Pileus Git - ~andy/gtk/blob - gtk/gtkwidget.h

   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 #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  28 #error "Only <gtk/gtk.h> can be included directly."
  29 #endif
  30
  31 #ifndef __GTK_WIDGET_H__
  32 #define __GTK_WIDGET_H__
  33
  34 #include <gdk/gdk.h>
  35 #include <gtk/gtkaccelgroup.h>
  36 #include <gtk/gtkobject.h>
  37 #include <gtk/gtkadjustment.h>
  38 #include <gtk/gtkstyle.h>
  39 #include <gtk/gtksettings.h>
  40 #include <atk/atk.h>
  41
  42 G_BEGIN_DECLS
  43
  44 /**
  45  * GtkWidgetFlags:
  46  * @GTK_TOPLEVEL: widgets without a real parent, as there are #GtkWindow<!-- -->s and
  47  *  #GtkMenu<!-- -->s have this flag set throughout their lifetime.
  48  *  Toplevel widgets always contain their own #GdkWindow.
  49  * @GTK_NO_WINDOW: Indicative for a widget that does not provide its own #GdkWindow.
  50  *  Visible action (e.g. drawing) is performed on the parent's #GdkWindow.
  51  * @GTK_REALIZED: Set by gtk_widget_realize(), unset by gtk_widget_unrealize().
  52  *  A realized widget has an associated #GdkWindow.
  53  * @GTK_MAPPED: Set by gtk_widget_map(), unset by gtk_widget_unmap().
  54  *  Only realized widgets can be mapped. It means that gdk_window_show()
  55  *  has been called on the widgets window(s).
  56  * @GTK_VISIBLE: Set by gtk_widget_show(), unset by gtk_widget_hide(). Implies that a
  57  *  widget will be mapped as soon as its parent is mapped.
  58  * @GTK_SENSITIVE: Set and unset by gtk_widget_set_sensitive().
  59  *  The sensitivity of a widget determines whether it will receive
  60  *  certain events (e.g. button or key presses). One premise for
  61  *  the widget's sensitivity is to have this flag set.
  62  * @GTK_PARENT_SENSITIVE: Set and unset by gtk_widget_set_sensitive() operations on the
  63  *  parents of the widget.
  64  *  This is the second premise for the widget's sensitivity. Once
  65  *  it has %GTK_SENSITIVE and %GTK_PARENT_SENSITIVE set, its state is
  66  *  effectively sensitive. This is expressed (and can be examined) by
  67  *  the #GTK_WIDGET_IS_SENSITIVE macro.
  68  * @GTK_CAN_FOCUS: Determines whether a widget is able to handle focus grabs.
  69  * @GTK_HAS_FOCUS: Set by gtk_widget_grab_focus() for widgets that also
  70  *  have %GTK_CAN_FOCUS set. The flag will be unset once another widget
  71  *  grabs the focus.
  72  * @GTK_CAN_DEFAULT: The widget is allowed to receive the default action via
  73  *  gtk_widget_grab_default() and will reserve space to draw the default if possible
  74  * @GTK_HAS_DEFAULT: The widget currently is receiving the default action and
  75  *  should be drawn appropriately if possible
  76  * @GTK_HAS_GRAB: Set by gtk_grab_add(), unset by gtk_grab_remove(). It means that the
  77  *  widget is in the grab_widgets stack, and will be the preferred one for
  78  *  receiving events other than ones of cosmetic value.
  79  * @GTK_RC_STYLE: Indicates that the widget's style has been looked up through the rc
  80  *  mechanism. It does not imply that the widget actually had a style
  81  *  defined through the rc mechanism.
  82  * @GTK_COMPOSITE_CHILD: Indicates that the widget is a composite child of its parent; see
  83  *  gtk_widget_push_composite_child(), gtk_widget_pop_composite_child().
  84  * @GTK_APP_PAINTABLE: Set and unset by gtk_widget_set_app_paintable().
  85  *  Must be set on widgets whose window the application directly draws on,
  86  *  in order to keep GTK+ from overwriting the drawn stuff.  See
  87  *  <xref linkend="app-paintable-widgets"/> for a detailed
  88  *  description of this flag.
  89  * @GTK_RECEIVES_DEFAULT: The widget when focused will receive the default action and have
  90  *  %GTK_HAS_DEFAULT set even if there is a different widget set as default.
  91  * @GTK_DOUBLE_BUFFERED: Set and unset by gtk_widget_set_double_buffered().
  92  *  Indicates that exposes done on the widget should be
  93  *  double-buffered.  See <xref linkend="double-buffering"/> for a
  94  *  detailed discussion of how double-buffering works in GTK+ and
  95  *  why you may want to disable it for special cases.
  96  * @GTK_NO_SHOW_ALL:
  97  *
  98  * Tells about certain properties of the widget.
  99  */
 100 typedef enum
 101 {
 102   GTK_TOPLEVEL         = 1 << 4,
 103   GTK_NO_WINDOW        = 1 << 5,
 104   GTK_REALIZED         = 1 << 6,
 105   GTK_MAPPED           = 1 << 7,
 106   GTK_VISIBLE          = 1 << 8,
 107   GTK_SENSITIVE        = 1 << 9,
 108   GTK_PARENT_SENSITIVE = 1 << 10,
 109   GTK_CAN_FOCUS        = 1 << 11,
 110   GTK_HAS_FOCUS        = 1 << 12,
 111   GTK_CAN_DEFAULT      = 1 << 13,
 112   GTK_HAS_DEFAULT      = 1 << 14,
 113   GTK_HAS_GRAB         = 1 << 15,
 114   GTK_RC_STYLE         = 1 << 16,
 115   GTK_COMPOSITE_CHILD  = 1 << 17,
 116   GTK_APP_PAINTABLE    = 1 << 18,
 117   GTK_RECEIVES_DEFAULT = 1 << 19,
 118   GTK_DOUBLE_BUFFERED  = 1 << 20,
 119   GTK_NO_SHOW_ALL      = 1 << 21,
 120   GTK_MULTIDEVICE      = 1 << 22
 121 } GtkWidgetFlags;
 122
 123 /* Kinds of widget-specific help */
 124 typedef enum
 125 {
 126   GTK_WIDGET_HELP_TOOLTIP,
 127   GTK_WIDGET_HELP_WHATS_THIS
 128 } GtkWidgetHelpType;
 129
 130 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
 131  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
 132  */
 133 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
 134 #define GTK_WIDGET(widget)                (G_TYPE_CHECK_INSTANCE_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
 135 #define GTK_WIDGET_CLASS(klass)           (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
 136 #define GTK_IS_WIDGET(widget)             (G_TYPE_CHECK_INSTANCE_TYPE ((widget), GTK_TYPE_WIDGET))
 137 #define GTK_IS_WIDGET_CLASS(klass)        (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
 138 #define GTK_WIDGET_GET_CLASS(obj)         (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
 139
 140 /* Macros for extracting the widget flags from GtkWidget.
 141  */
 142 /**
 143  * GTK_WIDGET_FLAGS:
 144  * @wid: a #GtkWidget.
 145  *
 146  * Returns the widget flags from @wid.
 147  *
 148  * Deprecated: 2.20: Use the proper function to test individual states:
 149  * gtk_widget_get_app_paintable(), gtk_widget_get_can_default(),
 150  * gtk_widget_get_can_focus(), gtk_widget_get_double_buffered(),
 151  * gtk_widget_has_default(), gtk_widget_is_drawable(),
 152  * gtk_widget_has_focus(), gtk_widget_has_grab(), gtk_widget_get_mapped(),
 153  * gtk_widget_get_has_window(), gtk_widget_has_rc_style(),
 154  * gtk_widget_get_realized(), gtk_widget_get_receives_default(),
 155  * gtk_widget_get_sensitive(), gtk_widget_is_sensitive(),
 156  * gtk_widget_is_toplevel() or gtk_widget_get_visible().
 157  */
 158 #define GTK_WIDGET_FLAGS(wid)             (GTK_OBJECT_FLAGS (wid))
 159 /* FIXME: Deprecating GTK_WIDGET_FLAGS requires fixing GTK internals. */
 160
 161 /* Macros for setting and clearing widget flags.
 162  */
 163 /**
 164  * GTK_WIDGET_SET_FLAGS:
 165  * @wid: a #GtkWidget.
 166  * @flag: the flags to set.
 167  *
 168  * Turns on certain widget flags.
 169  *
 170  * Deprecated: 2.22: Use the proper function instead: gtk_widget_set_app_paintable(),
 171  *   gtk_widget_set_can_default(), gtk_widget_set_can_focus(),
 172  *   gtk_widget_set_double_buffered(), gtk_widget_set_has_window(),
 173  *   gtk_widget_set_mapped(), gtk_widget_set_no_show_all(),
 174  *   gtk_widget_set_realized(), gtk_widget_set_receives_default(),
 175  *   gtk_widget_set_sensitive() or gtk_widget_set_visible().
 176  *
 177  */
 178 #define GTK_WIDGET_SET_FLAGS(wid,flag)    G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
 179 /* FIXME: Deprecating GTK_WIDGET_SET_FLAGS requires fixing GTK internals. */
 180
 181 /**
 182  * GTK_WIDGET_UNSET_FLAGS:
 183  * @wid: a #GtkWidget.
 184  * @flag: the flags to unset.
 185  *
 186  * Turns off certain widget flags.
 187  *
 188  * Deprecated: 2.22: Use the proper function instead. See GTK_WIDGET_SET_FLAGS().
 189  */
 190 #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
 191 /* FIXME: Deprecating GTK_WIDGET_UNSET_FLAGS requires fixing GTK internals. */
 192
 193 #define GTK_TYPE_REQUISITION              (gtk_requisition_get_type ())
 194
 195 /* forward declaration to avoid excessive includes (and concurrent includes)
 196  */
 197 typedef struct _GtkRequisition     GtkRequisition;
 198 typedef struct _GtkSelectionData   GtkSelectionData;
 199 typedef struct _GtkWidgetPrivate   GtkWidgetPrivate;
 200 typedef struct _GtkWidgetClass     GtkWidgetClass;
 201 typedef struct _GtkWidgetAuxInfo   GtkWidgetAuxInfo;
 202 typedef struct _GtkClipboard       GtkClipboard;
 203 typedef struct _GtkTooltip         GtkTooltip;
 204 typedef struct _GtkWindow          GtkWindow;
 205
 206
 207 /**
 208  * GtkAllocation:
 209  * @x: the X position of the widget's area relative to its parents allocation.
 210  * @y: the Y position of the widget's area relative to its parents allocation.
 211  * @width: the width of the widget's allocated area.
 212  * @height: the height of the widget's allocated area.
 213  *
 214  * A <structname>GtkAllocation</structname> of a widget represents region which has been allocated to the
 215  * widget by its parent. It is a subregion of its parents allocation. See
 216  * <xref linkend="size-allocation"/> for more information.
 217  */
 218 typedef         GdkRectangle       GtkAllocation;
 219
 220 /**
 221  * GtkCallback:
 222  * @widget: the widget to operate on
 223  * @data: user-supplied data
 224  *
 225  * The type of the callback functions used for e.g. iterating over
 226  * the children of a container, see gtk_container_foreach().
 227  */
 228 typedef void    (*GtkCallback)     (GtkWidget        *widget,
 229                                     gpointer          data);
 230
 231 /**
 232  * GtkRequisition:
 233  * @width: the widget's desired width
 234  * @height: the widget's desired height
 235  *
 236  * A <structname>GtkRequisition</structname> represents the desired size of a widget. See
 237  * <xref linkend="size-requisition"/> for more information.
 238  */
 239 struct _GtkRequisition
 240 {
 241   gint width;
 242   gint height;
 243 };
 244
 245 /* The widget is the base of the tree for displayable objects.
 246  *  (A displayable object is one which takes up some amount
 247  *  of screen real estate). It provides a common base and interface
 248  *  which actual widgets must adhere to.
 249  */
 250 struct _GtkWidget
 251 {
 252   /* The object structure needs to be the first
 253    *  element in the widget structure in order for
 254    *  the object mechanism to work correctly. This
 255    *  allows a GtkWidget pointer to be cast to a
 256    *  GtkObject pointer.
 257    */
 258   GtkObject object;
 259
 260   /* internally used private flags. */
 261   guint GSEAL (private_flags) : 16;
 262
 263   GtkWidgetPrivate *priv;
 264 };
 265
 266 /**
 267  * GtkWidgetClass:
 268  * @parent_class: The object class structure needs to be the first
 269  *   element in the widget class structure in order for the class mechanism
 270  *   to work correctly. This allows a GtkWidgetClass pointer to be cast to
 271  *   a GtkObjectClass pointer.
 272  * @activate_signal: The signal to emit when a widget of this class is
 273  *   activated, gtk_widget_activate() handles the emission.
 274  *   Implementation of this signal is optional.
 275  * @set_scroll_adjustments_signal: This signal is emitted  when a widget of
 276  *   this class is added to a scrolling aware parent,
 277  *   gtk_widget_set_scroll_adjustments() handles the emission.
 278  *   Implementation of this signal is optional.
 279  * @adjust_size_request: Convert an initial size request from a widget's
 280  *   #GtkSizeRequest virtual method implementations into a size request to
 281  *   be used by parent containers in laying out the widget.
 282  *   adjust_size_request adjusts <emphasis>from</emphasis> a child widget's
 283  *   original request <emphasis>to</emphasis> what a parent container should
 284  *   use for layout. The @for_size argument will be -1 if the request should
 285  *   not be for a particular size in the opposing orientation, i.e. if the
 286  *   request is not height-for-width or width-for-height. If @for_size is
 287  *   greater than -1, it is the proposed allocation in the opposing
 288  *   orientation that we need the request for. Implementations of
 289  *   adjust_size_request should chain up to the default implementation,
 290  *   which applies #GtkWidget's margin properties and imposes any values
 291  *   from gtk_widget_set_size_request(). Chaining up should be last,
 292  *   <emphasis>after</emphasis> your subclass adjusts the request, so
 293  *   #GtkWidget can apply constraints and add the margin properly.
 294  * @adjust_size_allocation: Convert an initial size allocation assigned
 295  *   by a #GtkContainer using gtk_widget_size_allocate(), into an actual
 296  *   size allocation to be used by the widget. adjust_size_allocation
 297  *   adjusts <emphasis>to</emphasis> a child widget's actual allocation
 298  *   <emphasis>from</emphasis> what a parent container computed for the
 299  *   child. The adjusted allocation must be entirely within the original
 300  *   allocation. In any custom implementation, chain up to the default
 301  *   #GtkWidget implementation of this method, which applies the margin
 302  *   and alignment properties of #GtkWidget. Chain up
 303  *   <emphasis>before</emphasis> performing your own adjustments so your
 304  *   own adjustments remove more allocation after the #GtkWidget base
 305  *   class has already removed margin and alignment.
 306  */
 307 struct _GtkWidgetClass
 308 {
 309   GtkObjectClass parent_class;
 310
 311   /*< public >*/
 312
 313   guint activate_signal;
 314
 315   guint set_scroll_adjustments_signal;
 316
 317   /*< private >*/
 318
 319   /* seldomly overidden */
 320   void (*dispatch_child_properties_changed) (GtkWidget   *widget,
 321                                              guint        n_pspecs,
 322                                              GParamSpec **pspecs);
 323
 324   /* basics */
 325   void (* show)                (GtkWidget        *widget);
 326   void (* show_all)            (GtkWidget        *widget);
 327   void (* hide)                (GtkWidget        *widget);
 328   void (* hide_all)            (GtkWidget        *widget);
 329   void (* map)                 (GtkWidget        *widget);
 330   void (* unmap)               (GtkWidget        *widget);
 331   void (* realize)             (GtkWidget        *widget);
 332   void (* unrealize)           (GtkWidget        *widget);
 333   void (* size_request)        (GtkWidget        *widget,
 334                                 GtkRequisition   *requisition);
 335   void (* size_allocate)       (GtkWidget        *widget,
 336                                 GtkAllocation    *allocation);
 337   void (* state_changed)       (GtkWidget        *widget,
 338                                 GtkStateType      previous_state);
 339   void (* parent_set)          (GtkWidget        *widget,
 340                                 GtkWidget        *previous_parent);
 341   void (* hierarchy_changed)   (GtkWidget        *widget,
 342                                 GtkWidget        *previous_toplevel);
 343   void (* style_set)           (GtkWidget        *widget,
 344                                 GtkStyle         *previous_style);
 345   void (* direction_changed)   (GtkWidget        *widget,
 346                                 GtkTextDirection  previous_direction);
 347   void (* grab_notify)         (GtkWidget        *widget,
 348                                 gboolean          was_grabbed);
 349   void (* child_notify)        (GtkWidget        *widget,
 350                                 GParamSpec       *pspec);
 351
 352   /* Mnemonics */
 353   gboolean (* mnemonic_activate) (GtkWidget    *widget,
 354                                   gboolean      group_cycling);
 355
 356   /* explicit focus */
 357   void     (* grab_focus)      (GtkWidget        *widget);
 358   gboolean (* focus)           (GtkWidget        *widget,
 359                                 GtkDirectionType  direction);
 360
 361   /* events */
 362   gboolean (* event)                    (GtkWidget           *widget,
 363                                          GdkEvent            *event);
 364   gboolean (* button_press_event)       (GtkWidget           *widget,
 365                                          GdkEventButton      *event);
 366   gboolean (* button_release_event)     (GtkWidget           *widget,
 367                                          GdkEventButton      *event);
 368   gboolean (* scroll_event)             (GtkWidget           *widget,
 369                                          GdkEventScroll      *event);
 370   gboolean (* motion_notify_event)      (GtkWidget           *widget,
 371                                          GdkEventMotion      *event);
 372   gboolean (* delete_event)             (GtkWidget           *widget,
 373                                          GdkEventAny         *event);
 374   gboolean (* destroy_event)            (GtkWidget           *widget,
 375                                          GdkEventAny         *event);
 376   gboolean (* expose_event)             (GtkWidget           *widget,
 377                                          GdkEventExpose      *event);
 378   gboolean (* key_press_event)          (GtkWidget           *widget,
 379                                          GdkEventKey         *event);
 380   gboolean (* key_release_event)        (GtkWidget           *widget,
 381                                          GdkEventKey         *event);
 382   gboolean (* enter_notify_event)       (GtkWidget           *widget,
 383                                          GdkEventCrossing    *event);
 384   gboolean (* leave_notify_event)       (GtkWidget           *widget,
 385                                          GdkEventCrossing    *event);
 386   gboolean (* configure_event)          (GtkWidget           *widget,
 387                                          GdkEventConfigure   *event);
 388   gboolean (* focus_in_event)           (GtkWidget           *widget,
 389                                          GdkEventFocus       *event);
 390   gboolean (* focus_out_event)          (GtkWidget           *widget,
 391                                          GdkEventFocus       *event);
 392   gboolean (* map_event)                (GtkWidget           *widget,
 393                                          GdkEventAny         *event);
 394   gboolean (* unmap_event)              (GtkWidget           *widget,
 395                                          GdkEventAny         *event);
 396   gboolean (* property_notify_event)    (GtkWidget           *widget,
 397                                          GdkEventProperty    *event);
 398   gboolean (* selection_clear_event)    (GtkWidget           *widget,
 399                                          GdkEventSelection   *event);
 400   gboolean (* selection_request_event)  (GtkWidget           *widget,
 401                                          GdkEventSelection   *event);
 402   gboolean (* selection_notify_event)   (GtkWidget           *widget,
 403                                          GdkEventSelection   *event);
 404   gboolean (* proximity_in_event)       (GtkWidget           *widget,
 405                                          GdkEventProximity   *event);
 406   gboolean (* proximity_out_event)      (GtkWidget           *widget,
 407                                          GdkEventProximity   *event);
 408   gboolean (* visibility_notify_event)  (GtkWidget           *widget,
 409                                          GdkEventVisibility  *event);
 410   gboolean (* client_event)             (GtkWidget           *widget,
 411                                          GdkEventClient      *event);
 412   gboolean (* no_expose_event)          (GtkWidget           *widget,
 413                                          GdkEventAny         *event);
 414   gboolean (* window_state_event)       (GtkWidget           *widget,
 415                                          GdkEventWindowState *event);
 416
 417   /* selection */
 418   void (* selection_get)           (GtkWidget          *widget,
 419                                     GtkSelectionData   *selection_data,
 420                                     guint               info,
 421                                     guint               time_);
 422   void (* selection_received)      (GtkWidget          *widget,
 423                                     GtkSelectionData   *selection_data,
 424                                     guint               time_);
 425
 426   /* Source side drag signals */
 427   void (* drag_begin)              (GtkWidget          *widget,
 428                                     GdkDragContext     *context);
 429   void (* drag_end)                (GtkWidget          *widget,
 430                                     GdkDragContext     *context);
 431   void (* drag_data_get)           (GtkWidget          *widget,
 432                                     GdkDragContext     *context,
 433                                     GtkSelectionData   *selection_data,
 434                                     guint               info,
 435                                     guint               time_);
 436   void (* drag_data_delete)        (GtkWidget          *widget,
 437                                     GdkDragContext     *context);
 438
 439   /* Target side drag signals */
 440   void (* drag_leave)              (GtkWidget          *widget,
 441                                     GdkDragContext     *context,
 442                                     guint               time_);
 443   gboolean (* drag_motion)         (GtkWidget          *widget,
 444                                     GdkDragContext     *context,
 445                                     gint                x,
 446                                     gint                y,
 447                                     guint               time_);
 448   gboolean (* drag_drop)           (GtkWidget          *widget,
 449                                     GdkDragContext     *context,
 450                                     gint                x,
 451                                     gint                y,
 452                                     guint               time_);
 453   void (* drag_data_received)      (GtkWidget          *widget,
 454                                     GdkDragContext     *context,
 455                                     gint                x,
 456                                     gint                y,
 457                                     GtkSelectionData   *selection_data,
 458                                     guint               info,
 459                                     guint               time_);
 460
 461   /* Signals used only for keybindings */
 462   gboolean (* popup_menu)          (GtkWidget          *widget);
 463
 464   /* If a widget has multiple tooltips/whatsthis, it should show the
 465    * one for the current focus location, or if that doesn't make
 466    * sense, should cycle through them showing each tip alongside
 467    * whatever piece of the widget it applies to.
 468    */
 469   gboolean (* show_help)           (GtkWidget          *widget,
 470                                     GtkWidgetHelpType   help_type);
 471
 472   /* accessibility support
 473    */
 474   AtkObject*   (*get_accessible)     (GtkWidget *widget);
 475
 476   void         (*screen_changed)     (GtkWidget *widget,
 477                                       GdkScreen *previous_screen);
 478   gboolean     (*can_activate_accel) (GtkWidget *widget,
 479                                       guint      signal_id);
 480
 481   /* Sent when a grab is broken. */
 482   gboolean (*grab_broken_event) (GtkWidget           *widget,
 483                                  GdkEventGrabBroken  *event);
 484
 485   void         (* composited_changed) (GtkWidget *widget);
 486
 487   gboolean     (* query_tooltip)      (GtkWidget  *widget,
 488                                        gint        x,
 489                                        gint        y,
 490                                        gboolean    keyboard_tooltip,
 491                                        GtkTooltip *tooltip);
 492
 493   /*< public >*/
 494
 495   void         (* adjust_size_request)    (GtkWidget         *widget,
 496                                            GtkOrientation     orientation,
 497                                            gint               for_size,
 498                                            gint              *minimum_size,
 499                                            gint              *natural_size);
 500   void         (* adjust_size_allocation) (GtkWidget         *widget,
 501                                            GtkAllocation     *allocation);
 502
 503   /*< private >*/
 504
 505   /* Signals without a C default handler class slot:
 506    * gboolean   (*damage_event) (GtkWidget      *widget,
 507    *                             GdkEventExpose *event);
 508    */
 509
 510   /* Padding for future expansion */
 511   void (*_gtk_reserved1) (void);
 512   void (*_gtk_reserved2) (void);
 513   void (*_gtk_reserved3) (void);
 514   void (*_gtk_reserved4) (void);
 515   void (*_gtk_reserved5) (void);
 516   void (*_gtk_reserved6) (void);
 517   void (*_gtk_reserved7) (void);
 518   void (*_gtk_reserved8) (void);
 519 };
 520
 521 struct _GtkWidgetAuxInfo
 522 {
 523   gint width;
 524   gint height;
 525
 526   guint   halign : 4;
 527   guint   valign : 4;
 528
 529   GtkBorder margin;
 530 };
 531
 532 GType      gtk_widget_get_type            (void) G_GNUC_CONST;
 533 GtkWidget* gtk_widget_new                 (GType                type,
 534                                            const gchar         *first_property_name,
 535                                            ...);
 536 void       gtk_widget_destroy             (GtkWidget           *widget);
 537 void       gtk_widget_destroyed           (GtkWidget           *widget,
 538                                            GtkWidget          **widget_pointer);
 539 void       gtk_widget_unparent            (GtkWidget           *widget);
 540 void       gtk_widget_show                (GtkWidget           *widget);
 541 void       gtk_widget_show_now            (GtkWidget           *widget);
 542 void       gtk_widget_hide                (GtkWidget           *widget);
 543 void       gtk_widget_show_all            (GtkWidget           *widget);
 544 void       gtk_widget_hide_all            (GtkWidget           *widget);
 545 void       gtk_widget_set_no_show_all     (GtkWidget           *widget,
 546                                            gboolean             no_show_all);
 547 gboolean   gtk_widget_get_no_show_all     (GtkWidget           *widget);
 548 void       gtk_widget_map                 (GtkWidget           *widget);
 549 void       gtk_widget_unmap               (GtkWidget           *widget);
 550 void       gtk_widget_realize             (GtkWidget           *widget);
 551 void       gtk_widget_unrealize           (GtkWidget           *widget);
 552
 553 /* Queuing draws */
 554 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 555 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 556                                            gint                 x,
 557                                            gint                 y,
 558                                            gint                 width,
 559                                            gint                 height);
 560 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 561 void       gtk_widget_queue_resize_no_redraw (GtkWidget *widget);
 562 #ifndef GTK_DISABLE_DEPRECATED
 563 void       gtk_widget_size_request        (GtkWidget           *widget,
 564                                            GtkRequisition      *requisition);
 565 #endif
 566 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 567                                            GtkAllocation       *allocation);
 568 #ifndef GTK_DISABLE_DEPRECATED
 569 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 570                                              GtkRequisition    *requisition);
 571 #endif
 572 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 573                                            const gchar         *accel_signal,
 574                                            GtkAccelGroup       *accel_group,
 575                                            guint                accel_key,
 576                                            GdkModifierType      accel_mods,
 577                                            GtkAccelFlags        accel_flags);
 578 gboolean   gtk_widget_remove_accelerator  (GtkWidget           *widget,
 579                                            GtkAccelGroup       *accel_group,
 580                                            guint                accel_key,
 581                                            GdkModifierType      accel_mods);
 582 void       gtk_widget_set_accel_path      (GtkWidget           *widget,
 583                                            const gchar         *accel_path,
 584                                            GtkAccelGroup       *accel_group);
 585 const gchar* _gtk_widget_get_accel_path   (GtkWidget           *widget,
 586                                            gboolean            *locked);
 587 GList*     gtk_widget_list_accel_closures (GtkWidget           *widget);
 588 gboolean   gtk_widget_can_activate_accel  (GtkWidget           *widget,
 589                                            guint                signal_id);
 590 gboolean   gtk_widget_mnemonic_activate   (GtkWidget           *widget,
 591                                            gboolean             group_cycling);
 592 gboolean   gtk_widget_event               (GtkWidget           *widget,
 593                                            GdkEvent            *event);
 594 gint       gtk_widget_send_expose         (GtkWidget           *widget,
 595                                            GdkEvent            *event);
 596 gboolean   gtk_widget_send_focus_change   (GtkWidget           *widget,
 597                                            GdkEvent            *event);
 598
 599 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 600 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 601                                               GtkAdjustment    *hadjustment,
 602                                               GtkAdjustment    *vadjustment);
 603
 604 void       gtk_widget_reparent            (GtkWidget           *widget,
 605                                            GtkWidget           *new_parent);
 606 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 607                                            const GdkRectangle  *area,
 608                                            GdkRectangle        *intersection);
 609 cairo_region_t *gtk_widget_region_intersect       (GtkWidget           *widget,
 610                                            const cairo_region_t     *region);
 611
 612 void    gtk_widget_freeze_child_notify    (GtkWidget           *widget);
 613 void    gtk_widget_child_notify           (GtkWidget           *widget,
 614                                            const gchar         *child_property);
 615 void    gtk_widget_thaw_child_notify      (GtkWidget           *widget);
 616
 617 void       gtk_widget_set_can_focus       (GtkWidget           *widget,
 618                                            gboolean             can_focus);
 619 gboolean   gtk_widget_get_can_focus       (GtkWidget           *widget);
 620 gboolean   gtk_widget_has_focus           (GtkWidget           *widget);
 621 gboolean   gtk_widget_is_focus            (GtkWidget           *widget);
 622 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 623
 624 void       gtk_widget_set_can_default     (GtkWidget           *widget,
 625                                            gboolean             can_default);
 626 gboolean   gtk_widget_get_can_default     (GtkWidget           *widget);
 627 gboolean   gtk_widget_has_default         (GtkWidget           *widget);
 628 void       gtk_widget_grab_default        (GtkWidget           *widget);
 629
 630 void      gtk_widget_set_receives_default (GtkWidget           *widget,
 631                                            gboolean             receives_default);
 632 gboolean  gtk_widget_get_receives_default (GtkWidget           *widget);
 633
 634 gboolean   gtk_widget_has_grab            (GtkWidget           *widget);
 635
 636 gboolean   gtk_widget_device_is_shadowed  (GtkWidget           *widget,
 637                                            GdkDevice           *device);
 638
 639
 640 void                  gtk_widget_set_name               (GtkWidget    *widget,
 641                                                          const gchar  *name);
 642 G_CONST_RETURN gchar* gtk_widget_get_name               (GtkWidget    *widget);
 643
 644 void                  gtk_widget_set_state              (GtkWidget    *widget,
 645                                                          GtkStateType  state);
 646 GtkStateType          gtk_widget_get_state              (GtkWidget    *widget);
 647
 648 void                  gtk_widget_set_sensitive          (GtkWidget    *widget,
 649                                                          gboolean      sensitive);
 650 gboolean              gtk_widget_get_sensitive          (GtkWidget    *widget);
 651 gboolean              gtk_widget_is_sensitive           (GtkWidget    *widget);
 652
 653 void                  gtk_widget_set_visible            (GtkWidget    *widget,
 654                                                          gboolean      visible);
 655 gboolean              gtk_widget_get_visible            (GtkWidget    *widget);
 656
 657 void                  gtk_widget_set_has_window         (GtkWidget    *widget,
 658                                                          gboolean      has_window);
 659 gboolean              gtk_widget_get_has_window         (GtkWidget    *widget);
 660
 661 gboolean              gtk_widget_is_toplevel            (GtkWidget    *widget);
 662 gboolean              gtk_widget_is_drawable            (GtkWidget    *widget);
 663 void                  gtk_widget_set_realized           (GtkWidget    *widget,
 664                                                          gboolean      realized);
 665 gboolean              gtk_widget_get_realized           (GtkWidget    *widget);
 666 void                  gtk_widget_set_mapped             (GtkWidget    *widget,
 667                                                          gboolean      mapped);
 668 gboolean              gtk_widget_get_mapped             (GtkWidget    *widget);
 669
 670 void                  gtk_widget_set_app_paintable      (GtkWidget    *widget,
 671                                                          gboolean      app_paintable);
 672 gboolean              gtk_widget_get_app_paintable      (GtkWidget    *widget);
 673
 674 void                  gtk_widget_set_double_buffered    (GtkWidget    *widget,
 675                                                          gboolean      double_buffered);
 676 gboolean              gtk_widget_get_double_buffered    (GtkWidget    *widget);
 677
 678 void                  gtk_widget_set_redraw_on_allocate (GtkWidget    *widget,
 679                                                          gboolean      redraw_on_allocate);
 680
 681 void                  gtk_widget_set_parent             (GtkWidget    *widget,
 682                                                          GtkWidget    *parent);
 683 GtkWidget           * gtk_widget_get_parent             (GtkWidget    *widget);
 684
 685 void                  gtk_widget_set_parent_window      (GtkWidget    *widget,
 686                                                          GdkWindow    *parent_window);
 687 GdkWindow           * gtk_widget_get_parent_window      (GtkWidget    *widget);
 688
 689 void                  gtk_widget_set_child_visible      (GtkWidget    *widget,
 690                                                          gboolean      is_visible);
 691 gboolean              gtk_widget_get_child_visible      (GtkWidget    *widget);
 692
 693 void                  gtk_widget_set_window             (GtkWidget    *widget,
 694                                                          GdkWindow    *window);
 695 GdkWindow           * gtk_widget_get_window             (GtkWidget    *widget);
 696
 697 void                  gtk_widget_get_allocation         (GtkWidget     *widget,
 698                                                          GtkAllocation *allocation);
 699 void                  gtk_widget_set_allocation         (GtkWidget     *widget,
 700                                                          const GtkAllocation *allocation);
 701
 702 void                  gtk_widget_get_requisition        (GtkWidget     *widget,
 703                                                          GtkRequisition *requisition);
 704
 705 gboolean   gtk_widget_child_focus         (GtkWidget           *widget,
 706                                            GtkDirectionType     direction);
 707 gboolean   gtk_widget_keynav_failed       (GtkWidget           *widget,
 708                                            GtkDirectionType     direction);
 709 void       gtk_widget_error_bell          (GtkWidget           *widget);
 710
 711 void       gtk_widget_set_size_request    (GtkWidget           *widget,
 712                                            gint                 width,
 713                                            gint                 height);
 714 void       gtk_widget_get_size_request    (GtkWidget           *widget,
 715                                            gint                *width,
 716                                            gint                *height);
 717 void       gtk_widget_set_events          (GtkWidget           *widget,
 718                                            gint                 events);
 719 void       gtk_widget_add_events          (GtkWidget           *widget,
 720                                            gint                 events);
 721 void       gtk_widget_set_device_events   (GtkWidget           *widget,
 722                                            GdkDevice           *device,
 723                                            GdkEventMask         events);
 724 void       gtk_widget_add_device_events   (GtkWidget           *widget,
 725                                            GdkDevice           *device,
 726                                            GdkEventMask         events);
 727 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 728                                             GdkExtensionMode    mode);
 729
 730 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 731 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 732 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 733                                          GType           widget_type);
 734 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 735
 736 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
 737 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
 738 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);
 739 GdkWindow *   gtk_widget_get_root_window (GtkWidget *widget);
 740 GtkSettings*  gtk_widget_get_settings    (GtkWidget *widget);
 741 GtkClipboard *gtk_widget_get_clipboard   (GtkWidget *widget,
 742                                           GdkAtom    selection);
 743
 744 /* Multidevice support */
 745 gboolean         gtk_widget_get_support_multidevice (GtkWidget      *widget);
 746 void             gtk_widget_set_support_multidevice (GtkWidget      *widget,
 747                                                      gboolean        support_multidevice);
 748
 749 /* Accessibility support */
 750 AtkObject*       gtk_widget_get_accessible               (GtkWidget          *widget);
 751
 752
 753 /* Margin and alignment */
 754 GtkAlign gtk_widget_get_halign        (GtkWidget *widget);
 755 void     gtk_widget_set_halign        (GtkWidget *widget,
 756                                        GtkAlign   align);
 757 GtkAlign gtk_widget_get_valign        (GtkWidget *widget);
 758 void     gtk_widget_set_valign        (GtkWidget *widget,
 759                                        GtkAlign   align);
 760 gint     gtk_widget_get_margin_left   (GtkWidget *widget);
 761 void     gtk_widget_set_margin_left   (GtkWidget *widget,
 762                                        gint       margin);
 763 gint     gtk_widget_get_margin_right  (GtkWidget *widget);
 764 void     gtk_widget_set_margin_right  (GtkWidget *widget,
 765                                        gint       margin);
 766 gint     gtk_widget_get_margin_top    (GtkWidget *widget);
 767 void     gtk_widget_set_margin_top    (GtkWidget *widget,
 768                                        gint       margin);
 769 gint     gtk_widget_get_margin_bottom (GtkWidget *widget);
 770 void     gtk_widget_set_margin_bottom (GtkWidget *widget,
 771                                        gint       margin);
 772
 773
 774 gint         gtk_widget_get_events      (GtkWidget      *widget);
 775 GdkEventMask gtk_widget_get_device_events (GtkWidget    *widget,
 776                                            GdkDevice    *device);
 777 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 778                                          gint           *x,
 779                                          gint           *y);
 780
 781 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 782                                          GtkWidget      *ancestor);
 783
 784 gboolean     gtk_widget_translate_coordinates (GtkWidget  *src_widget,
 785                                                GtkWidget  *dest_widget,
 786                                                gint        src_x,
 787                                                gint        src_y,
 788                                                gint       *dest_x,
 789                                                gint       *dest_y);
 790
 791 /* Hide widget and return TRUE.
 792  */
 793 gboolean     gtk_widget_hide_on_delete  (GtkWidget      *widget);
 794
 795 /* Widget styles.
 796  */
 797 void        gtk_widget_style_attach       (GtkWidget            *widget);
 798
 799 gboolean    gtk_widget_has_rc_style       (GtkWidget            *widget);
 800 void        gtk_widget_set_style          (GtkWidget            *widget,
 801                                            GtkStyle             *style);
 802 void        gtk_widget_ensure_style       (GtkWidget            *widget);
 803 GtkStyle *  gtk_widget_get_style          (GtkWidget            *widget);
 804
 805 void        gtk_widget_modify_style       (GtkWidget            *widget,
 806                                            GtkRcStyle           *style);
 807 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 808 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 809                                            GtkStateType          state,
 810                                            const GdkColor       *color);
 811 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 812                                            GtkStateType          state,
 813                                            const GdkColor       *color);
 814 void        gtk_widget_modify_text        (GtkWidget            *widget,
 815                                            GtkStateType          state,
 816                                            const GdkColor       *color);
 817 void        gtk_widget_modify_base        (GtkWidget            *widget,
 818                                            GtkStateType          state,
 819                                            const GdkColor       *color);
 820 void        gtk_widget_modify_cursor      (GtkWidget            *widget,
 821                                            const GdkColor       *primary,
 822                                            const GdkColor       *secondary);
 823 void        gtk_widget_modify_font        (GtkWidget            *widget,
 824                                            PangoFontDescription *font_desc);
 825 void        gtk_widget_modify_symbolic_color (GtkWidget         *widget,
 826                                            const gchar          *name,
 827                                            const GdkColor       *color);
 828
 829 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 830 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 831 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 832                                                const gchar *text);
 833
 834 GdkPixbuf    *gtk_widget_render_icon          (GtkWidget   *widget,
 835                                                const gchar *stock_id,
 836                                                GtkIconSize  size,
 837                                                const gchar *detail);
 838
 839 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 840  * the returned name is newly allocated.
 841  */
 842 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 843                                          const gchar    *name);
 844 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 845
 846 /* Descend recursively and set rc-style on all widgets without user styles */
 847 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 848
 849 /* Push/pop pairs, to change default values upon a widget's creation.
 850  * This will override the values that got set by the
 851  * gtk_widget_set_default_* () functions.
 852  */
 853 void         gtk_widget_push_composite_child (void);
 854 void         gtk_widget_pop_composite_child  (void);
 855
 856 /* widget style properties
 857  */
 858 void gtk_widget_class_install_style_property        (GtkWidgetClass     *klass,
 859                                                      GParamSpec         *pspec);
 860 void gtk_widget_class_install_style_property_parser (GtkWidgetClass     *klass,
 861                                                      GParamSpec         *pspec,
 862                                                      GtkRcPropertyParser parser);
 863 GParamSpec*  gtk_widget_class_find_style_property   (GtkWidgetClass     *klass,
 864                                                      const gchar        *property_name);
 865 GParamSpec** gtk_widget_class_list_style_properties (GtkWidgetClass     *klass,
 866                                                      guint              *n_properties);
 867 void gtk_widget_style_get_property (GtkWidget        *widget,
 868                                     const gchar    *property_name,
 869                                     GValue           *value);
 870 void gtk_widget_style_get_valist   (GtkWidget        *widget,
 871                                     const gchar    *first_property_name,
 872                                     va_list         var_args);
 873 void gtk_widget_style_get          (GtkWidget        *widget,
 874                                     const gchar    *first_property_name,
 875                                     ...) G_GNUC_NULL_TERMINATED;
 876
 877
 878 /* Set certain default values to be used at widget creation time.
 879  */
 880 GtkStyle*    gtk_widget_get_default_style    (void);
 881
 882 /* Functions for setting directionality for widgets
 883  */
 884
 885 void             gtk_widget_set_direction         (GtkWidget        *widget,
 886                                                    GtkTextDirection  dir);
 887 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 888
 889 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 890 GtkTextDirection gtk_widget_get_default_direction (void);
 891
 892 /* Compositing manager functionality */
 893 gboolean gtk_widget_is_composited (GtkWidget *widget);
 894
 895 /* Counterpart to gdk_window_shape_combine_region.
 896  */
 897 void         gtk_widget_shape_combine_region (GtkWidget *widget,
 898                                               cairo_region_t *region);
 899 void         gtk_widget_input_shape_combine_region (GtkWidget *widget,
 900                                                     cairo_region_t *region);
 901
 902 /* internal function */
 903 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 904
 905 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 906  * return newly alocated strings.
 907  */
 908 void         gtk_widget_path               (GtkWidget *widget,
 909                                             guint     *path_length,
 910                                             gchar    **path,
 911                                             gchar    **path_reversed);
 912 void         gtk_widget_class_path         (GtkWidget *widget,
 913                                             guint     *path_length,
 914                                             gchar    **path,
 915                                             gchar    **path_reversed);
 916
 917 GList* gtk_widget_list_mnemonic_labels  (GtkWidget *widget);
 918 void   gtk_widget_add_mnemonic_label    (GtkWidget *widget,
 919                                          GtkWidget *label);
 920 void   gtk_widget_remove_mnemonic_label (GtkWidget *widget,
 921                                          GtkWidget *label);
 922
 923 void                  gtk_widget_set_tooltip_window    (GtkWidget   *widget,
 924                                                         GtkWindow   *custom_window);
 925 GtkWindow *gtk_widget_get_tooltip_window    (GtkWidget   *widget);
 926 void       gtk_widget_trigger_tooltip_query (GtkWidget   *widget);
 927 void       gtk_widget_set_tooltip_text      (GtkWidget   *widget,
 928                                              const gchar *text);
 929 gchar *    gtk_widget_get_tooltip_text      (GtkWidget   *widget);
 930 void       gtk_widget_set_tooltip_markup    (GtkWidget   *widget,
 931                                              const gchar *markup);
 932 gchar *    gtk_widget_get_tooltip_markup    (GtkWidget   *widget);
 933 void       gtk_widget_set_has_tooltip       (GtkWidget   *widget,
 934                                              gboolean     has_tooltip);
 935 gboolean   gtk_widget_get_has_tooltip       (GtkWidget   *widget);
 936
 937 GType           gtk_requisition_get_type (void) G_GNUC_CONST;
 938 GtkRequisition *gtk_requisition_new      (void) G_GNUC_MALLOC;
 939 GtkRequisition *gtk_requisition_copy     (const GtkRequisition *requisition);
 940 void            gtk_requisition_free     (GtkRequisition       *requisition);
 941
 942 void              _gtk_widget_set_has_default             (GtkWidget    *widget,
 943                                                            gboolean      has_default);
 944 void              _gtk_widget_set_has_grab                (GtkWidget    *widget,
 945                                                            gboolean      has_grab);
 946 void              _gtk_widget_set_is_toplevel             (GtkWidget    *widget,
 947                                                            gboolean      is_toplevel);
 948
 949 void              _gtk_widget_grab_notify                 (GtkWidget    *widget,
 950                                                            gboolean     was_grabbed);
 951
 952 GtkWidgetAuxInfo *_gtk_widget_get_aux_info                (GtkWidget    *widget,
 953                                                            gboolean      create);
 954 void              _gtk_widget_propagate_hierarchy_changed (GtkWidget    *widget,
 955                                                            GtkWidget    *previous_toplevel);
 956 void              _gtk_widget_propagate_screen_changed    (GtkWidget    *widget,
 957                                                            GdkScreen    *previous_screen);
 958 void              _gtk_widget_propagate_composited_changed (GtkWidget    *widget);
 959
 960 void       _gtk_widget_set_device_window   (GtkWidget      *widget,
 961                                             GdkDevice      *device,
 962                                             GdkWindow      *pointer_window);
 963 GdkWindow *_gtk_widget_get_device_window   (GtkWidget      *widget,
 964                                             GdkDevice      *device);
 965 GList *    _gtk_widget_list_devices        (GtkWidget      *widget);
 966
 967 void       _gtk_widget_synthesize_crossing (GtkWidget      *from,
 968                                             GtkWidget      *to,
 969                                             GdkDevice      *device,
 970                                             GdkCrossingMode mode);
 971
 972 gpointer     _gtk_widget_peek_request_cache (GtkWidget *widget);
 973
 974 void         _gtk_widget_buildable_finish_accelerator (GtkWidget *widget,
 975                                                        GtkWidget *toplevel,
 976                                                        gpointer   user_data);
 977
 978 G_END_DECLS
 979
 980 #endif /* __GTK_WIDGET_H__ */