LXR linux/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 + YESNO_HEIGTH_MIN))
  49                return -ERRDISPLAYTOOSMALL;
  50        if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
  51                return -ERRDISPLAYTOOSMALL;
  52
  53        /* center dialog box on screen */
  54        x = (getmaxx(stdscr) - width) / 2;
  55        y = (getmaxy(stdscr) - 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