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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  20  * file for a list of people on the GTK+ Team.  See the ChangeLog
  21  * files for a list of changes.  These files are distributed with
  22  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  23  */
  24
  25 #ifndef __GTK_WIDGET_H__
  26 #define __GTK_WIDGET_H__
  27
  28 #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  29 #error "Only <gtk/gtk.h> can be included directly."
  30 #endif
  31
  32 #include <gdk/gdk.h>
  33 #include <gtk/gtkaccelgroup.h>
  34 #include <gtk/gtkborder.h>
  35 #include <gtk/gtktypes.h>
  36 #include <atk/atk.h>
  37
  38 G_BEGIN_DECLS
  39
  40 /* Kinds of widget-specific help */
  41 typedef enum
  42 {
  43   GTK_WIDGET_HELP_TOOLTIP,
  44   GTK_WIDGET_HELP_WHATS_THIS
  45 } GtkWidgetHelpType;
  46
  47 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
  48  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
  49  */
  50 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
  51 #define GTK_WIDGET(widget)                (G_TYPE_CHECK_INSTANCE_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
  52 #define GTK_WIDGET_CLASS(klass)           (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
  53 #define GTK_IS_WIDGET(widget)             (G_TYPE_CHECK_INSTANCE_TYPE ((widget), GTK_TYPE_WIDGET))
  54 #define GTK_IS_WIDGET_CLASS(klass)        (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
  55 #define GTK_WIDGET_GET_CLASS(obj)         (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
  56
  57 #define GTK_TYPE_REQUISITION              (gtk_requisition_get_type ())
  58
  59 typedef struct _GtkWidgetPrivate       GtkWidgetPrivate;
  60 typedef struct _GtkWidgetClass         GtkWidgetClass;
  61 typedef struct _GtkWidgetClassPrivate  GtkWidgetClassPrivate;
  62 typedef struct _GtkWidgetAuxInfo       GtkWidgetAuxInfo;
  63
  64 /**
  65  * GtkAllocation:
  66  * @x: the X position of the widget's area relative to its parents allocation.
  67  * @y: the Y position of the widget's area relative to its parents allocation.
  68  * @width: the width of the widget's allocated area.
  69  * @height: the height of the widget's allocated area.
  70  *
  71  * A <structname>GtkAllocation</structname> of a widget represents region
  72  * which has been allocated to the widget by its parent. It is a subregion
  73  * of its parents allocation. See <xref linkend="geometry-management"/> for
  74  * more information.
  75  */
  76 typedef         GdkRectangle       GtkAllocation;
  77
  78 /**
  79  * GtkCallback:
  80  * @widget: the widget to operate on
  81  * @data: (closure): user-supplied data
  82  *
  83  * The type of the callback functions used for e.g. iterating over
  84  * the children of a container, see gtk_container_foreach().
  85  */
  86 typedef void    (*GtkCallback)     (GtkWidget        *widget,
  87                                     gpointer          data);
  88
  89 /**
  90  * GtkRequisition:
  91  * @width: the widget's desired width
  92  * @height: the widget's desired height
  93  *
  94  * A <structname>GtkRequisition</structname> represents the desired size of a widget. See
  95  * <xref linkend="geometry-management"/> for more information.
  96  */
  97 struct _GtkRequisition
  98 {
  99   gint width;
 100   gint height;
 101 };
 102
 103 /* The widget is the base of the tree for displayable objects.
 104  *  (A displayable object is one which takes up some amount
 105  *  of screen real estate). It provides a common base and interface
 106  *  which actual widgets must adhere to.
 107  */
 108 struct _GtkWidget
 109 {
 110   GInitiallyUnowned parent_instance;
 111
 112   GtkWidgetPrivate *priv;
 113 };
 114
 115 /**
 116  * GtkWidgetClass:
 117  * @parent_class: The object class structure needs to be the first
 118  *   element in the widget class structure in order for the class mechanism
 119  *   to work correctly. This allows a GtkWidgetClass pointer to be cast to
 120  *   a GObjectClass pointer.
 121  * @activate_signal: The signal to emit when a widget of this class is
 122  *   activated, gtk_widget_activate() handles the emission.
 123  *   Implementation of this signal is optional.
 124  * @get_request_mode: This allows a widget to tell its parent container whether
 125  *   it prefers to be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
 126  *   %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
 127  *   %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH means the widget prefers to have
 128  *   #GtkWidgetClass.get_preferred_width() called and then
 129  *   #GtkWidgetClass.get_preferred_height_for_width().
 130  *   %GTK_SIZE_REQUEST_CONSTANT_SIZE disables any height-for-width or
 131  *   width-for-height geometry management for a said widget and is the
 132  *   default return.
 133  *   It's important to note (as described below) that any widget
 134  *   which trades height-for-width or width-for-height must respond properly
 135  *   to both of the virtual methods #GtkWidgetClass.get_preferred_height_for_width()
 136  *   and #GtkWidgetClass.get_preferred_width_for_height() since it might be
 137  *   queried in either #GtkSizeRequestMode by its parent container.
 138  * @get_preferred_height: This is called by containers to obtain the minimum
 139  *   and natural height of a widget. A widget that does not actually trade
 140  *   any height for width or width for height only has to implement these
 141  *   two virtual methods (#GtkWidgetClass.get_preferred_width() and
 142  *   #GtkWidgetClass.get_preferred_height()).
 143  * @get_preferred_width_for_height: This is analogous to
 144  *   #GtkWidgetClass.get_preferred_height_for_width() except that it
 145  *   operates in the oposite orientation. It's rare that a widget actually
 146  *   does %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT requests but this can happen
 147  *   when, for example, a widget or container gets additional columns to
 148  *   compensate for a smaller allocated height.
 149  * @get_preferred_width: This is called by containers to obtain the minimum
 150  *   and natural width of a widget. A widget will never be allocated a width
 151  *   less than its minimum and will only ever be allocated a width greater
 152  *   than the natural width once all of the said widget's siblings have
 153  *   received their natural widths.
 154  *   Furthermore, a widget will only ever be allocated a width greater than
 155  *   its natural width if it was configured to receive extra expand space
 156  *   from its parent container.
 157  * @get_preferred_height_for_width: This is similar to
 158  *   #GtkWidgetClass.get_preferred_height() except that it is passed a
 159  *   contextual width to request height for. By implementing this virtual
 160  *   method it is possible for a #GtkLabel to tell its parent how much height
 161  *   would be required if the label were to be allocated a said width.
 162  * @adjust_size_request: Convert an initial size request from a widget's
 163  *   #GtkSizeRequestMode virtual method implementations into a size request to
 164  *   be used by parent containers in laying out the widget.
 165  *   adjust_size_request adjusts <emphasis>from</emphasis> a child widget's
 166  *   original request <emphasis>to</emphasis> what a parent container should
 167  *   use for layout. The @for_size argument will be -1 if the request should
 168  *   not be for a particular size in the opposing orientation, i.e. if the
 169  *   request is not height-for-width or width-for-height. If @for_size is
 170  *   greater than -1, it is the proposed allocation in the opposing
 171  *   orientation that we need the request for. Implementations of
 172  *   adjust_size_request should chain up to the default implementation,
 173  *   which applies #GtkWidget's margin properties and imposes any values
 174  *   from gtk_widget_set_size_request(). Chaining up should be last,
 175  *   <emphasis>after</emphasis> your subclass adjusts the request, so
 176  *   #GtkWidget can apply constraints and add the margin properly.
 177  * @adjust_size_allocation: Convert an initial size allocation assigned
 178  *   by a #GtkContainer using gtk_widget_size_allocate(), into an actual
 179  *   size allocation to be used by the widget. adjust_size_allocation
 180  *   adjusts <emphasis>to</emphasis> a child widget's actual allocation
 181  *   <emphasis>from</emphasis> what a parent container computed for the
 182  *   child. The adjusted allocation must be entirely within the original
 183  *   allocation. In any custom implementation, chain up to the default
 184  *   #GtkWidget implementation of this method, which applies the margin
 185  *   and alignment properties of #GtkWidget. Chain up
 186  *   <emphasis>before</emphasis> performing your own adjustments so your
 187  *   own adjustments remove more allocation after the #GtkWidget base
 188  *   class has already removed margin and alignment. The natural size
 189  *   passed in should be adjusted in the same way as the allocated size,
 190  *   which allows adjustments to perform alignments or other changes
 191  *   based on natural size.
 192  */
 193 struct _GtkWidgetClass
 194 {
 195   GInitiallyUnownedClass parent_class;
 196
 197   /*< public >*/
 198
 199   guint activate_signal;
 200
 201   /* seldomly overidden */
 202   void (*dispatch_child_properties_changed) (GtkWidget   *widget,
 203                                              guint        n_pspecs,
 204                                              GParamSpec **pspecs);
 205
 206   /* basics */
 207   void (* destroy)             (GtkWidget        *widget);
 208   void (* show)                (GtkWidget        *widget);
 209   void (* show_all)            (GtkWidget        *widget);
 210   void (* hide)                (GtkWidget        *widget);
 211   void (* map)                 (GtkWidget        *widget);
 212   void (* unmap)               (GtkWidget        *widget);
 213   void (* realize)             (GtkWidget        *widget);
 214   void (* unrealize)           (GtkWidget        *widget);
 215   void (* size_allocate)       (GtkWidget        *widget,
 216                                 GtkAllocation    *allocation);
 217   void (* state_changed)       (GtkWidget        *widget,
 218                                 GtkStateType      previous_state);
 219   void (* state_flags_changed) (GtkWidget        *widget,
 220                                 GtkStateFlags     previous_state_flags);
 221   void (* parent_set)          (GtkWidget        *widget,
 222                                 GtkWidget        *previous_parent);
 223   void (* hierarchy_changed)   (GtkWidget        *widget,
 224                                 GtkWidget        *previous_toplevel);
 225   void (* style_set)           (GtkWidget        *widget,
 226                                 GtkStyle         *previous_style);
 227   void (* direction_changed)   (GtkWidget        *widget,
 228                                 GtkTextDirection  previous_direction);
 229   void (* grab_notify)         (GtkWidget        *widget,
 230                                 gboolean          was_grabbed);
 231   void (* child_notify)        (GtkWidget        *widget,
 232                                 GParamSpec       *child_property);
 233   gboolean (* draw)            (GtkWidget        *widget,
 234                                 cairo_t          *cr);
 235
 236   /* size requests */
 237   GtkSizeRequestMode (* get_request_mode)               (GtkWidget      *widget);
 238
 239   void               (* get_preferred_height)           (GtkWidget       *widget,
 240                                                          gint            *minimum_height,
 241                                                          gint            *natural_height);
 242   void               (* get_preferred_width_for_height) (GtkWidget       *widget,
 243                                                          gint             height,
 244                                                          gint            *minimum_width,
 245                                                          gint            *natural_width);
 246   void               (* get_preferred_width)            (GtkWidget       *widget,
 247                                                          gint            *minimum_width,
 248                                                          gint            *natural_width);
 249   void               (* get_preferred_height_for_width) (GtkWidget       *widget,
 250                                                          gint             width,
 251                                                          gint            *minimum_height,
 252                                                          gint            *natural_height);
 253
 254   /* Mnemonics */
 255   gboolean (* mnemonic_activate)        (GtkWidget           *widget,
 256                                          gboolean             group_cycling);
 257
 258   /* explicit focus */
 259   void     (* grab_focus)               (GtkWidget           *widget);
 260   gboolean (* focus)                    (GtkWidget           *widget,
 261                                          GtkDirectionType     direction);
 262
 263   /* keyboard navigation */
 264   void     (* move_focus)               (GtkWidget           *widget,
 265                                          GtkDirectionType     direction);
 266   gboolean (* keynav_failed)            (GtkWidget           *widget,
 267                                          GtkDirectionType     direction);
 268
 269   /* events */
 270   gboolean (* event)                    (GtkWidget           *widget,
 271                                          GdkEvent            *event);
 272   gboolean (* button_press_event)       (GtkWidget           *widget,
 273                                          GdkEventButton      *event);
 274   gboolean (* button_release_event)     (GtkWidget           *widget,
 275                                          GdkEventButton      *event);
 276   gboolean (* scroll_event)             (GtkWidget           *widget,
 277                                          GdkEventScroll      *event);
 278   gboolean (* motion_notify_event)      (GtkWidget           *widget,
 279                                          GdkEventMotion      *event);
 280   gboolean (* delete_event)             (GtkWidget           *widget,
 281                                          GdkEventAny         *event);
 282   gboolean (* destroy_event)            (GtkWidget           *widget,
 283                                          GdkEventAny         *event);
 284   gboolean (* key_press_event)          (GtkWidget           *widget,
 285                                          GdkEventKey         *event);
 286   gboolean (* key_release_event)        (GtkWidget           *widget,
 287                                          GdkEventKey         *event);
 288   gboolean (* enter_notify_event)       (GtkWidget           *widget,
 289                                          GdkEventCrossing    *event);
 290   gboolean (* leave_notify_event)       (GtkWidget           *widget,
 291                                          GdkEventCrossing    *event);
 292   gboolean (* configure_event)          (GtkWidget           *widget,
 293                                          GdkEventConfigure   *event);
 294   gboolean (* focus_in_event)           (GtkWidget           *widget,
 295                                          GdkEventFocus       *event);
 296   gboolean (* focus_out_event)          (GtkWidget           *widget,
 297                                          GdkEventFocus       *event);
 298   gboolean (* map_event)                (GtkWidget           *widget,
 299                                          GdkEventAny         *event);
 300   gboolean (* unmap_event)              (GtkWidget           *widget,
 301                                          GdkEventAny         *event);
 302   gboolean (* property_notify_event)    (GtkWidget           *widget,
 303                                          GdkEventProperty    *event);
 304   gboolean (* selection_clear_event)    (GtkWidget           *widget,
 305                                          GdkEventSelection   *event);
 306   gboolean (* selection_request_event)  (GtkWidget           *widget,
 307                                          GdkEventSelection   *event);
 308   gboolean (* selection_notify_event)   (GtkWidget           *widget,
 309                                          GdkEventSelection   *event);
 310   gboolean (* proximity_in_event)       (GtkWidget           *widget,
 311                                          GdkEventProximity   *event);
 312   gboolean (* proximity_out_event)      (GtkWidget           *widget,
 313                                          GdkEventProximity   *event);
 314   gboolean (* visibility_notify_event)  (GtkWidget           *widget,
 315                                          GdkEventVisibility  *event);
 316   gboolean (* window_state_event)       (GtkWidget           *widget,
 317                                          GdkEventWindowState *event);
 318   gboolean (* damage_event)             (GtkWidget           *widget,
 319                                          GdkEventExpose      *event);
 320   gboolean (* grab_broken_event)        (GtkWidget           *widget,
 321                                          GdkEventGrabBroken  *event);
 322
 323   /* selection */
 324   void     (* selection_get)       (GtkWidget          *widget,
 325                                     GtkSelectionData   *selection_data,
 326                                     guint               info,
 327                                     guint               time_);
 328   void     (* selection_received)  (GtkWidget          *widget,
 329                                     GtkSelectionData   *selection_data,
 330                                     guint               time_);
 331
 332   /* Source side drag signals */
 333   void     (* drag_begin)          (GtkWidget         *widget,
 334                                     GdkDragContext     *context);
 335   void     (* drag_end)            (GtkWidget          *widget,
 336                                     GdkDragContext     *context);
 337   void     (* drag_data_get)       (GtkWidget          *widget,
 338                                     GdkDragContext     *context,
 339                                     GtkSelectionData   *selection_data,
 340                                     guint               info,
 341                                     guint               time_);
 342   void     (* drag_data_delete)    (GtkWidget          *widget,
 343                                     GdkDragContext     *context);
 344
 345   /* Target side drag signals */
 346   void     (* drag_leave)          (GtkWidget          *widget,
 347                                     GdkDragContext     *context,
 348                                     guint               time_);
 349   gboolean (* drag_motion)         (GtkWidget          *widget,
 350                                     GdkDragContext     *context,
 351                                     gint                x,
 352                                     gint                y,
 353                                     guint               time_);
 354   gboolean (* drag_drop)           (GtkWidget          *widget,
 355                                     GdkDragContext     *context,
 356                                     gint                x,
 357                                     gint                y,
 358                                     guint               time_);
 359   void     (* drag_data_received)  (GtkWidget          *widget,
 360                                     GdkDragContext     *context,
 361                                     gint                x,
 362                                     gint                y,
 363                                     GtkSelectionData   *selection_data,
 364                                     guint               info,
 365                                     guint               time_);
 366   gboolean (* drag_failed)         (GtkWidget          *widget,
 367                                     GdkDragContext     *context,
 368                                     GtkDragResult       result);
 369
 370   /* Signals used only for keybindings */
 371   gboolean (* popup_menu)          (GtkWidget          *widget);
 372
 373   /* If a widget has multiple tooltips/whatsthis, it should show the
 374    * one for the current focus location, or if that doesn't make
 375    * sense, should cycle through them showing each tip alongside
 376    * whatever piece of the widget it applies to.
 377    */
 378   gboolean (* show_help)           (GtkWidget          *widget,
 379                                     GtkWidgetHelpType   help_type);
 380
 381   /* accessibility support
 382    */
 383   AtkObject *  (* get_accessible)     (GtkWidget *widget);
 384
 385   void         (* screen_changed)     (GtkWidget *widget,
 386                                        GdkScreen *previous_screen);
 387   gboolean     (* can_activate_accel) (GtkWidget *widget,
 388                                        guint      signal_id);
 389
 390
 391   void         (* composited_changed) (GtkWidget *widget);
 392
 393   gboolean     (* query_tooltip)      (GtkWidget  *widget,
 394                                        gint        x,
 395                                        gint        y,
 396                                        gboolean    keyboard_tooltip,
 397                                        GtkTooltip *tooltip);
 398
 399   void         (* compute_expand)     (GtkWidget  *widget,
 400                                        gboolean   *hexpand_p,
 401                                        gboolean   *vexpand_p);
 402
 403   void         (* adjust_size_request)    (GtkWidget         *widget,
 404                                            GtkOrientation     orientation,
 405                                            gint              *minimum_size,
 406                                            gint              *natural_size);
 407   void         (* adjust_size_allocation) (GtkWidget         *widget,
 408                                            GtkOrientation     orientation,
 409                                            gint              *minimum_size,
 410                                            gint              *natural_size,
 411                                            gint              *allocated_pos,
 412                                            gint              *allocated_size);
 413
 414   void         (* style_updated)          (GtkWidget *widget);
 415
 416   gboolean     (* touch_event)            (GtkWidget     *widget,
 417                                            GdkEventTouch *event);
 418
 419   /*< private >*/
 420
 421   GtkWidgetClassPrivate *priv;
 422
 423   /* Padding for future expansion */
 424   void (*_gtk_reserved2) (void);
 425   void (*_gtk_reserved3) (void);
 426   void (*_gtk_reserved4) (void);
 427   void (*_gtk_reserved5) (void);
 428   void (*_gtk_reserved6) (void);
 429   void (*_gtk_reserved7) (void);
 430 };
 431
 432 struct _GtkWidgetAuxInfo
 433 {
 434   gint width;
 435   gint height;
 436
 437   guint   halign : 4;
 438   guint   valign : 4;
 439
 440   GtkBorder margin;
 441 };
 442
 443 GType      gtk_widget_get_type            (void) G_GNUC_CONST;
 444 GtkWidget* gtk_widget_new                 (GType                type,
 445                                            const gchar         *first_property_name,
 446                                            ...);
 447 void       gtk_widget_destroy             (GtkWidget           *widget);
 448 void       gtk_widget_destroyed           (GtkWidget           *widget,
 449                                            GtkWidget          **widget_pointer);
 450 void       gtk_widget_unparent            (GtkWidget           *widget);
 451 void       gtk_widget_show                (GtkWidget           *widget);
 452 void       gtk_widget_hide                (GtkWidget           *widget);
 453 void       gtk_widget_show_now            (GtkWidget           *widget);
 454 void       gtk_widget_show_all            (GtkWidget           *widget);
 455 void       gtk_widget_set_no_show_all     (GtkWidget           *widget,
 456                                            gboolean             no_show_all);
 457 gboolean   gtk_widget_get_no_show_all     (GtkWidget           *widget);
 458 void       gtk_widget_map                 (GtkWidget           *widget);
 459 void       gtk_widget_unmap               (GtkWidget           *widget);
 460 void       gtk_widget_realize             (GtkWidget           *widget);
 461 void       gtk_widget_unrealize           (GtkWidget           *widget);
 462
 463 void       gtk_widget_draw                (GtkWidget           *widget,
 464                                            cairo_t             *cr);
 465 /* Queuing draws */
 466 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 467 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 468                                            gint                 x,
 469                                            gint                 y,
 470                                            gint                 width,
 471                                            gint                 height);
 472 void       gtk_widget_queue_draw_region   (GtkWidget           *widget,
 473                                            const cairo_region_t*region);
 474 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 475 void       gtk_widget_queue_resize_no_redraw (GtkWidget *widget);
 476 GdkFrameClock* gtk_widget_get_frame_clock (GtkWidget           *widget);
 477
 478 GDK_DEPRECATED_IN_3_0_FOR(gtk_widget_get_preferred_size)
 479 void       gtk_widget_size_request        (GtkWidget           *widget,
 480                                            GtkRequisition      *requisition);
 481 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 482                                            GtkAllocation       *allocation);
 483
 484 GtkSizeRequestMode  gtk_widget_get_request_mode               (GtkWidget      *widget);
 485 void                gtk_widget_get_preferred_width            (GtkWidget      *widget,
 486                                                                gint           *minimum_width,
 487                                                                gint           *natural_width);
 488 void                gtk_widget_get_preferred_height_for_width (GtkWidget      *widget,
 489                                                                gint            width,
 490                                                                gint           *minimum_height,
 491                                                                gint           *natural_height);
 492 void                gtk_widget_get_preferred_height           (GtkWidget      *widget,
 493                                                                gint           *minimum_height,
 494                                                                gint           *natural_height);
 495 void                gtk_widget_get_preferred_width_for_height (GtkWidget      *widget,
 496                                                                gint            height,
 497                                                                gint           *minimum_width,
 498                                                                gint           *natural_width);
 499 void                gtk_widget_get_preferred_size             (GtkWidget      *widget,
 500                                                                GtkRequisition *minimum_size,
 501                                                                GtkRequisition *natural_size);
 502
 503 GDK_DEPRECATED_IN_3_0_FOR(gtk_widget_get_preferred_size)
 504 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 505                                              GtkRequisition    *requisition);
 506 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 507                                            const gchar         *accel_signal,
 508                                            GtkAccelGroup       *accel_group,
 509                                            guint                accel_key,
 510                                            GdkModifierType      accel_mods,
 511                                            GtkAccelFlags        accel_flags);
 512 gboolean   gtk_widget_remove_accelerator  (GtkWidget           *widget,
 513                                            GtkAccelGroup       *accel_group,
 514                                            guint                accel_key,
 515                                            GdkModifierType      accel_mods);
 516 void       gtk_widget_set_accel_path      (GtkWidget           *widget,
 517                                            const gchar         *accel_path,
 518                                            GtkAccelGroup       *accel_group);
 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 GDK_AVAILABLE_IN_3_2
 552 gboolean   gtk_widget_has_visible_focus   (GtkWidget           *widget);
 553 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 554
 555 void       gtk_widget_set_can_default     (GtkWidget           *widget,
 556                                            gboolean             can_default);
 557 gboolean   gtk_widget_get_can_default     (GtkWidget           *widget);
 558 gboolean   gtk_widget_has_default         (GtkWidget           *widget);
 559 void       gtk_widget_grab_default        (GtkWidget           *widget);
 560
 561 void      gtk_widget_set_receives_default (GtkWidget           *widget,
 562                                            gboolean             receives_default);
 563 gboolean  gtk_widget_get_receives_default (GtkWidget           *widget);
 564
 565 gboolean   gtk_widget_has_grab            (GtkWidget           *widget);
 566
 567 gboolean   gtk_widget_device_is_shadowed  (GtkWidget           *widget,
 568                                            GdkDevice           *device);
 569
 570
 571 void                  gtk_widget_set_name               (GtkWidget    *widget,
 572                                                          const gchar  *name);
 573 const gchar *         gtk_widget_get_name               (GtkWidget    *widget);
 574
 575 void                  gtk_widget_set_state              (GtkWidget    *widget,
 576                                                          GtkStateType  state);
 577 GtkStateType          gtk_widget_get_state              (GtkWidget    *widget);
 578
 579 void                  gtk_widget_set_state_flags        (GtkWidget     *widget,
 580                                                          GtkStateFlags  flags,
 581                                                          gboolean       clear);
 582 void                  gtk_widget_unset_state_flags      (GtkWidget     *widget,
 583                                                          GtkStateFlags  flags);
 584 GtkStateFlags         gtk_widget_get_state_flags        (GtkWidget     *widget);
 585
 586 void                  gtk_widget_set_sensitive          (GtkWidget    *widget,
 587                                                          gboolean      sensitive);
 588 gboolean              gtk_widget_get_sensitive          (GtkWidget    *widget);
 589 gboolean              gtk_widget_is_sensitive           (GtkWidget    *widget);
 590
 591 void                  gtk_widget_set_visible            (GtkWidget    *widget,
 592                                                          gboolean      visible);
 593 gboolean              gtk_widget_get_visible            (GtkWidget    *widget);
 594 gboolean              gtk_widget_is_visible             (GtkWidget    *widget);
 595
 596 void                  gtk_widget_set_has_window         (GtkWidget    *widget,
 597                                                          gboolean      has_window);
 598 gboolean              gtk_widget_get_has_window         (GtkWidget    *widget);
 599
 600 gboolean              gtk_widget_is_toplevel            (GtkWidget    *widget);
 601 gboolean              gtk_widget_is_drawable            (GtkWidget    *widget);
 602 void                  gtk_widget_set_realized           (GtkWidget    *widget,
 603                                                          gboolean      realized);
 604 gboolean              gtk_widget_get_realized           (GtkWidget    *widget);
 605 void                  gtk_widget_set_mapped             (GtkWidget    *widget,
 606                                                          gboolean      mapped);
 607 gboolean              gtk_widget_get_mapped             (GtkWidget    *widget);
 608
 609 void                  gtk_widget_set_app_paintable      (GtkWidget    *widget,
 610                                                          gboolean      app_paintable);
 611 gboolean              gtk_widget_get_app_paintable      (GtkWidget    *widget);
 612
 613 void                  gtk_widget_set_double_buffered    (GtkWidget    *widget,
 614                                                          gboolean      double_buffered);
 615 gboolean              gtk_widget_get_double_buffered    (GtkWidget    *widget);
 616
 617 void                  gtk_widget_set_redraw_on_allocate (GtkWidget    *widget,
 618                                                          gboolean      redraw_on_allocate);
 619
 620 void                  gtk_widget_set_parent             (GtkWidget    *widget,
 621                                                          GtkWidget    *parent);
 622 GtkWidget           * gtk_widget_get_parent             (GtkWidget    *widget);
 623
 624 void                  gtk_widget_set_parent_window      (GtkWidget    *widget,
 625                                                          GdkWindow    *parent_window);
 626 GdkWindow           * gtk_widget_get_parent_window      (GtkWidget    *widget);
 627
 628 void                  gtk_widget_set_child_visible      (GtkWidget    *widget,
 629                                                          gboolean      is_visible);
 630 gboolean              gtk_widget_get_child_visible      (GtkWidget    *widget);
 631
 632 void                  gtk_widget_set_window             (GtkWidget    *widget,
 633                                                          GdkWindow    *window);
 634 GdkWindow           * gtk_widget_get_window             (GtkWidget    *widget);
 635 GDK_AVAILABLE_IN_3_8
 636 void                  gtk_widget_register_window        (GtkWidget    *widget,
 637                                                          GdkWindow    *window);
 638 GDK_AVAILABLE_IN_3_8
 639 void                  gtk_widget_unregister_window      (GtkWidget    *widget,
 640                                                          GdkWindow    *window);
 641
 642 int                   gtk_widget_get_allocated_width    (GtkWidget     *widget);
 643 int                   gtk_widget_get_allocated_height   (GtkWidget     *widget);
 644
 645 void                  gtk_widget_get_allocation         (GtkWidget     *widget,
 646                                                          GtkAllocation *allocation);
 647 void                  gtk_widget_set_allocation         (GtkWidget     *widget,
 648                                                          const GtkAllocation *allocation);
 649
 650 void                  gtk_widget_get_requisition        (GtkWidget     *widget,
 651                                                          GtkRequisition *requisition);
 652
 653 gboolean   gtk_widget_child_focus         (GtkWidget           *widget,
 654                                            GtkDirectionType     direction);
 655 gboolean   gtk_widget_keynav_failed       (GtkWidget           *widget,
 656                                            GtkDirectionType     direction);
 657 void       gtk_widget_error_bell          (GtkWidget           *widget);
 658
 659 void       gtk_widget_set_size_request    (GtkWidget           *widget,
 660                                            gint                 width,
 661                                            gint                 height);
 662 void       gtk_widget_get_size_request    (GtkWidget           *widget,
 663                                            gint                *width,
 664                                            gint                *height);
 665 void       gtk_widget_set_events          (GtkWidget           *widget,
 666                                            gint                 events);
 667 void       gtk_widget_add_events          (GtkWidget           *widget,
 668                                            gint                 events);
 669 void       gtk_widget_set_device_events   (GtkWidget           *widget,
 670                                            GdkDevice           *device,
 671                                            GdkEventMask         events);
 672 void       gtk_widget_add_device_events   (GtkWidget           *widget,
 673                                            GdkDevice           *device,
 674                                            GdkEventMask         events);
 675 GDK_AVAILABLE_IN_3_8
 676 void       gtk_widget_set_opacity         (GtkWidget           *widget,
 677                                            double               opacity);
 678 GDK_AVAILABLE_IN_3_8
 679 double     gtk_widget_get_opacity         (GtkWidget           *widget);
 680
 681 void       gtk_widget_set_device_enabled  (GtkWidget    *widget,
 682                                            GdkDevice    *device,
 683                                            gboolean      enabled);
 684 gboolean   gtk_widget_get_device_enabled  (GtkWidget    *widget,
 685                                            GdkDevice    *device);
 686
 687 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 688 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 689                                          GType           widget_type);
 690 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 691 void         gtk_widget_set_visual      (GtkWidget      *widget,
 692                                          GdkVisual      *visual);
 693
 694 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
 695 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
 696 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);
 697 GdkWindow *   gtk_widget_get_root_window (GtkWidget *widget);
 698 GtkSettings*  gtk_widget_get_settings    (GtkWidget *widget);
 699 GtkClipboard *gtk_widget_get_clipboard   (GtkWidget *widget,
 700                                           GdkAtom    selection);
 701
 702
 703 /* Expand flags and related support */
 704 gboolean gtk_widget_get_hexpand          (GtkWidget      *widget);
 705 void     gtk_widget_set_hexpand          (GtkWidget      *widget,
 706                                           gboolean        expand);
 707 gboolean gtk_widget_get_hexpand_set      (GtkWidget      *widget);
 708 void     gtk_widget_set_hexpand_set      (GtkWidget      *widget,
 709                                           gboolean        set);
 710 gboolean gtk_widget_get_vexpand          (GtkWidget      *widget);
 711 void     gtk_widget_set_vexpand          (GtkWidget      *widget,
 712                                           gboolean        expand);
 713 gboolean gtk_widget_get_vexpand_set      (GtkWidget      *widget);
 714 void     gtk_widget_set_vexpand_set      (GtkWidget      *widget,
 715                                           gboolean        set);
 716 void     gtk_widget_queue_compute_expand (GtkWidget      *widget);
 717 gboolean gtk_widget_compute_expand       (GtkWidget      *widget,
 718                                           GtkOrientation  orientation);
 719
 720
 721 /* Multidevice support */
 722 gboolean         gtk_widget_get_support_multidevice (GtkWidget      *widget);
 723 void             gtk_widget_set_support_multidevice (GtkWidget      *widget,
 724                                                      gboolean        support_multidevice);
 725
 726 /* Accessibility support */
 727 GDK_AVAILABLE_IN_3_2
 728 void             gtk_widget_class_set_accessible_type    (GtkWidgetClass     *widget_class,
 729                                                           GType               type);
 730 GDK_AVAILABLE_IN_3_2
 731 void             gtk_widget_class_set_accessible_role    (GtkWidgetClass     *widget_class,
 732                                                           AtkRole             role);
 733 AtkObject*       gtk_widget_get_accessible               (GtkWidget          *widget);
 734
 735
 736 /* Margin and alignment */
 737 GtkAlign gtk_widget_get_halign        (GtkWidget *widget);
 738 void     gtk_widget_set_halign        (GtkWidget *widget,
 739                                        GtkAlign   align);
 740 GtkAlign gtk_widget_get_valign        (GtkWidget *widget);
 741 void     gtk_widget_set_valign        (GtkWidget *widget,
 742                                        GtkAlign   align);
 743 gint     gtk_widget_get_margin_left   (GtkWidget *widget);
 744 void     gtk_widget_set_margin_left   (GtkWidget *widget,
 745                                        gint       margin);
 746 gint     gtk_widget_get_margin_right  (GtkWidget *widget);
 747 void     gtk_widget_set_margin_right  (GtkWidget *widget,
 748                                        gint       margin);
 749 gint     gtk_widget_get_margin_top    (GtkWidget *widget);
 750 void     gtk_widget_set_margin_top    (GtkWidget *widget,
 751                                        gint       margin);
 752 gint     gtk_widget_get_margin_bottom (GtkWidget *widget);
 753 void     gtk_widget_set_margin_bottom (GtkWidget *widget,
 754                                        gint       margin);
 755
 756
 757 gint         gtk_widget_get_events      (GtkWidget      *widget);
 758 GdkEventMask gtk_widget_get_device_events (GtkWidget    *widget,
 759                                            GdkDevice    *device);
 760 GDK_DEPRECATED_IN_3_4_FOR(gdk_window_get_device_position)
 761 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 762                                          gint           *x,
 763                                          gint           *y);
 764
 765 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 766                                          GtkWidget      *ancestor);
 767
 768 gboolean     gtk_widget_translate_coordinates (GtkWidget  *src_widget,
 769                                                GtkWidget  *dest_widget,
 770                                                gint        src_x,
 771                                                gint        src_y,
 772                                                gint       *dest_x,
 773                                                gint       *dest_y);
 774
 775 /* Hide widget and return TRUE.
 776  */
 777 gboolean     gtk_widget_hide_on_delete  (GtkWidget      *widget);
 778
 779 /* Functions to override widget styling */
 780 void         gtk_widget_override_color            (GtkWidget     *widget,
 781                                                    GtkStateFlags  state,
 782                                                    const GdkRGBA *color);
 783 void         gtk_widget_override_background_color (GtkWidget     *widget,
 784                                                    GtkStateFlags  state,
 785                                                    const GdkRGBA *color);
 786
 787 void         gtk_widget_override_font             (GtkWidget                  *widget,
 788                                                    const PangoFontDescription *font_desc);
 789
 790 void         gtk_widget_override_symbolic_color   (GtkWidget     *widget,
 791                                                    const gchar   *name,
 792                                                    const GdkRGBA *color);
 793 void         gtk_widget_override_cursor           (GtkWidget       *widget,
 794                                                    const GdkRGBA   *cursor,
 795                                                    const GdkRGBA   *secondary_cursor);
 796
 797 void       gtk_widget_reset_style       (GtkWidget      *widget);
 798
 799 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 800 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 801 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 802                                                const gchar *text);
 803
 804 GdkPixbuf    *gtk_widget_render_icon_pixbuf   (GtkWidget   *widget,
 805                                                const gchar *stock_id,
 806                                                GtkIconSize  size);
 807
 808 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 809  * the returned name is newly allocated.
 810  */
 811 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 812                                          const gchar    *name);
 813 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 814
 815 /* Push/pop pairs, to change default values upon a widget's creation.
 816  * This will override the values that got set by the
 817  * gtk_widget_set_default_* () functions.
 818  */
 819 void         gtk_widget_push_composite_child (void);
 820 void         gtk_widget_pop_composite_child  (void);
 821
 822 /* widget style properties
 823  */
 824 void gtk_widget_class_install_style_property        (GtkWidgetClass     *klass,
 825                                                      GParamSpec         *pspec);
 826 void gtk_widget_class_install_style_property_parser (GtkWidgetClass     *klass,
 827                                                      GParamSpec         *pspec,
 828                                                      GtkRcPropertyParser parser);
 829 GParamSpec*  gtk_widget_class_find_style_property   (GtkWidgetClass     *klass,
 830                                                      const gchar        *property_name);
 831 GParamSpec** gtk_widget_class_list_style_properties (GtkWidgetClass     *klass,
 832                                                      guint              *n_properties);
 833 void gtk_widget_style_get_property (GtkWidget        *widget,
 834                                     const gchar    *property_name,
 835                                     GValue           *value);
 836 void gtk_widget_style_get_valist   (GtkWidget        *widget,
 837                                     const gchar    *first_property_name,
 838                                     va_list         var_args);
 839 void gtk_widget_style_get          (GtkWidget        *widget,
 840                                     const gchar    *first_property_name,
 841                                     ...) G_GNUC_NULL_TERMINATED;
 842
 843 /* Functions for setting directionality for widgets */
 844
 845 void             gtk_widget_set_direction         (GtkWidget        *widget,
 846                                                    GtkTextDirection  dir);
 847 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 848
 849 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 850 GtkTextDirection gtk_widget_get_default_direction (void);
 851
 852 /* Compositing manager functionality */
 853 gboolean gtk_widget_is_composited (GtkWidget *widget);
 854
 855 /* Counterpart to gdk_window_shape_combine_region.
 856  */
 857 void         gtk_widget_shape_combine_region (GtkWidget *widget,
 858                                               cairo_region_t *region);
 859 void         gtk_widget_input_shape_combine_region (GtkWidget *widget,
 860                                                     cairo_region_t *region);
 861
 862 GList* gtk_widget_list_mnemonic_labels  (GtkWidget *widget);
 863 void   gtk_widget_add_mnemonic_label    (GtkWidget *widget,
 864                                          GtkWidget *label);
 865 void   gtk_widget_remove_mnemonic_label (GtkWidget *widget,
 866                                          GtkWidget *label);
 867
 868 void                  gtk_widget_set_tooltip_window    (GtkWidget   *widget,
 869                                                         GtkWindow   *custom_window);
 870 GtkWindow *gtk_widget_get_tooltip_window    (GtkWidget   *widget);
 871 void       gtk_widget_trigger_tooltip_query (GtkWidget   *widget);
 872 void       gtk_widget_set_tooltip_text      (GtkWidget   *widget,
 873                                              const gchar *text);
 874 gchar *    gtk_widget_get_tooltip_text      (GtkWidget   *widget);
 875 void       gtk_widget_set_tooltip_markup    (GtkWidget   *widget,
 876                                              const gchar *markup);
 877 gchar *    gtk_widget_get_tooltip_markup    (GtkWidget   *widget);
 878 void       gtk_widget_set_has_tooltip       (GtkWidget   *widget,
 879                                              gboolean     has_tooltip);
 880 gboolean   gtk_widget_get_has_tooltip       (GtkWidget   *widget);
 881
 882 gboolean   gtk_cairo_should_draw_window     (cairo_t     *cr,
 883                                              GdkWindow   *window);
 884 void       gtk_cairo_transform_to_window    (cairo_t     *cr,
 885                                              GtkWidget   *widget,
 886                                              GdkWindow   *window);
 887
 888 GType           gtk_requisition_get_type (void) G_GNUC_CONST;
 889 GtkRequisition *gtk_requisition_new      (void) G_GNUC_MALLOC;
 890 GtkRequisition *gtk_requisition_copy     (const GtkRequisition *requisition);
 891 void            gtk_requisition_free     (GtkRequisition       *requisition);
 892
 893 gboolean     gtk_widget_in_destruction (GtkWidget *widget);
 894
 895 GtkStyleContext * gtk_widget_get_style_context (GtkWidget *widget);
 896
 897 GtkWidgetPath *   gtk_widget_get_path (GtkWidget *widget);
 898
 899 GDK_AVAILABLE_IN_3_4
 900 GdkModifierType   gtk_widget_get_modifier_mask (GtkWidget         *widget,
 901                                                 GdkModifierIntent  intent);
 902
 903 GDK_AVAILABLE_IN_3_6
 904 void                    gtk_widget_insert_action_group                  (GtkWidget    *widget,
 905                                                                          const gchar  *name,
 906                                                                          GActionGroup *group);
 907
 908 G_END_DECLS
 909
 910 #endif /* __GTK_WIDGET_H__ */