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, "Select", y, x, selected == 0); 107 print_button(dialog, " 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 + 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