333 lines
8.2 KiB
C
333 lines
8.2 KiB
C
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/*
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* checklist.c -- implements the checklist box
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*
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* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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* Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
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* Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
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* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "dialog.h"
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static int list_width, check_x, item_x;
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/*
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* Print list item
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*/
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static void print_item(WINDOW * win, int choice, int selected)
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{
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int i;
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char *list_item = malloc(list_width + 1);
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strncpy(list_item, item_str(), list_width - item_x);
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list_item[list_width - item_x] = '\0';
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/* Clear 'residue' of last item */
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wattrset(win, dlg.menubox.atr);
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wmove(win, choice, 0);
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for (i = 0; i < list_width; i++)
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waddch(win, ' ');
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wmove(win, choice, check_x);
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wattrset(win, selected ? dlg.check_selected.atr
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: dlg.check.atr);
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if (!item_is_tag(':'))
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wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
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wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
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mvwaddch(win, choice, item_x, list_item[0]);
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wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
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waddstr(win, list_item + 1);
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if (selected) {
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wmove(win, choice, check_x + 1);
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wrefresh(win);
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}
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free(list_item);
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}
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/*
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* Print the scroll indicators.
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*/
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static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
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int y, int x, int height)
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{
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wmove(win, y, x);
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if (scroll > 0) {
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wattrset(win, dlg.uarrow.atr);
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waddch(win, ACS_UARROW);
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waddstr(win, "(-)");
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} else {
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wattrset(win, dlg.menubox.atr);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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}
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y = y + height + 1;
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wmove(win, y, x);
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if ((height < item_no) && (scroll + choice < item_no - 1)) {
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wattrset(win, dlg.darrow.atr);
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waddch(win, ACS_DARROW);
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waddstr(win, "(+)");
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} else {
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wattrset(win, dlg.menubox_border.atr);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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}
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}
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/*
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* Display the termination buttons
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*/
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static void print_buttons(WINDOW * dialog, int height, int width, int selected)
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{
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int x = width / 2 - 11;
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int y = height - 2;
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print_button(dialog, gettext("Select"), y, x, selected == 0);
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print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
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wmove(dialog, y, x + 1 + 14 * selected);
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wrefresh(dialog);
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}
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/*
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* Display a dialog box with a list of options that can be turned on or off
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* in the style of radiolist (only one option turned on at a time).
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*/
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int dialog_checklist(const char *title, const char *prompt, int height,
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int width, int list_height)
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{
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int i, x, y, box_x, box_y;
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int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
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WINDOW *dialog, *list;
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/* which item to highlight */
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item_foreach() {
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if (item_is_tag('X'))
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choice = item_n();
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if (item_is_selected()) {
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choice = item_n();
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break;
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}
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}
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do_resize:
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if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
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return -ERRDISPLAYTOOSMALL;
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if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
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return -ERRDISPLAYTOOSMALL;
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max_choice = MIN(list_height, item_count());
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/* center dialog box on screen */
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x = (getmaxx(stdscr) - width) / 2;
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y = (getmaxy(stdscr) - height) / 2;
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draw_shadow(stdscr, y, x, height, width);
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dialog = newwin(height, width, y, x);
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width,
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dlg.dialog.atr, dlg.border.atr);
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wattrset(dialog, dlg.border.atr);
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mvwaddch(dialog, height - 3, 0, ACS_LTEE);
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for (i = 0; i < width - 2; i++)
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waddch(dialog, ACS_HLINE);
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wattrset(dialog, dlg.dialog.atr);
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waddch(dialog, ACS_RTEE);
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print_title(dialog, title, width);
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wattrset(dialog, dlg.dialog.atr);
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print_autowrap(dialog, prompt, width - 2, 1, 3);
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list_width = width - 6;
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box_y = height - list_height - 5;
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box_x = (width - list_width) / 2 - 1;
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/* create new window for the list */
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list = subwin(dialog, list_height, list_width, y + box_y + 1,
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x + box_x + 1);
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keypad(list, TRUE);
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/* draw a box around the list items */
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draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
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dlg.menubox_border.atr, dlg.menubox.atr);
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/* Find length of longest item in order to center checklist */
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check_x = 0;
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item_foreach()
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check_x = MAX(check_x, strlen(item_str()) + 4);
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check_x = MIN(check_x, list_width);
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check_x = (list_width - check_x) / 2;
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item_x = check_x + 4;
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if (choice >= list_height) {
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scroll = choice - list_height + 1;
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choice -= scroll;
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}
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/* Print the list */
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for (i = 0; i < max_choice; i++) {
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item_set(scroll + i);
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print_item(list, i, i == choice);
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}
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print_arrows(dialog, choice, item_count(), scroll,
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box_y, box_x + check_x + 5, list_height);
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print_buttons(dialog, height, width, 0);
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wnoutrefresh(dialog);
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wnoutrefresh(list);
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doupdate();
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while (key != KEY_ESC) {
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key = wgetch(dialog);
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for (i = 0; i < max_choice; i++) {
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item_set(i + scroll);
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if (toupper(key) == toupper(item_str()[0]))
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break;
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}
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if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
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key == '+' || key == '-') {
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if (key == KEY_UP || key == '-') {
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if (!choice) {
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if (!scroll)
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continue;
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/* Scroll list down */
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if (list_height > 1) {
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/* De-highlight current first item */
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item_set(scroll);
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print_item(list, 0, FALSE);
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scrollok(list, TRUE);
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wscrl(list, -1);
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scrollok(list, FALSE);
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}
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scroll--;
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item_set(scroll);
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print_item(list, 0, TRUE);
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print_arrows(dialog, choice, item_count(),
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scroll, box_y, box_x + check_x + 5, list_height);
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wnoutrefresh(dialog);
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wrefresh(list);
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continue; /* wait for another key press */
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} else
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i = choice - 1;
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} else if (key == KEY_DOWN || key == '+') {
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if (choice == max_choice - 1) {
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if (scroll + choice >= item_count() - 1)
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continue;
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/* Scroll list up */
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if (list_height > 1) {
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/* De-highlight current last item before scrolling up */
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item_set(scroll + max_choice - 1);
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print_item(list,
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max_choice - 1,
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FALSE);
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scrollok(list, TRUE);
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wscrl(list, 1);
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scrollok(list, FALSE);
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}
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scroll++;
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item_set(scroll + max_choice - 1);
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print_item(list, max_choice - 1, TRUE);
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print_arrows(dialog, choice, item_count(),
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scroll, box_y, box_x + check_x + 5, list_height);
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wnoutrefresh(dialog);
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wrefresh(list);
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continue; /* wait for another key press */
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} else
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i = choice + 1;
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}
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if (i != choice) {
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/* De-highlight current item */
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item_set(scroll + choice);
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print_item(list, choice, FALSE);
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/* Highlight new item */
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choice = i;
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item_set(scroll + choice);
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print_item(list, choice, TRUE);
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wnoutrefresh(dialog);
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wrefresh(list);
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}
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continue; /* wait for another key press */
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}
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switch (key) {
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case 'H':
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case 'h':
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case '?':
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button = 1;
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/* fall-through */
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case 'S':
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case 's':
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case ' ':
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case '\n':
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item_foreach()
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item_set_selected(0);
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item_set(scroll + choice);
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item_set_selected(1);
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delwin(list);
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delwin(dialog);
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return button;
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case TAB:
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case KEY_LEFT:
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case KEY_RIGHT:
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button = ((key == KEY_LEFT ? --button : ++button) < 0)
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? 1 : (button > 1 ? 0 : button);
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print_buttons(dialog, height, width, button);
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wrefresh(dialog);
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break;
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case 'X':
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case 'x':
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key = KEY_ESC;
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break;
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case KEY_ESC:
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key = on_key_esc(dialog);
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break;
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case KEY_RESIZE:
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delwin(list);
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delwin(dialog);
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on_key_resize();
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goto do_resize;
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}
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/* Now, update everything... */
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doupdate();
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}
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delwin(list);
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delwin(dialog);
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return key; /* ESC pressed */
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}
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