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

   1 /*
   2  * GTK - The GIMP Toolkit
   3  * Copyright (C) 1998, 1999 Red Hat, Inc.
   4  * All rights reserved.
   5  *
   6  * This Library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This Library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with the Gnome Library; see the file COPYING.LIB.  If not,
  18  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 /*
  23  * Author: James Henstridge <james@daa.com.au>
  24  *
  25  * Modified by the GTK+ Team and others 2003.  See the AUTHORS
  26  * file for a list of people on the GTK+ Team.  See the ChangeLog
  27  * files for a list of changes.  These files are distributed with
  28  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  29  */
  30
  31 #include <config.h>
  32
  33 #include "gtkaction.h"
  34 #include "gtkactiongroup.h"
  35 #include "gtkaccellabel.h"
  36 #include "gtkbutton.h"
  37 #include "gtkimage.h"
  38 #include "gtkimagemenuitem.h"
  39 #include "gtkintl.h"
  40 #include "gtklabel.h"
  41 #include "gtkmarshalers.h"
  42 #include "gtkmenuitem.h"
  43 #include "gtkstock.h"
  44 #include "gtktearoffmenuitem.h"
  45 #include "gtktoolbutton.h"
  46 #include "gtktoolbar.h"
  47 #include "gtkprivate.h"
  48 #include "gtkalias.h"
  49
  50
  51 #define GTK_ACTION_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_ACTION, GtkActionPrivate))
  52
  53 struct _GtkActionPrivate
  54 {
  55   gchar *name;
  56   gchar *label;
  57   gchar *short_label;
  58   gchar *tooltip;
  59   gchar *stock_id; /* icon */
  60
  61   guint sensitive          : 1;
  62   guint visible            : 1;
  63   guint label_set          : 1; /* these two used so we can set label */
  64   guint short_label_set    : 1; /* based on stock id */
  65   guint visible_horizontal : 1;
  66   guint visible_vertical   : 1;
  67   guint is_important       : 1;
  68   guint hide_if_empty      : 1;
  69   guint visible_overflown  : 1;
  70
  71   /* accelerator */
  72   guint          accel_count;
  73   GtkAccelGroup *accel_group;
  74   GClosure      *accel_closure;
  75   GQuark         accel_quark;
  76
  77   GtkActionGroup *action_group;
  78
  79   /* list of proxy widgets */
  80   GSList *proxies;
  81 };
  82
  83 enum
  84 {
  85   ACTIVATE,
  86   LAST_SIGNAL
  87 };
  88
  89 enum
  90 {
  91   PROP_0,
  92   PROP_NAME,
  93   PROP_LABEL,
  94   PROP_SHORT_LABEL,
  95   PROP_TOOLTIP,
  96   PROP_STOCK_ID,
  97   PROP_VISIBLE_HORIZONTAL,
  98   PROP_VISIBLE_VERTICAL,
  99   PROP_VISIBLE_OVERFLOWN,
 100   PROP_IS_IMPORTANT,
 101   PROP_HIDE_IF_EMPTY,
 102   PROP_SENSITIVE,
 103   PROP_VISIBLE,
 104   PROP_ACTION_GROUP
 105 };
 106
 107 static void gtk_action_init       (GtkAction *action);
 108 static void gtk_action_class_init (GtkActionClass *class);
 109
 110 static GQuark       accel_path_id  = 0;
 111 static const gchar accel_path_key[] = "GtkAction::accel_path";
 112
 113 GType
 114 gtk_action_get_type (void)
 115 {
 116   static GtkType type = 0;
 117
 118   if (!type)
 119     {
 120       static const GTypeInfo type_info =
 121       {
 122         sizeof (GtkActionClass),
 123         (GBaseInitFunc) NULL,
 124         (GBaseFinalizeFunc) NULL,
 125         (GClassInitFunc) gtk_action_class_init,
 126         (GClassFinalizeFunc) NULL,
 127         NULL,
 128
 129         sizeof (GtkAction),
 130         0, /* n_preallocs */
 131         (GInstanceInitFunc) gtk_action_init,
 132       };
 133
 134       type = g_type_register_static (G_TYPE_OBJECT,
 135                                      I_("GtkAction"),
 136                                      &type_info, 0);
 137     }
 138   return type;
 139 }
 140
 141 static void gtk_action_finalize     (GObject *object);
 142 static void gtk_action_set_property (GObject         *object,
 143                                      guint            prop_id,
 144                                      const GValue    *value,
 145                                      GParamSpec      *pspec);
 146 static void gtk_action_get_property (GObject         *object,
 147                                      guint            prop_id,
 148                                      GValue          *value,
 149                                      GParamSpec      *pspec);
 150 static void gtk_action_set_action_group (GtkAction          *action,
 151                                          GtkActionGroup *action_group);
 152
 153 static GtkWidget *create_menu_item    (GtkAction *action);
 154 static GtkWidget *create_tool_item    (GtkAction *action);
 155 static void       connect_proxy       (GtkAction     *action,
 156                                        GtkWidget     *proxy);
 157 static void       disconnect_proxy    (GtkAction *action,
 158                                        GtkWidget *proxy);
 159 static void       closure_accel_activate (GClosure     *closure,
 160                                           GValue       *return_value,
 161                                           guint         n_param_values,
 162                                           const GValue *param_values,
 163                                           gpointer      invocation_hint,
 164                                           gpointer      marshal_data);
 165
 166 static GObjectClass *parent_class = NULL;
 167 static guint         action_signals[LAST_SIGNAL] = { 0 };
 168
 169
 170 static void
 171 gtk_action_class_init (GtkActionClass *klass)
 172 {
 173   GObjectClass *gobject_class;
 174
 175   accel_path_id = g_quark_from_static_string (accel_path_key);
 176
 177   parent_class = g_type_class_peek_parent (klass);
 178   gobject_class = G_OBJECT_CLASS (klass);
 179
 180   gobject_class->finalize     = gtk_action_finalize;
 181   gobject_class->set_property = gtk_action_set_property;
 182   gobject_class->get_property = gtk_action_get_property;
 183
 184   klass->activate = NULL;
 185
 186   klass->create_menu_item = create_menu_item;
 187   klass->create_tool_item = create_tool_item;
 188   klass->connect_proxy = connect_proxy;
 189   klass->disconnect_proxy = disconnect_proxy;
 190
 191   klass->menu_item_type = GTK_TYPE_IMAGE_MENU_ITEM;
 192   klass->toolbar_item_type = GTK_TYPE_TOOL_BUTTON;
 193
 194   g_object_class_install_property (gobject_class,
 195                                    PROP_NAME,
 196                                    g_param_spec_string ("name",
 197                                                         P_("Name"),
 198                                                         P_("A unique name for the action."),
 199                                                         NULL,
 200                                                         GTK_PARAM_READWRITE |
 201                                                         G_PARAM_CONSTRUCT_ONLY));
 202   g_object_class_install_property (gobject_class,
 203                                    PROP_LABEL,
 204                                    g_param_spec_string ("label",
 205                                                         P_("Label"),
 206                                                         P_("The label used for menu items and buttons "
 207                                                            "that activate this action."),
 208                                                         NULL,
 209                                                         GTK_PARAM_READWRITE));
 210   g_object_class_install_property (gobject_class,
 211                                    PROP_SHORT_LABEL,
 212                                    g_param_spec_string ("short-label",
 213                                                         P_("Short label"),
 214                                                         P_("A shorter label that may be used on toolbar buttons."),
 215                                                         NULL,
 216                                                         GTK_PARAM_READWRITE));
 217   g_object_class_install_property (gobject_class,
 218                                    PROP_TOOLTIP,
 219                                    g_param_spec_string ("tooltip",
 220                                                         P_("Tooltip"),
 221                                                         P_("A tooltip for this action."),
 222                                                         NULL,
 223                                                         GTK_PARAM_READWRITE));
 224   g_object_class_install_property (gobject_class,
 225                                    PROP_STOCK_ID,
 226                                    g_param_spec_string ("stock-id",
 227                                                         P_("Stock Icon"),
 228                                                         P_("The stock icon displayed in widgets representing "
 229                                                            "this action."),
 230                                                         NULL,
 231                                                         GTK_PARAM_READWRITE));
 232   g_object_class_install_property (gobject_class,
 233                                    PROP_VISIBLE_HORIZONTAL,
 234                                    g_param_spec_boolean ("visible-horizontal",
 235                                                          P_("Visible when horizontal"),
 236                                                          P_("Whether the toolbar item is visible when the toolbar "
 237                                                             "is in a horizontal orientation."),
 238                                                          TRUE,
 239                                                          GTK_PARAM_READWRITE));
 240   /**
 241    * GtkAction:visible-overflown:
 242    *
 243    * When %TRUE, toolitem proxies for this action are represented in the
 244    * toolbar overflow menu.
 245    *
 246    * Since: 2.6
 247    */
 248   g_object_class_install_property (gobject_class,
 249                                    PROP_VISIBLE_OVERFLOWN,
 250                                    g_param_spec_boolean ("visible-overflown",
 251                                                          P_("Visible when overflown"),
 252                                                          P_("When TRUE, toolitem proxies for this action "
 253                                                             "are represented in the toolbar overflow menu."),
 254                                                          TRUE,
 255                                                          GTK_PARAM_READWRITE));
 256   g_object_class_install_property (gobject_class,
 257                                    PROP_VISIBLE_VERTICAL,
 258                                    g_param_spec_boolean ("visible-vertical",
 259                                                          P_("Visible when vertical"),
 260                                                          P_("Whether the toolbar item is visible when the toolbar "
 261                                                             "is in a vertical orientation."),
 262                                                          TRUE,
 263                                                          GTK_PARAM_READWRITE));
 264   g_object_class_install_property (gobject_class,
 265                                    PROP_IS_IMPORTANT,
 266                                    g_param_spec_boolean ("is-important",
 267                                                          P_("Is important"),
 268                                                          P_("Whether the action is considered important. "
 269                                                             "When TRUE, toolitem proxies for this action "
 270                                                             "show text in GTK_TOOLBAR_BOTH_HORIZ mode."),
 271                                                          FALSE,
 272                                                          GTK_PARAM_READWRITE));
 273   g_object_class_install_property (gobject_class,
 274                                    PROP_HIDE_IF_EMPTY,
 275                                    g_param_spec_boolean ("hide-if-empty",
 276                                                          P_("Hide if empty"),
 277                                                          P_("When TRUE, empty menu proxies for this action are hidden."),
 278                                                          TRUE,
 279                                                          GTK_PARAM_READWRITE));
 280   g_object_class_install_property (gobject_class,
 281                                    PROP_SENSITIVE,
 282                                    g_param_spec_boolean ("sensitive",
 283                                                          P_("Sensitive"),
 284                                                          P_("Whether the action is enabled."),
 285                                                          TRUE,
 286                                                          GTK_PARAM_READWRITE));
 287   g_object_class_install_property (gobject_class,
 288                                    PROP_VISIBLE,
 289                                    g_param_spec_boolean ("visible",
 290                                                          P_("Visible"),
 291                                                          P_("Whether the action is visible."),
 292                                                          TRUE,
 293                                                          GTK_PARAM_READWRITE));
 294   g_object_class_install_property (gobject_class,
 295                                    PROP_ACTION_GROUP,
 296                                    g_param_spec_object ("action-group",
 297                                                          P_("Action Group"),
 298                                                          P_("The GtkActionGroup this GtkAction is associated with, or NULL (for internal use)."),
 299                                                          GTK_TYPE_ACTION_GROUP,
 300                                                          GTK_PARAM_READWRITE));
 301
 302   /**
 303    * GtkAction::activate:
 304    * @action: the #GtkAction
 305    *
 306    * The "activate" signal is emitted when the action is activated.
 307    *
 308    * Since: 2.4
 309    */
 310   action_signals[ACTIVATE] =
 311     g_signal_new (I_("activate"),
 312                   G_OBJECT_CLASS_TYPE (klass),
 313                   G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE,
 314                   G_STRUCT_OFFSET (GtkActionClass, activate),  NULL, NULL,
 315                   g_cclosure_marshal_VOID__VOID,
 316                   G_TYPE_NONE, 0);
 317
 318   g_type_class_add_private (gobject_class, sizeof (GtkActionPrivate));
 319 }
 320
 321
 322 static void
 323 gtk_action_init (GtkAction *action)
 324 {
 325   action->private_data = GTK_ACTION_GET_PRIVATE (action);
 326
 327   action->private_data->name = NULL;
 328   action->private_data->label = NULL;
 329   action->private_data->short_label = NULL;
 330   action->private_data->tooltip = NULL;
 331   action->private_data->stock_id = NULL;
 332   action->private_data->visible_horizontal = TRUE;
 333   action->private_data->visible_vertical   = TRUE;
 334   action->private_data->visible_overflown  = TRUE;
 335   action->private_data->is_important = FALSE;
 336   action->private_data->hide_if_empty = TRUE;
 337
 338   action->private_data->sensitive = TRUE;
 339   action->private_data->visible = TRUE;
 340
 341   action->private_data->label_set = FALSE;
 342   action->private_data->short_label_set = FALSE;
 343
 344   action->private_data->accel_count = 0;
 345   action->private_data->accel_group = NULL;
 346   action->private_data->accel_quark = 0;
 347   action->private_data->accel_closure =
 348     g_closure_new_object (sizeof (GClosure), G_OBJECT (action));
 349   g_closure_set_marshal (action->private_data->accel_closure,
 350                          closure_accel_activate);
 351   g_closure_ref (action->private_data->accel_closure);
 352   g_closure_sink (action->private_data->accel_closure);
 353
 354   action->private_data->action_group = NULL;
 355
 356   action->private_data->proxies = NULL;
 357 }
 358
 359 /**
 360  * gtk_action_new:
 361  * @name: A unique name for the action
 362  * @label: the label displayed in menu items and on buttons
 363  * @tooltip: a tooltip for the action
 364  * @stock_id: the stock icon to display in widgets representing the action
 365  *
 366  * Creates a new #GtkAction object. To add the action to a
 367  * #GtkActionGroup and set the accelerator for the action,
 368  * call gtk_action_group_add_action_with_accel().
 369  * See <xref linkend="XML-UI"/> for information on allowed action
 370  * names.
 371  *
 372  * Return value: a new #GtkAction
 373  *
 374  * Since: 2.4
 375  */
 376 GtkAction *
 377 gtk_action_new (const gchar *name,
 378                 const gchar *label,
 379                 const gchar *tooltip,
 380                 const gchar *stock_id)
 381 {
 382   GtkAction *action;
 383
 384   action = g_object_new (GTK_TYPE_ACTION,
 385                          "name", name,
 386                          "label", label,
 387                          "tooltip", tooltip,
 388                          "stock_id", stock_id,
 389                          NULL);
 390
 391   return action;
 392 }
 393
 394 static void
 395 gtk_action_finalize (GObject *object)
 396 {
 397   GtkAction *action;
 398   action = GTK_ACTION (object);
 399
 400   g_free (action->private_data->name);
 401   g_free (action->private_data->label);
 402   g_free (action->private_data->short_label);
 403   g_free (action->private_data->tooltip);
 404   g_free (action->private_data->stock_id);
 405
 406   g_closure_unref (action->private_data->accel_closure);
 407   if (action->private_data->accel_group)
 408     g_object_unref (action->private_data->accel_group);
 409
 410   G_OBJECT_CLASS (parent_class)->finalize (object);
 411 }
 412
 413 static void
 414 gtk_action_set_property (GObject         *object,
 415                          guint            prop_id,
 416                          const GValue    *value,
 417                          GParamSpec      *pspec)
 418 {
 419   GtkAction *action;
 420   gchar *tmp;
 421
 422   action = GTK_ACTION (object);
 423
 424   switch (prop_id)
 425     {
 426     case PROP_NAME:
 427       tmp = action->private_data->name;
 428       action->private_data->name = g_value_dup_string (value);
 429       g_free (tmp);
 430       break;
 431     case PROP_LABEL:
 432       tmp = action->private_data->label;
 433       action->private_data->label = g_value_dup_string (value);
 434       g_free (tmp);
 435       action->private_data->label_set = (action->private_data->label != NULL);
 436       /* if label is unset, then use the label from the stock item */
 437       if (!action->private_data->label_set && action->private_data->stock_id)
 438         {
 439           GtkStockItem stock_item;
 440
 441           if (gtk_stock_lookup (action->private_data->stock_id, &stock_item))
 442             action->private_data->label = g_strdup (stock_item.label);
 443         }
 444       /* if short_label is unset, set short_label=label */
 445       if (!action->private_data->short_label_set)
 446         {
 447           tmp = action->private_data->short_label;
 448           action->private_data->short_label = g_strdup (action->private_data->label);
 449           g_free (tmp);
 450           g_object_notify (object, "short-label");
 451         }
 452       break;
 453     case PROP_SHORT_LABEL:
 454       tmp = action->private_data->short_label;
 455       action->private_data->short_label = g_value_dup_string (value);
 456       g_free (tmp);
 457       action->private_data->short_label_set = (action->private_data->short_label != NULL);
 458       /* if short_label is unset, then use the value of label */
 459       if (!action->private_data->short_label_set)
 460         {
 461           action->private_data->short_label = g_strdup (action->private_data->label);
 462         }
 463       break;
 464     case PROP_TOOLTIP:
 465       tmp = action->private_data->tooltip;
 466       action->private_data->tooltip = g_value_dup_string (value);
 467       g_free (tmp);
 468       break;
 469     case PROP_STOCK_ID:
 470       tmp = action->private_data->stock_id;
 471       action->private_data->stock_id = g_value_dup_string (value);
 472       g_free (tmp);
 473       /* update label and short_label if appropriate */
 474       if (!action->private_data->label_set)
 475         {
 476           GtkStockItem stock_item;
 477
 478           g_free (action->private_data->label);
 479           if (gtk_stock_lookup (action->private_data->stock_id, &stock_item))
 480             action->private_data->label = g_strdup (stock_item.label);
 481           else
 482             action->private_data->label = NULL;
 483           g_object_notify (object, "label");
 484         }
 485       if (!action->private_data->short_label_set)
 486         {
 487           tmp = action->private_data->short_label;
 488           action->private_data->short_label = g_strdup (action->private_data->label);
 489           g_free (tmp);
 490           g_object_notify (object, "short-label");
 491         }
 492       break;
 493     case PROP_VISIBLE_HORIZONTAL:
 494       action->private_data->visible_horizontal = g_value_get_boolean (value);
 495       break;
 496     case PROP_VISIBLE_VERTICAL:
 497       action->private_data->visible_vertical = g_value_get_boolean (value);
 498       break;
 499     case PROP_VISIBLE_OVERFLOWN:
 500       action->private_data->visible_overflown = g_value_get_boolean (value);
 501       break;
 502     case PROP_IS_IMPORTANT:
 503       action->private_data->is_important = g_value_get_boolean (value);
 504       break;
 505     case PROP_HIDE_IF_EMPTY:
 506       action->private_data->hide_if_empty = g_value_get_boolean (value);
 507       break;
 508     case PROP_SENSITIVE:
 509       action->private_data->sensitive = g_value_get_boolean (value);
 510       break;
 511     case PROP_VISIBLE:
 512       action->private_data->visible = g_value_get_boolean (value);
 513       break;
 514     case PROP_ACTION_GROUP:
 515       gtk_action_set_action_group (action, g_value_get_object (value));
 516       break;
 517     default:
 518       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 519       break;
 520     }
 521 }
 522
 523 static void
 524 gtk_action_get_property (GObject    *object,
 525                          guint       prop_id,
 526                          GValue     *value,
 527                          GParamSpec *pspec)
 528 {
 529   GtkAction *action;
 530
 531   action = GTK_ACTION (object);
 532
 533   switch (prop_id)
 534     {
 535     case PROP_NAME:
 536       g_value_set_string (value, action->private_data->name);
 537       break;
 538     case PROP_LABEL:
 539       g_value_set_string (value, action->private_data->label);
 540       break;
 541     case PROP_SHORT_LABEL:
 542       g_value_set_string (value, action->private_data->short_label);
 543       break;
 544     case PROP_TOOLTIP:
 545       g_value_set_string (value, action->private_data->tooltip);
 546       break;
 547     case PROP_STOCK_ID:
 548       g_value_set_string (value, action->private_data->stock_id);
 549       break;
 550     case PROP_VISIBLE_HORIZONTAL:
 551       g_value_set_boolean (value, action->private_data->visible_horizontal);
 552       break;
 553     case PROP_VISIBLE_VERTICAL:
 554       g_value_set_boolean (value, action->private_data->visible_vertical);
 555       break;
 556     case PROP_VISIBLE_OVERFLOWN:
 557       g_value_set_boolean (value, action->private_data->visible_overflown);
 558       break;
 559     case PROP_IS_IMPORTANT:
 560       g_value_set_boolean (value, action->private_data->is_important);
 561       break;
 562     case PROP_HIDE_IF_EMPTY:
 563       g_value_set_boolean (value, action->private_data->hide_if_empty);
 564       break;
 565     case PROP_SENSITIVE:
 566       g_value_set_boolean (value, action->private_data->sensitive);
 567       break;
 568     case PROP_VISIBLE:
 569       g_value_set_boolean (value, action->private_data->visible);
 570       break;
 571     case PROP_ACTION_GROUP:
 572       g_value_set_object (value, action->private_data->action_group);
 573       break;
 574     default:
 575       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 576       break;
 577     }
 578 }
 579
 580 static GtkWidget *
 581 create_menu_item (GtkAction *action)
 582 {
 583   GType menu_item_type;
 584
 585   menu_item_type = GTK_ACTION_GET_CLASS (action)->menu_item_type;
 586
 587   return g_object_new (menu_item_type, NULL);
 588 }
 589
 590 static GtkWidget *
 591 create_tool_item (GtkAction *action)
 592 {
 593   GType toolbar_item_type;
 594
 595   toolbar_item_type = GTK_ACTION_GET_CLASS (action)->toolbar_item_type;
 596
 597   return g_object_new (toolbar_item_type, NULL);
 598 }
 599
 600 static void
 601 remove_proxy (GtkWidget *proxy,
 602               GtkAction *action)
 603 {
 604   if (GTK_IS_MENU_ITEM (proxy))
 605     gtk_action_disconnect_accelerator (action);
 606
 607   action->private_data->proxies = g_slist_remove (action->private_data->proxies, proxy);
 608 }
 609
 610 static void
 611 gtk_action_sync_sensitivity (GtkAction  *action,
 612                              GParamSpec *pspec,
 613                              GtkWidget  *proxy)
 614 {
 615   gtk_widget_set_sensitive (proxy, gtk_action_is_sensitive (action));
 616 }
 617
 618 static void
 619 gtk_action_sync_property (GtkAction  *action,
 620                           GParamSpec *pspec,
 621                           GtkWidget  *proxy)
 622 {
 623   const gchar *property;
 624   GValue value = { 0, };
 625
 626   property = g_param_spec_get_name (pspec);
 627
 628   g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
 629   g_object_get_property (G_OBJECT (action), property, &value);
 630
 631   g_object_set_property (G_OBJECT (proxy), property, &value);
 632   g_value_unset (&value);
 633 }
 634
 635 /**
 636  * _gtk_action_sync_menu_visible:
 637  * @action: a #GtkAction, or %NULL to determine the action from @proxy
 638  * @proxy: a proxy menu item
 639  * @empty: whether the submenu attached to @proxy is empty
 640  *
 641  * Updates the visibility of @proxy from the visibility of @action
 642  * according to the following rules:
 643  * <itemizedlist>
 644  * <listitem><para>if @action is invisible, @proxy is too
 645  * </para></listitem>
 646  * <listitem><para>if @empty is %TRUE, hide @proxy unless the "hide-if-empty"
 647  *   property of @action indicates otherwise
 648  * </para></listitem>
 649  * </itemizedlist>
 650  *
 651  * This function is used in the implementation of #GtkUIManager.
 652  **/
 653 void
 654 _gtk_action_sync_menu_visible (GtkAction *action,
 655                                GtkWidget *proxy,
 656                                gboolean   empty)
 657 {
 658   gboolean visible, hide_if_empty;
 659
 660   g_return_if_fail (GTK_IS_MENU_ITEM (proxy));
 661   g_return_if_fail (action == NULL || GTK_IS_ACTION (action));
 662
 663   if (action == NULL)
 664     action = g_object_get_data (G_OBJECT (proxy), "gtk-action");
 665
 666   visible = gtk_action_is_visible (action);
 667   hide_if_empty = action->private_data->hide_if_empty;
 668
 669   if (visible && !(empty && hide_if_empty))
 670     gtk_widget_show (proxy);
 671   else
 672     gtk_widget_hide (proxy);
 673 }
 674
 675 gboolean _gtk_menu_is_empty (GtkWidget *menu);
 676
 677 static void
 678 gtk_action_sync_visible (GtkAction  *action,
 679                          GParamSpec *pspec,
 680                          GtkWidget  *proxy)
 681 {
 682   if (GTK_IS_MENU_ITEM (proxy))
 683     {
 684       GtkWidget *menu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (proxy));
 685
 686       _gtk_action_sync_menu_visible (action, proxy, _gtk_menu_is_empty (menu));
 687     }
 688   else
 689     {
 690       if (gtk_action_is_visible (action))
 691         gtk_widget_show (proxy);
 692       else
 693         gtk_widget_hide (proxy);
 694     }
 695 }
 696
 697 static void
 698 gtk_action_sync_label (GtkAction  *action,
 699                        GParamSpec *pspec,
 700                        GtkWidget  *proxy)
 701 {
 702   GtkWidget *label = NULL;
 703
 704   g_return_if_fail (GTK_IS_MENU_ITEM (proxy));
 705   label = GTK_BIN (proxy)->child;
 706
 707   if (GTK_IS_LABEL (label))
 708     gtk_label_set_label (GTK_LABEL (label), action->private_data->label);
 709 }
 710
 711 static void
 712 gtk_action_sync_short_label (GtkAction  *action,
 713                              GParamSpec *pspec,
 714                              GtkWidget  *proxy)
 715 {
 716   GValue value = { 0, };
 717
 718   g_value_init (&value, G_TYPE_STRING);
 719   g_object_get_property (G_OBJECT (action), "short-label", &value);
 720
 721   g_object_set_property (G_OBJECT (proxy), "label", &value);
 722   g_value_unset (&value);
 723 }
 724
 725 static void
 726 gtk_action_sync_stock_id (GtkAction  *action,
 727                           GParamSpec *pspec,
 728                           GtkWidget  *proxy)
 729 {
 730   GtkWidget *image = NULL;
 731
 732   if (GTK_IS_IMAGE_MENU_ITEM (proxy))
 733     {
 734       image = gtk_image_menu_item_get_image (GTK_IMAGE_MENU_ITEM (proxy));
 735
 736       if (GTK_IS_IMAGE (image))
 737         gtk_image_set_from_stock (GTK_IMAGE (image),
 738                                   action->private_data->stock_id, GTK_ICON_SIZE_MENU);
 739     }
 740 }
 741
 742 static void
 743 gtk_action_sync_button_stock_id (GtkAction  *action,
 744                                  GParamSpec *pspec,
 745                                  GtkWidget  *proxy)
 746 {
 747   g_object_set (G_OBJECT (proxy),
 748                 "stock-id",
 749                 action->private_data->stock_id,
 750                 NULL);
 751 }
 752
 753 static void
 754 gtk_action_sync_tooltip (GtkAction  *action,
 755                          GParamSpec *pspec,
 756                          GtkWidget  *proxy)
 757 {
 758   g_return_if_fail (GTK_IS_TOOL_ITEM (proxy));
 759
 760   if (GTK_IS_TOOLBAR (gtk_widget_get_parent (proxy)))
 761     {
 762       GtkToolbar *toolbar = GTK_TOOLBAR (gtk_widget_get_parent (proxy));
 763
 764       gtk_tool_item_set_tooltip (GTK_TOOL_ITEM (proxy),
 765                                  toolbar->tooltips,
 766                                  action->private_data->tooltip,
 767                                  NULL);
 768     }
 769 }
 770
 771
 772 static gboolean
 773 gtk_action_create_menu_proxy (GtkToolItem *tool_item,
 774                               GtkAction   *action)
 775 {
 776   GtkWidget *menu_item;
 777
 778   if (action->private_data->visible_overflown)
 779     {
 780       menu_item = gtk_action_create_menu_item (action);
 781
 782       g_object_ref (menu_item);
 783       gtk_object_sink (GTK_OBJECT (menu_item));
 784
 785       gtk_tool_item_set_proxy_menu_item (tool_item,
 786                                          "gtk-action-menu-item", menu_item);
 787       g_object_unref (menu_item);
 788     }
 789   else
 790     gtk_tool_item_set_proxy_menu_item (tool_item,
 791                                        "gtk-action-menu-item", NULL);
 792
 793   return TRUE;
 794 }
 795
 796 static void
 797 connect_proxy (GtkAction     *action,
 798                GtkWidget     *proxy)
 799 {
 800   g_object_ref (action);
 801   g_object_set_data_full (G_OBJECT (proxy), I_("gtk-action"), action,
 802                           g_object_unref);
 803
 804   /* add this widget to the list of proxies */
 805   action->private_data->proxies = g_slist_prepend (action->private_data->proxies, proxy);
 806   g_signal_connect (proxy, "destroy",
 807                     G_CALLBACK (remove_proxy), action);
 808
 809   g_signal_connect_object (action, "notify::sensitive",
 810                            G_CALLBACK (gtk_action_sync_sensitivity), proxy, 0);
 811   gtk_widget_set_sensitive (proxy, gtk_action_is_sensitive (action));
 812
 813   g_signal_connect_object (action, "notify::visible",
 814                            G_CALLBACK (gtk_action_sync_visible), proxy, 0);
 815   if (gtk_action_is_visible (action))
 816     gtk_widget_show (proxy);
 817   else
 818     gtk_widget_hide (proxy);
 819   gtk_widget_set_no_show_all (proxy, TRUE);
 820
 821   if (GTK_IS_MENU_ITEM (proxy))
 822     {
 823       GtkWidget *label;
 824       /* menu item specific synchronisers ... */
 825
 826       if (action->private_data->accel_quark)
 827         {
 828           gtk_action_connect_accelerator (action);
 829           gtk_menu_item_set_accel_path (GTK_MENU_ITEM (proxy),
 830                                         g_quark_to_string (action->private_data->accel_quark));
 831         }
 832
 833       label = GTK_BIN (proxy)->child;
 834
 835       /* make sure label is a label */
 836       if (label && !GTK_IS_LABEL (label))
 837         {
 838           gtk_container_remove (GTK_CONTAINER (proxy), label);
 839           label = NULL;
 840         }
 841
 842       if (!label)
 843         label = g_object_new (GTK_TYPE_ACCEL_LABEL,
 844                               "use_underline", TRUE,
 845                               "xalign", 0.0,
 846                               "visible", TRUE,
 847                               "parent", proxy,
 848                               NULL);
 849
 850       if (GTK_IS_ACCEL_LABEL (label) && action->private_data->accel_quark)
 851         g_object_set (label,
 852                       "accel_closure", action->private_data->accel_closure,
 853                       NULL);
 854
 855       gtk_label_set_label (GTK_LABEL (label), action->private_data->label);
 856       g_signal_connect_object (action, "notify::label",
 857                                G_CALLBACK (gtk_action_sync_label), proxy, 0);
 858
 859       if (GTK_IS_IMAGE_MENU_ITEM (proxy))
 860         {
 861           GtkWidget *image;
 862
 863           image = gtk_image_menu_item_get_image (GTK_IMAGE_MENU_ITEM (proxy));
 864           if (image && !GTK_IS_IMAGE (image))
 865             {
 866               gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (proxy), NULL);
 867               image = NULL;
 868             }
 869           if (!image)
 870             {
 871               image = gtk_image_new_from_stock (NULL,
 872                                                 GTK_ICON_SIZE_MENU);
 873               gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (proxy),
 874                                              image);
 875               gtk_widget_show (image);
 876             }
 877           gtk_image_set_from_stock (GTK_IMAGE (image),
 878                                     action->private_data->stock_id, GTK_ICON_SIZE_MENU);
 879           g_signal_connect_object (action, "notify::stock-id",
 880                                    G_CALLBACK (gtk_action_sync_stock_id),
 881                                    proxy, 0);
 882         }
 883
 884       if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (proxy)) == NULL)
 885         g_signal_connect_object (proxy, "activate",
 886                                  G_CALLBACK (gtk_action_activate), action,
 887                                  G_CONNECT_SWAPPED);
 888
 889     }
 890   else if (GTK_IS_TOOL_ITEM (proxy))
 891     {
 892       GParamSpec *pspec;
 893
 894       /* toolbar item specific synchronisers ... */
 895
 896       g_object_set (proxy,
 897                     "visible_horizontal", action->private_data->visible_horizontal,
 898                     "visible_vertical",   action->private_data->visible_vertical,
 899                     "is_important", action->private_data->is_important,
 900                     NULL);
 901
 902       pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (action),
 903                                             "tooltip");
 904       gtk_action_sync_tooltip (action, pspec, proxy);
 905
 906       g_signal_connect_object (action, "notify::visible-horizontal",
 907                                G_CALLBACK (gtk_action_sync_property),
 908                                proxy, 0);
 909       g_signal_connect_object (action, "notify::visible-vertical",
 910                                G_CALLBACK (gtk_action_sync_property),
 911                                proxy, 0);
 912       g_signal_connect_object (action, "notify::is-important",
 913                                G_CALLBACK (gtk_action_sync_property),
 914                                proxy, 0);
 915       g_signal_connect_object (action, "notify::tooltip",
 916                                G_CALLBACK (gtk_action_sync_tooltip),
 917                                proxy, 0);
 918
 919       g_signal_connect_object (proxy, "create_menu_proxy",
 920                                G_CALLBACK (gtk_action_create_menu_proxy),
 921                                action, 0);
 922
 923       gtk_tool_item_rebuild_menu (GTK_TOOL_ITEM (proxy));
 924
 925       /* toolbar button specific synchronisers ... */
 926       if (GTK_IS_TOOL_BUTTON (proxy))
 927         {
 928           g_object_set (proxy,
 929                         "label", action->private_data->short_label,
 930                         "use_underline", TRUE,
 931                         "stock_id", action->private_data->stock_id,
 932                         NULL);
 933
 934           g_signal_connect_object (action, "notify::short-label",
 935                                    G_CALLBACK (gtk_action_sync_short_label),
 936                                    proxy, 0);
 937           g_signal_connect_object (action, "notify::stock-id",
 938                                    G_CALLBACK (gtk_action_sync_property),
 939                                    proxy, 0);
 940           g_signal_connect_object (proxy, "clicked",
 941                                    G_CALLBACK (gtk_action_activate), action,
 942                                    G_CONNECT_SWAPPED);
 943         }
 944     }
 945   else if (GTK_IS_BUTTON (proxy))
 946     {
 947       /* button specific synchronisers ... */
 948       if (gtk_button_get_use_stock (GTK_BUTTON (proxy)))
 949         {
 950           /* synchronise stock-id */
 951           g_object_set (proxy,
 952                         "stock-id", action->private_data->stock_id,
 953                         NULL);
 954           g_signal_connect_object (action, "notify::stock-id",
 955                                    G_CALLBACK (gtk_action_sync_button_stock_id),
 956                                    proxy, 0);
 957         }
 958       else if (GTK_BIN (proxy)->child == NULL ||
 959                GTK_IS_LABEL (GTK_BIN (proxy)->child))
 960         {
 961           /* synchronise the label */
 962           g_object_set (proxy,
 963                         "label", action->private_data->short_label,
 964                         "use_underline", TRUE,
 965                         NULL);
 966           g_signal_connect_object (action, "notify::short-label",
 967                                    G_CALLBACK (gtk_action_sync_short_label),
 968                                    proxy, 0);
 969
 970         }
 971
 972       /* we leave the button alone if there is a custom child */
 973       g_signal_connect_object (proxy, "clicked",
 974                                G_CALLBACK (gtk_action_activate), action,
 975                                G_CONNECT_SWAPPED);
 976     }
 977
 978   if (action->private_data->action_group)
 979     _gtk_action_group_emit_connect_proxy (action->private_data->action_group, action, proxy);
 980 }
 981
 982 static void
 983 disconnect_proxy (GtkAction *action,
 984                   GtkWidget *proxy)
 985 {
 986   g_object_set_data (G_OBJECT (proxy), I_("gtk-action"), NULL);
 987
 988   /* remove proxy from list of proxies */
 989   g_signal_handlers_disconnect_by_func (proxy,
 990                                         G_CALLBACK (remove_proxy),
 991                                         action);
 992   remove_proxy (proxy, action);
 993
 994   /* disconnect the activate handler */
 995   g_signal_handlers_disconnect_by_func (proxy,
 996                                         G_CALLBACK (gtk_action_activate),
 997                                         action);
 998
 999   /* disconnect handlers for notify::* signals */
1000   g_signal_handlers_disconnect_by_func (action,
1001                                         G_CALLBACK (gtk_action_sync_sensitivity),
1002                                         proxy);
1003   g_signal_handlers_disconnect_by_func (action,
1004                                         G_CALLBACK (gtk_action_sync_property),
1005                                         proxy);
1006
1007   g_signal_handlers_disconnect_by_func (action,
1008                                 G_CALLBACK (gtk_action_sync_stock_id), proxy);
1009
1010   /* menu item specific synchronisers ... */
1011   g_signal_handlers_disconnect_by_func (action,
1012                                         G_CALLBACK (gtk_action_sync_label),
1013                                         proxy);
1014
1015   /* toolbar button specific synchronisers ... */
1016   g_signal_handlers_disconnect_by_func (action,
1017                                         G_CALLBACK (gtk_action_sync_short_label),
1018                                         proxy);
1019
1020   g_signal_handlers_disconnect_by_func (proxy,
1021                                         G_CALLBACK (gtk_action_create_menu_proxy),
1022                                         action);
1023
1024   if (action->private_data->action_group)
1025     _gtk_action_group_emit_disconnect_proxy (action->private_data->action_group, action, proxy);
1026 }
1027
1028 void
1029 _gtk_action_emit_activate (GtkAction *action)
1030 {
1031   GtkActionGroup *group = action->private_data->action_group;
1032
1033   if (group != NULL)
1034     {
1035       g_object_ref (group);
1036       _gtk_action_group_emit_pre_activate (group, action);
1037     }
1038
1039     g_signal_emit (action, action_signals[ACTIVATE], 0);
1040
1041   if (group != NULL)
1042     {
1043       _gtk_action_group_emit_post_activate (group, action);
1044       g_object_unref (group);
1045     }
1046 }
1047
1048 /**
1049  * gtk_action_activate:
1050  * @action: the action object
1051  *
1052  * Emits the "activate" signal on the specified action, if it isn't
1053  * insensitive. This gets called by the proxy widgets when they get
1054  * activated.
1055  *
1056  * It can also be used to manually activate an action.
1057  *
1058  * Since: 2.4
1059  */
1060 void
1061 gtk_action_activate (GtkAction *action)
1062 {
1063   g_return_if_fail (GTK_IS_ACTION (action));
1064
1065   if (gtk_action_is_sensitive (action))
1066     _gtk_action_emit_activate (action);
1067 }
1068
1069 /**
1070  * gtk_action_create_icon:
1071  * @action: the action object
1072  * @icon_size: the size of the icon that should be created.
1073  *
1074  * This function is intended for use by action implementations to
1075  * create icons displayed in the proxy widgets.
1076  *
1077  * Returns: a widget that displays the icon for this action.
1078  *
1079  * Since: 2.4
1080  */
1081 GtkWidget *
1082 gtk_action_create_icon (GtkAction *action, GtkIconSize icon_size)
1083 {
1084   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1085
1086   if (action->private_data->stock_id)
1087     return gtk_image_new_from_stock (action->private_data->stock_id, icon_size);
1088   else
1089     return NULL;
1090 }
1091
1092 /**
1093  * gtk_action_create_menu_item:
1094  * @action: the action object
1095  *
1096  * Creates a menu item widget that proxies for the given action.
1097  *
1098  * Returns: a menu item connected to the action.
1099  *
1100  * Since: 2.4
1101  */
1102 GtkWidget *
1103 gtk_action_create_menu_item (GtkAction *action)
1104 {
1105   GtkWidget *menu_item;
1106
1107   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1108
1109   menu_item = (* GTK_ACTION_GET_CLASS (action)->create_menu_item) (action);
1110
1111   (* GTK_ACTION_GET_CLASS (action)->connect_proxy) (action, menu_item);
1112
1113   return menu_item;
1114 }
1115
1116 /**
1117  * gtk_action_create_tool_item:
1118  * @action: the action object
1119  *
1120  * Creates a toolbar item widget that proxies for the given action.
1121  *
1122  * Returns: a toolbar item connected to the action.
1123  *
1124  * Since: 2.4
1125  */
1126 GtkWidget *
1127 gtk_action_create_tool_item (GtkAction *action)
1128 {
1129   GtkWidget *button;
1130
1131   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1132
1133   button = (* GTK_ACTION_GET_CLASS (action)->create_tool_item) (action);
1134
1135   (* GTK_ACTION_GET_CLASS (action)->connect_proxy) (action, button);
1136
1137   return button;
1138 }
1139
1140 /**
1141  * gtk_action_connect_proxy:
1142  * @action: the action object
1143  * @proxy: the proxy widget
1144  *
1145  * Connects a widget to an action object as a proxy.  Synchronises
1146  * various properties of the action with the widget (such as label
1147  * text, icon, tooltip, etc), and attaches a callback so that the
1148  * action gets activated when the proxy widget does.
1149  *
1150  * If the widget is already connected to an action, it is disconnected
1151  * first.
1152  *
1153  * Since: 2.4
1154  */
1155 void
1156 gtk_action_connect_proxy (GtkAction *action,
1157                           GtkWidget *proxy)
1158 {
1159   GtkAction *prev_action;
1160
1161   g_return_if_fail (GTK_IS_ACTION (action));
1162   g_return_if_fail (GTK_IS_WIDGET (proxy));
1163
1164   prev_action = g_object_get_data (G_OBJECT (proxy), "gtk-action");
1165
1166   if (prev_action)
1167     (* GTK_ACTION_GET_CLASS (action)->disconnect_proxy) (prev_action, proxy);
1168
1169   (* GTK_ACTION_GET_CLASS (action)->connect_proxy) (action, proxy);
1170 }
1171
1172 /**
1173  * gtk_action_disconnect_proxy:
1174  * @action: the action object
1175  * @proxy: the proxy widget
1176  *
1177  * Disconnects a proxy widget from an action.
1178  * Does <emphasis>not</emphasis> destroy the widget, however.
1179  *
1180  * Since: 2.4
1181  */
1182 void
1183 gtk_action_disconnect_proxy (GtkAction *action,
1184                              GtkWidget *proxy)
1185 {
1186   g_return_if_fail (GTK_IS_ACTION (action));
1187   g_return_if_fail (GTK_IS_WIDGET (proxy));
1188
1189   g_return_if_fail (g_object_get_data (G_OBJECT (proxy), "gtk-action") == action);
1190
1191   (* GTK_ACTION_GET_CLASS (action)->disconnect_proxy) (action, proxy);
1192 }
1193
1194 /**
1195  * gtk_action_get_proxies:
1196  * @action: the action object
1197  *
1198  * Returns the proxy widgets for an action.
1199  *
1200  * Return value: a #GSList of proxy widgets. The list is owned by the action and
1201  * must not be modified.
1202  *
1203  * Since: 2.4
1204  **/
1205 GSList*
1206 gtk_action_get_proxies (GtkAction *action)
1207 {
1208   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1209
1210   return action->private_data->proxies;
1211 }
1212
1213
1214 /**
1215  * gtk_action_get_name:
1216  * @action: the action object
1217  *
1218  * Returns the name of the action.
1219  *
1220  * Return value: the name of the action. The string belongs to GTK+ and should not
1221  *   be freed.
1222  *
1223  * Since: 2.4
1224  **/
1225 G_CONST_RETURN gchar *
1226 gtk_action_get_name (GtkAction *action)
1227 {
1228   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1229
1230   return action->private_data->name;
1231 }
1232
1233 /**
1234  * gtk_action_is_sensitive:
1235  * @action: the action object
1236  *
1237  * Returns whether the action is effectively sensitive.
1238  *
1239  * Return value: %TRUE if the action and its associated action group
1240  * are both sensitive.
1241  *
1242  * Since: 2.4
1243  **/
1244 gboolean
1245 gtk_action_is_sensitive (GtkAction *action)
1246 {
1247   GtkActionPrivate *priv;
1248   g_return_val_if_fail (GTK_IS_ACTION (action), FALSE);
1249
1250   priv = action->private_data;
1251   return priv->sensitive &&
1252     (priv->action_group == NULL ||
1253      gtk_action_group_get_sensitive (priv->action_group));
1254 }
1255
1256 /**
1257  * gtk_action_get_sensitive:
1258  * @action: the action object
1259  *
1260  * Returns whether the action itself is sensitive. Note that this doesn't
1261  * necessarily mean effective sensitivity. See gtk_action_is_sensitive()
1262  * for that.
1263  *
1264  * Return value: %TRUE if the action itself is sensitive.
1265  *
1266  * Since: 2.4
1267  **/
1268 gboolean
1269 gtk_action_get_sensitive (GtkAction *action)
1270 {
1271   g_return_val_if_fail (GTK_IS_ACTION (action), FALSE);
1272
1273   return action->private_data->sensitive;
1274 }
1275
1276 /**
1277  * gtk_action_set_sensitive:
1278  * @action: the action object
1279  * @sensitive: %TRUE to make the action sensitive
1280  *
1281  * Sets the ::sensitive property of the action to @sensitive. Note that
1282  * this doesn't necessarily mean effective sensitivity. See
1283  * gtk_action_is_sensitive()
1284  * for that.
1285  *
1286  * Since: 2.6
1287  **/
1288 void
1289 gtk_action_set_sensitive (GtkAction *action,
1290                           gboolean   sensitive)
1291 {
1292   g_return_if_fail (GTK_IS_ACTION (action));
1293
1294   sensitive = sensitive != FALSE;
1295
1296   if (action->private_data->sensitive != sensitive)
1297     {
1298       action->private_data->sensitive = sensitive;
1299
1300       g_object_notify (G_OBJECT (action), "sensitive");
1301     }
1302 }
1303
1304 /**
1305  * gtk_action_is_visible:
1306  * @action: the action object
1307  *
1308  * Returns whether the action is effectively visible.
1309  *
1310  * Return value: %TRUE if the action and its associated action group
1311  * are both visible.
1312  *
1313  * Since: 2.4
1314  **/
1315 gboolean
1316 gtk_action_is_visible (GtkAction *action)
1317 {
1318   GtkActionPrivate *priv;
1319   g_return_val_if_fail (GTK_IS_ACTION (action), FALSE);
1320
1321   priv = action->private_data;
1322   return priv->visible &&
1323     (priv->action_group == NULL ||
1324      gtk_action_group_get_visible (priv->action_group));
1325 }
1326
1327 /**
1328  * gtk_action_get_visible:
1329  * @action: the action object
1330  *
1331  * Returns whether the action itself is visible. Note that this doesn't
1332  * necessarily mean effective visibility. See gtk_action_is_sensitive()
1333  * for that.
1334  *
1335  * Return value: %TRUE if the action itself is visible.
1336  *
1337  * Since: 2.4
1338  **/
1339 gboolean
1340 gtk_action_get_visible (GtkAction *action)
1341 {
1342   g_return_val_if_fail (GTK_IS_ACTION (action), FALSE);
1343
1344   return action->private_data->visible;
1345 }
1346
1347 /**
1348  * gtk_action_set_visible:
1349  * @action: the action object
1350  * @visible: %TRUE to make the action visible
1351  *
1352  * Sets the ::visible property of the action to @visible. Note that
1353  * this doesn't necessarily mean effective visibility. See
1354  * gtk_action_is_visible()
1355  * for that.
1356  *
1357  * Since: 2.6
1358  **/
1359 void
1360 gtk_action_set_visible (GtkAction *action,
1361                         gboolean   visible)
1362 {
1363   g_return_if_fail (GTK_IS_ACTION (action));
1364
1365   visible = visible != FALSE;
1366
1367   if (action->private_data->visible != visible)
1368     {
1369       action->private_data->visible = visible;
1370
1371       g_object_notify (G_OBJECT (action), "visible");
1372     }
1373 }
1374
1375 /**
1376  * gtk_action_block_activate_from:
1377  * @action: the action object
1378  * @proxy: a proxy widget
1379  *
1380  * Disables calls to the gtk_action_activate()
1381  * function by signals on the given proxy widget.  This is used to
1382  * break notification loops for things like check or radio actions.
1383  *
1384  * This function is intended for use by action implementations.
1385  *
1386  * Since: 2.4
1387  */
1388 void
1389 gtk_action_block_activate_from (GtkAction *action,
1390                                 GtkWidget *proxy)
1391 {
1392   g_return_if_fail (GTK_IS_ACTION (action));
1393
1394   g_signal_handlers_block_by_func (proxy, G_CALLBACK (gtk_action_activate),
1395                                    action);
1396 }
1397
1398 /**
1399  * gtk_action_unblock_activate_from:
1400  * @action: the action object
1401  * @proxy: a proxy widget
1402  *
1403  * Re-enables calls to the gtk_action_activate()
1404  * function by signals on the given proxy widget.  This undoes the
1405  * blocking done by gtk_action_block_activate_from().
1406  *
1407  * This function is intended for use by action implementations.
1408  *
1409  * Since: 2.4
1410  */
1411 void
1412 gtk_action_unblock_activate_from (GtkAction *action,
1413                                   GtkWidget *proxy)
1414 {
1415   g_return_if_fail (GTK_IS_ACTION (action));
1416
1417   g_signal_handlers_unblock_by_func (proxy, G_CALLBACK (gtk_action_activate),
1418                                      action);
1419 }
1420
1421 static void
1422 closure_accel_activate (GClosure     *closure,
1423                         GValue       *return_value,
1424                         guint         n_param_values,
1425                         const GValue *param_values,
1426                         gpointer      invocation_hint,
1427                         gpointer      marshal_data)
1428 {
1429   if (gtk_action_is_sensitive (GTK_ACTION (closure->data)))
1430     {
1431       _gtk_action_emit_activate (GTK_ACTION (closure->data));
1432
1433       /* we handled the accelerator */
1434       g_value_set_boolean (return_value, TRUE);
1435     }
1436 }
1437
1438 static void
1439 gtk_action_set_action_group (GtkAction      *action,
1440                              GtkActionGroup *action_group)
1441 {
1442   g_return_if_fail (GTK_IS_ACTION (action));
1443
1444   if (action->private_data->action_group == NULL)
1445     g_return_if_fail (GTK_IS_ACTION_GROUP (action_group));
1446   else
1447     g_return_if_fail (action_group == NULL);
1448
1449   action->private_data->action_group = action_group;
1450 }
1451
1452 /**
1453  * gtk_action_set_accel_path:
1454  * @action: the action object
1455  * @accel_path: the accelerator path
1456  *
1457  * Sets the accel path for this action.  All proxy widgets associated
1458  * with the action will have this accel path, so that their
1459  * accelerators are consistent.
1460  *
1461  * Since: 2.4
1462  */
1463 void
1464 gtk_action_set_accel_path (GtkAction   *action,
1465                            const gchar *accel_path)
1466 {
1467   g_return_if_fail (GTK_IS_ACTION (action));
1468
1469   action->private_data->accel_quark = g_quark_from_string (accel_path);
1470 }
1471
1472 /**
1473  * gtk_action_get_accel_path:
1474  * @action: the action object
1475  *
1476  * Returns the accel path for this action.
1477  *
1478  * Since: 2.6
1479  *
1480  * Returns: the accel path for this action, or %NULL
1481  *   if none is set. The returned string is owned by GTK+
1482  *   and must not be freed or modified.
1483  */
1484 G_CONST_RETURN gchar *
1485 gtk_action_get_accel_path (GtkAction *action)
1486 {
1487   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1488
1489   if (action->private_data->accel_quark)
1490     return g_quark_to_string (action->private_data->accel_quark);
1491   else
1492     return NULL;
1493 }
1494
1495 /**
1496  * gtk_action_get_accel_closure:
1497  * @action: the action object
1498  *
1499  * Returns the accel closure for this action.
1500  *
1501  * Since: 2.8
1502  *
1503  * Returns: the accel closure for this action. The returned closure is
1504  *          owned by GTK+ and must not be unreffed or modified.
1505  */
1506 GClosure *
1507 gtk_action_get_accel_closure (GtkAction *action)
1508 {
1509   g_return_val_if_fail (GTK_IS_ACTION (action), NULL);
1510
1511   return action->private_data->accel_closure;
1512 }
1513
1514
1515 /**
1516  * gtk_action_set_accel_group:
1517  * @action: the action object
1518  * @accel_group: a #GtkAccelGroup or %NULL
1519  *
1520  * Sets the #GtkAccelGroup in which the accelerator for this action
1521  * will be installed.
1522  *
1523  * Since: 2.4
1524  **/
1525 void
1526 gtk_action_set_accel_group (GtkAction     *action,
1527                             GtkAccelGroup *accel_group)
1528 {
1529   g_return_if_fail (GTK_IS_ACTION (action));
1530   g_return_if_fail (accel_group == NULL || GTK_IS_ACCEL_GROUP (accel_group));
1531
1532   if (accel_group)
1533     g_object_ref (accel_group);
1534   if (action->private_data->accel_group)
1535     g_object_unref (action->private_data->accel_group);
1536
1537   action->private_data->accel_group = accel_group;
1538 }
1539
1540 /**
1541  * gtk_action_connect_accelerator:
1542  * @action: a #GtkAction
1543  *
1544  * Installs the accelerator for @action if @action has an
1545  * accel path and group. See gtk_action_set_accel_path() and
1546  * gtk_action_set_accel_group()
1547  *
1548  * Since multiple proxies may independently trigger the installation
1549  * of the accelerator, the @action counts the number of times this
1550  * function has been called and doesn't remove the accelerator until
1551  * gtk_action_disconnect_accelerator() has been called as many times.
1552  *
1553  * Since: 2.4
1554  **/
1555 void
1556 gtk_action_connect_accelerator (GtkAction *action)
1557 {
1558   g_return_if_fail (GTK_IS_ACTION (action));
1559
1560   if (!action->private_data->accel_quark ||
1561       !action->private_data->accel_group)
1562     return;
1563
1564   if (action->private_data->accel_count == 0)
1565     {
1566       const gchar *accel_path =
1567         g_quark_to_string (action->private_data->accel_quark);
1568
1569       gtk_accel_group_connect_by_path (action->private_data->accel_group,
1570                                        accel_path,
1571                                        action->private_data->accel_closure);
1572     }
1573
1574   action->private_data->accel_count++;
1575 }
1576
1577 /**
1578  * gtk_action_disconnect_accelerator:
1579  * @action: a #GtkAction
1580  *
1581  * Undoes the effect of one call to gtk_action_connect_accelerator().
1582  *
1583  * Since: 2.4
1584  **/
1585 void
1586 gtk_action_disconnect_accelerator (GtkAction *action)
1587 {
1588   g_return_if_fail (GTK_IS_ACTION (action));
1589
1590   if (!action->private_data->accel_quark ||
1591       !action->private_data->accel_group)
1592     return;
1593
1594   action->private_data->accel_count--;
1595
1596   if (action->private_data->accel_count == 0)
1597     gtk_accel_group_disconnect (action->private_data->accel_group,
1598                                 action->private_data->accel_closure);
1599 }
1600
1601 #define __GTK_ACTION_C__
1602 #include "gtkaliasdef.c"