1 /* 2 * checklist.c -- implements the checklist box 3 * 4 * ORIGINAL AUTHOR: Savio Lam (lam836 (at) cs.cuhk.hk) 5 * Stuart Herbert - S.Herbert (at) sheffield.ac.uk: radiolist extension 6 * Alessandro Rubini - rubini (at) ipvvis.unipv.it: merged the two 7 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap (at) 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 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' '); 45 46 wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr); 47 mvwaddch(win, choice, item_x, item_str()[0]); 48 wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr); 49 waddstr(win, (char *)item_str() + 1); 50 if (selected) { 51 wmove(win, choice, check_x + 1); 52 wrefresh(win); 53 } 54 } 55 56 /* 57 * Print the scroll indicators. 58 */ 59 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll, 60 int y, int x, int height) 61 { 62 wmove(win, y, x); 63 64 if (scroll > 0) { 65 wattrset(win, dlg.uarrow.atr); 66 waddch(win, ACS_UARROW); 67 waddstr(win, "(-)"); 68 } else { 69 wattrset(win, dlg.menubox.atr); 70 waddch(win, ACS_HLINE); 71 waddch(win, ACS_HLINE); 72 waddch(win, ACS_HLINE); 73 waddch(win, ACS_HLINE); 74 } 75 76 y = y + height + 1; 77 wmove(win, y, x); 78 79 if ((height < item_no) && (scroll + choice < item_no - 1)) { 80 wattrset(win, dlg.darrow.atr); 81 waddch(win, ACS_DARROW); 82 waddstr(win, "(+)"); 83 } else { 84 wattrset(win, dlg.menubox_border.atr); 85 waddch(win, ACS_HLINE); 86 waddch(win, ACS_HLINE); 87 waddch(win, ACS_HLINE); 88 waddch(win, ACS_HLINE); 89 } 90 } 91 92 /* 93 * Display the termination buttons 94 */ 95 static void print_buttons(WINDOW * dialog, int height, int width, int selected) 96 { 97 int x = width / 2 - 11; 98 int y = height - 2; 99 100 print_button(dialog, "Select", y, x, selected == 0); 101 print_button(dialog, " Help ", y, x + 14, selected == 1); 102 103 wmove(dialog, y, x + 1 + 14 * selected); 104 wrefresh(dialog); 105 } 106 107 /* 108 * Display a dialog box with a list of options that can be turned on or off 109 * in the style of radiolist (only one option turned on at a time). 110 */ 111 int dialog_checklist(const char *title, const char *prompt, int height, 112 int width, int list_height) 113 { 114 int i, x, y, box_x, box_y; 115 int key = 0, button = 0, choice = 0, scroll = 0, max_choice; 116 WINDOW *dialog, *list; 117 118 /* which item to highlight */ 119 item_foreach() { 120 if (item_is_tag('X')) 121 choice = item_n(); 122 if (item_is_selected()) { 123 choice = item_n(); 124 break; 125 } 126 } 127 128 do_resize: 129 if (getmaxy(stdscr) < (height + 6)) 130 return -ERRDISPLAYTOOSMALL; 131 if (getmaxx(stdscr) < (width + 6)) 132 return -ERRDISPLAYTOOSMALL; 133 134 max_choice = MIN(list_height, item_count()); 135 136 /* center dialog box on screen */ 137 x = (COLS - width) / 2; 138 y = (LINES - height) / 2; 139 140 draw_shadow(stdscr, y, x, height, width); 141 142 dialog = newwin(height, width, y, x); 143 keypad(dialog, TRUE); 144 145 draw_box(dialog, 0, 0, height, width, 146 dlg.dialog.atr, dlg.border.atr); 147 wattrset(dialog, dlg.border.atr); 148 mvwaddch(dialog, height - 3, 0, ACS_LTEE); 149 for (i = 0; i < width - 2; i++) 150 waddch(dialog, ACS_HLINE); 151 wattrset(dialog, dlg.dialog.atr); 152 waddch(dialog, ACS_RTEE); 153 154 print_title(dialog, title, width); 155 156 wattrset(dialog, dlg.dialog.atr); 157 print_autowrap(dialog, prompt, width - 2, 1, 3); 158 159 list_width = width - 6; 160 box_y = height - list_height - 5; 161 box_x = (width - list_width) / 2 - 1; 162 163 /* create new window for the list */ 164 list = subwin(dialog, list_height, list_width, y + box_y + 1, 165 x + box_x + 1); 166 167 keypad(list, TRUE); 168 169 /* draw a box around the list items */ 170 draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, 171 dlg.menubox_border.atr, dlg.menubox.atr); 172 173 /* Find length of longest item in order to center checklist */ 174 check_x = 0; 175 item_foreach() 176 check_x = MAX(check_x, strlen(item_str()) + 4); 177 178 check_x = (list_width - check_x) / 2; 179 item_x = check_x + 4; 180 181 if (choice >= list_height) { 182 scroll = choice - list_height + 1; 183 choice -= scroll; 184 } 185 186 /* Print the list */ 187 for (i = 0; i < max_choice; i++) { 188 item_set(scroll + i); 189 print_item(list, i, i == choice); 190 } 191 192 print_arrows(dialog, choice, item_count(), scroll, 193 box_y, box_x + check_x + 5, list_height); 194 195 print_buttons(dialog, height, width, 0); 196 197 wnoutrefresh(dialog); 198 wnoutrefresh(list); 199 doupdate(); 200 201 while (key != KEY_ESC) { 202 key = wgetch(dialog); 203 204 for (i = 0; i < max_choice; i++) { 205 item_set(i + scroll); 206 if (toupper(key) == toupper(item_str()[0])) 207 break; 208 } 209 210 if (i < max_choice || key == KEY_UP || key == KEY_DOWN || 211 key == '+' || key == '-') { 212 if (key == KEY_UP || key == '-') { 213 if (!choice) { 214 if (!scroll) 215 continue; 216 /* Scroll list down */ 217 if (list_height > 1) { 218 /* De-highlight current first item */ 219 item_set(scroll); 220 print_item(list, 0, FALSE); 221 scrollok(list, TRUE); 222 wscrl(list, -1); 223 scrollok(list, FALSE); 224 } 225 scroll--; 226 item_set(scroll); 227 print_item(list, 0, TRUE); 228 print_arrows(dialog, choice, item_count(), 229 scroll, box_y, box_x + check_x + 5, list_height); 230 231 wnoutrefresh(dialog); 232 wrefresh(list); 233 234 continue; /* wait for another key press */ 235 } else 236 i = choice - 1; 237 } else if (key == KEY_DOWN || key == '+') { 238 if (choice == max_choice - 1) { 239 if (scroll + choice >= item_count() - 1) 240 continue; 241 /* Scroll list up */ 242 if (list_height > 1) { 243 /* De-highlight current last item before scrolling up */ 244 item_set(scroll + max_choice - 1); 245 print_item(list, 246 max_choice - 1, 247 FALSE); 248 scrollok(list, TRUE); 249 wscrl(list, 1); 250 scrollok(list, FALSE); 251 } 252 scroll++; 253 item_set(scroll + max_choice - 1); 254 print_item(list, max_choice - 1, TRUE); 255 256 print_arrows(dialog, choice, item_count(), 257 scroll, box_y, box_x + check_x + 5, list_height); 258 259 wnoutrefresh(dialog); 260 wrefresh(list); 261 262 continue; /* wait for another key press */ 263 } else 264 i = choice + 1; 265 } 266 if (i != choice) { 267 /* De-highlight current item */ 268 item_set(scroll + choice); 269 print_item(list, choice, FALSE); 270 /* Highlight new item */ 271 choice = i; 272 item_set(scroll + choice); 273 print_item(list, choice, TRUE); 274 wnoutrefresh(dialog); 275 wrefresh(list); 276 } 277 continue; /* wait for another key press */ 278 } 279 switch (key) { 280 case 'H': 281 case 'h': 282 case '?': 283 button = 1; 284 /* fall-through */ 285 case 'S': 286 case 's': 287 case ' ': 288 case '\n': 289 item_foreach() 290 item_set_selected(0); 291 item_set(scroll + choice); 292 item_set_selected(1); 293 delwin(list); 294 delwin(dialog); 295 return button; 296 case TAB: 297 case KEY_LEFT: 298 case KEY_RIGHT: 299 button = ((key == KEY_LEFT ? --button : ++button) < 0) 300 ? 1 : (button > 1 ? 0 : button); 301 302 print_buttons(dialog, height, width, button); 303 wrefresh(dialog); 304 break; 305 case 'X': 306 case 'x': 307 key = KEY_ESC; 308 break; 309 case KEY_ESC: 310 key = on_key_esc(dialog); 311 break; 312 case KEY_RESIZE: 313 delwin(list); 314 delwin(dialog); 315 on_key_resize(); 316 goto do_resize; 317 } 318 319 /* Now, update everything... */ 320 doupdate(); 321 } 322 delwin(list); 323 delwin(dialog); 324 return key; /* ESC pressed */ 325 } 326
