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