scripts/lxdialog/yesno.c

/*
 *  yesno.c -- implements the yes/no box
 *
 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
 *  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"

/*
 * Display termination buttons
 */
static void print_buttons(WINDOW * dialog, int height, int width, int selected)
{
	int x = width / 2 - 10;
	int y = height - 2;

	print_button(dialog, " Yes ", y, x, selected == 0);
	print_button(dialog, "  No  ", y, x + 13, selected == 1);

	wmove(dialog, y, x + 1 + 13 * selected);
	wrefresh(dialog);
}

/*
 * Display a dialog box with two buttons - Yes and No
 */
int dialog_yesno(const char *title, const char *prompt, int height, int width)
{
	int i, x, y, key = 0, button = 0;
	WINDOW *dialog;

	/* 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);

	print_buttons(dialog, height, width, 0);

	while (key != ESC) {
		key = wgetch(dialog);
		switch (key) {
		case 'Y':
		case 'y':
			delwin(dialog);
			return 0;
		case 'N':
		case 'n':
			delwin(dialog);
			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 ' ':
		case '\n':
			delwin(dialog);
			return button;
		case ESC:
			break;
		}
	}

	delwin(dialog);
	return -1;		/* ESC pressed */
}