Pileus Git - ~andy/gtk/blob - gtk/gtkmenuitem.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library 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 GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #define GTK_MENU_INTERNALS
  28
  29 #include <config.h>
  30 #include <string.h>
  31
  32 #include "gtkaccellabel.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtkmenu.h"
  36 #include "gtkmenubar.h"
  37 #include "gtkmenuitem.h"
  38 #include "gtkseparatormenuitem.h"
  39 #include "gtkprivate.h"
  40 #include "gtkintl.h"
  41 #include "gtkalias.h"
  42
  43 #define MENU_ITEM_CLASS(w)  GTK_MENU_ITEM_CLASS (GTK_OBJECT (w)->klass)
  44
  45 enum {
  46   ACTIVATE,
  47   ACTIVATE_ITEM,
  48   TOGGLE_SIZE_REQUEST,
  49   TOGGLE_SIZE_ALLOCATE,
  50   LAST_SIGNAL
  51 };
  52
  53
  54 static void gtk_menu_item_destroy        (GtkObject        *object);
  55 static void gtk_menu_item_finalize       (GObject          *object);
  56 static void gtk_menu_item_size_request   (GtkWidget        *widget,
  57                                           GtkRequisition   *requisition);
  58 static void gtk_menu_item_size_allocate  (GtkWidget        *widget,
  59                                           GtkAllocation    *allocation);
  60 static void gtk_menu_item_realize        (GtkWidget        *widget);
  61 static void gtk_menu_item_unrealize      (GtkWidget        *widget);
  62 static void gtk_menu_item_map            (GtkWidget        *widget);
  63 static void gtk_menu_item_unmap          (GtkWidget        *widget);
  64 static void gtk_menu_item_paint          (GtkWidget        *widget,
  65                                           GdkRectangle     *area);
  66 static gint gtk_menu_item_expose         (GtkWidget        *widget,
  67                                           GdkEventExpose   *event);
  68 static void gtk_menu_item_parent_set     (GtkWidget        *widget,
  69                                           GtkWidget        *previous_parent);
  70
  71
  72 static void gtk_real_menu_item_select               (GtkItem     *item);
  73 static void gtk_real_menu_item_deselect             (GtkItem     *item);
  74 static void gtk_real_menu_item_activate_item        (GtkMenuItem *item);
  75 static void gtk_real_menu_item_toggle_size_request  (GtkMenuItem *menu_item,
  76                                                      gint        *requisition);
  77 static void gtk_real_menu_item_toggle_size_allocate (GtkMenuItem *menu_item,
  78                                                      gint         allocation);
  79 static gboolean gtk_menu_item_mnemonic_activate     (GtkWidget   *widget,
  80                                                      gboolean     group_cycling);
  81
  82 static gint gtk_menu_item_select_timeout (gpointer          data);
  83 static void gtk_menu_item_position_menu  (GtkMenu          *menu,
  84                                           gint             *x,
  85                                           gint             *y,
  86                                           gboolean         *push_in,
  87                                           gpointer          user_data);
  88 static void gtk_menu_item_show_all       (GtkWidget        *widget);
  89 static void gtk_menu_item_hide_all       (GtkWidget        *widget);
  90 static void gtk_menu_item_forall         (GtkContainer    *container,
  91                                           gboolean         include_internals,
  92                                           GtkCallback      callback,
  93                                           gpointer         callback_data);
  94 static gboolean gtk_menu_item_can_activate_accel (GtkWidget *widget,
  95                                                   guint      signal_id);
  96
  97
  98 static guint menu_item_signals[LAST_SIGNAL] = { 0 };
  99
 100 G_DEFINE_TYPE (GtkMenuItem, gtk_menu_item, GTK_TYPE_ITEM)
 101
 102 static void
 103 gtk_menu_item_class_init (GtkMenuItemClass *klass)
 104 {
 105   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 106   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
 107   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 108   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 109   GtkItemClass *item_class = GTK_ITEM_CLASS (klass);
 110
 111   gobject_class->finalize = gtk_menu_item_finalize;
 112
 113   object_class->destroy = gtk_menu_item_destroy;
 114
 115   widget_class->size_request = gtk_menu_item_size_request;
 116   widget_class->size_allocate = gtk_menu_item_size_allocate;
 117   widget_class->expose_event = gtk_menu_item_expose;
 118   widget_class->realize = gtk_menu_item_realize;
 119   widget_class->unrealize = gtk_menu_item_unrealize;
 120   widget_class->map = gtk_menu_item_map;
 121   widget_class->unmap = gtk_menu_item_unmap;
 122   widget_class->show_all = gtk_menu_item_show_all;
 123   widget_class->hide_all = gtk_menu_item_hide_all;
 124   widget_class->mnemonic_activate = gtk_menu_item_mnemonic_activate;
 125   widget_class->parent_set = gtk_menu_item_parent_set;
 126   widget_class->can_activate_accel = gtk_menu_item_can_activate_accel;
 127
 128   container_class->forall = gtk_menu_item_forall;
 129
 130   item_class->select = gtk_real_menu_item_select;
 131   item_class->deselect = gtk_real_menu_item_deselect;
 132
 133   klass->activate = NULL;
 134   klass->activate_item = gtk_real_menu_item_activate_item;
 135   klass->toggle_size_request = gtk_real_menu_item_toggle_size_request;
 136   klass->toggle_size_allocate = gtk_real_menu_item_toggle_size_allocate;
 137
 138   klass->hide_on_activate = TRUE;
 139
 140   menu_item_signals[ACTIVATE] =
 141     g_signal_new (I_("activate"),
 142                   G_OBJECT_CLASS_TYPE (gobject_class),
 143                   G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
 144                   G_STRUCT_OFFSET (GtkMenuItemClass, activate),
 145                   NULL, NULL,
 146                   _gtk_marshal_VOID__VOID,
 147                   G_TYPE_NONE, 0);
 148   widget_class->activate_signal = menu_item_signals[ACTIVATE];
 149
 150   menu_item_signals[ACTIVATE_ITEM] =
 151     g_signal_new (I_("activate_item"),
 152                   G_OBJECT_CLASS_TYPE (gobject_class),
 153                   G_SIGNAL_RUN_FIRST,
 154                   G_STRUCT_OFFSET (GtkMenuItemClass, activate_item),
 155                   NULL, NULL,
 156                   _gtk_marshal_VOID__VOID,
 157                   G_TYPE_NONE, 0);
 158
 159   menu_item_signals[TOGGLE_SIZE_REQUEST] =
 160     g_signal_new (I_("toggle_size_request"),
 161                   G_OBJECT_CLASS_TYPE (gobject_class),
 162                   G_SIGNAL_RUN_FIRST,
 163                   G_STRUCT_OFFSET (GtkMenuItemClass, toggle_size_request),
 164                   NULL, NULL,
 165                   _gtk_marshal_VOID__POINTER,
 166                   G_TYPE_NONE, 1,
 167                   G_TYPE_POINTER);
 168
 169   menu_item_signals[TOGGLE_SIZE_ALLOCATE] =
 170     g_signal_new (I_("toggle_size_allocate"),
 171                   G_OBJECT_CLASS_TYPE (gobject_class),
 172                   G_SIGNAL_RUN_FIRST,
 173                   G_STRUCT_OFFSET (GtkMenuItemClass, toggle_size_allocate),
 174                   NULL, NULL,
 175                   _gtk_marshal_NONE__INT,
 176                   G_TYPE_NONE, 1,
 177                   G_TYPE_INT);
 178
 179   gtk_widget_class_install_style_property_parser (widget_class,
 180                                                   g_param_spec_enum ("selected-shadow-type",
 181                                                                      "Selected Shadow Type",
 182                                                                      "Shadow type when item is selected",
 183                                                                      GTK_TYPE_SHADOW_TYPE,
 184                                                                      GTK_SHADOW_NONE,
 185                                                                      GTK_PARAM_READABLE),
 186                                                   gtk_rc_property_parse_enum);
 187
 188   gtk_widget_class_install_style_property (widget_class,
 189                                            g_param_spec_int ("horizontal-padding",
 190                                                              "Horizontal Padding",
 191                                                              "Padding to left and right of the menu item",
 192                                                              0,
 193                                                              G_MAXINT,
 194                                                              3,
 195                                                              GTK_PARAM_READABLE));
 196
 197   gtk_widget_class_install_style_property (widget_class,
 198                                            g_param_spec_int ("toggle-spacing",
 199                                                              "Icon Spacing",
 200                                                              "Space between icon and label",
 201                                                              0,
 202                                                              G_MAXINT,
 203                                                              5,
 204                                                              GTK_PARAM_READABLE));
 205
 206   gtk_widget_class_install_style_property (widget_class,
 207                                            g_param_spec_int ("arrow-spacing",
 208                                                              "Arrow Spacing",
 209                                                              "Space between label and arrow",
 210                                                              0,
 211                                                              G_MAXINT,
 212                                                              10,
 213                                                              GTK_PARAM_READABLE));
 214 }
 215
 216 static void
 217 gtk_menu_item_init (GtkMenuItem *menu_item)
 218 {
 219   GTK_WIDGET_SET_FLAGS (menu_item, GTK_NO_WINDOW);
 220
 221   menu_item->submenu = NULL;
 222   menu_item->toggle_size = 0;
 223   menu_item->accelerator_width = 0;
 224   menu_item->show_submenu_indicator = FALSE;
 225   if (gtk_widget_get_direction (GTK_WIDGET (menu_item)) == GTK_TEXT_DIR_RTL)
 226     menu_item->submenu_direction = GTK_DIRECTION_LEFT;
 227   else
 228     menu_item->submenu_direction = GTK_DIRECTION_RIGHT;
 229   menu_item->submenu_placement = GTK_TOP_BOTTOM;
 230   menu_item->right_justify = FALSE;
 231
 232   menu_item->timer = 0;
 233 }
 234
 235 GtkWidget*
 236 gtk_menu_item_new (void)
 237 {
 238   return g_object_new (GTK_TYPE_MENU_ITEM, NULL);
 239 }
 240
 241 GtkWidget*
 242 gtk_menu_item_new_with_label (const gchar *label)
 243 {
 244   GtkWidget *menu_item;
 245   GtkWidget *accel_label;
 246
 247   menu_item = gtk_menu_item_new ();
 248   accel_label = gtk_accel_label_new (label);
 249   gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
 250
 251   gtk_container_add (GTK_CONTAINER (menu_item), accel_label);
 252   gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (accel_label), menu_item);
 253   gtk_widget_show (accel_label);
 254
 255   return menu_item;
 256 }
 257
 258
 259 /**
 260  * gtk_menu_item_new_with_mnemonic:
 261  * @label: The text of the button, with an underscore in front of the
 262  *         mnemonic character
 263  * @returns: a new #GtkMenuItem
 264  *
 265  * Creates a new #GtkMenuItem containing a label. The label
 266  * will be created using gtk_label_new_with_mnemonic(), so underscores
 267  * in @label indicate the mnemonic for the menu item.
 268  **/
 269 GtkWidget*
 270 gtk_menu_item_new_with_mnemonic (const gchar *label)
 271 {
 272   GtkWidget *menu_item;
 273   GtkWidget *accel_label;
 274
 275   menu_item = gtk_menu_item_new ();
 276   accel_label = g_object_new (GTK_TYPE_ACCEL_LABEL, NULL);
 277   gtk_label_set_text_with_mnemonic (GTK_LABEL (accel_label), label);
 278   gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
 279
 280   gtk_container_add (GTK_CONTAINER (menu_item), accel_label);
 281   gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (accel_label), menu_item);
 282   gtk_widget_show (accel_label);
 283
 284   return menu_item;
 285 }
 286
 287 static void
 288 gtk_menu_item_destroy (GtkObject *object)
 289 {
 290   GtkMenuItem *menu_item;
 291
 292   g_return_if_fail (GTK_IS_MENU_ITEM (object));
 293
 294   menu_item = GTK_MENU_ITEM (object);
 295
 296   if (menu_item->submenu)
 297     gtk_widget_destroy (menu_item->submenu);
 298
 299   GTK_OBJECT_CLASS (gtk_menu_item_parent_class)->destroy (object);
 300 }
 301
 302 static void
 303 gtk_menu_item_finalize (GObject *object)
 304 {
 305   GtkMenuItem *menu_item = GTK_MENU_ITEM (object);
 306
 307   g_free (menu_item->accel_path);
 308
 309   G_OBJECT_CLASS (gtk_menu_item_parent_class)->finalize (object);
 310 }
 311
 312 static void
 313 gtk_menu_item_detacher (GtkWidget     *widget,
 314                         GtkMenu       *menu)
 315 {
 316   GtkMenuItem *menu_item;
 317
 318   g_return_if_fail (GTK_IS_MENU_ITEM (widget));
 319
 320   menu_item = GTK_MENU_ITEM (widget);
 321   g_return_if_fail (menu_item->submenu == (GtkWidget*) menu);
 322
 323   menu_item->submenu = NULL;
 324 }
 325
 326 void
 327 gtk_menu_item_set_submenu (GtkMenuItem *menu_item,
 328                            GtkWidget   *submenu)
 329 {
 330   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 331
 332   if (menu_item->submenu != submenu)
 333     {
 334       gtk_menu_item_remove_submenu (menu_item);
 335
 336       menu_item->submenu = submenu;
 337       gtk_menu_attach_to_widget (GTK_MENU (submenu),
 338                                  GTK_WIDGET (menu_item),
 339                                  gtk_menu_item_detacher);
 340
 341       if (GTK_WIDGET (menu_item)->parent)
 342         gtk_widget_queue_resize (GTK_WIDGET (menu_item));
 343     }
 344 }
 345
 346 /**
 347  * gtk_menu_item_get_submenu:
 348  * @menu_item: a #GtkMenuItem
 349  *
 350  * Gets the submenu underneath this menu item, if any. See
 351  * gtk_menu_item_set_submenu().
 352  *
 353  * Return value: submenu for this menu item, or %NULL if none.
 354  **/
 355 GtkWidget *
 356 gtk_menu_item_get_submenu (GtkMenuItem *menu_item)
 357 {
 358   g_return_val_if_fail (GTK_IS_MENU_ITEM (menu_item), NULL);
 359
 360   return menu_item->submenu;
 361 }
 362
 363 void
 364 gtk_menu_item_remove_submenu (GtkMenuItem         *menu_item)
 365 {
 366   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 367
 368   if (menu_item->submenu)
 369     gtk_menu_detach (GTK_MENU (menu_item->submenu));
 370 }
 371
 372 void _gtk_menu_item_set_placement (GtkMenuItem         *menu_item,
 373                                    GtkSubmenuPlacement  placement);
 374
 375 void
 376 _gtk_menu_item_set_placement (GtkMenuItem         *menu_item,
 377                              GtkSubmenuPlacement  placement)
 378 {
 379   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 380
 381   menu_item->submenu_placement = placement;
 382 }
 383
 384 void
 385 gtk_menu_item_select (GtkMenuItem *menu_item)
 386 {
 387   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 388
 389   gtk_item_select (GTK_ITEM (menu_item));
 390 }
 391
 392 void
 393 gtk_menu_item_deselect (GtkMenuItem *menu_item)
 394 {
 395   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 396
 397   gtk_item_deselect (GTK_ITEM (menu_item));
 398 }
 399
 400 void
 401 gtk_menu_item_activate (GtkMenuItem *menu_item)
 402 {
 403   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 404
 405   g_signal_emit (menu_item, menu_item_signals[ACTIVATE], 0);
 406 }
 407
 408 void
 409 gtk_menu_item_toggle_size_request (GtkMenuItem *menu_item,
 410                                    gint        *requisition)
 411 {
 412   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 413
 414   g_signal_emit (menu_item, menu_item_signals[TOGGLE_SIZE_REQUEST], 0, requisition);
 415 }
 416
 417 void
 418 gtk_menu_item_toggle_size_allocate (GtkMenuItem *menu_item,
 419                                     gint         allocation)
 420 {
 421   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 422
 423   g_signal_emit (menu_item, menu_item_signals[TOGGLE_SIZE_ALLOCATE], 0, allocation);
 424 }
 425
 426 static void
 427 gtk_menu_item_accel_width_foreach (GtkWidget *widget,
 428                                    gpointer data)
 429 {
 430   guint *width = data;
 431
 432   if (GTK_IS_ACCEL_LABEL (widget))
 433     {
 434       guint w;
 435
 436       w = gtk_accel_label_get_accel_width (GTK_ACCEL_LABEL (widget));
 437       *width = MAX (*width, w);
 438     }
 439   else if (GTK_IS_CONTAINER (widget))
 440     gtk_container_foreach (GTK_CONTAINER (widget),
 441                            gtk_menu_item_accel_width_foreach,
 442                            data);
 443 }
 444
 445 static gint
 446 get_minimum_width (GtkWidget *widget)
 447 {
 448   PangoContext *context;
 449   PangoFontMetrics *metrics;
 450   gint height;
 451
 452   context = gtk_widget_get_pango_context (widget);
 453   metrics = pango_context_get_metrics (context,
 454                                        widget->style->font_desc,
 455                                        pango_context_get_language (context));
 456
 457   height = pango_font_metrics_get_ascent (metrics) +
 458       pango_font_metrics_get_descent (metrics);
 459
 460   pango_font_metrics_unref (metrics);
 461
 462   return PANGO_PIXELS (7 * height);
 463 }
 464
 465 static void
 466 gtk_menu_item_size_request (GtkWidget      *widget,
 467                             GtkRequisition *requisition)
 468 {
 469   GtkMenuItem *menu_item;
 470   GtkBin *bin;
 471   guint accel_width;
 472   guint horizontal_padding;
 473   GtkPackDirection pack_dir;
 474   GtkPackDirection child_pack_dir;
 475
 476   g_return_if_fail (GTK_IS_MENU_ITEM (widget));
 477   g_return_if_fail (requisition != NULL);
 478
 479   gtk_widget_style_get (widget,
 480                         "horizontal-padding", &horizontal_padding,
 481                         NULL);
 482
 483   bin = GTK_BIN (widget);
 484   menu_item = GTK_MENU_ITEM (widget);
 485
 486   if (GTK_IS_MENU_BAR (widget->parent))
 487     {
 488       pack_dir = gtk_menu_bar_get_pack_direction (GTK_MENU_BAR (widget->parent));
 489       child_pack_dir = gtk_menu_bar_get_child_pack_direction (GTK_MENU_BAR (widget->parent));
 490     }
 491   else
 492     {
 493       pack_dir = GTK_PACK_DIRECTION_LTR;
 494       child_pack_dir = GTK_PACK_DIRECTION_LTR;
 495     }
 496
 497   requisition->width = (GTK_CONTAINER (widget)->border_width +
 498                         widget->style->xthickness) * 2;
 499   requisition->height = (GTK_CONTAINER (widget)->border_width +
 500                          widget->style->ythickness) * 2;
 501
 502   if ((pack_dir == GTK_PACK_DIRECTION_LTR || pack_dir == GTK_PACK_DIRECTION_RTL) &&
 503       (child_pack_dir == GTK_PACK_DIRECTION_LTR || child_pack_dir == GTK_PACK_DIRECTION_RTL))
 504     requisition->width += 2 * horizontal_padding;
 505   else if ((pack_dir == GTK_PACK_DIRECTION_TTB || pack_dir == GTK_PACK_DIRECTION_BTT) &&
 506       (child_pack_dir == GTK_PACK_DIRECTION_TTB || child_pack_dir == GTK_PACK_DIRECTION_BTT))
 507     requisition->height += 2 * horizontal_padding;
 508
 509   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 510     {
 511       GtkRequisition child_requisition;
 512
 513       gtk_widget_size_request (bin->child, &child_requisition);
 514
 515       requisition->width += child_requisition.width;
 516       requisition->height += child_requisition.height;
 517
 518       if (menu_item->submenu && menu_item->show_submenu_indicator)
 519         {
 520           guint arrow_spacing;
 521
 522           gtk_widget_style_get (widget,
 523                                 "arrow-spacing", &arrow_spacing,
 524                                 NULL);
 525
 526           requisition->width += child_requisition.height;
 527           requisition->width += arrow_spacing;
 528
 529           requisition->width = MAX (requisition->width, get_minimum_width (widget));
 530         }
 531     }
 532   else /* separator item */
 533     {
 534       gboolean wide_separators;
 535       gint     separator_height;
 536
 537       gtk_widget_style_get (widget,
 538                             "wide-separators",  &wide_separators,
 539                             "separator-height", &separator_height,
 540                             NULL);
 541
 542       if (wide_separators)
 543         requisition->height += separator_height + widget->style->ythickness;
 544       else
 545         requisition->height += widget->style->ythickness * 2;
 546     }
 547
 548   accel_width = 0;
 549   gtk_container_foreach (GTK_CONTAINER (menu_item),
 550                          gtk_menu_item_accel_width_foreach,
 551                          &accel_width);
 552   menu_item->accelerator_width = accel_width;
 553 }
 554
 555 static void
 556 gtk_menu_item_size_allocate (GtkWidget     *widget,
 557                              GtkAllocation *allocation)
 558 {
 559   GtkMenuItem *menu_item;
 560   GtkBin *bin;
 561   GtkAllocation child_allocation;
 562   GtkTextDirection direction;
 563   GtkPackDirection pack_dir;
 564   GtkPackDirection child_pack_dir;
 565
 566   g_return_if_fail (GTK_IS_MENU_ITEM (widget));
 567   g_return_if_fail (allocation != NULL);
 568
 569   menu_item = GTK_MENU_ITEM (widget);
 570   bin = GTK_BIN (widget);
 571
 572   direction = gtk_widget_get_direction (widget);
 573
 574   if (GTK_IS_MENU_BAR (widget->parent))
 575     {
 576       pack_dir = gtk_menu_bar_get_pack_direction (GTK_MENU_BAR (widget->parent));
 577       child_pack_dir = gtk_menu_bar_get_child_pack_direction (GTK_MENU_BAR (widget->parent));
 578     }
 579   else
 580     {
 581       pack_dir = GTK_PACK_DIRECTION_LTR;
 582       child_pack_dir = GTK_PACK_DIRECTION_LTR;
 583     }
 584
 585   widget->allocation = *allocation;
 586
 587   if (bin->child)
 588     {
 589       GtkRequisition child_requisition;
 590       guint horizontal_padding;
 591
 592       gtk_widget_style_get (widget,
 593                             "horizontal-padding", &horizontal_padding,
 594                             NULL);
 595
 596       child_allocation.x = GTK_CONTAINER (widget)->border_width + widget->style->xthickness;
 597       child_allocation.y = GTK_CONTAINER (widget)->border_width + widget->style->ythickness;
 598
 599       if ((pack_dir == GTK_PACK_DIRECTION_LTR || pack_dir == GTK_PACK_DIRECTION_RTL) &&
 600           (child_pack_dir == GTK_PACK_DIRECTION_LTR || child_pack_dir == GTK_PACK_DIRECTION_RTL))
 601         child_allocation.x += horizontal_padding;
 602       else if ((pack_dir == GTK_PACK_DIRECTION_TTB || pack_dir == GTK_PACK_DIRECTION_BTT) &&
 603                (child_pack_dir == GTK_PACK_DIRECTION_TTB || child_pack_dir == GTK_PACK_DIRECTION_BTT))
 604         child_allocation.y += horizontal_padding;
 605
 606       child_allocation.width = MAX (1, (gint)allocation->width - child_allocation.x * 2);
 607       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 608
 609       if (child_pack_dir == GTK_PACK_DIRECTION_LTR ||
 610           child_pack_dir == GTK_PACK_DIRECTION_RTL)
 611         {
 612           if ((direction == GTK_TEXT_DIR_LTR) == (child_pack_dir != GTK_PACK_DIRECTION_RTL))
 613             child_allocation.x += GTK_MENU_ITEM (widget)->toggle_size;
 614           child_allocation.width -= GTK_MENU_ITEM (widget)->toggle_size;
 615         }
 616       else
 617         {
 618           if ((direction == GTK_TEXT_DIR_LTR) == (child_pack_dir != GTK_PACK_DIRECTION_BTT))
 619             child_allocation.y += GTK_MENU_ITEM (widget)->toggle_size;
 620           child_allocation.height -= GTK_MENU_ITEM (widget)->toggle_size;
 621         }
 622
 623       child_allocation.x += widget->allocation.x;
 624       child_allocation.y += widget->allocation.y;
 625
 626       gtk_widget_get_child_requisition (bin->child, &child_requisition);
 627       if (menu_item->submenu && menu_item->show_submenu_indicator)
 628         {
 629           if (direction == GTK_TEXT_DIR_RTL)
 630             child_allocation.x += child_requisition.height;
 631           child_allocation.width -= child_requisition.height;
 632         }
 633
 634       if (child_allocation.width < 1)
 635         child_allocation.width = 1;
 636
 637       gtk_widget_size_allocate (bin->child, &child_allocation);
 638     }
 639
 640   if (GTK_WIDGET_REALIZED (widget))
 641     gdk_window_move_resize (menu_item->event_window,
 642                             allocation->x, allocation->y,
 643                             allocation->width, allocation->height);
 644
 645   if (menu_item->submenu)
 646     gtk_menu_reposition (GTK_MENU (menu_item->submenu));
 647 }
 648
 649 static void
 650 gtk_menu_item_realize (GtkWidget *widget)
 651 {
 652   GtkMenuItem *menu_item = GTK_MENU_ITEM (widget);
 653   GdkWindowAttr attributes;
 654   gint attributes_mask;
 655
 656   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 657
 658   widget->window = gtk_widget_get_parent_window (widget);
 659   g_object_ref (widget->window);
 660
 661   attributes.x = widget->allocation.x;
 662   attributes.y = widget->allocation.y;
 663   attributes.width = widget->allocation.width;
 664   attributes.height = widget->allocation.height;
 665   attributes.window_type = GDK_WINDOW_CHILD;
 666   attributes.wclass = GDK_INPUT_ONLY;
 667   attributes.event_mask = (gtk_widget_get_events (widget) |
 668                            GDK_BUTTON_PRESS_MASK |
 669                            GDK_BUTTON_RELEASE_MASK |
 670                            GDK_ENTER_NOTIFY_MASK |
 671                            GDK_LEAVE_NOTIFY_MASK |
 672                            GDK_POINTER_MOTION_MASK);
 673
 674   attributes_mask = GDK_WA_X | GDK_WA_Y;
 675   menu_item->event_window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 676   gdk_window_set_user_data (menu_item->event_window, widget);
 677
 678   widget->style = gtk_style_attach (widget->style, widget->window);
 679 }
 680
 681 static void
 682 gtk_menu_item_unrealize (GtkWidget *widget)
 683 {
 684   GtkMenuItem *menu_item = GTK_MENU_ITEM (widget);
 685
 686   gdk_window_set_user_data (menu_item->event_window, NULL);
 687   gdk_window_destroy (menu_item->event_window);
 688   menu_item->event_window = NULL;
 689
 690   if (GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->unrealize)
 691     (* GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->unrealize) (widget);
 692 }
 693
 694 static void
 695 gtk_menu_item_map (GtkWidget *widget)
 696 {
 697   GtkMenuItem *menu_item = GTK_MENU_ITEM (widget);
 698
 699   GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->map (widget);
 700
 701   gdk_window_show (menu_item->event_window);
 702 }
 703
 704 static void
 705 gtk_menu_item_unmap (GtkWidget *widget)
 706 {
 707   GtkMenuItem *menu_item = GTK_MENU_ITEM (widget);
 708
 709   gdk_window_hide (menu_item->event_window);
 710
 711   GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->unmap (widget);
 712 }
 713
 714 static void
 715 gtk_menu_item_paint (GtkWidget    *widget,
 716                      GdkRectangle *area)
 717 {
 718   GtkMenuItem *menu_item;
 719   GtkStateType state_type;
 720   GtkShadowType shadow_type, selected_shadow_type;
 721   gint width, height;
 722   gint x, y;
 723   gint border_width = GTK_CONTAINER (widget)->border_width;
 724
 725   if (GTK_WIDGET_DRAWABLE (widget))
 726     {
 727       menu_item = GTK_MENU_ITEM (widget);
 728
 729       state_type = widget->state;
 730
 731       x = widget->allocation.x + border_width;
 732       y = widget->allocation.y + border_width;
 733       width = widget->allocation.width - border_width * 2;
 734       height = widget->allocation.height - border_width * 2;
 735
 736       if ((state_type == GTK_STATE_PRELIGHT) &&
 737           (GTK_BIN (menu_item)->child))
 738         {
 739           gtk_widget_style_get (widget,
 740                                 "selected-shadow-type", &selected_shadow_type,
 741                                 NULL);
 742           gtk_paint_box (widget->style,
 743                          widget->window,
 744                          GTK_STATE_PRELIGHT,
 745                          selected_shadow_type,
 746                          area, widget, "menuitem",
 747                          x, y, width, height);
 748         }
 749
 750       if (menu_item->submenu && menu_item->show_submenu_indicator)
 751         {
 752           gint arrow_x, arrow_y;
 753           gint arrow_size;
 754           gint arrow_extent;
 755           guint horizontal_padding;
 756           GtkTextDirection direction;
 757           GtkArrowType arrow_type;
 758           PangoContext *context;
 759           PangoFontMetrics *metrics;
 760           gint ascent, descent;
 761
 762           direction = gtk_widget_get_direction (widget);
 763
 764           gtk_widget_style_get (widget,
 765                                 "horizontal-padding", &horizontal_padding,
 766                                 NULL);
 767
 768           context = gtk_widget_get_pango_context (GTK_BIN (menu_item)->child);
 769           metrics = pango_context_get_metrics (context,
 770                                                GTK_WIDGET (GTK_BIN (menu_item)->child)->style->font_desc,
 771                                                pango_context_get_language (context));
 772
 773           ascent = pango_font_metrics_get_ascent (metrics);
 774           descent = pango_font_metrics_get_descent (metrics);
 775           pango_font_metrics_unref (metrics);
 776
 777           arrow_size = PANGO_PIXELS (ascent + descent) - 2 * widget->style->ythickness;
 778
 779           arrow_extent = arrow_size * 0.8;
 780
 781           shadow_type = GTK_SHADOW_OUT;
 782           if (state_type == GTK_STATE_PRELIGHT)
 783             shadow_type = GTK_SHADOW_IN;
 784
 785           if (direction == GTK_TEXT_DIR_LTR)
 786             {
 787               arrow_x = x + width - horizontal_padding - arrow_extent;
 788               arrow_type = GTK_ARROW_RIGHT;
 789             }
 790           else
 791             {
 792               arrow_x = x + horizontal_padding;
 793               arrow_type = GTK_ARROW_LEFT;
 794             }
 795
 796           arrow_y = y + (height - arrow_extent) / 2;
 797
 798           gtk_paint_arrow (widget->style, widget->window,
 799                            state_type, shadow_type,
 800                            area, widget, "menuitem",
 801                            arrow_type, TRUE,
 802                            arrow_x, arrow_y,
 803                            arrow_extent, arrow_extent);
 804         }
 805       else if (!GTK_BIN (menu_item)->child)
 806         {
 807           gboolean wide_separators;
 808           gint     separator_height;
 809           guint    horizontal_padding;
 810
 811           gtk_widget_style_get (widget,
 812                                 "wide-separators",    &wide_separators,
 813                                 "separator-height",   &separator_height,
 814                                 "horizontal-padding", &horizontal_padding,
 815                                 NULL);
 816
 817           if (wide_separators)
 818             gtk_paint_box (widget->style, widget->window,
 819                            GTK_STATE_NORMAL, GTK_SHADOW_ETCHED_OUT,
 820                            area, widget, "hseparator",
 821                            widget->allocation.x + horizontal_padding + widget->style->xthickness,
 822                            widget->allocation.y + (widget->allocation.height -
 823                                                    separator_height -
 824                                                    widget->style->ythickness) / 2,
 825                            widget->allocation.width -
 826                            2 * (horizontal_padding + widget->style->xthickness),
 827                            separator_height);
 828           else
 829             gtk_paint_hline (widget->style, widget->window,
 830                              GTK_STATE_NORMAL, area, widget, "menuitem",
 831                              widget->allocation.x + horizontal_padding + widget->style->xthickness,
 832                              widget->allocation.x + widget->allocation.width - horizontal_padding - widget->style->xthickness - 1,
 833                              widget->allocation.y + (widget->allocation.height -
 834                                                      widget->style->ythickness) / 2);
 835         }
 836     }
 837 }
 838
 839 static gint
 840 gtk_menu_item_expose (GtkWidget      *widget,
 841                       GdkEventExpose *event)
 842 {
 843   g_return_val_if_fail (GTK_IS_MENU_ITEM (widget), FALSE);
 844   g_return_val_if_fail (event != NULL, FALSE);
 845
 846   if (GTK_WIDGET_DRAWABLE (widget))
 847     {
 848       gtk_menu_item_paint (widget, &event->area);
 849
 850       (* GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->expose_event) (widget, event);
 851     }
 852
 853   return FALSE;
 854 }
 855
 856 static gint
 857 get_popup_delay (GtkMenuItem *menu_item)
 858 {
 859   GtkWidget *parent = GTK_WIDGET (menu_item)->parent;
 860
 861   if (GTK_IS_MENU_SHELL (parent))
 862     {
 863       return _gtk_menu_shell_get_popup_delay (GTK_MENU_SHELL (parent));
 864     }
 865   else
 866     {
 867       gint popup_delay;
 868
 869       g_object_get (gtk_widget_get_settings (GTK_WIDGET (menu_item)),
 870                     "gtk-menu-popup-delay", &popup_delay,
 871                     NULL);
 872
 873       return popup_delay;
 874     }
 875 }
 876
 877 static void
 878 gtk_real_menu_item_select (GtkItem *item)
 879 {
 880   GtkMenuItem *menu_item;
 881
 882   g_return_if_fail (GTK_IS_MENU_ITEM (item));
 883
 884   menu_item = GTK_MENU_ITEM (item);
 885
 886   if (menu_item->submenu &&
 887       (!GTK_WIDGET_MAPPED (menu_item->submenu) ||
 888        GTK_MENU (menu_item->submenu)->tearoff_active))
 889     {
 890       gint popup_delay;
 891
 892       if (menu_item->timer)
 893         {
 894           g_source_remove (menu_item->timer);
 895           menu_item->timer = 0;
 896           popup_delay = 0;
 897         }
 898       else
 899         popup_delay = get_popup_delay (menu_item);
 900
 901       if (popup_delay > 0)
 902         {
 903           GdkEvent *event = gtk_get_current_event ();
 904
 905           menu_item->timer = g_timeout_add (popup_delay,
 906                                             gtk_menu_item_select_timeout,
 907                                             menu_item);
 908           if (event &&
 909               event->type != GDK_BUTTON_PRESS &&
 910               event->type != GDK_ENTER_NOTIFY)
 911             menu_item->timer_from_keypress = TRUE;
 912           else
 913             menu_item->timer_from_keypress = FALSE;
 914
 915           if (event)
 916             gdk_event_free (event);
 917         }
 918       else
 919         _gtk_menu_item_popup_submenu (GTK_WIDGET (menu_item));
 920     }
 921
 922   gtk_widget_set_state (GTK_WIDGET (menu_item), GTK_STATE_PRELIGHT);
 923   gtk_widget_queue_draw (GTK_WIDGET (menu_item));
 924 }
 925
 926 static void
 927 gtk_real_menu_item_deselect (GtkItem *item)
 928 {
 929   GtkMenuItem *menu_item;
 930
 931   g_return_if_fail (GTK_IS_MENU_ITEM (item));
 932
 933   menu_item = GTK_MENU_ITEM (item);
 934
 935   if (menu_item->submenu)
 936     {
 937       if (menu_item->timer)
 938         {
 939           g_source_remove (menu_item->timer);
 940           menu_item->timer = 0;
 941         }
 942       else
 943         gtk_menu_popdown (GTK_MENU (menu_item->submenu));
 944     }
 945
 946   gtk_widget_set_state (GTK_WIDGET (menu_item), GTK_STATE_NORMAL);
 947   gtk_widget_queue_draw (GTK_WIDGET (menu_item));
 948 }
 949
 950 static gboolean
 951 gtk_menu_item_mnemonic_activate (GtkWidget *widget,
 952                                  gboolean   group_cycling)
 953 {
 954   if (group_cycling &&
 955       widget->parent &&
 956       GTK_IS_MENU_SHELL (widget->parent) &&
 957       GTK_MENU_SHELL (widget->parent)->active)
 958     {
 959       gtk_menu_shell_select_item (GTK_MENU_SHELL (widget->parent),
 960                                   widget);
 961     }
 962   else
 963     g_signal_emit (widget, menu_item_signals[ACTIVATE_ITEM], 0);
 964
 965   return TRUE;
 966 }
 967
 968
 969 static void
 970 gtk_real_menu_item_activate_item (GtkMenuItem *menu_item)
 971 {
 972   GtkWidget *widget;
 973
 974   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
 975
 976   widget = GTK_WIDGET (menu_item);
 977
 978   if (widget->parent &&
 979       GTK_IS_MENU_SHELL (widget->parent))
 980     {
 981       if (menu_item->submenu == NULL)
 982         gtk_menu_shell_activate_item (GTK_MENU_SHELL (widget->parent),
 983                                       widget, TRUE);
 984       else
 985         {
 986           GtkMenuShell *menu_shell = GTK_MENU_SHELL (widget->parent);
 987
 988           _gtk_menu_shell_activate (menu_shell);
 989
 990           gtk_menu_shell_select_item (GTK_MENU_SHELL (widget->parent), widget);
 991           _gtk_menu_item_popup_submenu (widget);
 992
 993           gtk_menu_shell_select_first (GTK_MENU_SHELL (menu_item->submenu), TRUE);
 994         }
 995     }
 996 }
 997 static void
 998 gtk_real_menu_item_toggle_size_request (GtkMenuItem *menu_item,
 999                                         gint        *requisition)
1000 {
1001   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
1002
1003   *requisition = 0;
1004 }
1005
1006 static void
1007 gtk_real_menu_item_toggle_size_allocate (GtkMenuItem *menu_item,
1008                                          gint         allocation)
1009 {
1010   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
1011
1012   menu_item->toggle_size = allocation;
1013 }
1014
1015 static gint
1016 gtk_menu_item_select_timeout (gpointer data)
1017 {
1018   GtkMenuItem *menu_item;
1019   GtkWidget *parent;
1020
1021   GDK_THREADS_ENTER ();
1022
1023   menu_item = GTK_MENU_ITEM (data);
1024
1025   parent = GTK_WIDGET (menu_item)->parent;
1026
1027   if ((GTK_IS_MENU_SHELL (parent) && GTK_MENU_SHELL (parent)->active) ||
1028       (GTK_IS_MENU (parent) && GTK_MENU (parent)->torn_off))
1029     {
1030       _gtk_menu_item_popup_submenu (GTK_WIDGET (menu_item));
1031       if (menu_item->timer_from_keypress && menu_item->submenu)
1032         GTK_MENU_SHELL (menu_item->submenu)->ignore_enter = TRUE;
1033     }
1034
1035   GDK_THREADS_LEAVE ();
1036
1037   return FALSE;
1038 }
1039
1040 void
1041 _gtk_menu_item_popup_submenu (GtkWidget *widget)
1042 {
1043   GtkMenuItem *menu_item;
1044
1045   menu_item = GTK_MENU_ITEM (widget);
1046
1047   if (menu_item->timer)
1048     g_source_remove (menu_item->timer);
1049   menu_item->timer = 0;
1050
1051   if (GTK_WIDGET_IS_SENSITIVE (menu_item->submenu))
1052     {
1053       gboolean take_focus;
1054
1055       take_focus = gtk_menu_shell_get_take_focus (GTK_MENU_SHELL (widget->parent));
1056       gtk_menu_shell_set_take_focus (GTK_MENU_SHELL (menu_item->submenu),
1057                                      take_focus);
1058
1059       gtk_menu_popup (GTK_MENU (menu_item->submenu),
1060                       widget->parent,
1061                       widget,
1062                       gtk_menu_item_position_menu,
1063                       menu_item,
1064                       GTK_MENU_SHELL (widget->parent)->button,
1065                       0);
1066     }
1067 }
1068
1069 static void
1070 get_offsets (GtkMenu *menu,
1071              gint    *horizontal_offset,
1072              gint    *vertical_offset)
1073 {
1074   gint vertical_padding;
1075   gint horizontal_padding;
1076
1077   gtk_widget_style_get (GTK_WIDGET (menu),
1078                         "horizontal-offset", horizontal_offset,
1079                         "vertical-offset", vertical_offset,
1080                         "horizontal-padding", &horizontal_padding,
1081                         "vertical-padding", &vertical_padding,
1082                         NULL);
1083
1084   *vertical_offset -= GTK_WIDGET (menu)->style->ythickness;
1085   *vertical_offset -= vertical_padding;
1086   *horizontal_offset += horizontal_padding;
1087 }
1088
1089 static void
1090 gtk_menu_item_position_menu (GtkMenu  *menu,
1091                              gint     *x,
1092                              gint     *y,
1093                              gboolean *push_in,
1094                              gpointer  user_data)
1095 {
1096   GtkMenuItem *menu_item;
1097   GtkWidget *widget;
1098   GtkMenuItem *parent_menu_item;
1099   GdkScreen *screen;
1100   gint twidth, theight;
1101   gint tx, ty;
1102   GtkTextDirection direction;
1103   GdkRectangle monitor;
1104   gint monitor_num;
1105   gint horizontal_offset;
1106   gint vertical_offset;
1107   gint parent_xthickness;
1108
1109   g_return_if_fail (menu != NULL);
1110   g_return_if_fail (x != NULL);
1111   g_return_if_fail (y != NULL);
1112
1113   menu_item = GTK_MENU_ITEM (user_data);
1114   widget = GTK_WIDGET (user_data);
1115
1116   if (push_in)
1117     *push_in = FALSE;
1118
1119   direction = gtk_widget_get_direction (widget);
1120
1121   twidth = GTK_WIDGET (menu)->requisition.width;
1122   theight = GTK_WIDGET (menu)->requisition.height;
1123
1124   screen = gtk_widget_get_screen (GTK_WIDGET (menu));
1125   monitor_num = gdk_screen_get_monitor_at_window (screen, menu_item->event_window);
1126   if (monitor_num < 0)
1127     monitor_num = 0;
1128   gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
1129
1130   if (!gdk_window_get_origin (widget->window, &tx, &ty))
1131     {
1132       g_warning ("Menu not on screen");
1133       return;
1134     }
1135
1136   tx += widget->allocation.x;
1137   ty += widget->allocation.y;
1138
1139   get_offsets (menu, &horizontal_offset, &vertical_offset);
1140
1141   if (GTK_IS_MENU_BAR (widget->parent))
1142     {
1143       menu_item->from_menubar = TRUE;
1144     }
1145   else if (GTK_IS_MENU (widget->parent))
1146     {
1147       if (GTK_MENU (widget->parent)->parent_menu_item)
1148         menu_item->from_menubar = GTK_MENU_ITEM (GTK_MENU (widget->parent)->parent_menu_item)->from_menubar;
1149       else
1150         menu_item->from_menubar = FALSE;
1151     }
1152   else
1153     {
1154       menu_item->from_menubar = FALSE;
1155     }
1156
1157   switch (menu_item->submenu_placement)
1158     {
1159     case GTK_TOP_BOTTOM:
1160       if (direction == GTK_TEXT_DIR_LTR)
1161         menu_item->submenu_direction = GTK_DIRECTION_RIGHT;
1162       else
1163         {
1164           menu_item->submenu_direction = GTK_DIRECTION_LEFT;
1165           tx += widget->allocation.width - twidth;
1166         }
1167       if ((ty + widget->allocation.height + theight) <= monitor.y + monitor.height)
1168         ty += widget->allocation.height;
1169       else if ((ty - theight) >= monitor.y)
1170         ty -= theight;
1171       else if (monitor.y + monitor.height - (ty + widget->allocation.height) > ty)
1172         ty += widget->allocation.height;
1173       else
1174         ty -= theight;
1175       break;
1176
1177     case GTK_LEFT_RIGHT:
1178       if (GTK_IS_MENU (widget->parent))
1179         parent_menu_item = GTK_MENU_ITEM (GTK_MENU (widget->parent)->parent_menu_item);
1180       else
1181         parent_menu_item = NULL;
1182
1183       parent_xthickness = widget->parent->style->xthickness;
1184
1185       if (parent_menu_item && !GTK_MENU (widget->parent)->torn_off)
1186         {
1187           menu_item->submenu_direction = parent_menu_item->submenu_direction;
1188         }
1189       else
1190         {
1191           if (direction == GTK_TEXT_DIR_LTR)
1192             menu_item->submenu_direction = GTK_DIRECTION_RIGHT;
1193           else
1194             menu_item->submenu_direction = GTK_DIRECTION_LEFT;
1195         }
1196
1197       switch (menu_item->submenu_direction)
1198         {
1199         case GTK_DIRECTION_LEFT:
1200           if ((tx - twidth - parent_xthickness - horizontal_offset) >= monitor.x)
1201             tx -= twidth + parent_xthickness + horizontal_offset;
1202           else
1203             {
1204               menu_item->submenu_direction = GTK_DIRECTION_RIGHT;
1205               tx += widget->allocation.width + parent_xthickness + horizontal_offset;
1206             }
1207           break;
1208
1209         case GTK_DIRECTION_RIGHT:
1210           if ((tx + widget->allocation.width + parent_xthickness + horizontal_offset + twidth) <= monitor.x + monitor.width)
1211             tx += widget->allocation.width + parent_xthickness + horizontal_offset;
1212           else
1213             {
1214               menu_item->submenu_direction = GTK_DIRECTION_LEFT;
1215               tx -= twidth + parent_xthickness + horizontal_offset;
1216             }
1217           break;
1218         }
1219
1220       ty += vertical_offset;
1221
1222       /* If the height of the menu doesn't fit we move it upward. */
1223       ty = CLAMP (ty, monitor.y, MAX (monitor.y, monitor.y + monitor.height - theight));
1224       break;
1225     }
1226
1227   /* If we have negative, tx, here it is because we can't get
1228    * the menu all the way on screen. Favor the left portion.
1229    */
1230   *x = CLAMP (tx, monitor.x, MAX (monitor.x, monitor.x + monitor.width - twidth));
1231   *y = ty;
1232
1233   gtk_menu_set_monitor (menu, monitor_num);
1234
1235   if (!GTK_WIDGET_VISIBLE (menu->toplevel))
1236     {
1237       gtk_window_set_type_hint (GTK_WINDOW (menu->toplevel), menu_item->from_menubar?
1238                                 GDK_WINDOW_TYPE_HINT_DROPDOWN_MENU : GDK_WINDOW_TYPE_HINT_POPUP_MENU);
1239     }
1240 }
1241
1242 /**
1243  * gtk_menu_item_set_right_justified:
1244  * @menu_item: a #GtkMenuItem.
1245  * @right_justified: if %TRUE the menu item will appear at the
1246  *   far right if added to a menu bar.
1247  *
1248  * Sets whether the menu item appears justified at the right
1249  * side of a menu bar. This was traditionally done for "Help" menu
1250  * items, but is now considered a bad idea. (If the widget
1251  * layout is reversed for a right-to-left language like Hebrew
1252  * or Arabic, right-justified-menu-items appear at the left.)
1253  **/
1254 void
1255 gtk_menu_item_set_right_justified (GtkMenuItem *menu_item,
1256                                    gboolean     right_justified)
1257 {
1258   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
1259
1260   right_justified = right_justified != FALSE;
1261
1262   if (right_justified != menu_item->right_justify)
1263     {
1264       menu_item->right_justify = right_justified;
1265       gtk_widget_queue_resize (GTK_WIDGET (menu_item));
1266     }
1267 }
1268
1269 /**
1270  * gtk_menu_item_get_right_justified:
1271  * @menu_item: a #GtkMenuItem
1272  *
1273  * Gets whether the menu item appears justified at the right
1274  * side of the menu bar.
1275  *
1276  * Return value: %TRUE if the menu item will appear at the
1277  *   far right if added to a menu bar.
1278  **/
1279 gboolean
1280 gtk_menu_item_get_right_justified (GtkMenuItem *menu_item)
1281 {
1282   g_return_val_if_fail (GTK_IS_MENU_ITEM (menu_item), FALSE);
1283
1284   return menu_item->right_justify;
1285 }
1286
1287
1288 static void
1289 gtk_menu_item_show_all (GtkWidget *widget)
1290 {
1291   GtkMenuItem *menu_item;
1292
1293   g_return_if_fail (GTK_IS_MENU_ITEM (widget));
1294
1295   menu_item = GTK_MENU_ITEM (widget);
1296
1297   /* show children including submenu */
1298   if (menu_item->submenu)
1299     gtk_widget_show_all (menu_item->submenu);
1300   gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL);
1301
1302   gtk_widget_show (widget);
1303 }
1304
1305 static void
1306 gtk_menu_item_hide_all (GtkWidget *widget)
1307 {
1308   GtkMenuItem *menu_item;
1309
1310   g_return_if_fail (GTK_IS_MENU_ITEM (widget));
1311
1312   gtk_widget_hide (widget);
1313
1314   menu_item = GTK_MENU_ITEM (widget);
1315
1316   /* hide children including submenu */
1317   gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_hide_all, NULL);
1318   if (menu_item->submenu)
1319     gtk_widget_hide_all (menu_item->submenu);
1320 }
1321
1322 static gboolean
1323 gtk_menu_item_can_activate_accel (GtkWidget *widget,
1324                                   guint      signal_id)
1325 {
1326   /* Chain to the parent GtkMenu for further checks */
1327   return (GTK_WIDGET_IS_SENSITIVE (widget) && GTK_WIDGET_VISIBLE (widget) &&
1328           widget->parent && gtk_widget_can_activate_accel (widget->parent, signal_id));
1329 }
1330
1331 static void
1332 gtk_menu_item_accel_name_foreach (GtkWidget *widget,
1333                                   gpointer data)
1334 {
1335   const gchar **path_p = data;
1336
1337   if (!*path_p)
1338     {
1339       if (GTK_IS_LABEL (widget))
1340         {
1341           *path_p = gtk_label_get_text (GTK_LABEL (widget));
1342           if (*path_p && (*path_p)[0] == 0)
1343             *path_p = NULL;
1344         }
1345       else if (GTK_IS_CONTAINER (widget))
1346         gtk_container_foreach (GTK_CONTAINER (widget),
1347                                gtk_menu_item_accel_name_foreach,
1348                                data);
1349     }
1350 }
1351
1352 static void
1353 gtk_menu_item_parent_set (GtkWidget *widget,
1354                           GtkWidget *previous_parent)
1355 {
1356   GtkMenuItem *menu_item = GTK_MENU_ITEM (widget);
1357   GtkMenu *menu = GTK_IS_MENU (widget->parent) ? GTK_MENU (widget->parent) : NULL;
1358
1359   if (menu)
1360     _gtk_menu_item_refresh_accel_path (menu_item,
1361                                        menu->accel_path,
1362                                        menu->accel_group,
1363                                        TRUE);
1364
1365   if (GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->parent_set)
1366     GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->parent_set (widget, previous_parent);
1367 }
1368
1369 void
1370 _gtk_menu_item_refresh_accel_path (GtkMenuItem   *menu_item,
1371                                    const gchar   *prefix,
1372                                    GtkAccelGroup *accel_group,
1373                                    gboolean       group_changed)
1374 {
1375   const gchar *path;
1376   GtkWidget *widget;
1377
1378   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
1379   g_return_if_fail (!accel_group || GTK_IS_ACCEL_GROUP (accel_group));
1380
1381   widget = GTK_WIDGET (menu_item);
1382
1383   if (!accel_group)
1384     {
1385       gtk_widget_set_accel_path (widget, NULL, NULL);
1386       return;
1387     }
1388
1389   path = _gtk_widget_get_accel_path (widget, NULL);
1390   if (!path)                                    /* no active accel_path yet */
1391     {
1392       path = menu_item->accel_path;
1393       if (!path && prefix)
1394         {
1395           gchar *postfix = NULL;
1396
1397           /* try to construct one from label text */
1398           gtk_container_foreach (GTK_CONTAINER (menu_item),
1399                                  gtk_menu_item_accel_name_foreach,
1400                                  &postfix);
1401           menu_item->accel_path = postfix ? g_strconcat (prefix, "/", postfix, NULL) : NULL;
1402           path = menu_item->accel_path;
1403         }
1404       if (path)
1405         gtk_widget_set_accel_path (widget, path, accel_group);
1406     }
1407   else if (group_changed)                       /* reinstall accelerators */
1408     gtk_widget_set_accel_path (widget, path, accel_group);
1409 }
1410
1411 /**
1412  * gtk_menu_item_set_accel_path
1413  * @menu_item:  a valid #GtkMenuItem
1414  * @accel_path: accelerator path, corresponding to this menu item's
1415  *              functionality, or %NULL to unset the current path.
1416  *
1417  * Set the accelerator path on @menu_item, through which runtime changes of the
1418  * menu item's accelerator caused by the user can be identified and saved to
1419  * persistant storage (see gtk_accel_map_save() on this).
1420  * To setup a default accelerator for this menu item, call
1421  * gtk_accel_map_add_entry() with the same @accel_path.
1422  * See also gtk_accel_map_add_entry() on the specifics of accelerator paths,
1423  * and gtk_menu_set_accel_path() for a more convenient variant of this function.
1424  *
1425  * This function is basically a convenience wrapper that handles calling
1426  * gtk_widget_set_accel_path() with the appropriate accelerator group for
1427  * the menu item.
1428  *
1429  * Note that you do need to set an accelerator on the parent menu with
1430  * gtk_menu_set_accel_group() for this to work.
1431  */
1432 void
1433 gtk_menu_item_set_accel_path (GtkMenuItem *menu_item,
1434                               const gchar *accel_path)
1435 {
1436   GtkWidget *widget;
1437
1438   g_return_if_fail (GTK_IS_MENU_ITEM (menu_item));
1439   g_return_if_fail (accel_path == NULL ||
1440                     (accel_path[0] == '<' && strchr (accel_path, '/')));
1441
1442   widget = GTK_WIDGET (menu_item);
1443
1444   /* store new path */
1445   g_free (menu_item->accel_path);
1446   menu_item->accel_path = g_strdup (accel_path);
1447
1448   /* forget accelerators associated with old path */
1449   gtk_widget_set_accel_path (widget, NULL, NULL);
1450
1451   /* install accelerators associated with new path */
1452   if (widget->parent && GTK_IS_MENU (widget->parent))
1453     {
1454       GtkMenu *menu = GTK_MENU (widget->parent);
1455
1456       if (menu->accel_group)
1457         _gtk_menu_item_refresh_accel_path (GTK_MENU_ITEM (widget),
1458                                            NULL,
1459                                            menu->accel_group,
1460                                            FALSE);
1461     }
1462 }
1463
1464 static void
1465 gtk_menu_item_forall (GtkContainer *container,
1466                       gboolean      include_internals,
1467                       GtkCallback   callback,
1468                       gpointer      callback_data)
1469 {
1470   GtkBin *bin;
1471
1472   g_return_if_fail (GTK_IS_MENU_ITEM (container));
1473   g_return_if_fail (callback != NULL);
1474
1475   bin = GTK_BIN (container);
1476
1477   if (bin->child)
1478     callback (bin->child, callback_data);
1479 }
1480
1481 gboolean
1482 _gtk_menu_item_is_selectable (GtkWidget *menu_item)
1483 {
1484   if ((!GTK_BIN (menu_item)->child &&
1485        G_OBJECT_TYPE (menu_item) == GTK_TYPE_MENU_ITEM) ||
1486       GTK_IS_SEPARATOR_MENU_ITEM (menu_item) ||
1487       !GTK_WIDGET_IS_SENSITIVE (menu_item) ||
1488       !GTK_WIDGET_VISIBLE (menu_item))
1489     return FALSE;
1490
1491   return TRUE;
1492 }
1493
1494 #define __GTK_MENU_ITEM_C__
1495 #include "gtkaliasdef.c"