contrib/dialog/pause.c

   1 /*
   2  *  $Id: pause.c,v 1.36 2012/07/03 00:01:59 tom Exp $
   3  *
   4  *  pause.c -- implements the pause dialog
   5  *
   6  *  Copyright 2004-2011,2012    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  *  This is adapted from source contributed by
  24  *      Yura Kalinichenko
  25  */
  26
  27 #include <dialog.h>
  28 #include <dlg_keys.h>
  29
  30 #define MY_TIMEOUT 50
  31
  32 #define MIN_HIGH (4)
  33 #define MIN_WIDE (10 + 2 * (2 + MARGIN))
  34 #define BTN_HIGH (1 + 2 * MARGIN)
  35
  36 /*
  37  * This is like gauge, but can be interrupted.
  38  *
  39  * A pause box displays a meter along the bottom of the box.  The meter
  40  * indicates how many seconds remain until the end of the pause.  The pause
  41  * exits when timeout is reached (status OK) or the user presses:
  42  *   OK button (status OK)
  43  *   CANCEL button (status CANCEL)
  44  *   Esc key (status ESC)
  45  *
  46  */
  47 int
  48 dialog_pause(const char *title,
  49              const char *cprompt,
  50              int height,
  51              int width,
  52              int seconds)
  53 {
  54     /* *INDENT-OFF* */
  55     static DLG_KEYS_BINDING binding[] = {
  56         HELPKEY_BINDINGS,
  57         ENTERKEY_BINDINGS,
  58         TRAVERSE_BINDINGS,
  59         END_KEYS_BINDING
  60     };
  61     /* *INDENT-ON* */
  62
  63 #ifdef KEY_RESIZE
  64     int old_height = height;
  65     int old_width = width;
  66 #endif
  67
  68     int i, x, y, step;
  69     int button = dlg_default_button();
  70     int seconds_orig;
  71     WINDOW *dialog;
  72     const char **buttons = dlg_ok_labels();
  73     bool have_buttons = (dlg_button_count(buttons) != 0);
  74     bool first;
  75     int key = 0, fkey;
  76     int result = DLG_EXIT_UNKNOWN;
  77     int button_high = (have_buttons ? BTN_HIGH : MARGIN);
  78     int gauge_y;
  79     char *prompt = dlg_strclone(cprompt);
  80     int save_timeout = dialog_vars.timeout_secs;
  81
  82     curs_set(0);
  83
  84     dlg_tab_correct_str(prompt);
  85
  86     dialog_vars.timeout_secs = 0;
  87     seconds_orig = (seconds > 0) ? seconds : 1;
  88
  89 #ifdef KEY_RESIZE
  90   retry:
  91     height = old_height;
  92     width = old_width;
  93 #endif
  94
  95     if (have_buttons) {
  96         dlg_auto_size(title, prompt, &height, &width,
  97                       MIN_HIGH,
  98                       MIN_WIDE);
  99         dlg_button_layout(buttons, &width);
 100     } else {
 101         dlg_auto_size(title, prompt, &height, &width,
 102                       MIN_HIGH + MARGIN - BTN_HIGH,
 103                       MIN_WIDE);
 104     }
 105     gauge_y = height - button_high - (1 + 2 * MARGIN);
 106     dlg_print_size(height, width);
 107     dlg_ctl_size(height, width);
 108
 109     /* center dialog box on screen */
 110     x = dlg_box_x_ordinate(width);
 111     y = dlg_box_y_ordinate(height);
 112
 113     dialog = dlg_new_window(height, width, y, x);
 114     dlg_register_window(dialog, "pause", binding);
 115     dlg_register_buttons(dialog, "pause", buttons);
 116
 117     dlg_mouse_setbase(x, y);
 118     nodelay(dialog, TRUE);
 119
 120     first = TRUE;
 121     do {
 122         (void) werase(dialog);
 123         dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 124
 125         dlg_draw_title(dialog, title);
 126         dlg_draw_helpline(dialog, FALSE);
 127
 128         (void) wattrset(dialog, dialog_attr);
 129         dlg_print_autowrap(dialog, prompt, height, width);
 130
 131         dlg_draw_box2(dialog,
 132                       gauge_y, 2 + MARGIN,
 133                       2 + MARGIN, width - 2 * (2 + MARGIN),
 134                       dialog_attr,
 135                       border_attr,
 136                       border2_attr);
 137
 138         /*
 139          * Clear the area for the progress bar by filling it with spaces
 140          * in the title-attribute, and write the percentage with that
 141          * attribute.
 142          */
 143         (void) wmove(dialog, gauge_y + MARGIN, 4);
 144         (void) wattrset(dialog, title_attr);
 145
 146         for (i = 0; i < (width - 2 * (3 + MARGIN)); i++)
 147             (void) waddch(dialog, ' ');
 148
 149         (void) wmove(dialog, gauge_y + MARGIN, (width / 2) - 2);
 150         (void) wprintw(dialog, "%3d", seconds);
 151
 152         /*
 153          * Now draw a bar in reverse, relative to the background.
 154          * The window attribute was useful for painting the background,
 155          * but requires some tweaks to reverse it.
 156          */
 157         x = (seconds * (width - 2 * (3 + MARGIN))) / seconds_orig;
 158         if ((title_attr & A_REVERSE) != 0) {
 159             wattroff(dialog, A_REVERSE);
 160         } else {
 161             (void) wattrset(dialog, A_REVERSE);
 162         }
 163         (void) wmove(dialog, gauge_y + MARGIN, 4);
 164         for (i = 0; i < x; i++) {
 165             chtype ch = winch(dialog);
 166             if (title_attr & A_REVERSE) {
 167                 ch &= ~A_REVERSE;
 168             }
 169             (void) waddch(dialog, ch);
 170         }
 171
 172         mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
 173         if (have_buttons) {
 174             dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 175             dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
 176         }
 177         if (first) {
 178             (void) wrefresh(dialog);
 179             dlg_trace_win(dialog);
 180             first = FALSE;
 181         }
 182
 183         for (step = 0;
 184              (result == DLG_EXIT_UNKNOWN) && (step < 1000);
 185              step += MY_TIMEOUT) {
 186
 187             napms(MY_TIMEOUT);
 188             key = dlg_mouse_wgetch_nowait(dialog, &fkey);
 189             if (key == ERR) {
 190                 ;               /* ignore errors in nodelay mode */
 191             } else {
 192                 if (dlg_result_key(key, fkey, &result))
 193                     break;
 194             }
 195
 196             switch (key) {
 197 #ifdef KEY_RESIZE
 198             case KEY_RESIZE:
 199                 dlg_clear();    /* fill the background */
 200                 dlg_del_window(dialog);         /* delete this window */
 201                 refresh();      /* get it all onto the terminal */
 202                 goto retry;
 203 #endif
 204             case DLGK_FIELD_NEXT:
 205                 button = dlg_next_button(buttons, button);
 206                 if (button < 0)
 207                     button = 0;
 208                 dlg_draw_buttons(dialog,
 209                                  height - 2, 0,
 210                                  buttons, button,
 211                                  FALSE, width);
 212                 break;
 213             case DLGK_FIELD_PREV:
 214                 button = dlg_prev_button(buttons, button);
 215                 if (button < 0)
 216                     button = 0;
 217                 dlg_draw_buttons(dialog,
 218                                  height - 2, 0,
 219                                  buttons, button,
 220                                  FALSE, width);
 221                 break;
 222             case DLGK_ENTER:
 223                 result = dlg_enter_buttoncode(button);
 224                 break;
 225             case ERR:
 226                 break;
 227             default:
 228                 if (is_DLGK_MOUSE(key)) {
 229                     result = dlg_ok_buttoncode(key - M_EVENT);
 230                     if (result < 0)
 231                         result = DLG_EXIT_OK;
 232                 }
 233                 break;
 234             }
 235         }
 236     } while ((result == DLG_EXIT_UNKNOWN) && (seconds-- > 0));
 237
 238     curs_set(1);
 239     dlg_mouse_free_regions();
 240     dlg_del_window(dialog);
 241     free(prompt);
 242
 243     dialog_vars.timeout_secs = save_timeout;
 244
 245     return ((result == DLG_EXIT_UNKNOWN) ? DLG_EXIT_OK : result);
 246 }