258. ? 1 : (button > 1 ? 0 : button);
  259. print_buttons(dialog, height, width, button);
  260. wrefresh(dialog);
  261. break;
  262. case 'X':
  263. case 'x':
  264. key = KEY_ESC;
  265. break;
  266. case KEY_ESC:
  267. key = on_key_esc(dialog);
  268. break;
  269. case KEY_RESIZE:
  270. delwin(list);
  271. delwin(dialog);
  272. on_key_resize();
  273. goto do_resize;
  274. }
  275. /* Now, update everything... */
  276. doupdate();
  277. }
  278. delwin(list);
  279. delwin(dialog);
  280. return key; /* ESC pressed */
  281. }