src/menu.c

   1 /* Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   2    2007, 2009 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 /** \file menu.c
  19  *  \brief Source: pulldown menu code
  20  */
  21
  22 #include <config.h>
  23
  24 #include <ctype.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28
  29 #include "lib/global.h"
  30
  31 #include "lib/tty/tty.h"
  32 #include "lib/skin/skin.h"
  33 #include "lib/tty/mouse.h"
  34 #include "lib/tty/key.h"        /* key macros */
  35 #include "lib/strutil.h"
  36
  37 #include "cmddef.h"             /* CK_Ignore_Key */
  38 #include "help.h"
  39 #include "dialog.h"
  40 #include "widget.h"
  41 #include "main.h"               /* is_right */
  42 #include "menu.h"
  43
  44 int menubar_visible = 1;        /* This is the new default */
  45
  46 static cb_ret_t menubar_callback (Widget *w, widget_msg_t msg, int parm);
  47
  48 menu_entry_t *
  49 menu_entry_create (const char *name, unsigned long command)
  50 {
  51     menu_entry_t *entry;
  52
  53     entry = g_new (menu_entry_t, 1);
  54     entry->first_letter = ' ';
  55     entry->text = parse_hotkey (name);
  56     entry->command = command;
  57     entry->shortcut = NULL;
  58
  59     return entry;
  60 }
  61
  62 void
  63 menu_entry_free (menu_entry_t *entry)
  64 {
  65     if (entry != NULL) {
  66         release_hotkey (entry->text);
  67         g_free (entry->shortcut);
  68         g_free (entry);
  69     }
  70 }
  71
  72 static void
  73 menu_arrange (Menu *menu, dlg_shortcut_str get_shortcut)
  74 {
  75     if (menu != NULL) {
  76         GList *i;
  77         size_t max_shortcut_len = 0;
  78
  79         menu->max_entry_len = 1;
  80         menu->max_hotkey_len = 1;
  81
  82         for (i = menu->entries; i != NULL; i = g_list_next (i)) {
  83             menu_entry_t *entry = i->data;
  84
  85             if (entry != NULL) {
  86                 size_t len;
  87
  88                 len = (size_t) hotkey_width (entry->text);
  89                 menu->max_hotkey_len = max (menu->max_hotkey_len, len);
  90
  91                 if (get_shortcut != NULL)
  92                     entry->shortcut = get_shortcut (entry->command);
  93
  94                 if (entry->shortcut != NULL) {
  95                     len = (size_t) str_term_width1 (entry->shortcut);
  96                     max_shortcut_len = max (max_shortcut_len, len);
  97                 }
  98             }
  99         }
 100
 101         menu->max_entry_len = menu->max_hotkey_len + max_shortcut_len;
 102     }
 103 }
 104
 105 Menu *
 106 create_menu (const char *name, GList *entries, const char *help_node)
 107 {
 108     Menu *menu;
 109
 110     menu = g_new (Menu, 1);
 111     menu->start_x = 0;
 112     menu->text = parse_hotkey (name);
 113     menu->entries = entries;
 114     menu->max_entry_len = 1;
 115     menu->max_hotkey_len = 0;
 116     menu->selected = 0;
 117     menu->help_node = g_strdup (help_node);
 118
 119     return menu;
 120 }
 121
 122 void
 123 destroy_menu (Menu *menu)
 124 {
 125     release_hotkey (menu->text);
 126     g_list_foreach (menu->entries, (GFunc) menu_entry_free, NULL);
 127     g_list_free (menu->entries);
 128     g_free (menu->help_node);
 129     g_free (menu);
 130 }
 131
 132 static void
 133 menubar_paint_idx (WMenuBar *menubar, unsigned int idx, int color)
 134 {
 135     const Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 136     const menu_entry_t *entry = g_list_nth_data (menu->entries, idx);
 137     const int y = 2 + idx;
 138     int x = menu->start_x;
 139
 140     if (x + menu->max_entry_len + 4 > (gsize) menubar->widget.cols)
 141         x = menubar->widget.cols - menu->max_entry_len - 4;
 142
 143     if (entry == NULL) {
 144         /* menu separator */
 145         tty_setcolor (MENU_ENTRY_COLOR);
 146
 147         widget_move (&menubar->widget, y, x - 1);
 148         tty_print_alt_char (ACS_LTEE);
 149
 150         tty_draw_hline (menubar->widget.y + y, menubar->widget.x + x,
 151                             ACS_HLINE, menu->max_entry_len + 3);
 152
 153         widget_move (&menubar->widget, y, x + menu->max_entry_len + 3);
 154         tty_print_alt_char (ACS_RTEE);
 155     } else {
 156         /* menu text */
 157         tty_setcolor (color);
 158         widget_move (&menubar->widget, y, x);
 159         tty_print_char ((unsigned char) entry->first_letter);
 160         tty_draw_hline (-1, -1, ' ', menu->max_entry_len + 2); /* clear line */
 161         tty_print_string (entry->text.start);
 162
 163         if (entry->text.hotkey != NULL) {
 164             tty_setcolor (color == MENU_SELECTED_COLOR ?
 165                             MENU_HOTSEL_COLOR : MENU_HOT_COLOR);
 166             tty_print_string (entry->text.hotkey);
 167             tty_setcolor (color);
 168         }
 169
 170         if (entry->text.end != NULL)
 171             tty_print_string (entry->text.end);
 172
 173         if (entry->shortcut != NULL) {
 174             widget_move (&menubar->widget, y, x + menu->max_hotkey_len + 3);
 175             tty_print_string (entry->shortcut);
 176         }
 177
 178         /* move cursor to the start of entry text */
 179         widget_move (&menubar->widget, y, x + 1);
 180     }
 181 }
 182
 183 static void
 184 menubar_draw_drop (WMenuBar *menubar)
 185 {
 186     const Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 187     const unsigned int count = g_list_length (menu->entries);
 188     int column = menu->start_x - 1;
 189     unsigned int i;
 190
 191     if (column + menu->max_entry_len + 5 > (gsize) menubar->widget.cols)
 192         column = menubar->widget.cols - menu->max_entry_len - 5;
 193
 194     tty_setcolor (MENU_ENTRY_COLOR);
 195     draw_box (menubar->widget.parent,
 196                  menubar->widget.y + 1, menubar->widget.x + column,
 197                  count + 2, menu->max_entry_len + 5);
 198
 199     /* draw items except selected */
 200     for (i = 0; i < count; i++)
 201         if (i != menu->selected)
 202             menubar_paint_idx (menubar, i, MENU_ENTRY_COLOR);
 203
 204     /* draw selected item at last to move cursor to the nice location */
 205     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 206 }
 207
 208 static void
 209 menubar_set_color (WMenuBar *menubar, gboolean current, gboolean hotkey)
 210 {
 211     if (!menubar->is_active)
 212         tty_setcolor (hotkey ? COLOR_HOT_FOCUS : SELECTED_COLOR);
 213     else if (current)
 214         tty_setcolor (hotkey ? MENU_HOTSEL_COLOR : MENU_SELECTED_COLOR);
 215     else
 216         tty_setcolor (hotkey ? MENU_HOT_COLOR : MENU_ENTRY_COLOR);
 217 }
 218
 219 static void
 220 menubar_draw (WMenuBar *menubar)
 221 {
 222     GList *i;
 223
 224     /* First draw the complete menubar */
 225     tty_setcolor (menubar->is_active ? MENU_ENTRY_COLOR : SELECTED_COLOR);
 226     tty_draw_hline (menubar->widget.y, menubar->widget.x, ' ', menubar->widget.cols);
 227
 228     /* Now each one of the entries */
 229     for (i = menubar->menu; i != NULL; i = g_list_next (i)) {
 230         Menu *menu = i->data;
 231         gboolean is_selected = (menubar->selected == (gsize) g_list_position (menubar->menu, i));
 232
 233         menubar_set_color (menubar, is_selected, FALSE);
 234         widget_move (&menubar->widget, 0, menu->start_x);
 235
 236         tty_print_char (' ');
 237         tty_print_string (menu->text.start);
 238
 239         if (menu->text.hotkey != NULL) {
 240             menubar_set_color (menubar, is_selected, TRUE);
 241             tty_print_string (menu->text.hotkey);
 242             menubar_set_color (menubar, is_selected, FALSE);
 243         }
 244
 245         if (menu->text.end != NULL)
 246             tty_print_string (menu->text.end);
 247
 248         tty_print_char (' ');
 249     }
 250
 251     if (menubar->is_dropped)
 252         menubar_draw_drop (menubar);
 253     else
 254         widget_move (&menubar->widget, 0,
 255                         ((Menu *) g_list_nth_data (menubar->menu,
 256                                         menubar->selected))->start_x);
 257 }
 258
 259 static void
 260 menubar_remove (WMenuBar *menubar)
 261 {
 262     if (menubar->is_dropped) {
 263         menubar->is_dropped = FALSE;
 264         do_refresh ();
 265         menubar->is_dropped = TRUE;
 266     }
 267 }
 268
 269 static void
 270 menubar_left (WMenuBar *menubar)
 271 {
 272     menubar_remove (menubar);
 273     if (menubar->selected == 0)
 274         menubar->selected = g_list_length (menubar->menu) - 1;
 275     else
 276         menubar->selected--;
 277     menubar_draw (menubar);
 278 }
 279
 280 static void
 281 menubar_right (WMenuBar *menubar)
 282 {
 283     menubar_remove (menubar);
 284     menubar->selected = (menubar->selected + 1) % g_list_length (menubar->menu);
 285     menubar_draw (menubar);
 286 }
 287
 288 static void
 289 menubar_finish (WMenuBar *menubar)
 290 {
 291     menubar->is_dropped = FALSE;
 292     menubar->is_active = FALSE;
 293     menubar->widget.lines = 1;
 294     widget_want_hotkey (menubar->widget, 0);
 295
 296     dlg_select_by_id (menubar->widget.parent, menubar->previous_widget);
 297     do_refresh ();
 298 }
 299
 300 static void
 301 menubar_drop (WMenuBar *menubar, unsigned int selected)
 302 {
 303     menubar->is_dropped = TRUE;
 304     menubar->selected = selected;
 305     menubar_draw (menubar);
 306 }
 307
 308 static void
 309 menubar_execute (WMenuBar *menubar)
 310 {
 311     const Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 312     const menu_entry_t *entry = g_list_nth_data (menu->entries, menu->selected);
 313
 314     if ((entry != NULL) && (entry->command != CK_Ignore_Key)) {
 315         is_right = (menubar->selected != 0);
 316         menubar_finish (menubar);
 317         menubar->widget.parent->callback (menubar->widget.parent, &menubar->widget,
 318                                             DLG_ACTION, entry->command, NULL);
 319         do_refresh ();
 320     }
 321 }
 322
 323 static void
 324 menubar_down (WMenuBar *menubar)
 325 {
 326     Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 327     const unsigned int len = g_list_length (menu->entries);
 328     menu_entry_t *entry;
 329
 330     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 331
 332     do {
 333         menu->selected = (menu->selected + 1) % len;
 334         entry = (menu_entry_t *) g_list_nth_data (menu->entries, menu->selected);
 335     } while ((entry == NULL) || (entry->command == CK_Ignore_Key));
 336
 337     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 338 }
 339
 340 static void
 341 menubar_up (WMenuBar *menubar)
 342 {
 343     Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 344     const unsigned int len = g_list_length (menu->entries);
 345     menu_entry_t *entry;
 346
 347     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 348
 349     do {
 350         if (menu->selected == 0)
 351             menu->selected = len - 1;
 352         else
 353             menu->selected--;
 354         entry = (menu_entry_t *) g_list_nth_data (menu->entries, menu->selected);
 355     } while ((entry == NULL) || (entry->command == CK_Ignore_Key));
 356
 357     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 358 }
 359
 360 static void
 361 menubar_first (WMenuBar *menubar)
 362 {
 363     Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 364     menu_entry_t *entry;
 365
 366     if (menu->selected == 0)
 367         return;
 368
 369     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 370
 371     menu->selected = 0;
 372
 373     while (TRUE) {
 374         entry = (menu_entry_t *) g_list_nth_data (menu->entries, menu->selected);
 375
 376         if ((entry == NULL) || (entry->command == CK_Ignore_Key))
 377             menu->selected++;
 378         else
 379             break;
 380     }
 381
 382     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 383 }
 384
 385 static void
 386 menubar_last (WMenuBar *menubar)
 387 {
 388     Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 389     const unsigned int len = g_list_length (menu->entries);
 390     menu_entry_t *entry;
 391
 392     if (menu->selected == len - 1)
 393         return;
 394
 395     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 396
 397     menu->selected = len;
 398
 399     do {
 400         menu->selected--;
 401         entry = (menu_entry_t *) g_list_nth_data (menu->entries, menu->selected);
 402     } while ((entry == NULL) || (entry->command == CK_Ignore_Key));
 403
 404     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 405 }
 406
 407 static int
 408 menubar_handle_key (WMenuBar *menubar, int key)
 409 {
 410     /* Lowercase */
 411     if (isascii (key))
 412         key = g_ascii_tolower (key);
 413
 414     if (is_abort_char (key)) {
 415         menubar_finish (menubar);
 416         return 1;
 417     }
 418
 419     /* menubar help or menubar navigation */
 420     switch (key) {
 421     case KEY_F(1):
 422         if (menubar->is_dropped)
 423             interactive_display (NULL,
 424                     ((Menu *) g_list_nth_data (menubar->menu,
 425                                         menubar->selected))->help_node);
 426         else
 427             interactive_display (NULL, "[Menu Bar]");
 428         menubar_draw (menubar);
 429         return 1;
 430
 431     case KEY_LEFT:
 432     case XCTRL('b'):
 433         menubar_left (menubar);
 434         return 1;
 435
 436     case KEY_RIGHT:
 437     case XCTRL ('f'):
 438         menubar_right (menubar);
 439         return 1;
 440     }
 441
 442     if (!menubar->is_dropped) {
 443         GList *i;
 444
 445         /* drop menu by hotkey */
 446         for (i = menubar->menu; i != NULL; i = g_list_next (i)) {
 447             Menu *menu = i->data;
 448
 449             if ((menu->text.hotkey != NULL)
 450                 && (key == g_ascii_tolower (menu->text.hotkey[0]))) {
 451                     menubar_drop (menubar, g_list_position (menubar->menu, i));
 452                     return 1;
 453             }
 454         }
 455
 456         /* drop menu by Enter or Dowwn key */
 457         if (key == KEY_ENTER || key == XCTRL ('n')
 458             || key == KEY_DOWN || key == '\n')
 459             menubar_drop (menubar, menubar->selected);
 460
 461         return 1;
 462     }
 463
 464     {
 465         Menu *menu = g_list_nth_data (menubar->menu, menubar->selected);
 466         GList *i;
 467
 468         /* execute menu command by hotkey */
 469         for (i = menu->entries; i != NULL; i = g_list_next (i)) {
 470             const menu_entry_t *entry = i->data;
 471
 472             if ((entry != NULL) && (entry->command != CK_Ignore_Key)
 473                 && (entry->text.hotkey != NULL)
 474                 && (key == g_ascii_tolower (entry->text.hotkey[0]))) {
 475                 menu->selected = g_list_position (menu->entries, i);
 476                 menubar_execute (menubar);
 477                 return 1;
 478             }
 479         }
 480
 481         /* menu execute by Enter or menu navigation */
 482         switch (key) {
 483         case KEY_ENTER:
 484         case '\n':
 485             menubar_execute (menubar);
 486             return 1;
 487
 488         case KEY_HOME:
 489         case ALT ('<'):
 490             menubar_first (menubar);
 491             break;
 492
 493         case KEY_END:
 494         case ALT ('>'):
 495             menubar_last (menubar);
 496             break;
 497
 498         case KEY_DOWN:
 499         case XCTRL ('n'):
 500             menubar_down (menubar);
 501             break;
 502
 503         case KEY_UP:
 504         case XCTRL ('p'):
 505             menubar_up (menubar);
 506             break;
 507         }
 508     }
 509
 510     return 0;
 511 }
 512
 513 static cb_ret_t
 514 menubar_callback (Widget *w, widget_msg_t msg, int parm)
 515 {
 516     WMenuBar *menubar = (WMenuBar *) w;
 517
 518     switch (msg) {
 519         /* We do not want the focus unless we have been activated */
 520     case WIDGET_FOCUS:
 521         if (!menubar->is_active)
 522             return MSG_NOT_HANDLED;
 523
 524         widget_want_cursor (menubar->widget, 1);
 525
 526         /* Trick to get all the mouse events */
 527         menubar->widget.lines = LINES;
 528
 529         /* Trick to get all of the hotkeys */
 530         widget_want_hotkey (menubar->widget, 1);
 531         menubar_draw (menubar);
 532         return MSG_HANDLED;
 533
 534         /* We don't want the buttonbar to activate while using the menubar */
 535     case WIDGET_HOTKEY:
 536     case WIDGET_KEY:
 537         if (menubar->is_active) {
 538             menubar_handle_key (menubar, parm);
 539             return MSG_HANDLED;
 540         }
 541         return MSG_NOT_HANDLED;
 542
 543     case WIDGET_CURSOR:
 544         /* Put the cursor in a suitable place */
 545         return MSG_NOT_HANDLED;
 546
 547     case WIDGET_UNFOCUS:
 548         if (menubar->is_active)
 549             return MSG_NOT_HANDLED;
 550
 551         widget_want_cursor (menubar->widget, 0);
 552         return MSG_HANDLED;
 553
 554     case WIDGET_DRAW:
 555         if (menubar_visible) {
 556             menubar_draw (menubar);
 557             return MSG_HANDLED;
 558         }
 559         /* fall through */
 560
 561     case WIDGET_RESIZED:
 562         /* try show menu after screen resize */
 563         send_message (w, WIDGET_FOCUS, 0);
 564         return MSG_HANDLED;
 565
 566
 567     case WIDGET_DESTROY:
 568         menubar_set_menu (menubar, NULL);
 569         return MSG_HANDLED;
 570
 571     default:
 572         return default_proc (msg, parm);
 573     }
 574 }
 575
 576 static int
 577 menubar_event (Gpm_Event *event, void *data)
 578 {
 579     WMenuBar *menubar = data;
 580     gboolean was_active = TRUE;
 581     int left_x, right_x, bottom_y;
 582     Menu *menu;
 583
 584     /* ignore unsupported events */
 585     if ((event->type & (GPM_UP | GPM_DOWN | GPM_DRAG)) == 0)
 586         return MOU_NORMAL;
 587
 588     /* ignore wheel events if menu is inactive */
 589     if (!menubar->is_active
 590             && ((event->buttons & (GPM_B_MIDDLE | GPM_B_UP | GPM_B_DOWN)) != 0))
 591         return MOU_NORMAL;
 592
 593     if (!menubar->is_dropped) {
 594         menubar->previous_widget = menubar->widget.parent->current->dlg_id;
 595         menubar->is_active = TRUE;
 596         menubar->is_dropped = TRUE;
 597         was_active = FALSE;
 598     }
 599
 600     /* Mouse operations on the menubar */
 601     if (event->y == 1 || !was_active) {
 602         if ((event->type & GPM_UP) != 0)
 603             return MOU_NORMAL;
 604
 605         /* wheel events on menubar */
 606         if (event->buttons & GPM_B_UP)
 607             menubar_left (menubar);
 608         else if (event->buttons & GPM_B_DOWN)
 609             menubar_right (menubar);
 610         else {
 611             const unsigned int len = g_list_length (menubar->menu);
 612             unsigned int new_selection = 0;
 613
 614             while ((new_selection < len)
 615                     && (event->x > ((Menu *) g_list_nth_data (menubar->menu,
 616                                                         new_selection))->start_x))
 617                 new_selection++;
 618
 619             if (new_selection != 0) /* Don't set the invalid value -1 */
 620                 new_selection--;
 621
 622             if (!was_active) {
 623                 menubar->selected = new_selection;
 624                 dlg_select_widget (menubar);
 625             } else {
 626                 menubar_remove (menubar);
 627                 menubar->selected = new_selection;
 628             }
 629             menubar_draw (menubar);
 630         }
 631         return MOU_NORMAL;
 632     }
 633
 634     if (!menubar->is_dropped || (event->y < 2))
 635         return MOU_NORMAL;
 636
 637     /* middle click -- everywhere */
 638     if (((event->buttons & GPM_B_MIDDLE) != 0)
 639             && ((event->type & GPM_DOWN) != 0)) {
 640         menubar_execute (menubar);
 641         return MOU_NORMAL;
 642     }
 643
 644     /* the mouse operation is on the menus or it is not */
 645     menu = (Menu *) g_list_nth_data (menubar->menu, menubar->selected);
 646     left_x = menu->start_x;
 647     right_x = left_x + menu->max_entry_len + 3;
 648     if (right_x > menubar->widget.cols) {
 649         left_x = menubar->widget.cols - menu->max_entry_len - 3;
 650         right_x = menubar->widget.cols;
 651     }
 652
 653     bottom_y = g_list_length (menu->entries) + 3;
 654
 655     if ((event->x >= left_x) && (event->x <= right_x) && (event->y <= bottom_y)){
 656         int pos = event->y - 3;
 657         const menu_entry_t *entry = g_list_nth_data (menu->entries, pos);
 658
 659         /* mouse wheel */
 660         if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN)) {
 661             menubar_up (menubar);
 662             return MOU_NORMAL;
 663         }
 664         if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN)) {
 665             menubar_down (menubar);
 666             return MOU_NORMAL;
 667         }
 668
 669         /* ignore events above and below dropped down menu */
 670         if  ((pos < 0) || (pos >= bottom_y - 3))
 671             return MOU_NORMAL;
 672
 673         if ((entry != NULL) && (entry->command != CK_Ignore_Key)) {
 674             menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 675             menu->selected = pos;
 676             menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 677
 678             if ((event->type & GPM_UP) != 0)
 679                 menubar_execute (menubar);
 680         }
 681     } else
 682         /* use click not wheel to close menu */
 683         if (((event->type & GPM_DOWN) != 0)
 684                  && ((event->buttons & (GPM_B_UP | GPM_B_DOWN)) == 0))
 685             menubar_finish (menubar);
 686
 687     return MOU_NORMAL;
 688 }
 689
 690 WMenuBar *
 691 menubar_new (int y, int x, int cols, GList *menu)
 692 {
 693     WMenuBar *menubar = g_new0 (WMenuBar, 1);
 694
 695     init_widget (&menubar->widget, y, x, 1, cols,
 696                  menubar_callback, menubar_event);
 697     widget_want_cursor (menubar->widget, 0);
 698     menubar_set_menu (menubar, menu);
 699     return menubar;
 700 }
 701
 702 void
 703 menubar_set_menu (WMenuBar *menubar, GList *menu)
 704 {
 705     /* delete previous menu */
 706     if (menubar->menu != NULL) {
 707         g_list_foreach (menubar->menu, (GFunc) destroy_menu, NULL);
 708         g_list_free (menubar->menu);
 709     }
 710     /* add new menu */
 711     menubar->is_active = FALSE;
 712     menubar->is_dropped = FALSE;
 713     menubar->menu = menu;
 714     menubar->selected = 0;
 715     menubar_arrange (menubar);
 716 }
 717
 718 void
 719 menubar_add_menu (WMenuBar *menubar, Menu *menu)
 720 {
 721     if (menu != NULL) {
 722         menu_arrange (menu, menubar->widget.parent->get_shortcut);
 723         menubar->menu = g_list_append (menubar->menu, menu);
 724     }
 725
 726     menubar_arrange (menubar);
 727 }
 728
 729 /*
 730  * Properly space menubar items. Should be called when menubar is created
 731  * and also when widget width is changed (i.e. upon xterm resize).
 732  */
 733 void
 734 menubar_arrange (WMenuBar* menubar)
 735 {
 736     int start_x = 1;
 737     GList *i;
 738     int gap;
 739
 740     if (menubar->menu == NULL)
 741         return;
 742
 743 #ifndef RESIZABLE_MENUBAR
 744     gap = 3;
 745
 746     for (i = menubar->menu; i != NULL; i = g_list_next (i)) {
 747         Menu *menu = i->data;
 748         int len = hotkey_width (menu->text) + 2;
 749
 750         menu->start_x = start_x;
 751         start_x += len + gap;
 752     }
 753 #else /* RESIZABLE_MENUBAR */
 754     gap = menubar->widget.cols - 2;
 755
 756     /* First, calculate gap between items... */
 757     for (i = menubar->menu; i != NULL; i = g_list_nwxt (i)) {
 758         Menu *menu = i->data;
 759         /* preserve length here, to be used below */
 760         menu->start_x = hotkey_width (menu->text) + 2;
 761         gap -= menu->start_x;
 762     }
 763
 764     gap /= (menubar->menu->len - 1);
 765
 766     if (gap <= 0) {
 767         /* We are out of luck - window is too narrow... */
 768         gap = 1;
 769     }
 770
 771     /* ...and now fix start positions of menubar items */
 772     for (i = menubar->menu; i != NULL; i = g_list_nwxt (i)) {
 773         Menu *menu = i->data;
 774         int len = menu->start_x;
 775
 776         menu->start_x = start_x;
 777         start_x += len + gap;
 778     }
 779 #endif /* RESIZABLE_MENUBAR */
 780 }
 781
 782 /* Find MenuBar widget in the dialog */
 783 WMenuBar *
 784 find_menubar (const Dlg_head *h)
 785 {
 786     return (WMenuBar *) find_widget_type (h, menubar_callback);
 787 }