scripts/config/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  */
  27 static 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, " Yes ", y, x, selected == 0);
  33         print_button(dialog, "  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  */
  42 int 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
  47         /* center dialog box on screen */
  48         x = (COLS - width) / 2;
  49         y = (LINES - height) / 2;
  50
  51         draw_shadow(stdscr, y, x, height, width);
  52
  53         dialog = newwin(height, width, y, x);
  54         keypad(dialog, TRUE);
  55
  56         draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
  57         wattrset(dialog, border_attr);
  58         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  59         for (i = 0; i < width - 2; i++)
  60                 waddch(dialog, ACS_HLINE);
  61         wattrset(dialog, dialog_attr);
  62         waddch(dialog, ACS_RTEE);
  63
  64         print_title(dialog, title, width);
  65
  66         wattrset(dialog, dialog_attr);
  67         print_autowrap(dialog, prompt, width - 2, 1, 3);
  68
  69         print_buttons(dialog, height, width, 0);
  70
  71         while (key != ESC) {
  72                 key = wgetch(dialog);
  73                 switch (key) {
  74                 case 'Y':
  75                 case 'y':
  76                         delwin(dialog);
  77                         return 0;
  78                 case 'N':
  79                 case 'n':
  80                         delwin(dialog);
  81                         return 1;
  82
  83                 case TAB:
  84                 case KEY_LEFT:
  85                 case KEY_RIGHT:
  86                         button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
  87
  88                         print_buttons(dialog, height, width, button);
  89                         wrefresh(dialog);
  90                         break;
  91                 case ' ':
  92                 case '\n':
  93                         delwin(dialog);
  94                         return button;
  95                 case ESC:
  96                         break;
  97                 }
  98         }
  99
 100         delwin(dialog);
 101         return -1;              /* ESC pressed */
 102 }