yesno.c revision 4024 
1/*
2 *  yesno.c -- implements the yes/no box
3 *
4 *  AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 *
6 *  This program is free software; you can redistribute it and/or
7 *  modify it under the terms of the GNU General Public License
8 *  as published by the Free Software Foundation; either version 2
9 *  of the License, or (at your option) any later version.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21
22#include <dialog.h>
23#include "dialog.priv.h"
24
25
26/*
27 * Display a dialog box with two buttons - Yes and No
28 */
29int dialog_yesno(unsigned char *title, unsigned char * prompt, int height, int width)
30{
31  int i, x, y, key = 0, button = 0;
32  WINDOW *dialog;
33
34  /* center dialog box on screen */
35  x = (COLS - width)/2;
36  y = (LINES - height)/2;
37
38#ifdef HAVE_NCURSES
39  if (use_shadow)
40    draw_shadow(stdscr, y, x, height, width);
41#endif
42  dialog = newwin(height, width, y, x);
43  if (dialog == NULL) {
44    endwin();
45    fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x);
46    exit(1);
47  }
48  keypad(dialog, TRUE);
49
50  draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
51  wattrset(dialog, border_attr);
52  wmove(dialog, height-3, 0);
53  waddch(dialog, ACS_LTEE);
54  for (i = 0; i < width-2; i++)
55    waddch(dialog, ACS_HLINE);
56  wattrset(dialog, dialog_attr);
57  waddch(dialog, ACS_RTEE);
58  wmove(dialog, height-2, 1);
59  for (i = 0; i < width-2; i++)
60    waddch(dialog, ' ');
61
62  if (title != NULL) {
63    wattrset(dialog, title_attr);
64    wmove(dialog, 0, (width - strlen(title))/2 - 1);
65    waddch(dialog, ' ');
66    waddstr(dialog, title);
67    waddch(dialog, ' ');
68  }
69  wattrset(dialog, dialog_attr);
70  wmove(dialog, 1, 2);
71  print_autowrap(dialog, prompt, height-1, width-2, width, 1, 2, TRUE, FALSE);
72
73  x = width/2-10;
74  y = height-2;
75  print_button(dialog, "  No  ", y, x+13, FALSE);
76  print_button(dialog, " Yes ", y, x, TRUE);
77  wrefresh(dialog);
78
79  while (key != ESC) {
80    key = wgetch(dialog);
81    switch (key) {
82      case 'Y':
83      case 'y':
84        delwin(dialog);
85        return 0;
86      case 'N':
87      case 'n':
88        delwin(dialog);
89        return 1;
90      case KEY_BTAB:
91      case TAB:
92      case KEY_UP:
93      case KEY_DOWN:
94      case KEY_LEFT:
95      case KEY_RIGHT:
96        if (!button) {
97          button = 1;    /* Indicates "No" button is selected */
98          print_button(dialog, " Yes ", y, x, FALSE);
99          print_button(dialog, "  No  ", y, x+13, TRUE);
100        }
101        else {
102          button = 0;    /* Indicates "Yes" button is selected */
103          print_button(dialog, "  No  ", y, x+13, FALSE);
104          print_button(dialog, " Yes ", y, x, TRUE);
105        }
106        wrefresh(dialog);
107        break;
108      case ' ':
109      case '\r':
110      case '\n':
111        delwin(dialog);
112        return button;
113      case ESC:
114        break;
115    }
116  }
117
118  delwin(dialog);
119  return -1;    /* ESC pressed */
120}
121/* End of dialog_yesno() */
122