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- /*
- * checklist.c -- implements the checklist box
- *
- * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
- * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
- * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
- * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include "dialog.h"
- static int list_width, check_x, item_x;
- /*
- * Print list item
- */
- static void print_item(WINDOW * win, const char *item, int status, int choice,
- int selected)
- {
- int i;
- /* Clear 'residue' of last item */
- wattrset(win, menubox_attr);
- wmove(win, choice, 0);
- for (i = 0; i < list_width; i++)
- waddch(win, ' ');
- wmove(win, choice, check_x);
- wattrset(win, selected ? check_selected_attr : check_attr);
- wprintw(win, "(%c)", status ? 'X' : ' ');
- wattrset(win, selected ? tag_selected_attr : tag_attr);
- mvwaddch(win, choice, item_x, item[0]);
- wattrset(win, selected ? item_selected_attr : item_attr);
- waddstr(win, (char *)item + 1);
- if (selected) {
- wmove(win, choice, check_x + 1);
- wrefresh(win);
- }
- }
- /*
- * Print the scroll indicators.
- */
- static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
- int y, int x, int height)
- {
- wmove(win, y, x);
- if (scroll > 0) {
- wattrset(win, uarrow_attr);
- waddch(win, ACS_UARROW);
- waddstr(win, "(-)");
- } else {
- wattrset(win, menubox_attr);
- waddch(win, ACS_HLINE);
- waddch(win, ACS_HLINE);
- waddch(win, ACS_HLINE);
- waddch(win, ACS_HLINE);
- }
- y = y + height + 1;
- wmove(win, y, x);
- if ((height < item_no) && (scroll + choice < item_no - 1)) {
- wattrset(win, darrow_attr);
- waddch(win, ACS_DARROW);
- waddstr(win, "(+)");
- } else {
- wattrset(win, menubox_border_attr);
- waddch(win, ACS_HLINE);
- waddch(win, ACS_HLINE);
- waddch(win, ACS_HLINE);
- waddch(win, ACS_HLINE);
- }
- }
- /*
- * Display the termination buttons
- */
- static void print_buttons(WINDOW * dialog, int height, int width, int selected)
- {
- int x = width / 2 - 11;
- int y = height - 2;
- print_button(dialog, "Select", y, x, selected == 0);
- print_button(dialog, " Help ", y, x + 14, selected == 1);
- wmove(dialog, y, x + 1 + 14 * selected);
- wrefresh(dialog);
- }
- /*
- * Display a dialog box with a list of options that can be turned on or off
- * in the style of radiolist (only one option turned on at a time).
- */
- int dialog_checklist(const char *title, const char *prompt, int height,
- int width, int list_height, int item_no,
- const char *const *items)
- {
- int i, x, y, box_x, box_y;
- int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
- WINDOW *dialog, *list;
- /* Allocate space for storing item on/off status */
- if ((status = malloc(sizeof(int) * item_no)) == NULL) {
- endwin();
- fprintf(stderr,
- "\nCan't allocate memory in dialog_checklist().\n");
- exit(-1);
- }
- /* Initializes status */
- for (i = 0; i < item_no; i++) {
- status[i] = !strcasecmp(items[i * 3 + 2], "on");
- if ((!choice && status[i])
- || !strcasecmp(items[i * 3 + 2], "selected"))
- choice = i + 1;
- }
- if (choice)
- choice--;
- max_choice = MIN(list_height, item_no);
- /* center dialog box on screen */
- x = (COLS - width) / 2;
- y = (LINES - height) / 2;
- draw_shadow(stdscr, y, x, height, width);
- dialog = newwin(height, width, y, x);
- keypad(dialog, TRUE);
- draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
- wattrset(dialog, border_attr);
- mvwaddch(dialog, height - 3, 0, ACS_LTEE);
- for (i = 0; i < width - 2; i++)
- waddch(dialog, ACS_HLINE);
- wattrset(dialog, dialog_attr);
- waddch(dialog, ACS_RTEE);
- print_title(dialog, title, width);
- wattrset(dialog, dialog_attr);
- print_autowrap(dialog, prompt, width - 2, 1, 3);
- list_width = width - 6;
- box_y = height - list_height - 5;
- box_x = (width - list_width) / 2 - 1;
- /* create new window for the list */
- list = subwin(dialog, list_height, list_width, y + box_y + 1,
- x + box_x + 1);
- keypad(list, TRUE);
- /* draw a box around the list items */
- draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
- menubox_border_attr, menubox_attr);
- /* Find length of longest item in order to center checklist */
- check_x = 0;
- for (i = 0; i < item_no; i++)
- check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
- check_x = (list_width - check_x) / 2;
- item_x = check_x + 4;
- if (choice >= list_height) {
- scroll = choice - list_height + 1;
- choice -= scroll;
- }
- /* Print the list */
- for (i = 0; i < max_choice; i++) {
- print_item(list, items[(scroll + i) * 3 + 1],
- status[i + scroll], i, i == choice);
- }
- print_arrows(dialog, choice, item_no, scroll,
- box_y, box_x + check_x + 5, list_height);
- print_buttons(dialog, height, width, 0);
- wnoutrefresh(dialog);
- wnoutrefresh(list);
- doupdate();
- while (key != ESC) {
- key = wgetch(dialog);
- for (i = 0; i < max_choice; i++)
- if (toupper(key) ==
- toupper(items[(scroll + i) * 3 + 1][0]))
- break;
- if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
- key == '+' || key == '-') {
- if (key == KEY_UP || key == '-') {
- if (!choice) {
- if (!scroll)
- continue;
- /* Scroll list down */
- if (list_height > 1) {
- /* De-highlight current first item */
- print_item(list, items[scroll * 3 + 1],
- status[scroll], 0, FALSE);
- scrollok(list, TRUE);
- wscrl(list, -1);
- scrollok(list, FALSE);
- }
- scroll--;
- print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
- print_arrows(dialog, choice, item_no,
- scroll, box_y, box_x + check_x + 5, list_height);
- wnoutrefresh(dialog);
- wrefresh(list);
- continue; /* wait for another key press */
- } else
- i = choice - 1;
- } else if (key == KEY_DOWN || key == '+') {
- if (choice == max_choice - 1) {
- if (scroll + choice >= item_no - 1)
- continue;
- /* Scroll list up */
- if (list_height > 1) {
- /* De-highlight current last item before scrolling up */
- print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
- status[scroll + max_choice - 1],
- max_choice - 1, FALSE);
- scrollok(list, TRUE);
- wscrl(list, 1);
- scrollok(list, FALSE);
- }
- scroll++;
- print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
- status[scroll + max_choice - 1], max_choice - 1, TRUE);
- print_arrows(dialog, choice, item_no,
- scroll, box_y, box_x + check_x + 5, list_height);
- wnoutrefresh(dialog);
- wrefresh(list);
- continue; /* wait for another key press */
- } else
- i = choice + 1;
- }
- if (i != choice) {
- /* De-highlight current item */
- print_item(list, items[(scroll + choice) * 3 + 1],
- status[scroll + choice], choice, FALSE);
- /* Highlight new item */
- choice = i;
- print_item(list, items[(scroll + choice) * 3 + 1],
- status[scroll + choice], choice, TRUE);
- wnoutrefresh(dialog);
- wrefresh(list);
- }
- continue; /* wait for another key press */
- }
- switch (key) {
- case 'H':
- case 'h':
- case '?':
- fprintf(stderr, "%s", items[(scroll + choice) * 3]);
- delwin(dialog);
- free(status);
- return 1;
- case TAB:
- case KEY_LEFT:
- case KEY_RIGHT:
- button = ((key == KEY_LEFT ? --button : ++button) < 0)
- ? 1 : (button > 1 ? 0 : button);
- print_buttons(dialog, height, width, button);
- wrefresh(dialog);
- break;
- case 'S':
- case 's':
- case ' ':
- case '\n':
- if (!button) {
- if (!status[scroll + choice]) {
- for (i = 0; i < item_no; i++)
- status[i] = 0;
- status[scroll + choice] = 1;
- for (i = 0; i < max_choice; i++)
- print_item(list, items[(scroll + i) * 3 + 1],
- status[scroll + i], i, i == choice);
- }
- wnoutrefresh(dialog);
- wrefresh(list);
- for (i = 0; i < item_no; i++)
- if (status[i])
- fprintf(stderr, "%s", items[i * 3]);
- } else
- fprintf(stderr, "%s", items[(scroll + choice) * 3]);
- delwin(dialog);
- free(status);
- return button;
- case 'X':
- case 'x':
- key = ESC;
- case ESC:
- break;
- }
- /* Now, update everything... */
- doupdate();
- }
- delwin(dialog);
- free(status);
- return -1; /* ESC pressed */
- }
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