scripts/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
  28 print_buttons(WINDOW *dialog, int height, int width, int selected)
  29 {
  30     int x = width / 2 - 10;
  31     int y = height - 2;
  32
  33     print_button (dialog, " Yes ", y, x, selected == 0);
  34     print_button (dialog, "  No  ", y, x + 13, selected == 1);
  35
  36     wmove(dialog, y, x+1 + 13*selected );
  37     wrefresh (dialog);
  38 }
  39
  40 /*
  41  * Display a dialog box with two buttons - Yes and No
  42  */
  43 int
  44 dialog_yesno (const char *title, const char *prompt, int height, int width)
  45 {
  46     int i, x, y, key = 0, button = 0;
  47     WINDOW *dialog;
  48
  49     /* center dialog box on screen */
  50     x = (COLS - width) / 2;
  51     y = (LINES - height) / 2;
  52
  53     draw_shadow (stdscr, y, x, height, width);
  54
  55     dialog = newwin (height, width, y, x);
  56     keypad (dialog, TRUE);
  57
  58     draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
  59     wattrset (dialog, border_attr);
  60     mvwaddch (dialog, height-3, 0, ACS_LTEE);
  61     for (i = 0; i < width - 2; i++)
  62         waddch (dialog, ACS_HLINE);
  63     wattrset (dialog, dialog_attr);
  64     waddch (dialog, ACS_RTEE);
  65
  66     if (title != NULL && strlen(title) >= width-2 ) {
  67         /* truncate long title -- mec */
  68         char * title2 = malloc(width-2+1);
  69         memcpy( title2, title, width-2 );
  70         title2[width-2] = '\0';
  71         title = title2;
  72     }
  73
  74     if (title != NULL) {
  75         wattrset (dialog, title_attr);
  76         mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
  77         waddstr (dialog, (char *)title);
  78         waddch (dialog, ' ');
  79     }
  80
  81     wattrset (dialog, dialog_attr);
  82     print_autowrap (dialog, prompt, width - 2, 1, 3);
  83
  84     print_buttons(dialog, height, width, 0);
  85
  86     while (key != ESC) {
  87         key = wgetch (dialog);
  88         switch (key) {
  89         case 'Y':
  90         case 'y':
  91             delwin (dialog);
  92             return 0;
  93         case 'N':
  94         case 'n':
  95             delwin (dialog);
  96             return 1;
  97
  98         case TAB:
  99         case KEY_LEFT:
 100         case KEY_RIGHT:
 101             button = ((key == KEY_LEFT ? --button : ++button) < 0)
 102                         ? 1 : (button > 1 ? 0 : button);
 103
 104             print_buttons(dialog, height, width, button);
 105             wrefresh (dialog);
 106             break;
 107         case ' ':
 108         case '\n':
 109             delwin (dialog);
 110             return button;
 111         case ESC:
 112             break;
 113         }
 114     }
 115
 116     delwin (dialog);
 117     return -1;                  /* ESC pressed */
 118 }