/* *  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, checkflag;/* * Print list item */static voidprint_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);    if (checkflag == FLAG_CHECK)	wprintw (win, "[%c]", status ? 'X' : ' ');    else	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 voidprint_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 voidprint_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 * The `flag' parameter is used to select between radiolist and checklist. */intdialog_checklist (const char *title, const char *prompt, int height, int width,	int list_height, int item_no, struct dialog_list_item ** items,	int flag){    int i, x, y, box_x, box_y;    int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;    WINDOW *dialog, *list;    checkflag = flag;    /* 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] = (items[i]->selected == 1); /* ON */	if ((!choice && status[i]) || items[i]->selected == 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);    if (title != NULL && strlen(title) >= width-2 ) {	/* truncate long title -- mec */	char * title2 = malloc(width-2+1);	memcpy( title2, title, width-2 );	title2[width-2] = '\0';	title = title2;    }    if (title != NULL) {	wattrset (dialog, title_attr);	mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');	waddstr (dialog, (char *)title);	waddch (dialog, ' ');    }    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]->name) + 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]->name,		    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 (list);    wnoutrefresh (dialog);    doupdate ();    while (key != ESC) {	key = wgetch (dialog);	for (i = 0; i < max_choice; i++)	    if (toupper(key) == toupper(items[scroll + i]->name[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]->name,					status[scroll], 0, FALSE);			scrollok (list, TRUE);			wscrl (list, -1);			scrollok (list, FALSE);		    }		    scroll--;		    print_item (list, items[scroll]->name,				status[scroll], 0, TRUE);		    wnoutrefresh (list);		    print_arrows(dialog, choice, item_no, scroll,				box_y, box_x + check_x + 5, list_height);		    wrefresh (dialog);		    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]->name,				    status[scroll + max_choice - 1],				    max_choice - 1, FALSE);			scrollok (list, TRUE);			scroll (list);			scrollok (list, FALSE);		    }		    scroll++;		    print_item (list, items[scroll + max_choice - 1]->name,				status[scroll + max_choice - 1],				max_choice - 1, TRUE);		    wnoutrefresh (list);		    print_arrows(dialog, choice, item_no, scroll,				box_y, box_x + check_x + 5, list_height);		    wrefresh (dialog);		    continue;	/* wait for another key press */		} else		    i = choice + 1;	    }	    if (i != choice) {		/* De-highlight current item */		print_item (list, items[scroll + choice]->name,			    status[scroll + choice], choice, FALSE);		/* Highlight new item */		choice = i;		print_item (list, items[scroll + choice]->name,			    status[scroll + choice], choice, TRUE);		wnoutrefresh (list);		wrefresh (dialog);	    }	    continue;		/* wait for another key press */	}	switch (key) {	case 'H':	case 'h':	case '?':	    for (i = 0; i < item_no; i++)		items[i]->selected = 0;	    items[scroll + choice]->selected = 1;	    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 (flag == FLAG_CHECK) {		    status[scroll + choice] = !status[scroll + choice];		    wmove (list, choice, check_x);		    wattrset (list, check_selected_attr);		    wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');		} else {		    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]->name,					status[scroll + i], i, i == choice);		    }		}		wnoutrefresh (list);		wrefresh (dialog);		for (i = 0; i < item_no; i++) {			items[i]->selected = status[i];		}	    } else {		    for (i = 0; i < item_no; i++)			    items[i]->selected = 0;		    items[scroll + choice]->selected = 1;	    }	    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 */}