contrib/dialog/msgbox.c

   1 /*
   2  *  $Id: msgbox.c,v 1.75 2012/12/01 01:48:08 tom Exp $
   3  *
   4  *  msgbox.c -- implements the message box and info box
   5  *
   6  *  Copyright 2000-2011,2012    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         TRAVERSE_BINDINGS,
  43         SCROLLKEY_BINDINGS,
  44         END_KEYS_BINDING
  45     };
  46     /* *INDENT-ON* */
  47
  48     int x, y, last = 0, page;
  49     int button;
  50     int key = 0, fkey;
  51     int result = DLG_EXIT_UNKNOWN;
  52     WINDOW *dialog = 0;
  53     char *prompt = dlg_strclone(cprompt);
  54     const char **buttons = dlg_ok_label();
  55     int offset = 0;
  56     int check;
  57     bool show = TRUE;
  58     int min_width = (pauseopt == 1 ? 12 : 0);
  59     int save_nocancel = dialog_vars.nocancel;
  60 #ifdef KEY_RESIZE
  61     int req_high;
  62     int req_wide;
  63 #endif
  64
  65     dialog_vars.nocancel = TRUE;
  66     button = dlg_default_button();
  67
  68 #ifdef KEY_RESIZE
  69     req_high = height;
  70     req_wide = width;
  71   restart:
  72 #endif
  73
  74     dlg_button_layout(buttons, &min_width);
  75
  76     dlg_tab_correct_str(prompt);
  77     dlg_auto_size(title, prompt, &height, &width,
  78                   (pauseopt == 1 ? 2 : 0),
  79                   min_width);
  80     dlg_print_size(height, width);
  81     dlg_ctl_size(height, width);
  82
  83     x = dlg_box_x_ordinate(width);
  84     y = dlg_box_y_ordinate(height);
  85
  86 #ifdef KEY_RESIZE
  87     if (dialog != 0)
  88         dlg_move_window(dialog, height, width, y, x);
  89     else
  90 #endif
  91     {
  92         dialog = dlg_new_window(height, width, y, x);
  93         dlg_register_window(dialog, "msgbox", binding);
  94         dlg_register_buttons(dialog, "msgbox", buttons);
  95     }
  96     page = height - (1 + 3 * MARGIN);
  97
  98     dlg_mouse_setbase(x, y);
  99
 100     dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 101     dlg_draw_title(dialog, title);
 102
 103     (void) wattrset(dialog, dialog_attr);
 104
 105     if (pauseopt) {
 106         dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 107         mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
 108         dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
 109         dlg_draw_helpline(dialog, FALSE);
 110
 111         while (result == DLG_EXIT_UNKNOWN) {
 112             if (show) {
 113                 last = dlg_print_scrolled(dialog, prompt, offset,
 114                                           page, width, pauseopt);
 115                 dlg_trace_win(dialog);
 116                 show = FALSE;
 117             }
 118             key = dlg_mouse_wgetch(dialog, &fkey);
 119             if (dlg_result_key(key, fkey, &result))
 120                 break;
 121
 122             if (!fkey && (check = dlg_char_to_button(key, buttons)) >= 0) {
 123                 result = dlg_ok_buttoncode(check);
 124                 break;
 125             }
 126
 127             if (fkey) {
 128                 switch (key) {
 129 #ifdef KEY_RESIZE
 130                 case KEY_RESIZE:
 131                     dlg_clear();
 132                     height = req_high;
 133                     width = req_wide;
 134                     show = TRUE;
 135                     goto restart;
 136 #endif
 137                 case DLGK_FIELD_NEXT:
 138                     button = dlg_next_button(buttons, button);
 139                     if (button < 0)
 140                         button = 0;
 141                     dlg_draw_buttons(dialog,
 142                                      height - 2, 0,
 143                                      buttons, button,
 144                                      FALSE, width);
 145                     break;
 146                 case DLGK_FIELD_PREV:
 147                     button = dlg_prev_button(buttons, button);
 148                     if (button < 0)
 149                         button = 0;
 150                     dlg_draw_buttons(dialog,
 151                                      height - 2, 0,
 152                                      buttons, button,
 153                                      FALSE, width);
 154                     break;
 155                 case DLGK_ENTER:
 156                     result = dlg_ok_buttoncode(button);
 157                     break;
 158                 default:
 159                     if (is_DLGK_MOUSE(key)) {
 160                         result = dlg_ok_buttoncode(key - M_EVENT);
 161                         if (result < 0)
 162                             result = DLG_EXIT_OK;
 163                     } else if (dlg_check_scrolled(key,
 164                                                   last,
 165                                                   page,
 166                                                   &show,
 167                                                   &offset) == 0) {
 168                     } else {
 169                         beep();
 170                     }
 171                     break;
 172                 }
 173             } else {
 174                 beep();
 175             }
 176         }
 177     } else {
 178         dlg_print_scrolled(dialog, prompt, offset, page, width, pauseopt);
 179         dlg_draw_helpline(dialog, FALSE);
 180         wrefresh(dialog);
 181         dlg_trace_win(dialog);
 182         result = DLG_EXIT_OK;
 183     }
 184
 185     dlg_del_window(dialog);
 186     dlg_mouse_free_regions();
 187     free(prompt);
 188
 189     dialog_vars.nocancel = save_nocancel;
 190
 191     return result;
 192 }