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