lib/widget/menu.c

   1 /*
   2    Pulldown menu code
   3
   4    Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   5    2007, 2009, 2011, 2012
   6    The Free Software Foundation, Inc.
   7
   8    Written by:
   9    Andrew Borodin <aborodin@vmail.ru>, 2012
  10
  11    This file is part of the Midnight Commander.
  12
  13    The Midnight Commander is free software: you can redistribute it
  14    and/or modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation, either version 3 of the License,
  16    or (at your option) any later version.
  17
  18    The Midnight Commander is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 /** \file menu.c
  28  *  \brief Source: pulldown menu code
  29  */
  30
  31 #include <config.h>
  32
  33 #include <ctype.h>
  34 #include <stdarg.h>
  35 #include <string.h>
  36 #include <sys/types.h>
  37
  38 #include "lib/global.h"
  39
  40 #include "lib/tty/tty.h"
  41 #include "lib/skin.h"
  42 #include "lib/tty/mouse.h"
  43 #include "lib/tty/key.h"        /* key macros */
  44 #include "lib/strutil.h"
  45 #include "lib/widget.h"
  46 #include "lib/event.h"          /* mc_event_raise() */
  47
  48 /*** global variables ****************************************************************************/
  49
  50 /*** file scope macro definitions ****************************************************************/
  51
  52 #define MENUENTRY(x) ((menu_entry_t *)(x))
  53 #define MENU(x) ((menu_t *)(x))
  54
  55 /*** file scope type declarations ****************************************************************/
  56
  57 struct menu_entry_t
  58 {
  59     unsigned char first_letter;
  60     hotkey_t text;
  61     unsigned long command;
  62     char *shortcut;
  63 };
  64
  65 struct menu_t
  66 {
  67     int start_x;                /* position relative to menubar start */
  68     hotkey_t text;
  69     GList *entries;
  70     size_t max_entry_len;       /* cached max length of entry texts (text + shortcut) */
  71     size_t max_hotkey_len;      /* cached max length of shortcuts */
  72     unsigned int selected;      /* pointer to current menu entry */
  73     char *help_node;
  74 };
  75
  76 /*** file scope variables ************************************************************************/
  77
  78 /*** file scope functions ************************************************************************/
  79 /* --------------------------------------------------------------------------------------------- */
  80
  81 static void
  82 menu_arrange (menu_t * menu, dlg_shortcut_str get_shortcut)
  83 {
  84     if (menu != NULL)
  85     {
  86         GList *i;
  87         size_t max_shortcut_len = 0;
  88
  89         menu->max_entry_len = 1;
  90         menu->max_hotkey_len = 1;
  91
  92         for (i = menu->entries; i != NULL; i = g_list_next (i))
  93         {
  94             menu_entry_t *entry = MENUENTRY (i->data);
  95
  96             if (entry != NULL)
  97             {
  98                 size_t len;
  99
 100                 len = (size_t) hotkey_width (entry->text);
 101                 menu->max_hotkey_len = max (menu->max_hotkey_len, len);
 102
 103                 if (get_shortcut != NULL)
 104                     entry->shortcut = get_shortcut (entry->command);
 105
 106                 if (entry->shortcut != NULL)
 107                 {
 108                     len = (size_t) str_term_width1 (entry->shortcut);
 109                     max_shortcut_len = max (max_shortcut_len, len);
 110                 }
 111             }
 112         }
 113
 114         menu->max_entry_len = menu->max_hotkey_len + max_shortcut_len;
 115     }
 116 }
 117
 118 /* --------------------------------------------------------------------------------------------- */
 119
 120 static void
 121 menubar_paint_idx (WMenuBar * menubar, unsigned int idx, int color)
 122 {
 123     Widget *w = WIDGET (menubar);
 124     const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 125     const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, idx));
 126     const int y = 2 + idx;
 127     int x = menu->start_x;
 128
 129     if (x + menu->max_entry_len + 4 > (gsize) w->cols)
 130         x = w->cols - menu->max_entry_len - 4;
 131
 132     if (entry == NULL)
 133     {
 134         /* menu separator */
 135         tty_setcolor (MENU_ENTRY_COLOR);
 136
 137         widget_move (w, y, x - 1);
 138         tty_print_alt_char (ACS_LTEE, FALSE);
 139         tty_draw_hline (w->y + y, w->x + x, ACS_HLINE, menu->max_entry_len + 3);
 140         widget_move (w, y, x + menu->max_entry_len + 3);
 141         tty_print_alt_char (ACS_RTEE, FALSE);
 142     }
 143     else
 144     {
 145         int yt, xt;
 146
 147         /* menu text */
 148         tty_setcolor (color);
 149         widget_move (w, y, x);
 150         tty_print_char ((unsigned char) entry->first_letter);
 151         tty_getyx (&yt, &xt);
 152         tty_draw_hline (yt, xt, ' ', menu->max_entry_len + 2);  /* clear line */
 153         tty_print_string (entry->text.start);
 154
 155         if (entry->text.hotkey != NULL)
 156         {
 157             tty_setcolor (color == MENU_SELECTED_COLOR ? MENU_HOTSEL_COLOR : MENU_HOT_COLOR);
 158             tty_print_string (entry->text.hotkey);
 159             tty_setcolor (color);
 160         }
 161
 162         if (entry->text.end != NULL)
 163             tty_print_string (entry->text.end);
 164
 165         if (entry->shortcut != NULL)
 166         {
 167             widget_move (w, y, x + menu->max_hotkey_len + 3);
 168             tty_print_string (entry->shortcut);
 169         }
 170
 171         /* move cursor to the start of entry text */
 172         widget_move (w, y, x + 1);
 173     }
 174 }
 175
 176 /* --------------------------------------------------------------------------------------------- */
 177
 178 static void
 179 menubar_draw_drop (WMenuBar * menubar)
 180 {
 181     Widget *w = WIDGET (menubar);
 182     const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 183     const unsigned int count = g_list_length (menu->entries);
 184     int column = menu->start_x - 1;
 185     unsigned int i;
 186
 187     if (column + menu->max_entry_len + 5 > (gsize) w->cols)
 188         column = w->cols - menu->max_entry_len - 5;
 189
 190     tty_setcolor (MENU_ENTRY_COLOR);
 191     draw_box (w->owner, w->y + 1, w->x + column, count + 2, menu->max_entry_len + 5, FALSE);
 192
 193     for (i = 0; i < count; i++)
 194         menubar_paint_idx (menubar, i,
 195                            i == menu->selected ? MENU_SELECTED_COLOR : MENU_ENTRY_COLOR);
 196 }
 197
 198 /* --------------------------------------------------------------------------------------------- */
 199
 200 static void
 201 menubar_set_color (WMenuBar * menubar, gboolean current, gboolean hotkey)
 202 {
 203     if (!menubar->is_active)
 204         tty_setcolor (MENU_INACTIVE_COLOR);
 205     else if (current)
 206         tty_setcolor (hotkey ? MENU_HOTSEL_COLOR : MENU_SELECTED_COLOR);
 207     else
 208         tty_setcolor (hotkey ? MENU_HOT_COLOR : MENU_ENTRY_COLOR);
 209 }
 210
 211 /* --------------------------------------------------------------------------------------------- */
 212
 213 static void
 214 menubar_draw (WMenuBar * menubar)
 215 {
 216     Widget *w = WIDGET (menubar);
 217     GList *i;
 218
 219     /* First draw the complete menubar */
 220     tty_setcolor (menubar->is_active ? MENU_ENTRY_COLOR : MENU_INACTIVE_COLOR);
 221     tty_draw_hline (w->y, w->x, ' ', w->cols);
 222
 223     /* Now each one of the entries */
 224     for (i = menubar->menu; i != NULL; i = g_list_next (i))
 225     {
 226         menu_t *menu = MENU (i->data);
 227         gboolean is_selected = (menubar->selected == (gsize) g_list_position (menubar->menu, i));
 228
 229         menubar_set_color (menubar, is_selected, FALSE);
 230         widget_move (w, 0, menu->start_x);
 231
 232         tty_print_char (' ');
 233         tty_print_string (menu->text.start);
 234
 235         if (menu->text.hotkey != NULL)
 236         {
 237             menubar_set_color (menubar, is_selected, TRUE);
 238             tty_print_string (menu->text.hotkey);
 239             menubar_set_color (menubar, is_selected, FALSE);
 240         }
 241
 242         if (menu->text.end != NULL)
 243             tty_print_string (menu->text.end);
 244
 245         tty_print_char (' ');
 246     }
 247
 248     if (menubar->is_dropped)
 249         menubar_draw_drop (menubar);
 250     else
 251         widget_move (w, 0, MENU (g_list_nth_data (menubar->menu, menubar->selected))->start_x);
 252 }
 253
 254 /* --------------------------------------------------------------------------------------------- */
 255
 256 static void
 257 menubar_remove (WMenuBar * menubar)
 258 {
 259     WDialog *h;
 260
 261     if (!menubar->is_dropped)
 262         return;
 263
 264     /* HACK: before refresh the dialog, change the current widget to keep the order
 265        of overlapped widgets. This is useful in multi-window editor.
 266        In general, menubar should be a special object, not an ordinary widget
 267        in the current dialog. */
 268     h = WIDGET (menubar)->owner;
 269     h->current = g_list_find (h->widgets, dlg_find_by_id (h, menubar->previous_widget));
 270
 271     menubar->is_dropped = FALSE;
 272     do_refresh ();
 273     menubar->is_dropped = TRUE;
 274
 275     /* restore current widget */
 276     h->current = g_list_find (h->widgets, menubar);
 277 }
 278
 279 /* --------------------------------------------------------------------------------------------- */
 280
 281 static void
 282 menubar_left (WMenuBar * menubar)
 283 {
 284     menubar_remove (menubar);
 285     if (menubar->selected == 0)
 286         menubar->selected = g_list_length (menubar->menu) - 1;
 287     else
 288         menubar->selected--;
 289     menubar_draw (menubar);
 290 }
 291
 292 /* --------------------------------------------------------------------------------------------- */
 293
 294 static void
 295 menubar_right (WMenuBar * menubar)
 296 {
 297     menubar_remove (menubar);
 298     menubar->selected = (menubar->selected + 1) % g_list_length (menubar->menu);
 299     menubar_draw (menubar);
 300 }
 301
 302 /* --------------------------------------------------------------------------------------------- */
 303
 304 static void
 305 menubar_finish (WMenuBar * menubar)
 306 {
 307     Widget *w = WIDGET (menubar);
 308
 309     menubar->is_dropped = FALSE;
 310     menubar->is_active = FALSE;
 311     w->lines = 1;
 312     widget_want_hotkey (w, 0);
 313
 314     dlg_select_by_id (w->owner, menubar->previous_widget);
 315     do_refresh ();
 316 }
 317
 318 /* --------------------------------------------------------------------------------------------- */
 319
 320 static void
 321 menubar_drop (WMenuBar * menubar, unsigned int selected)
 322 {
 323     menubar->is_dropped = TRUE;
 324     menubar->selected = selected;
 325     menubar_draw (menubar);
 326 }
 327
 328 /* --------------------------------------------------------------------------------------------- */
 329
 330 static void
 331 menubar_execute (WMenuBar * menubar)
 332 {
 333     const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 334     const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
 335
 336     if ((entry != NULL) && (entry->command != CK_IgnoreKey))
 337     {
 338         Widget *w = WIDGET (menubar);
 339
 340         mc_global.widget.is_right = (menubar->selected != 0);
 341         menubar_finish (menubar);
 342         send_message (w->owner, w, MSG_ACTION, entry->command, NULL);
 343         do_refresh ();
 344     }
 345 }
 346
 347 /* --------------------------------------------------------------------------------------------- */
 348
 349 static void
 350 menubar_down (WMenuBar * menubar)
 351 {
 352     menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 353     const unsigned int len = g_list_length (menu->entries);
 354     menu_entry_t *entry;
 355
 356     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 357
 358     do
 359     {
 360         menu->selected = (menu->selected + 1) % len;
 361         entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
 362     }
 363     while ((entry == NULL) || (entry->command == CK_IgnoreKey));
 364
 365     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 366 }
 367
 368 /* --------------------------------------------------------------------------------------------- */
 369
 370 static void
 371 menubar_up (WMenuBar * menubar)
 372 {
 373     menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 374     const unsigned int len = g_list_length (menu->entries);
 375     menu_entry_t *entry;
 376
 377     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 378
 379     do
 380     {
 381         if (menu->selected == 0)
 382             menu->selected = len - 1;
 383         else
 384             menu->selected--;
 385         entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
 386     }
 387     while ((entry == NULL) || (entry->command == CK_IgnoreKey));
 388
 389     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 390 }
 391
 392 /* --------------------------------------------------------------------------------------------- */
 393
 394 static void
 395 menubar_first (WMenuBar * menubar)
 396 {
 397     menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 398     menu_entry_t *entry;
 399
 400     if (menu->selected == 0)
 401         return;
 402
 403     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 404
 405     menu->selected = 0;
 406
 407     while (TRUE)
 408     {
 409         entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
 410
 411         if ((entry == NULL) || (entry->command == CK_IgnoreKey))
 412             menu->selected++;
 413         else
 414             break;
 415     }
 416
 417     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 418 }
 419
 420 /* --------------------------------------------------------------------------------------------- */
 421
 422 static void
 423 menubar_last (WMenuBar * menubar)
 424 {
 425     menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 426     const unsigned int len = g_list_length (menu->entries);
 427     menu_entry_t *entry;
 428
 429     if (menu->selected == len - 1)
 430         return;
 431
 432     menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 433
 434     menu->selected = len;
 435
 436     do
 437     {
 438         menu->selected--;
 439         entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
 440     }
 441     while ((entry == NULL) || (entry->command == CK_IgnoreKey));
 442
 443     menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 444 }
 445
 446 /* --------------------------------------------------------------------------------------------- */
 447
 448 static int
 449 menubar_handle_key (WMenuBar * menubar, int key)
 450 {
 451     /* Lowercase */
 452     if (isascii (key))
 453         key = g_ascii_tolower (key);
 454
 455     if (is_abort_char (key))
 456     {
 457         menubar_finish (menubar);
 458         return 1;
 459     }
 460
 461     /* menubar help or menubar navigation */
 462     switch (key)
 463     {
 464     case KEY_F (1):
 465         {
 466             ev_help_t event_data = { NULL, NULL };
 467
 468             if (menubar->is_dropped)
 469                 event_data.node =
 470                     MENU (g_list_nth_data (menubar->menu, menubar->selected))->help_node;
 471             else
 472                 event_data.node = "[Menu Bar]";
 473
 474             mc_event_raise (MCEVENT_GROUP_CORE, "help", &event_data);
 475             menubar_draw (menubar);
 476             return 1;
 477         }
 478     case KEY_LEFT:
 479     case XCTRL ('b'):
 480         menubar_left (menubar);
 481         return 1;
 482
 483     case KEY_RIGHT:
 484     case XCTRL ('f'):
 485         menubar_right (menubar);
 486         return 1;
 487     }
 488
 489     if (!menubar->is_dropped)
 490     {
 491         GList *i;
 492
 493         /* drop menu by hotkey */
 494         for (i = menubar->menu; i != NULL; i = g_list_next (i))
 495         {
 496             menu_t *menu = MENU (i->data);
 497
 498             if ((menu->text.hotkey != NULL) && (key == g_ascii_tolower (menu->text.hotkey[0])))
 499             {
 500                 menubar_drop (menubar, g_list_position (menubar->menu, i));
 501                 return 1;
 502             }
 503         }
 504
 505         /* drop menu by Enter or Dowwn key */
 506         if (key == KEY_ENTER || key == XCTRL ('n') || key == KEY_DOWN || key == '\n')
 507             menubar_drop (menubar, menubar->selected);
 508
 509         return 1;
 510     }
 511
 512     {
 513         menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 514         GList *i;
 515
 516         /* execute menu command by hotkey */
 517         for (i = menu->entries; i != NULL; i = g_list_next (i))
 518         {
 519             const menu_entry_t *entry = MENUENTRY (i->data);
 520
 521             if ((entry != NULL) && (entry->command != CK_IgnoreKey)
 522                 && (entry->text.hotkey != NULL) && (key == g_ascii_tolower (entry->text.hotkey[0])))
 523             {
 524                 menu->selected = g_list_position (menu->entries, i);
 525                 menubar_execute (menubar);
 526                 return 1;
 527             }
 528         }
 529
 530         /* menu execute by Enter or menu navigation */
 531         switch (key)
 532         {
 533         case KEY_ENTER:
 534         case '\n':
 535             menubar_execute (menubar);
 536             return 1;
 537
 538         case KEY_HOME:
 539         case ALT ('<'):
 540             menubar_first (menubar);
 541             break;
 542
 543         case KEY_END:
 544         case ALT ('>'):
 545             menubar_last (menubar);
 546             break;
 547
 548         case KEY_DOWN:
 549         case XCTRL ('n'):
 550             menubar_down (menubar);
 551             break;
 552
 553         case KEY_UP:
 554         case XCTRL ('p'):
 555             menubar_up (menubar);
 556             break;
 557         }
 558     }
 559
 560     return 0;
 561 }
 562
 563 /* --------------------------------------------------------------------------------------------- */
 564
 565 static cb_ret_t
 566 menubar_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
 567 {
 568     WMenuBar *menubar = MENUBAR (w);
 569
 570     switch (msg)
 571     {
 572         /* We do not want the focus unless we have been activated */
 573     case MSG_FOCUS:
 574         if (!menubar->is_active)
 575             return MSG_NOT_HANDLED;
 576
 577         /* Trick to get all the mouse events */
 578         w->lines = LINES;
 579
 580         /* Trick to get all of the hotkeys */
 581         widget_want_hotkey (w, 1);
 582         menubar_draw (menubar);
 583         return MSG_HANDLED;
 584
 585         /* We don't want the buttonbar to activate while using the menubar */
 586     case MSG_HOTKEY:
 587     case MSG_KEY:
 588         if (menubar->is_active)
 589         {
 590             menubar_handle_key (menubar, parm);
 591             return MSG_HANDLED;
 592         }
 593         return MSG_NOT_HANDLED;
 594
 595     case MSG_CURSOR:
 596         /* Put the cursor in a suitable place */
 597         return MSG_NOT_HANDLED;
 598
 599     case MSG_UNFOCUS:
 600         return menubar->is_active ? MSG_NOT_HANDLED : MSG_HANDLED;
 601
 602     case MSG_DRAW:
 603         if (menubar->is_visible)
 604         {
 605             menubar_draw (menubar);
 606             return MSG_HANDLED;
 607         }
 608         /* fall through */
 609
 610     case MSG_RESIZE:
 611         /* try show menu after screen resize */
 612         send_message (w, sender, MSG_FOCUS, 0, data);
 613         return MSG_HANDLED;
 614
 615
 616     case MSG_DESTROY:
 617         menubar_set_menu (menubar, NULL);
 618         return MSG_HANDLED;
 619
 620     default:
 621         return widget_default_callback (w, sender, msg, parm, data);
 622     }
 623 }
 624
 625 /* --------------------------------------------------------------------------------------------- */
 626
 627 static int
 628 menubar_event (Gpm_Event * event, void *data)
 629 {
 630     WMenuBar *menubar = MENUBAR (data);
 631     Widget *w = WIDGET (data);
 632     gboolean was_active = TRUE;
 633     int left_x, right_x, bottom_y;
 634     menu_t *menu;
 635     Gpm_Event local;
 636
 637     if (!mouse_global_in_widget (event, w))
 638         return MOU_UNHANDLED;
 639
 640     /* ignore unsupported events */
 641     if ((event->type & (GPM_UP | GPM_DOWN | GPM_DRAG)) == 0)
 642         return MOU_NORMAL;
 643
 644     /* ignore wheel events if menu is inactive */
 645     if (!menubar->is_active && ((event->buttons & (GPM_B_MIDDLE | GPM_B_UP | GPM_B_DOWN)) != 0))
 646         return MOU_NORMAL;
 647
 648     local = mouse_get_local (event, w);
 649
 650     if (local.y == 1 && (local.type & GPM_UP) != 0)
 651         return MOU_NORMAL;
 652
 653     if (!menubar->is_dropped)
 654     {
 655         menubar->previous_widget = dlg_get_current_widget_id (w->owner);
 656         menubar->is_active = TRUE;
 657         menubar->is_dropped = TRUE;
 658         was_active = FALSE;
 659     }
 660
 661     /* Mouse operations on the menubar */
 662     if (local.y == 1 || !was_active)
 663     {
 664         /* wheel events on menubar */
 665         if ((local.buttons & GPM_B_UP) != 0)
 666             menubar_left (menubar);
 667         else if ((local.buttons & GPM_B_DOWN) != 0)
 668             menubar_right (menubar);
 669         else
 670         {
 671             const unsigned int len = g_list_length (menubar->menu);
 672             unsigned int new_selection = 0;
 673
 674             while ((new_selection < len)
 675                    && (local.x > MENU (g_list_nth_data (menubar->menu, new_selection))->start_x))
 676                 new_selection++;
 677
 678             if (new_selection != 0)     /* Don't set the invalid value -1 */
 679                 new_selection--;
 680
 681             if (!was_active)
 682             {
 683                 menubar->selected = new_selection;
 684                 dlg_select_widget (menubar);
 685             }
 686             else
 687             {
 688                 menubar_remove (menubar);
 689                 menubar->selected = new_selection;
 690             }
 691             menubar_draw (menubar);
 692         }
 693         return MOU_NORMAL;
 694     }
 695
 696     if (!menubar->is_dropped || (local.y < 2))
 697         return MOU_NORMAL;
 698
 699     /* middle click -- everywhere */
 700     if (((local.buttons & GPM_B_MIDDLE) != 0) && ((local.type & GPM_DOWN) != 0))
 701     {
 702         menubar_execute (menubar);
 703         return MOU_NORMAL;
 704     }
 705
 706     /* the mouse operation is on the menus or it is not */
 707     menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
 708     left_x = menu->start_x;
 709     right_x = left_x + menu->max_entry_len + 3;
 710     if (right_x > w->cols)
 711     {
 712         left_x = w->cols - menu->max_entry_len - 3;
 713         right_x = w->cols;
 714     }
 715
 716     bottom_y = g_list_length (menu->entries) + 3;
 717
 718     if ((local.x >= left_x) && (local.x <= right_x) && (local.y <= bottom_y))
 719     {
 720         int pos = local.y - 3;
 721         const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, pos));
 722
 723         /* mouse wheel */
 724         if ((local.buttons & GPM_B_UP) != 0 && (local.type & GPM_DOWN) != 0)
 725         {
 726             menubar_up (menubar);
 727             return MOU_NORMAL;
 728         }
 729         if ((local.buttons & GPM_B_DOWN) != 0 && (local.type & GPM_DOWN) != 0)
 730         {
 731             menubar_down (menubar);
 732             return MOU_NORMAL;
 733         }
 734
 735         /* ignore events above and below dropped down menu */
 736         if ((pos < 0) || (pos >= bottom_y - 3))
 737             return MOU_NORMAL;
 738
 739         if ((entry != NULL) && (entry->command != CK_IgnoreKey))
 740         {
 741             menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
 742             menu->selected = pos;
 743             menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
 744
 745             if ((event->type & GPM_UP) != 0)
 746                 menubar_execute (menubar);
 747         }
 748     }
 749     else if (((local.type & GPM_DOWN) != 0) && ((local.buttons & (GPM_B_UP | GPM_B_DOWN)) == 0))
 750     {
 751         /* use click not wheel to close menu */
 752         menubar_finish (menubar);
 753     }
 754
 755     return MOU_NORMAL;
 756 }
 757
 758 /* --------------------------------------------------------------------------------------------- */
 759 /*** public functions ****************************************************************************/
 760 /* --------------------------------------------------------------------------------------------- */
 761
 762 menu_entry_t *
 763 menu_entry_create (const char *name, unsigned long command)
 764 {
 765     menu_entry_t *entry;
 766
 767     entry = g_new (menu_entry_t, 1);
 768     entry->first_letter = ' ';
 769     entry->text = parse_hotkey (name);
 770     entry->command = command;
 771     entry->shortcut = NULL;
 772
 773     return entry;
 774 }
 775
 776 /* --------------------------------------------------------------------------------------------- */
 777
 778 void
 779 menu_entry_free (menu_entry_t * entry)
 780 {
 781     if (entry != NULL)
 782     {
 783         release_hotkey (entry->text);
 784         g_free (entry->shortcut);
 785         g_free (entry);
 786     }
 787 }
 788
 789 /* --------------------------------------------------------------------------------------------- */
 790
 791 menu_t *
 792 create_menu (const char *name, GList * entries, const char *help_node)
 793 {
 794     menu_t *menu;
 795
 796     menu = g_new (menu_t, 1);
 797     menu->start_x = 0;
 798     menu->text = parse_hotkey (name);
 799     menu->entries = entries;
 800     menu->max_entry_len = 1;
 801     menu->max_hotkey_len = 0;
 802     menu->selected = 0;
 803     menu->help_node = g_strdup (help_node);
 804
 805     return menu;
 806 }
 807
 808 /* --------------------------------------------------------------------------------------------- */
 809
 810 void
 811 menu_set_name (menu_t * menu, const char *name)
 812 {
 813     release_hotkey (menu->text);
 814     menu->text = parse_hotkey (name);
 815 }
 816
 817 /* --------------------------------------------------------------------------------------------- */
 818
 819 void
 820 destroy_menu (menu_t * menu)
 821 {
 822     release_hotkey (menu->text);
 823     g_list_foreach (menu->entries, (GFunc) menu_entry_free, NULL);
 824     g_list_free (menu->entries);
 825     g_free (menu->help_node);
 826     g_free (menu);
 827 }
 828
 829 /* --------------------------------------------------------------------------------------------- */
 830
 831 WMenuBar *
 832 menubar_new (int y, int x, int cols, GList * menu)
 833 {
 834     WMenuBar *menubar;
 835     Widget *w;
 836
 837     menubar = g_new0 (WMenuBar, 1);
 838     w = WIDGET (menubar);
 839     init_widget (w, y, x, 1, cols, menubar_callback, menubar_event);
 840
 841     menubar->is_visible = TRUE; /* by default */
 842     widget_want_cursor (w, FALSE);
 843     menubar_set_menu (menubar, menu);
 844
 845     return menubar;
 846 }
 847
 848 /* --------------------------------------------------------------------------------------------- */
 849
 850 void
 851 menubar_set_menu (WMenuBar * menubar, GList * menu)
 852 {
 853     /* delete previous menu */
 854     if (menubar->menu != NULL)
 855     {
 856         g_list_foreach (menubar->menu, (GFunc) destroy_menu, NULL);
 857         g_list_free (menubar->menu);
 858     }
 859     /* add new menu */
 860     menubar->is_active = FALSE;
 861     menubar->is_dropped = FALSE;
 862     menubar->menu = menu;
 863     menubar->selected = 0;
 864     menubar_arrange (menubar);
 865 }
 866
 867 /* --------------------------------------------------------------------------------------------- */
 868
 869 void
 870 menubar_add_menu (WMenuBar * menubar, menu_t * menu)
 871 {
 872     if (menu != NULL)
 873     {
 874         menu_arrange (menu, WIDGET (menubar)->owner->get_shortcut);
 875         menubar->menu = g_list_append (menubar->menu, menu);
 876     }
 877
 878     menubar_arrange (menubar);
 879 }
 880
 881 /* --------------------------------------------------------------------------------------------- */
 882 /**
 883  * Properly space menubar items. Should be called when menubar is created
 884  * and also when widget width is changed (i.e. upon xterm resize).
 885  */
 886
 887 void
 888 menubar_arrange (WMenuBar * menubar)
 889 {
 890     int start_x = 1;
 891     GList *i;
 892     int gap;
 893
 894     if (menubar->menu == NULL)
 895         return;
 896
 897     gap = WIDGET (menubar)->cols - 2;
 898
 899     /* First, calculate gap between items... */
 900     for (i = menubar->menu; i != NULL; i = g_list_next (i))
 901     {
 902         menu_t *menu = MENU (i->data);
 903
 904         /* preserve length here, to be used below */
 905         menu->start_x = hotkey_width (menu->text) + 2;
 906         gap -= menu->start_x;
 907     }
 908
 909     if (g_list_next (menubar->menu) == NULL)
 910         gap = 1;
 911     else
 912         gap /= (g_list_length (menubar->menu) - 1);
 913
 914     if (gap <= 0)
 915     {
 916         /* We are out of luck - window is too narrow... */
 917         gap = 1;
 918     }
 919     else if (gap >= 3)
 920         gap = 3;
 921
 922     /* ...and now fix start positions of menubar items */
 923     for (i = menubar->menu; i != NULL; i = g_list_next (i))
 924     {
 925         menu_t *menu = MENU (i->data);
 926         int len = menu->start_x;
 927
 928         menu->start_x = start_x;
 929         start_x += len + gap;
 930     }
 931 }
 932
 933 /* --------------------------------------------------------------------------------------------- */
 934 /** Find MenuBar widget in the dialog */
 935
 936 WMenuBar *
 937 find_menubar (const WDialog * h)
 938 {
 939     return MENUBAR (find_widget_type (h, menubar_callback));
 940 }
 941
 942 /* --------------------------------------------------------------------------------------------- */