372 lines
9.6 KiB
C
372 lines
9.6 KiB
C
/*
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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, checkflag;
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/*
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* Print list item
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*/
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static void
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print_item (WINDOW * win, const char *item, int status,
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int choice, int selected)
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{
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int i;
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/* Clear 'residue' of last item */
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wattrset (win, menubox_attr);
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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 ? check_selected_attr : check_attr);
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if (checkflag == FLAG_CHECK)
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wprintw (win, "[%c]", status ? 'X' : ' ');
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else
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wprintw (win, "(%c)", status ? 'X' : ' ');
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wattrset (win, selected ? tag_selected_attr : tag_attr);
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mvwaddch(win, choice, item_x, item[0]);
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wattrset (win, selected ? item_selected_attr : item_attr);
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waddstr (win, (char *)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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}
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/*
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* Print the scroll indicators.
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*/
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static void
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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, uarrow_attr);
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waddch (win, ACS_UARROW);
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waddstr (win, "(-)");
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}
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else {
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wattrset (win, menubox_attr);
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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, darrow_attr);
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waddch (win, ACS_DARROW);
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waddstr (win, "(+)");
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}
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else {
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wattrset (win, menubox_border_attr);
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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
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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, "Select", y, x, selected == 0);
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print_button (dialog, " 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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* The `flag' parameter is used to select between radiolist and checklist.
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*/
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int
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dialog_checklist (const char *title, const char *prompt, int height, int width,
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int list_height, int item_no, struct dialog_list_item ** items,
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int flag)
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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, *status;
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WINDOW *dialog, *list;
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checkflag = flag;
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/* Allocate space for storing item on/off status */
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if ((status = malloc (sizeof (int) * item_no)) == NULL) {
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endwin ();
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fprintf (stderr,
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"\nCan't allocate memory in dialog_checklist().\n");
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exit (-1);
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}
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/* Initializes status */
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for (i = 0; i < item_no; i++) {
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status[i] = (items[i]->selected == 1); /* ON */
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if ((!choice && status[i]) || items[i]->selected == 2) /* SELECTED */
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choice = i + 1;
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}
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if (choice)
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choice--;
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max_choice = MIN (list_height, item_no);
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/* center dialog box on screen */
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x = (COLS - width) / 2;
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y = (LINES - 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, dialog_attr, border_attr);
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wattrset (dialog, border_attr);
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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, dialog_attr);
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waddch (dialog, ACS_RTEE);
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if (title != NULL && strlen(title) >= width-2 ) {
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/* truncate long title -- mec */
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char * title2 = malloc(width-2+1);
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memcpy( title2, title, width-2 );
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title2[width-2] = '\0';
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title = title2;
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}
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if (title != NULL) {
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wattrset (dialog, title_attr);
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mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
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waddstr (dialog, (char *)title);
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waddch (dialog, ' ');
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}
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wattrset (dialog, dialog_attr);
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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, 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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menubox_border_attr, menubox_attr);
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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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for (i = 0; i < item_no; i++)
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check_x = MAX (check_x, + strlen (items[i]->name) + 4);
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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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print_item (list, items[scroll + i]->name,
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status[i+scroll], i, i == choice);
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}
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print_arrows(dialog, choice, item_no, 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 (list);
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wnoutrefresh (dialog);
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doupdate ();
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while (key != ESC) {
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key = wgetch (dialog);
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for (i = 0; i < max_choice; i++)
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if (toupper(key) == toupper(items[scroll + i]->name[0]))
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break;
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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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print_item (list, items[scroll]->name,
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status[scroll], 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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print_item (list, items[scroll]->name,
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status[scroll], 0, TRUE);
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wnoutrefresh (list);
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print_arrows(dialog, choice, item_no, scroll,
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box_y, box_x + check_x + 5, list_height);
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wrefresh (dialog);
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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_no - 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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print_item (list, items[scroll + max_choice - 1]->name,
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status[scroll + max_choice - 1],
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max_choice - 1, FALSE);
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scrollok (list, TRUE);
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scroll (list);
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scrollok (list, FALSE);
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}
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scroll++;
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print_item (list, items[scroll + max_choice - 1]->name,
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status[scroll + max_choice - 1],
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max_choice - 1, TRUE);
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wnoutrefresh (list);
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print_arrows(dialog, choice, item_no, scroll,
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box_y, box_x + check_x + 5, list_height);
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wrefresh (dialog);
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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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print_item (list, items[scroll + choice]->name,
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status[scroll + choice], choice, FALSE);
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/* Highlight new item */
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choice = i;
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print_item (list, items[scroll + choice]->name,
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status[scroll + choice], choice, TRUE);
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wnoutrefresh (list);
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wrefresh (dialog);
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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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for (i = 0; i < item_no; i++)
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items[i]->selected = 0;
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items[scroll + choice]->selected = 1;
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delwin (dialog);
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free (status);
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return 1;
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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 'S':
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case 's':
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case ' ':
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case '\n':
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if (!button) {
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if (flag == FLAG_CHECK) {
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status[scroll + choice] = !status[scroll + choice];
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wmove (list, choice, check_x);
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wattrset (list, check_selected_attr);
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wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');
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} else {
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if (!status[scroll + choice]) {
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for (i = 0; i < item_no; i++)
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status[i] = 0;
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status[scroll + choice] = 1;
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for (i = 0; i < max_choice; i++)
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print_item (list, items[scroll + i]->name,
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status[scroll + i], i, i == choice);
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}
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}
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wnoutrefresh (list);
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wrefresh (dialog);
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for (i = 0; i < item_no; i++) {
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items[i]->selected = status[i];
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}
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} else {
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for (i = 0; i < item_no; i++)
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items[i]->selected = 0;
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items[scroll + choice]->selected = 1;
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}
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delwin (dialog);
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free (status);
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return button;
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case 'X':
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case 'x':
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key = ESC;
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case ESC:
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break;
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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 (dialog);
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free (status);
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return -1; /* ESC pressed */
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}
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