checkbox.c 8.5 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. #include "app_dialogs.h"
  25. #define LOG_LEVEL 2
  26. #define LOG_PREFIX "camera_demo3"
  27. #include <syslog.h>
  28. static int list_width, check_x, item_x;
  29. /*
  30. * Print list item
  31. */
  32. static void print_item(WINDOW * win, int choice, int selected)
  33. {
  34. int i;
  35. char *list_item = malloc(list_width + 1);
  36. strncpy(list_item, item_str(), list_width - item_x);
  37. list_item[list_width - item_x] = '\0';
  38. /* Clear 'residue' of last item */
  39. wattrset(win, dlg.menubox.atr);
  40. wmove(win, choice, 0);
  41. for (i = 0; i < list_width; i++)
  42. waddch(win, ' ');
  43. wmove(win, choice, check_x);
  44. wattrset(win, selected ? dlg.check_selected.atr
  45. : dlg.check.atr);
  46. if (!item_is_tag(':'))
  47. wprintw(win, "[%c]", item_is_tag('*') ? '*' : ' ');
  48. wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
  49. mvwaddch(win, choice, item_x, list_item[0]);
  50. wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
  51. waddstr(win, list_item + 1);
  52. if (selected) {
  53. wmove(win, choice, check_x + 1);
  54. wrefresh(win);
  55. }
  56. free(list_item);
  57. }
  58. /*
  59. * Print the scroll indicators.
  60. */
  61. static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
  62. int y, int x, int height)
  63. {
  64. wmove(win, y, x);
  65. if (scroll > 0) {
  66. wattrset(win, dlg.uarrow.atr);
  67. waddch(win, ACS_UARROW);
  68. waddstr(win, "[-]");
  69. } else {
  70. wattrset(win, dlg.menubox.atr);
  71. waddch(win, ACS_HLINE);
  72. waddch(win, ACS_HLINE);
  73. waddch(win, ACS_HLINE);
  74. waddch(win, ACS_HLINE);
  75. }
  76. y = y + height + 1;
  77. wmove(win, y, x);
  78. if ((height < item_no) && (scroll + choice < item_no - 1)) {
  79. wattrset(win, dlg.darrow.atr);
  80. waddch(win, ACS_DARROW);
  81. waddstr(win, "[+]");
  82. } else {
  83. wattrset(win, dlg.menubox_border.atr);
  84. waddch(win, ACS_HLINE);
  85. waddch(win, ACS_HLINE);
  86. waddch(win, ACS_HLINE);
  87. waddch(win, ACS_HLINE);
  88. }
  89. }
  90. /*
  91. * Display the termination buttons
  92. */
  93. static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  94. {
  95. int x = width / 2 - 11;
  96. int y = height - 2;
  97. print_button(dialog, gettext("Select"), y, x - 7, selected == 0);
  98. print_button(dialog, gettext("Return"), y, x + 7, selected == 1);
  99. print_button(dialog, gettext(" Help "), y, x + 21, selected == 2);
  100. wmove(dialog, y, x - 7 + 1 + 14 * selected);
  101. wrefresh(dialog);
  102. }
  103. /*
  104. * Display a dialog box with a list of options that can be turned on or off
  105. * in the style of radiolist (only one option turned on at a time).
  106. */
  107. int dialog_checkbox(const char *title, const char *prompt, int height,
  108. int width, int list_height, int init_choice)
  109. {
  110. int i, x, y, box_x, box_y;
  111. int key = 0, button = 0, choice = init_choice, scroll = 0, max_choice;
  112. WINDOW *dialog, *list;
  113. do_resize:
  114. if (WIN_ROWS < (height + CHECKLIST_HEIGTH_MIN)) {
  115. LOG_E("WIN_ROWS(%d) < (height(%d) + CHECKLIST_HEIGTH_MIN(%d)\n",
  116. WIN_ROWS, height, CHECKLIST_HEIGTH_MIN);
  117. return -ERRDISPLAYTOOSMALL;
  118. }
  119. if (WIN_COLS < (width + CHECKLIST_WIDTH_MIN)) {
  120. LOG_E("WIN_COLS(%d) < (width(%d) + CHECKLIST_WIDTH_MIN(%d)\n",
  121. WIN_COLS, width, CHECKLIST_WIDTH_MIN);
  122. return -ERRDISPLAYTOOSMALL;
  123. }
  124. max_choice = MIN(list_height, item_count());
  125. /* center dialog box on screen */
  126. x = (WIN_COLS - width) / 2;
  127. y = (WIN_ROWS - height) / 2;
  128. draw_shadow(stdscr, y, x, height, width);
  129. dialog = newwin(height, width, y, x);
  130. keypad(dialog, TRUE);
  131. draw_box(dialog, 0, 0, height, width,
  132. dlg.dialog.atr, dlg.border.atr);
  133. wattrset(dialog, dlg.border.atr);
  134. mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  135. for (i = 0; i < width - 2; i++)
  136. waddch(dialog, ACS_HLINE);
  137. wattrset(dialog, dlg.dialog.atr);
  138. waddch(dialog, ACS_RTEE);
  139. print_title(dialog, title, width);
  140. wattrset(dialog, dlg.dialog.atr);
  141. print_autowrap(dialog, prompt, width - 2, 1, 3);
  142. list_width = width - 6;
  143. box_y = height - list_height - 5;
  144. box_x = (width - list_width) / 2 - 1;
  145. /* create new window for the list */
  146. list = subwin(dialog, list_height, list_width, y + box_y + 1,
  147. x + box_x + 1);
  148. keypad(list, TRUE);
  149. /* draw a box around the list items */
  150. draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
  151. dlg.menubox_border.atr, dlg.menubox.atr);
  152. /* Find length of longest item in order to center checklist */
  153. check_x = 0;
  154. item_foreach()
  155. check_x = MAX(check_x, strlen(item_str()) + 4);
  156. check_x = MIN(check_x, list_width);
  157. check_x = (list_width - check_x) / 2 - 4;
  158. item_x = check_x + 4;
  159. if (choice >= list_height) {
  160. scroll = choice - list_height + 1;
  161. choice -= scroll;
  162. }
  163. /* Print the list */
  164. for (i = 0; i < max_choice; i++) {
  165. item_set(scroll + i);
  166. print_item(list, i, i == choice);
  167. }
  168. print_arrows(dialog, choice, item_count(), scroll,
  169. box_y, box_x + check_x + 5, list_height);
  170. print_buttons(dialog, height, width, 0);
  171. wnoutrefresh(dialog);
  172. wnoutrefresh(list);
  173. doupdate();
  174. while (key != KEY_ESC) {
  175. key = wgetch(dialog);
  176. for (i = 0; i < max_choice; i++) {
  177. item_set(i + scroll);
  178. if (toupper(key) == toupper(item_str()[0]))
  179. break;
  180. }
  181. if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
  182. key == '+' || key == '-') {
  183. if (key == KEY_UP || key == '-') {
  184. if (!choice) {
  185. if (!scroll)
  186. continue;
  187. /* Scroll list down */
  188. if (list_height > 1) {
  189. /* De-highlight current first item */
  190. item_set(scroll);
  191. print_item(list, 0, FALSE);
  192. scrollok(list, TRUE);
  193. wscrl(list, -1);
  194. scrollok(list, FALSE);
  195. }
  196. scroll--;
  197. item_set(scroll);
  198. print_item(list, 0, TRUE);
  199. print_arrows(dialog, choice, item_count(),
  200. scroll, box_y, box_x + check_x + 5, list_height);
  201. wnoutrefresh(dialog);
  202. wrefresh(list);
  203. continue; /* wait for another key press */
  204. } else
  205. i = choice - 1;
  206. } else if (key == KEY_DOWN || key == '+') {
  207. if (choice == max_choice - 1) {
  208. if (scroll + choice >= item_count() - 1)
  209. continue;
  210. /* Scroll list up */
  211. if (list_height > 1) {
  212. /* De-highlight current last item before scrolling up */
  213. item_set(scroll + max_choice - 1);
  214. print_item(list,
  215. max_choice - 1,
  216. FALSE);
  217. scrollok(list, TRUE);
  218. wscrl(list, 1);
  219. scrollok(list, FALSE);
  220. }
  221. scroll++;
  222. item_set(scroll + max_choice - 1);
  223. print_item(list, max_choice - 1, TRUE);
  224. print_arrows(dialog, choice, item_count(),
  225. scroll, box_y, box_x + check_x + 5, list_height);
  226. wnoutrefresh(dialog);
  227. wrefresh(list);
  228. continue; /* wait for another key press */
  229. } else
  230. i = choice + 1;
  231. }
  232. if (i != choice) {
  233. /* De-highlight current item */
  234. item_set(scroll + choice);
  235. print_item(list, choice, FALSE);
  236. /* Highlight new item */
  237. choice = i;
  238. item_set(scroll + choice);
  239. print_item(list, choice, TRUE);
  240. wnoutrefresh(dialog);
  241. wrefresh(list);
  242. }
  243. continue; /* wait for another key press */
  244. }
  245. switch (key) {
  246. case 'H':
  247. case 'h':
  248. button = 1;
  249. /* fall-through */
  250. case 'S':
  251. case 's':
  252. case ' ':
  253. case '\n':
  254. item_set(scroll + choice);
  255. if (item_is_selected()) {
  256. item_set_selected(0);
  257. }
  258. else {
  259. item_set_selected(1);
  260. }
  261. delwin(list);
  262. delwin(dialog);
  263. return button;
  264. case TAB:
  265. case KEY_LEFT:
  266. case KEY_RIGHT:
  267. button = ((key == KEY_LEFT ? --button : ++button) < 0)
  268. ? 2 : (button > 2 ? 0 : button);
  269. print_buttons(dialog, height, width, button);
  270. wrefresh(dialog);
  271. break;
  272. case 'X':
  273. case 'x':
  274. key = KEY_ESC;
  275. break;
  276. case KEY_ESC:
  277. key = on_key_esc(dialog);
  278. break;
  279. case KEY_RESIZE:
  280. delwin(list);
  281. delwin(dialog);
  282. on_key_resize();
  283. goto do_resize;
  284. }
  285. /* Now, update everything... */
  286. doupdate();
  287. }
  288. delwin(list);
  289. delwin(dialog);
  290. return key; /* ESC pressed */
  291. }