contrib/dialog/msgbox.c

   1 /*
   2  *  $Id: msgbox.c,v 1.66 2011/06/27 08:36:28 tom Exp $
   3  *
   4  *  msgbox.c -- implements the message box and info box
   5  *
   6  *  Copyright 2000-2010,2011    Thomas E. Dickey
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU Lesser General Public License, version 2.1
  10  *  as published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Lesser General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Lesser General Public
  18  *  License along with this program; if not, write to
  19  *      Free Software Foundation, Inc.
  20  *      51 Franklin St., Fifth Floor
  21  *      Boston, MA 02110, USA.
  22  *
  23  *  An earlier version of this program lists as authors:
  24  *      Savio Lam (lam836@cs.cuhk.hk)
  25  */
  26
  27 #include <dialog.h>
  28 #include <dlg_keys.h>
  29
  30 /*
  31  * Display a message box. Program will pause and display an "OK" button
  32  * if the parameter 'pauseopt' is non-zero.
  33  */
  34 int
  35 dialog_msgbox(const char *title, const char *cprompt, int height, int width,
  36               int pauseopt)
  37 {
  38     /* *INDENT-OFF* */
  39     static DLG_KEYS_BINDING binding[] = {
  40         HELPKEY_BINDINGS,
  41         ENTERKEY_BINDINGS,
  42         DLG_KEYS_DATA( DLGK_ENTER,      ' ' ),
  43         SCROLLKEY_BINDINGS,
  44         DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_DOWN ),
  45         DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
  46         DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
  47         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_UP ),
  48         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
  49         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
  50         END_KEYS_BINDING
  51     };
  52     /* *INDENT-ON* */
  53
  54     int x, y, last = 0, page;
  55     int button = 0;
  56     int key = 0, fkey;
  57     int result = DLG_EXIT_UNKNOWN;
  58     WINDOW *dialog = 0;
  59     char *prompt = dlg_strclone(cprompt);
  60     const char **buttons = dlg_ok_label();
  61     int offset = 0;
  62     int check;
  63     bool show = TRUE;
  64     int min_width = (pauseopt == 1 ? 12 : 0);
  65
  66 #ifdef KEY_RESIZE
  67     int req_high = height;
  68     int req_wide = width;
  69   restart:
  70 #endif
  71
  72     dlg_button_layout(buttons, &min_width);
  73
  74     dlg_tab_correct_str(prompt);
  75     dlg_auto_size(title, prompt, &height, &width,
  76                   (pauseopt == 1 ? 2 : 0),
  77                   min_width);
  78     dlg_print_size(height, width);
  79     dlg_ctl_size(height, width);
  80
  81     x = dlg_box_x_ordinate(width);
  82     y = dlg_box_y_ordinate(height);
  83
  84 #ifdef KEY_RESIZE
  85     if (dialog != 0)
  86         dlg_move_window(dialog, height, width, y, x);
  87     else
  88 #endif
  89     {
  90         dialog = dlg_new_window(height, width, y, x);
  91         dlg_register_window(dialog, "msgbox", binding);
  92         dlg_register_buttons(dialog, "msgbox", buttons);
  93     }
  94     page = height - (1 + 3 * MARGIN);
  95
  96     dlg_mouse_setbase(x, y);
  97
  98     dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
  99     dlg_draw_title(dialog, title);
 100
 101     wattrset(dialog, dialog_attr);
 102
 103     if (pauseopt) {
 104         dlg_draw_bottom_box(dialog);
 105         mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
 106         dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
 107         dlg_draw_helpline(dialog, FALSE);
 108
 109         while (result == DLG_EXIT_UNKNOWN) {
 110             if (show) {
 111                 last = dlg_print_scrolled(dialog, prompt, offset,
 112                                           page, width, pauseopt);
 113                 show = FALSE;
 114             }
 115             key = dlg_mouse_wgetch(dialog, &fkey);
 116             if (dlg_result_key(key, fkey, &result))
 117                 break;
 118
 119             if (!fkey && (check = dlg_char_to_button(key, buttons)) >= 0) {
 120                 result = check ? DLG_EXIT_HELP : DLG_EXIT_OK;
 121                 break;
 122             }
 123
 124             if (fkey) {
 125                 switch (key) {
 126 #ifdef KEY_RESIZE
 127                 case KEY_RESIZE:
 128                     dlg_clear();
 129                     height = req_high;
 130                     width = req_wide;
 131                     show = TRUE;
 132                     goto restart;
 133 #endif
 134                 case DLGK_FIELD_NEXT:
 135                     button = dlg_next_button(buttons, button);
 136                     if (button < 0)
 137                         button = 0;
 138                     dlg_draw_buttons(dialog,
 139                                      height - 2, 0,
 140                                      buttons, button,
 141                                      FALSE, width);
 142                     break;
 143                 case DLGK_FIELD_PREV:
 144                     button = dlg_prev_button(buttons, button);
 145                     if (button < 0)
 146                         button = 0;
 147                     dlg_draw_buttons(dialog,
 148                                      height - 2, 0,
 149                                      buttons, button,
 150                                      FALSE, width);
 151                     break;
 152                 case DLGK_ENTER:
 153                     result = button ? DLG_EXIT_HELP : DLG_EXIT_OK;
 154                     break;
 155                 case DLGK_MOUSE(0):
 156                     result = DLG_EXIT_OK;
 157                     break;
 158                 case DLGK_MOUSE(1):
 159                     result = DLG_EXIT_HELP;
 160                     break;
 161                 default:
 162                     if (dlg_check_scrolled(key,
 163                                            last,
 164                                            page,
 165                                            &show,
 166                                            &offset) == 0)
 167                         break;
 168                     beep();
 169                     break;
 170                 }
 171             } else {
 172                 beep();
 173             }
 174         }
 175     } else {
 176         dlg_print_scrolled(dialog, prompt, offset, page, width, pauseopt);
 177         dlg_draw_helpline(dialog, FALSE);
 178         wrefresh(dialog);
 179         result = DLG_EXIT_OK;
 180     }
 181
 182     dlg_del_window(dialog);
 183     dlg_mouse_free_regions();
 184     free(prompt);
 185     return result;
 186 }