Root/scripts/kconfig/lxdialog/yesno.c

1/*
2 * yesno.c -- implements the yes/no box
3 *
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include "dialog.h"
23
24/*
25 * Display termination buttons
26 */
27static void print_buttons(WINDOW * dialog, int height, int width, int selected)
28{
29    int x = width / 2 - 10;
30    int y = height - 2;
31
32    print_button(dialog, gettext(" Yes "), y, x, selected == 0);
33    print_button(dialog, gettext(" No "), y, x + 13, selected == 1);
34
35    wmove(dialog, y, x + 1 + 13 * selected);
36    wrefresh(dialog);
37}
38
39/*
40 * Display a dialog box with two buttons - Yes and No
41 */
42int dialog_yesno(const char *title, const char *prompt, int height, int width)
43{
44    int i, x, y, key = 0, button = 0;
45    WINDOW *dialog;
46
47do_resize:
48    if (getmaxy(stdscr) < (height + 4))
49        return -ERRDISPLAYTOOSMALL;
50    if (getmaxx(stdscr) < (width + 4))
51        return -ERRDISPLAYTOOSMALL;
52
53    /* center dialog box on screen */
54    x = (COLS - width) / 2;
55    y = (LINES - height) / 2;
56
57    draw_shadow(stdscr, y, x, height, width);
58
59    dialog = newwin(height, width, y, x);
60    keypad(dialog, TRUE);
61
62    draw_box(dialog, 0, 0, height, width,
63         dlg.dialog.atr, dlg.border.atr);
64    wattrset(dialog, dlg.border.atr);
65    mvwaddch(dialog, height - 3, 0, ACS_LTEE);
66    for (i = 0; i < width - 2; i++)
67        waddch(dialog, ACS_HLINE);
68    wattrset(dialog, dlg.dialog.atr);
69    waddch(dialog, ACS_RTEE);
70
71    print_title(dialog, title, width);
72
73    wattrset(dialog, dlg.dialog.atr);
74    print_autowrap(dialog, prompt, width - 2, 1, 3);
75
76    print_buttons(dialog, height, width, 0);
77
78    while (key != KEY_ESC) {
79        key = wgetch(dialog);
80        switch (key) {
81        case 'Y':
82        case 'y':
83            delwin(dialog);
84            return 0;
85        case 'N':
86        case 'n':
87            delwin(dialog);
88            return 1;
89
90        case TAB:
91        case KEY_LEFT:
92        case KEY_RIGHT:
93            button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
94
95            print_buttons(dialog, height, width, button);
96            wrefresh(dialog);
97            break;
98        case ' ':
99        case '\n':
100            delwin(dialog);
101            return button;
102        case KEY_ESC:
103            key = on_key_esc(dialog);
104            break;
105        case KEY_RESIZE:
106            delwin(dialog);
107            on_key_resize();
108            goto do_resize;
109        }
110    }
111
112    delwin(dialog);
113    return key; /* ESC pressed */
114}
115

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