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 35 /* Clear 'residue' of last item */ 36 wattrset(win, dlg.menubox.atr); 37 wmove(win, choice, 0); 38 for (i = 0; i < list_width; i++) 39 waddch(win, ' '); 40 41 wmove(win, choice, check_x); 42 wattrset(win, selected ? dlg.check_selected.atr 43 : dlg.check.atr); 44 if (!item_is_tag(':')) 45 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' '); 46 47 wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr); 48 mvwaddch(win, choice, item_x, item_str()[0]); 49 wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr); 50 waddstr(win, (char *)item_str() + 1); 51 if (selected) { 52 wmove(win, choice, check_x + 1); 53 wrefresh(win); 54 } 55 } 56 57 /* 58 * Print the scroll indicators. 59 */ 60 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll, 61 int y, int x, int height) 62 { 63 wmove(win, y, x); 64 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 77 y = y + height + 1; 78 wmove(win, y, x); 79 80 if ((height < item_no) && (scroll + choice < item_no - 1)) { 81 wattrset(win, dlg.darrow.atr); 82 waddch(win, ACS_DARROW); 83 waddstr(win, "(+)"); 84 } else { 85 wattrset(win, dlg.menubox_border.atr); 86 waddch(win, ACS_HLINE); 87 waddch(win, ACS_HLINE); 88 waddch(win, ACS_HLINE); 89 waddch(win, ACS_HLINE); 90 } 91 } 92 93 /* 94 * Display the termination buttons 95 */ 96 static void print_buttons(WINDOW * dialog, int height, int width, int selected) 97 { 98 int x = width / 2 - 11; 99 int y = height - 2; 100 101 print_button(dialog, gettext("Select"), y, x, selected == 0); 102 print_button(dialog, gettext(" Help "), y, x + 14, selected == 1); 103 104 wmove(dialog, y, x + 1 + 14 * selected); 105 wrefresh(dialog); 106 } 107 108 /* 109 * Display a dialog box with a list of options that can be turned on or off 110 * in the style of radiolist (only one option turned on at a time). 111 */ 112 int dialog_checklist(const char *title, const char *prompt, int height, 113 int width, int list_height) 114 { 115 int i, x, y, box_x, box_y; 116 int key = 0, button = 0, choice = 0, scroll = 0, max_choice; 117 WINDOW *dialog, *list; 118 119 /* which item to highlight */ 120 item_foreach() { 121 if (item_is_tag('X')) 122 choice = item_n(); 123 if (item_is_selected()) { 124 choice = item_n(); 125 break; 126 } 127 } 128 129 do_resize: 130 if (getmaxy(stdscr) < (height + 6)) 131 return -ERRDISPLAYTOOSMALL; 132 if (getmaxx(stdscr) < (width + 6)) 133 return -ERRDISPLAYTOOSMALL; 134 135 max_choice = MIN(list_height, item_count()); 136 137 /* center dialog box on screen */ 138 x = (COLS - width) / 2; 139 y = (LINES - height) / 2; 140 141 draw_shadow(stdscr, y, x, height, width); 142 143 dialog = newwin(height, width, y, x); 144 keypad(dialog, TRUE); 145 146 draw_box(dialog, 0, 0, height, width, 147 dlg.dialog.atr, dlg.border.atr); 148 wattrset(dialog, dlg.border.atr); 149 mvwaddch(dialog, height - 3, 0, ACS_LTEE); 150 for (i = 0; i < width - 2; i++) 151 waddch(dialog, ACS_HLINE); 152 wattrset(dialog, dlg.dialog.atr); 153 waddch(dialog, ACS_RTEE); 154 155 print_title(dialog, title, width); 156 157 wattrset(dialog, dlg.dialog.atr); 158 print_autowrap(dialog, prompt, width - 2, 1, 3); 159 160 list_width = width - 6; 161 box_y = height - list_height - 5; 162 box_x = (width - list_width) / 2 - 1; 163 164 /* create new window for the list */ 165 list = subwin(dialog, list_height, list_width, y + box_y + 1, 166 x + box_x + 1); 167 168 keypad(list, TRUE); 169 170 /* draw a box around the list items */ 171 draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, 172 dlg.menubox_border.atr, dlg.menubox.atr); 173 174 /* Find length of longest item in order to center checklist */ 175 check_x = 0; 176 item_foreach() 177 check_x = MAX(check_x, strlen(item_str()) + 4); 178 179 check_x = (list_width - check_x) / 2; 180 item_x = check_x + 4; 181 182 if (choice >= list_height) { 183 scroll = choice - list_height + 1; 184 choice -= scroll; 185 } 186 187 /* Print the list */ 188 for (i = 0; i < max_choice; i++) { 189 item_set(scroll + i); 190 print_item(list, i, i == choice); 191 } 192 193 print_arrows(dialog, choice, item_count(), scroll, 194 box_y, box_x + check_x + 5, list_height); 195 196 print_buttons(dialog, height, width, 0); 197 198 wnoutrefresh(dialog); 199 wnoutrefresh(list); 200 doupdate(); 201 202 while (key != KEY_ESC) { 203 key = wgetch(dialog); 204 205 for (i = 0; i < max_choice; i++) { 206 item_set(i + scroll); 207 if (toupper(key) == toupper(item_str()[0])) 208 break; 209 } 210 211 if (i < max_choice || key == KEY_UP || key == KEY_DOWN || 212 key == '+' || key == '-') { 213 if (key == KEY_UP || key == '-') { 214 if (!choice) { 215 if (!scroll) 216 continue; 217 /* Scroll list down */ 218 if (list_height > 1) { 219 /* De-highlight current first item */ 220 item_set(scroll); 221 print_item(list, 0, FALSE); 222 scrollok(list, TRUE); 223 wscrl(list, -1); 224 scrollok(list, FALSE); 225 } 226 scroll--; 227 item_set(scroll); 228 print_item(list, 0, TRUE); 229 print_arrows(dialog, choice, item_count(), 230 scroll, box_y, box_x + check_x + 5, list_height); 231 232 wnoutrefresh(dialog); 233 wrefresh(list); 234 235 continue; /* wait for another key press */ 236 } else 237 i = choice - 1; 238 } else if (key == KEY_DOWN || key == '+') { 239 if (choice == max_choice - 1) { 240 if (scroll + choice >= item_count() - 1) 241 continue; 242 /* Scroll list up */ 243 if (list_height > 1) { 244 /* De-highlight current last item before scrolling up */ 245 item_set(scroll + max_choice - 1); 246 print_item(list, 247 max_choice - 1, 248 FALSE); 249 scrollok(list, TRUE); 250 wscrl(list, 1); 251 scrollok(list, FALSE); 252 } 253 scroll++; 254 item_set(scroll + max_choice - 1); 255 print_item(list, max_choice - 1, TRUE); 256 257 print_arrows(dialog, choice, item_count(), 258 scroll, box_y, box_x + check_x + 5, list_height); 259 260 wnoutrefresh(dialog); 261 wrefresh(list); 262 263 continue; /* wait for another key press */ 264 } else 265 i = choice + 1; 266 } 267 if (i != choice) { 268 /* De-highlight current item */ 269 item_set(scroll + choice); 270 print_item(list, choice, FALSE); 271 /* Highlight new item */ 272 choice = i; 273 item_set(scroll + choice); 274 print_item(list, choice, TRUE); 275 wnoutrefresh(dialog); 276 wrefresh(list); 277 } 278 continue; /* wait for another key press */ 279 } 280 switch (key) { 281 case 'H': 282 case 'h': 283 case '?': 284 button = 1; 285 /* fall-through */ 286 case 'S': 287 case 's': 288 case ' ': 289 case '\n': 290 item_foreach() 291 item_set_selected(0); 292 item_set(scroll + choice); 293 item_set_selected(1); 294 delwin(list); 295 delwin(dialog); 296 return button; 297 case TAB: 298 case KEY_LEFT: 299 case KEY_RIGHT: 300 button = ((key == KEY_LEFT ? --button : ++button) < 0) 301 ? 1 : (button > 1 ? 0 : button); 302 303 print_buttons(dialog, height, width, button); 304 wrefresh(dialog); 305 break; 306 case 'X': 307 case 'x': 308 key = KEY_ESC; 309 break; 310 case KEY_ESC: 311 key = on_key_esc(dialog); 312 break; 313 case KEY_RESIZE: 314 delwin(list); 315 delwin(dialog); 316 on_key_resize(); 317 goto do_resize; 318 } 319 320 /* Now, update everything... */ 321 doupdate(); 322 } 323 delwin(list); 324 delwin(dialog); 325 return key; /* ESC pressed */ 326 } 327