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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  28 #error "Only <gtk/gtk.h> can be included directly."
  29 #endif
  30
  31 #ifndef __GTK_WIDGET_H__
  32 #define __GTK_WIDGET_H__
  33
  34 #include <gdk/gdk.h>
  35 #include <gtk/gtkaccelgroup.h>
  36 #include <gtk/gtkadjustment.h>
  37 #include <gtk/gtkstyle.h>
  38 #include <gtk/gtksettings.h>
  39 #include <gtk/gtkstylecontext.h>
  40 #include <gtk/gtkwidgetpath.h>
  41 #include <atk/atk.h>
  42
  43 G_BEGIN_DECLS
  44
  45 /* Kinds of widget-specific help */
  46 typedef enum
  47 {
  48   GTK_WIDGET_HELP_TOOLTIP,
  49   GTK_WIDGET_HELP_WHATS_THIS
  50 } GtkWidgetHelpType;
  51
  52 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
  53  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
  54  */
  55 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
  56 #define GTK_WIDGET(widget)                (G_TYPE_CHECK_INSTANCE_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
  57 #define GTK_WIDGET_CLASS(klass)           (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
  58 #define GTK_IS_WIDGET(widget)             (G_TYPE_CHECK_INSTANCE_TYPE ((widget), GTK_TYPE_WIDGET))
  59 #define GTK_IS_WIDGET_CLASS(klass)        (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
  60 #define GTK_WIDGET_GET_CLASS(obj)         (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
  61
  62 #define GTK_TYPE_REQUISITION              (gtk_requisition_get_type ())
  63
  64 /* forward declaration to avoid excessive includes (and concurrent includes)
  65  */
  66 typedef struct _GtkRequisition     GtkRequisition;
  67 typedef struct _GtkSelectionData   GtkSelectionData;
  68 typedef struct _GtkWidgetPrivate   GtkWidgetPrivate;
  69 typedef struct _GtkWidgetClass     GtkWidgetClass;
  70 typedef struct _GtkWidgetAuxInfo   GtkWidgetAuxInfo;
  71 typedef struct _GtkClipboard       GtkClipboard;
  72 typedef struct _GtkTooltip         GtkTooltip;
  73 typedef struct _GtkWindow          GtkWindow;
  74
  75
  76 /**
  77  * GtkAllocation:
  78  * @x: the X position of the widget's area relative to its parents allocation.
  79  * @y: the Y position of the widget's area relative to its parents allocation.
  80  * @width: the width of the widget's allocated area.
  81  * @height: the height of the widget's allocated area.
  82  *
  83  * A <structname>GtkAllocation</structname> of a widget represents region
  84  * which has been allocated to the widget by its parent. It is a subregion
  85  * of its parents allocation. See <xref linkend="geometry-management"/> for
  86  * more information.
  87  */
  88 typedef         GdkRectangle       GtkAllocation;
  89
  90 /**
  91  * GtkCallback:
  92  * @widget: the widget to operate on
  93  * @data: user-supplied data
  94  *
  95  * The type of the callback functions used for e.g. iterating over
  96  * the children of a container, see gtk_container_foreach().
  97  */
  98 typedef void    (*GtkCallback)     (GtkWidget        *widget,
  99                                     gpointer          data);
 100
 101 /**
 102  * GtkRequisition:
 103  * @width: the widget's desired width
 104  * @height: the widget's desired height
 105  *
 106  * A <structname>GtkRequisition</structname> represents the desired size of a widget. See
 107  * <xref linkend="geometry-management"/> for more information.
 108  */
 109 struct _GtkRequisition
 110 {
 111   gint width;
 112   gint height;
 113 };
 114
 115 /* The widget is the base of the tree for displayable objects.
 116  *  (A displayable object is one which takes up some amount
 117  *  of screen real estate). It provides a common base and interface
 118  *  which actual widgets must adhere to.
 119  */
 120 struct _GtkWidget
 121 {
 122   GInitiallyUnowned parent_instance;
 123
 124   GtkWidgetPrivate *priv;
 125 };
 126
 127 /**
 128  * GtkWidgetClass:
 129  * @parent_class: The object class structure needs to be the first
 130  *   element in the widget class structure in order for the class mechanism
 131  *   to work correctly. This allows a GtkWidgetClass pointer to be cast to
 132  *   a GObjectClass pointer.
 133  * @activate_signal: The signal to emit when a widget of this class is
 134  *   activated, gtk_widget_activate() handles the emission.
 135  *   Implementation of this signal is optional.
 136  * @get_request_mode: This allows a widget to tell its parent container whether
 137  *   it prefers to be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
 138  *   %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
 139  *   %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH means the widget prefers to have
 140  *   #GtkWidgetClass.get_preferred_width() called and then
 141  *   #GtkWidgetClass.get_preferred_height_for_width() and is the default
 142  *   return for unimplemented cases.
 143  *   However it's important to note (as described below) that any widget
 144  *   which trades height-for-width must respond properly to both
 145  *   #GtkSizeRequestModes since it might be queried in either orientation
 146  *   by its parent container.
 147  * @get_preferred_height: This is called by containers to obtain the minimum
 148  *   and natural height of a widget. A widget that does not actually trade
 149  *   any height for width or width for height only has to implement these
 150  *   two virtual methods (#GtkWidgetClass.get_preferred_width() and
 151  *   #GtkWidgetClass.get_preferred_height()).
 152  * @get_preferred_width_for_height: This is analogous to
 153  *   #GtkWidgetClass.get_preferred_height_for_width() except that it
 154  *   operates in the oposite orientation. It's rare that a widget actually
 155  *   does %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT requests but this can happen
 156  *   when, for example, a widget or container gets additional columns to
 157  *   compensate for a smaller allocated height.
 158  * @get_preferred_width: This is called by containers to obtain the minimum
 159  *   and natural width of a widget. A widget will never be allocated a width
 160  *   less than its minimum and will only ever be allocated a width greater
 161  *   than the natural width once all of the said widget's siblings have
 162  *   received their natural widths.
 163  *   Furthermore, a widget will only ever be allocated a width greater than
 164  *   its natural width if it was configured to receive extra expand space
 165  *   from its parent container.
 166  * @get_preferred_height_for_width: This is similar to
 167  *   #GtkWidgetClass.get_preferred_height() except that it is passed a
 168  *   contextual width to request height for. By implementing this virtual
 169  *   method it is possible for a #GtkLabel to tell its parent how much height
 170  *   would be required if the label were to be allocated a said width.
 171  * @adjust_size_request: Convert an initial size request from a widget's
 172  *   #GtkSizeRequest virtual method implementations into a size request to
 173  *   be used by parent containers in laying out the widget.
 174  *   adjust_size_request adjusts <emphasis>from</emphasis> a child widget's
 175  *   original request <emphasis>to</emphasis> what a parent container should
 176  *   use for layout. The @for_size argument will be -1 if the request should
 177  *   not be for a particular size in the opposing orientation, i.e. if the
 178  *   request is not height-for-width or width-for-height. If @for_size is
 179  *   greater than -1, it is the proposed allocation in the opposing
 180  *   orientation that we need the request for. Implementations of
 181  *   adjust_size_request should chain up to the default implementation,
 182  *   which applies #GtkWidget's margin properties and imposes any values
 183  *   from gtk_widget_set_size_request(). Chaining up should be last,
 184  *   <emphasis>after</emphasis> your subclass adjusts the request, so
 185  *   #GtkWidget can apply constraints and add the margin properly.
 186  * @adjust_size_allocation: Convert an initial size allocation assigned
 187  *   by a #GtkContainer using gtk_widget_size_allocate(), into an actual
 188  *   size allocation to be used by the widget. adjust_size_allocation
 189  *   adjusts <emphasis>to</emphasis> a child widget's actual allocation
 190  *   <emphasis>from</emphasis> what a parent container computed for the
 191  *   child. The adjusted allocation must be entirely within the original
 192  *   allocation. In any custom implementation, chain up to the default
 193  *   #GtkWidget implementation of this method, which applies the margin
 194  *   and alignment properties of #GtkWidget. Chain up
 195  *   <emphasis>before</emphasis> performing your own adjustments so your
 196  *   own adjustments remove more allocation after the #GtkWidget base
 197  *   class has already removed margin and alignment. The natural size
 198  *   passed in should be adjusted in the same way as the allocated size,
 199  *   which allows adjustments to perform alignments or other changes
 200  *   based on natural size.
 201  */
 202 struct _GtkWidgetClass
 203 {
 204   GInitiallyUnownedClass parent_class;
 205
 206   /*< public >*/
 207
 208   guint activate_signal;
 209
 210   /* seldomly overidden */
 211   void (*dispatch_child_properties_changed) (GtkWidget   *widget,
 212                                              guint        n_pspecs,
 213                                              GParamSpec **pspecs);
 214
 215   /* basics */
 216   void (* destroy)             (GtkWidget        *widget);
 217   void (* show)                (GtkWidget        *widget);
 218   void (* show_all)            (GtkWidget        *widget);
 219   void (* hide)                (GtkWidget        *widget);
 220   void (* map)                 (GtkWidget        *widget);
 221   void (* unmap)               (GtkWidget        *widget);
 222   void (* realize)             (GtkWidget        *widget);
 223   void (* unrealize)           (GtkWidget        *widget);
 224   void (* size_allocate)       (GtkWidget        *widget,
 225                                 GtkAllocation    *allocation);
 226   void (* state_changed)       (GtkWidget        *widget,
 227                                 GtkStateType      previous_state);
 228   void (* state_flags_changed) (GtkWidget        *widget,
 229                                 GtkStateFlags     previous_state_flags);
 230   void (* parent_set)          (GtkWidget        *widget,
 231                                 GtkWidget        *previous_parent);
 232   void (* hierarchy_changed)   (GtkWidget        *widget,
 233                                 GtkWidget        *previous_toplevel);
 234   void (* style_set)           (GtkWidget        *widget,
 235                                 GtkStyle         *previous_style);
 236   void (* direction_changed)   (GtkWidget        *widget,
 237                                 GtkTextDirection  previous_direction);
 238   void (* grab_notify)         (GtkWidget        *widget,
 239                                 gboolean          was_grabbed);
 240   void (* child_notify)        (GtkWidget        *widget,
 241                                 GParamSpec       *pspec);
 242   gboolean (* draw)            (GtkWidget        *widget,
 243                                 cairo_t          *cr);
 244
 245   /* size requests */
 246   GtkSizeRequestMode (* get_request_mode)               (GtkWidget      *widget);
 247
 248   void               (* get_preferred_height)           (GtkWidget       *widget,
 249                                                          gint            *minimum_height,
 250                                                          gint            *natural_height);
 251   void               (* get_preferred_width_for_height) (GtkWidget       *widget,
 252                                                          gint             height,
 253                                                          gint            *minimum_width,
 254                                                          gint            *natural_width);
 255   void               (* get_preferred_width)            (GtkWidget       *widget,
 256                                                          gint            *minimum_width,
 257                                                          gint            *natural_width);
 258   void               (* get_preferred_height_for_width) (GtkWidget       *widget,
 259                                                          gint             width,
 260                                                          gint            *minimum_height,
 261                                                          gint            *natural_height);
 262
 263   /* Mnemonics */
 264   gboolean (* mnemonic_activate)        (GtkWidget           *widget,
 265                                          gboolean             group_cycling);
 266
 267   /* explicit focus */
 268   void     (* grab_focus)               (GtkWidget           *widget);
 269   gboolean (* focus)                    (GtkWidget           *widget,
 270                                          GtkDirectionType     direction);
 271
 272   /* keyboard navigation */
 273   void     (* move_focus)               (GtkWidget           *widget,
 274                                          GtkDirectionType     direction);
 275   gboolean (* keynav_failed)            (GtkWidget           *widget,
 276                                          GtkDirectionType     direction);
 277
 278   /* events */
 279   gboolean (* event)                    (GtkWidget           *widget,
 280                                          GdkEvent            *event);
 281   gboolean (* button_press_event)       (GtkWidget           *widget,
 282                                          GdkEventButton      *event);
 283   gboolean (* button_release_event)     (GtkWidget           *widget,
 284                                          GdkEventButton      *event);
 285   gboolean (* scroll_event)             (GtkWidget           *widget,
 286                                          GdkEventScroll      *event);
 287   gboolean (* motion_notify_event)      (GtkWidget           *widget,
 288                                          GdkEventMotion      *event);
 289   gboolean (* delete_event)             (GtkWidget           *widget,
 290                                          GdkEventAny         *event);
 291   gboolean (* destroy_event)            (GtkWidget           *widget,
 292                                          GdkEventAny         *event);
 293   gboolean (* key_press_event)          (GtkWidget           *widget,
 294                                          GdkEventKey         *event);
 295   gboolean (* key_release_event)        (GtkWidget           *widget,
 296                                          GdkEventKey         *event);
 297   gboolean (* enter_notify_event)       (GtkWidget           *widget,
 298                                          GdkEventCrossing    *event);
 299   gboolean (* leave_notify_event)       (GtkWidget           *widget,
 300                                          GdkEventCrossing    *event);
 301   gboolean (* configure_event)          (GtkWidget           *widget,
 302                                          GdkEventConfigure   *event);
 303   gboolean (* focus_in_event)           (GtkWidget           *widget,
 304                                          GdkEventFocus       *event);
 305   gboolean (* focus_out_event)          (GtkWidget           *widget,
 306                                          GdkEventFocus       *event);
 307   gboolean (* map_event)                (GtkWidget           *widget,
 308                                          GdkEventAny         *event);
 309   gboolean (* unmap_event)              (GtkWidget           *widget,
 310                                          GdkEventAny         *event);
 311   gboolean (* property_notify_event)    (GtkWidget           *widget,
 312                                          GdkEventProperty    *event);
 313   gboolean (* selection_clear_event)    (GtkWidget           *widget,
 314                                          GdkEventSelection   *event);
 315   gboolean (* selection_request_event)  (GtkWidget           *widget,
 316                                          GdkEventSelection   *event);
 317   gboolean (* selection_notify_event)   (GtkWidget           *widget,
 318                                          GdkEventSelection   *event);
 319   gboolean (* proximity_in_event)       (GtkWidget           *widget,
 320                                          GdkEventProximity   *event);
 321   gboolean (* proximity_out_event)      (GtkWidget           *widget,
 322                                          GdkEventProximity   *event);
 323   gboolean (* visibility_notify_event)  (GtkWidget           *widget,
 324                                          GdkEventVisibility  *event);
 325   gboolean (* client_event)             (GtkWidget           *widget,
 326                                          GdkEventClient      *event);
 327   gboolean (* window_state_event)       (GtkWidget           *widget,
 328                                          GdkEventWindowState *event);
 329   gboolean (* damage_event)             (GtkWidget           *widget,
 330                                          GdkEventExpose      *event);
 331   gboolean (* grab_broken_event)        (GtkWidget           *widget,
 332                                          GdkEventGrabBroken  *event);
 333
 334   /* selection */
 335   void     (* selection_get)       (GtkWidget          *widget,
 336                                     GtkSelectionData   *selection_data,
 337                                     guint               info,
 338                                     guint               time_);
 339   void     (* selection_received)  (GtkWidget          *widget,
 340                                     GtkSelectionData   *selection_data,
 341                                     guint               time_);
 342
 343   /* Source side drag signals */
 344   void     (* drag_begin)          (GtkWidget         *widget,
 345                                     GdkDragContext     *context);
 346   void     (* drag_end)            (GtkWidget          *widget,
 347                                     GdkDragContext     *context);
 348   void     (* drag_data_get)       (GtkWidget          *widget,
 349                                     GdkDragContext     *context,
 350                                     GtkSelectionData   *selection_data,
 351                                     guint               info,
 352                                     guint               time_);
 353   void     (* drag_data_delete)    (GtkWidget          *widget,
 354                                     GdkDragContext     *context);
 355
 356   /* Target side drag signals */
 357   void     (* drag_leave)          (GtkWidget          *widget,
 358                                     GdkDragContext     *context,
 359                                     guint               time_);
 360   gboolean (* drag_motion)         (GtkWidget          *widget,
 361                                     GdkDragContext     *context,
 362                                     gint                x,
 363                                     gint                y,
 364                                     guint               time_);
 365   gboolean (* drag_drop)           (GtkWidget          *widget,
 366                                     GdkDragContext     *context,
 367                                     gint                x,
 368                                     gint                y,
 369                                     guint               time_);
 370   void     (* drag_data_received)  (GtkWidget          *widget,
 371                                     GdkDragContext     *context,
 372                                     gint                x,
 373                                     gint                y,
 374                                     GtkSelectionData   *selection_data,
 375                                     guint               info,
 376                                     guint               time_);
 377
 378   /* Signals used only for keybindings */
 379   gboolean (* popup_menu)          (GtkWidget          *widget);
 380
 381   /* If a widget has multiple tooltips/whatsthis, it should show the
 382    * one for the current focus location, or if that doesn't make
 383    * sense, should cycle through them showing each tip alongside
 384    * whatever piece of the widget it applies to.
 385    */
 386   gboolean (* show_help)           (GtkWidget          *widget,
 387                                     GtkWidgetHelpType   help_type);
 388
 389   /* accessibility support
 390    */
 391   AtkObject *  (* get_accessible)     (GtkWidget *widget);
 392
 393   void         (* screen_changed)     (GtkWidget *widget,
 394                                        GdkScreen *previous_screen);
 395   gboolean     (* can_activate_accel) (GtkWidget *widget,
 396                                        guint      signal_id);
 397
 398
 399   void         (* composited_changed) (GtkWidget *widget);
 400
 401   gboolean     (* query_tooltip)      (GtkWidget  *widget,
 402                                        gint        x,
 403                                        gint        y,
 404                                        gboolean    keyboard_tooltip,
 405                                        GtkTooltip *tooltip);
 406
 407   void         (* compute_expand)     (GtkWidget  *widget,
 408                                        gboolean   *hexpand_p,
 409                                        gboolean   *vexpand_p);
 410
 411   void         (* adjust_size_request)    (GtkWidget         *widget,
 412                                            GtkOrientation     orientation,
 413                                            gint              *minimum_size,
 414                                            gint              *natural_size);
 415   void         (* adjust_size_allocation) (GtkWidget         *widget,
 416                                            GtkOrientation     orientation,
 417                                            gint              *natural_size,
 418                                            gint              *allocated_pos,
 419                                            gint              *allocated_size);
 420
 421   void         (* style_updated)          (GtkWidget *widget);
 422
 423   /*< private >*/
 424
 425   /* Padding for future expansion */
 426   void (*_gtk_reserved1) (void);
 427   void (*_gtk_reserved2) (void);
 428   void (*_gtk_reserved3) (void);
 429   void (*_gtk_reserved4) (void);
 430   void (*_gtk_reserved5) (void);
 431   void (*_gtk_reserved6) (void);
 432   void (*_gtk_reserved7) (void);
 433   void (*_gtk_reserved8) (void);
 434 };
 435
 436 struct _GtkWidgetAuxInfo
 437 {
 438   gint width;
 439   gint height;
 440
 441   guint   halign : 4;
 442   guint   valign : 4;
 443
 444   GtkBorder margin;
 445 };
 446
 447 GType      gtk_widget_get_type            (void) G_GNUC_CONST;
 448 GtkWidget* gtk_widget_new                 (GType                type,
 449                                            const gchar         *first_property_name,
 450                                            ...);
 451 void       gtk_widget_destroy             (GtkWidget           *widget);
 452 void       gtk_widget_destroyed           (GtkWidget           *widget,
 453                                            GtkWidget          **widget_pointer);
 454 void       gtk_widget_unparent            (GtkWidget           *widget);
 455 void       gtk_widget_show                (GtkWidget           *widget);
 456 void       gtk_widget_hide                (GtkWidget           *widget);
 457 void       gtk_widget_show_now            (GtkWidget           *widget);
 458 void       gtk_widget_show_all            (GtkWidget           *widget);
 459 void       gtk_widget_set_no_show_all     (GtkWidget           *widget,
 460                                            gboolean             no_show_all);
 461 gboolean   gtk_widget_get_no_show_all     (GtkWidget           *widget);
 462 void       gtk_widget_map                 (GtkWidget           *widget);
 463 void       gtk_widget_unmap               (GtkWidget           *widget);
 464 void       gtk_widget_realize             (GtkWidget           *widget);
 465 void       gtk_widget_unrealize           (GtkWidget           *widget);
 466
 467 void       gtk_widget_draw                (GtkWidget           *widget,
 468                                            cairo_t             *cr);
 469 /* Queuing draws */
 470 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 471 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 472                                            gint                 x,
 473                                            gint                 y,
 474                                            gint                 width,
 475                                            gint                 height);
 476 void       gtk_widget_queue_draw_region   (GtkWidget           *widget,
 477                                            cairo_region_t      *region);
 478 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 479 void       gtk_widget_queue_resize_no_redraw (GtkWidget *widget);
 480 #ifndef GTK_DISABLE_DEPRECATED
 481 void       gtk_widget_size_request        (GtkWidget           *widget,
 482                                            GtkRequisition      *requisition);
 483 #endif
 484 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 485                                            GtkAllocation       *allocation);
 486
 487 GtkSizeRequestMode  gtk_widget_get_request_mode               (GtkWidget      *widget);
 488 void                gtk_widget_get_preferred_width            (GtkWidget      *widget,
 489                                                                gint           *minimum_width,
 490                                                                gint           *natural_width);
 491 void                gtk_widget_get_preferred_height_for_width (GtkWidget      *widget,
 492                                                                gint            width,
 493                                                                gint           *minimum_height,
 494                                                                gint           *natural_height);
 495 void                gtk_widget_get_preferred_height           (GtkWidget      *widget,
 496                                                                gint           *minimum_height,
 497                                                                gint           *natural_height);
 498 void                gtk_widget_get_preferred_width_for_height (GtkWidget      *widget,
 499                                                                gint            height,
 500                                                                gint           *minimum_width,
 501                                                                gint           *natural_width);
 502 void                gtk_widget_get_preferred_size             (GtkWidget      *widget,
 503                                                                GtkRequisition *minimum_size,
 504                                                                GtkRequisition *natural_size);
 505
 506 #ifndef GTK_DISABLE_DEPRECATED
 507 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 508                                              GtkRequisition    *requisition);
 509 #endif
 510 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 511                                            const gchar         *accel_signal,
 512                                            GtkAccelGroup       *accel_group,
 513                                            guint                accel_key,
 514                                            GdkModifierType      accel_mods,
 515                                            GtkAccelFlags        accel_flags);
 516 gboolean   gtk_widget_remove_accelerator  (GtkWidget           *widget,
 517                                            GtkAccelGroup       *accel_group,
 518                                            guint                accel_key,
 519                                            GdkModifierType      accel_mods);
 520 void       gtk_widget_set_accel_path      (GtkWidget           *widget,
 521                                            const gchar         *accel_path,
 522                                            GtkAccelGroup       *accel_group);
 523 const gchar* _gtk_widget_get_accel_path   (GtkWidget           *widget,
 524                                            gboolean            *locked);
 525 GList*     gtk_widget_list_accel_closures (GtkWidget           *widget);
 526 gboolean   gtk_widget_can_activate_accel  (GtkWidget           *widget,
 527                                            guint                signal_id);
 528 gboolean   gtk_widget_mnemonic_activate   (GtkWidget           *widget,
 529                                            gboolean             group_cycling);
 530 gboolean   gtk_widget_event               (GtkWidget           *widget,
 531                                            GdkEvent            *event);
 532 gint       gtk_widget_send_expose         (GtkWidget           *widget,
 533                                            GdkEvent            *event);
 534 gboolean   gtk_widget_send_focus_change   (GtkWidget           *widget,
 535                                            GdkEvent            *event);
 536
 537 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 538
 539 void       gtk_widget_reparent            (GtkWidget           *widget,
 540                                            GtkWidget           *new_parent);
 541 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 542                                            const GdkRectangle  *area,
 543                                            GdkRectangle        *intersection);
 544 cairo_region_t *gtk_widget_region_intersect       (GtkWidget           *widget,
 545                                            const cairo_region_t     *region);
 546
 547 void    gtk_widget_freeze_child_notify    (GtkWidget           *widget);
 548 void    gtk_widget_child_notify           (GtkWidget           *widget,
 549                                            const gchar         *child_property);
 550 void    gtk_widget_thaw_child_notify      (GtkWidget           *widget);
 551
 552 void       gtk_widget_set_can_focus       (GtkWidget           *widget,
 553                                            gboolean             can_focus);
 554 gboolean   gtk_widget_get_can_focus       (GtkWidget           *widget);
 555 gboolean   gtk_widget_has_focus           (GtkWidget           *widget);
 556 gboolean   gtk_widget_is_focus            (GtkWidget           *widget);
 557 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 558
 559 void       gtk_widget_set_can_default     (GtkWidget           *widget,
 560                                            gboolean             can_default);
 561 gboolean   gtk_widget_get_can_default     (GtkWidget           *widget);
 562 gboolean   gtk_widget_has_default         (GtkWidget           *widget);
 563 void       gtk_widget_grab_default        (GtkWidget           *widget);
 564
 565 void      gtk_widget_set_receives_default (GtkWidget           *widget,
 566                                            gboolean             receives_default);
 567 gboolean  gtk_widget_get_receives_default (GtkWidget           *widget);
 568
 569 gboolean   gtk_widget_has_grab            (GtkWidget           *widget);
 570
 571 gboolean   gtk_widget_device_is_shadowed  (GtkWidget           *widget,
 572                                            GdkDevice           *device);
 573
 574
 575 void                  gtk_widget_set_name               (GtkWidget    *widget,
 576                                                          const gchar  *name);
 577 G_CONST_RETURN gchar* gtk_widget_get_name               (GtkWidget    *widget);
 578
 579 void                  gtk_widget_set_state              (GtkWidget    *widget,
 580                                                          GtkStateType  state);
 581 GtkStateType          gtk_widget_get_state              (GtkWidget    *widget);
 582
 583 void                  gtk_widget_set_state_flags        (GtkWidget     *widget,
 584                                                          GtkStateFlags  flags,
 585                                                          gboolean       clear);
 586 void                  gtk_widget_unset_state_flags      (GtkWidget     *widget,
 587                                                          GtkStateFlags  flags);
 588 GtkStateFlags         gtk_widget_get_state_flags        (GtkWidget     *widget);
 589
 590 void                  gtk_widget_set_sensitive          (GtkWidget    *widget,
 591                                                          gboolean      sensitive);
 592 gboolean              gtk_widget_get_sensitive          (GtkWidget    *widget);
 593 gboolean              gtk_widget_is_sensitive           (GtkWidget    *widget);
 594
 595 void                  gtk_widget_set_visible            (GtkWidget    *widget,
 596                                                          gboolean      visible);
 597 gboolean              gtk_widget_get_visible            (GtkWidget    *widget);
 598
 599 void                  gtk_widget_set_has_window         (GtkWidget    *widget,
 600                                                          gboolean      has_window);
 601 gboolean              gtk_widget_get_has_window         (GtkWidget    *widget);
 602
 603 gboolean              gtk_widget_is_toplevel            (GtkWidget    *widget);
 604 gboolean              gtk_widget_is_drawable            (GtkWidget    *widget);
 605 void                  gtk_widget_set_realized           (GtkWidget    *widget,
 606                                                          gboolean      realized);
 607 gboolean              gtk_widget_get_realized           (GtkWidget    *widget);
 608 void                  gtk_widget_set_mapped             (GtkWidget    *widget,
 609                                                          gboolean      mapped);
 610 gboolean              gtk_widget_get_mapped             (GtkWidget    *widget);
 611
 612 void                  gtk_widget_set_app_paintable      (GtkWidget    *widget,
 613                                                          gboolean      app_paintable);
 614 gboolean              gtk_widget_get_app_paintable      (GtkWidget    *widget);
 615
 616 void                  gtk_widget_set_double_buffered    (GtkWidget    *widget,
 617                                                          gboolean      double_buffered);
 618 gboolean              gtk_widget_get_double_buffered    (GtkWidget    *widget);
 619
 620 void                  gtk_widget_set_redraw_on_allocate (GtkWidget    *widget,
 621                                                          gboolean      redraw_on_allocate);
 622
 623 void                  gtk_widget_set_parent             (GtkWidget    *widget,
 624                                                          GtkWidget    *parent);
 625 GtkWidget           * gtk_widget_get_parent             (GtkWidget    *widget);
 626
 627 void                  gtk_widget_set_parent_window      (GtkWidget    *widget,
 628                                                          GdkWindow    *parent_window);
 629 GdkWindow           * gtk_widget_get_parent_window      (GtkWidget    *widget);
 630
 631 void                  gtk_widget_set_child_visible      (GtkWidget    *widget,
 632                                                          gboolean      is_visible);
 633 gboolean              gtk_widget_get_child_visible      (GtkWidget    *widget);
 634
 635 void                  gtk_widget_set_window             (GtkWidget    *widget,
 636                                                          GdkWindow    *window);
 637 GdkWindow           * gtk_widget_get_window             (GtkWidget    *widget);
 638
 639 int                   gtk_widget_get_allocated_width    (GtkWidget     *widget);
 640 int                   gtk_widget_get_allocated_height   (GtkWidget     *widget);
 641
 642 void                  gtk_widget_get_allocation         (GtkWidget     *widget,
 643                                                          GtkAllocation *allocation);
 644 void                  gtk_widget_set_allocation         (GtkWidget     *widget,
 645                                                          const GtkAllocation *allocation);
 646
 647 void                  gtk_widget_get_requisition        (GtkWidget     *widget,
 648                                                          GtkRequisition *requisition);
 649
 650 gboolean   gtk_widget_child_focus         (GtkWidget           *widget,
 651                                            GtkDirectionType     direction);
 652 gboolean   gtk_widget_keynav_failed       (GtkWidget           *widget,
 653                                            GtkDirectionType     direction);
 654 void       gtk_widget_error_bell          (GtkWidget           *widget);
 655
 656 void       gtk_widget_set_size_request    (GtkWidget           *widget,
 657                                            gint                 width,
 658                                            gint                 height);
 659 void       gtk_widget_get_size_request    (GtkWidget           *widget,
 660                                            gint                *width,
 661                                            gint                *height);
 662 void       gtk_widget_set_events          (GtkWidget           *widget,
 663                                            gint                 events);
 664 void       gtk_widget_add_events          (GtkWidget           *widget,
 665                                            gint                 events);
 666 void       gtk_widget_set_device_events   (GtkWidget           *widget,
 667                                            GdkDevice           *device,
 668                                            GdkEventMask         events);
 669 void       gtk_widget_add_device_events   (GtkWidget           *widget,
 670                                            GdkDevice           *device,
 671                                            GdkEventMask         events);
 672 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 673                                             GdkExtensionMode    mode);
 674
 675 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 676 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 677 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 678                                          GType           widget_type);
 679 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 680 void         gtk_widget_set_visual      (GtkWidget      *widget,
 681                                          GdkVisual      *visual);
 682
 683 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
 684 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
 685 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);
 686 GdkWindow *   gtk_widget_get_root_window (GtkWidget *widget);
 687 GtkSettings*  gtk_widget_get_settings    (GtkWidget *widget);
 688 GtkClipboard *gtk_widget_get_clipboard   (GtkWidget *widget,
 689                                           GdkAtom    selection);
 690
 691
 692 /* Expand flags and related support */
 693 gboolean gtk_widget_get_hexpand          (GtkWidget      *widget);
 694 void     gtk_widget_set_hexpand          (GtkWidget      *widget,
 695                                           gboolean        expand);
 696 gboolean gtk_widget_get_hexpand_set      (GtkWidget      *widget);
 697 void     gtk_widget_set_hexpand_set      (GtkWidget      *widget,
 698                                           gboolean        set);
 699 gboolean gtk_widget_get_vexpand          (GtkWidget      *widget);
 700 void     gtk_widget_set_vexpand          (GtkWidget      *widget,
 701                                           gboolean        expand);
 702 gboolean gtk_widget_get_vexpand_set      (GtkWidget      *widget);
 703 void     gtk_widget_set_vexpand_set      (GtkWidget      *widget,
 704                                           gboolean        set);
 705 void     gtk_widget_queue_compute_expand (GtkWidget      *widget);
 706 gboolean gtk_widget_compute_expand       (GtkWidget      *widget,
 707                                           GtkOrientation  orientation);
 708
 709
 710 /* Multidevice support */
 711 gboolean         gtk_widget_get_support_multidevice (GtkWidget      *widget);
 712 void             gtk_widget_set_support_multidevice (GtkWidget      *widget,
 713                                                      gboolean        support_multidevice);
 714
 715 /* Accessibility support */
 716 AtkObject*       gtk_widget_get_accessible               (GtkWidget          *widget);
 717
 718
 719 /* Margin and alignment */
 720 GtkAlign gtk_widget_get_halign        (GtkWidget *widget);
 721 void     gtk_widget_set_halign        (GtkWidget *widget,
 722                                        GtkAlign   align);
 723 GtkAlign gtk_widget_get_valign        (GtkWidget *widget);
 724 void     gtk_widget_set_valign        (GtkWidget *widget,
 725                                        GtkAlign   align);
 726 gint     gtk_widget_get_margin_left   (GtkWidget *widget);
 727 void     gtk_widget_set_margin_left   (GtkWidget *widget,
 728                                        gint       margin);
 729 gint     gtk_widget_get_margin_right  (GtkWidget *widget);
 730 void     gtk_widget_set_margin_right  (GtkWidget *widget,
 731                                        gint       margin);
 732 gint     gtk_widget_get_margin_top    (GtkWidget *widget);
 733 void     gtk_widget_set_margin_top    (GtkWidget *widget,
 734                                        gint       margin);
 735 gint     gtk_widget_get_margin_bottom (GtkWidget *widget);
 736 void     gtk_widget_set_margin_bottom (GtkWidget *widget,
 737                                        gint       margin);
 738
 739
 740 gint         gtk_widget_get_events      (GtkWidget      *widget);
 741 GdkEventMask gtk_widget_get_device_events (GtkWidget    *widget,
 742                                            GdkDevice    *device);
 743 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 744                                          gint           *x,
 745                                          gint           *y);
 746
 747 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 748                                          GtkWidget      *ancestor);
 749
 750 gboolean     gtk_widget_translate_coordinates (GtkWidget  *src_widget,
 751                                                GtkWidget  *dest_widget,
 752                                                gint        src_x,
 753                                                gint        src_y,
 754                                                gint       *dest_x,
 755                                                gint       *dest_y);
 756
 757 /* Hide widget and return TRUE.
 758  */
 759 gboolean     gtk_widget_hide_on_delete  (GtkWidget      *widget);
 760
 761 /* Functions to override widget styling */
 762 void         gtk_widget_override_color            (GtkWidget     *widget,
 763                                                    GtkStateFlags  state,
 764                                                    const GdkRGBA *color);
 765 void         gtk_widget_override_background_color (GtkWidget     *widget,
 766                                                    GtkStateFlags  state,
 767                                                    const GdkRGBA *color);
 768
 769 void         gtk_widget_override_font (GtkWidget                  *widget,
 770                                        const PangoFontDescription *font_desc);
 771
 772 void         gtk_widget_override_symbolic_color (GtkWidget         *widget,
 773                                                  const gchar       *name,
 774                                                  const GdkRGBA     *color);
 775
 776 /* Widget styles.
 777  */
 778 void        gtk_widget_style_attach       (GtkWidget            *widget);
 779
 780 gboolean    gtk_widget_has_rc_style       (GtkWidget            *widget);
 781 void        gtk_widget_set_style          (GtkWidget            *widget,
 782                                            GtkStyle             *style);
 783 void        gtk_widget_ensure_style       (GtkWidget            *widget);
 784 GtkStyle *  gtk_widget_get_style          (GtkWidget            *widget);
 785
 786 void        gtk_widget_modify_style       (GtkWidget            *widget,
 787                                            GtkRcStyle           *style);
 788 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 789 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 790                                            GtkStateType          state,
 791                                            const GdkColor       *color);
 792 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 793                                            GtkStateType          state,
 794                                            const GdkColor       *color);
 795 void        gtk_widget_modify_text        (GtkWidget            *widget,
 796                                            GtkStateType          state,
 797                                            const GdkColor       *color);
 798 void        gtk_widget_modify_base        (GtkWidget            *widget,
 799                                            GtkStateType          state,
 800                                            const GdkColor       *color);
 801 void        gtk_widget_modify_cursor      (GtkWidget            *widget,
 802                                            const GdkColor       *primary,
 803                                            const GdkColor       *secondary);
 804 void        gtk_widget_modify_font        (GtkWidget            *widget,
 805                                            PangoFontDescription *font_desc);
 806
 807 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 808 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 809 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 810                                                const gchar *text);
 811
 812 GdkPixbuf    *gtk_widget_render_icon          (GtkWidget   *widget,
 813                                                const gchar *stock_id,
 814                                                GtkIconSize  size,
 815                                                const gchar *detail);
 816
 817 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 818  * the returned name is newly allocated.
 819  */
 820 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 821                                          const gchar    *name);
 822 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 823
 824 /* Descend recursively and set rc-style on all widgets without user styles */
 825 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 826
 827 void       gtk_widget_reset_style       (GtkWidget      *widget);
 828
 829 /* Push/pop pairs, to change default values upon a widget's creation.
 830  * This will override the values that got set by the
 831  * gtk_widget_set_default_* () functions.
 832  */
 833 void         gtk_widget_push_composite_child (void);
 834 void         gtk_widget_pop_composite_child  (void);
 835
 836 /* widget style properties
 837  */
 838 void gtk_widget_class_install_style_property        (GtkWidgetClass     *klass,
 839                                                      GParamSpec         *pspec);
 840 void gtk_widget_class_install_style_property_parser (GtkWidgetClass     *klass,
 841                                                      GParamSpec         *pspec,
 842                                                      GtkRcPropertyParser parser);
 843 GParamSpec*  gtk_widget_class_find_style_property   (GtkWidgetClass     *klass,
 844                                                      const gchar        *property_name);
 845 GParamSpec** gtk_widget_class_list_style_properties (GtkWidgetClass     *klass,
 846                                                      guint              *n_properties);
 847 void gtk_widget_style_get_property (GtkWidget        *widget,
 848                                     const gchar    *property_name,
 849                                     GValue           *value);
 850 void gtk_widget_style_get_valist   (GtkWidget        *widget,
 851                                     const gchar    *first_property_name,
 852                                     va_list         var_args);
 853 void gtk_widget_style_get          (GtkWidget        *widget,
 854                                     const gchar    *first_property_name,
 855                                     ...) G_GNUC_NULL_TERMINATED;
 856
 857
 858 /* Set certain default values to be used at widget creation time.
 859  */
 860 GtkStyle*    gtk_widget_get_default_style    (void);
 861
 862 /* Functions for setting directionality for widgets
 863  */
 864
 865 void             gtk_widget_set_direction         (GtkWidget        *widget,
 866                                                    GtkTextDirection  dir);
 867 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 868
 869 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 870 GtkTextDirection gtk_widget_get_default_direction (void);
 871
 872 /* Compositing manager functionality */
 873 gboolean gtk_widget_is_composited (GtkWidget *widget);
 874
 875 /* Counterpart to gdk_window_shape_combine_region.
 876  */
 877 void         gtk_widget_shape_combine_region (GtkWidget *widget,
 878                                               cairo_region_t *region);
 879 void         gtk_widget_input_shape_combine_region (GtkWidget *widget,
 880                                                     cairo_region_t *region);
 881
 882 /* internal function */
 883 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 884
 885 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 886  * return newly alocated strings.
 887  */
 888 void         gtk_widget_path               (GtkWidget *widget,
 889                                             guint     *path_length,
 890                                             gchar    **path,
 891                                             gchar    **path_reversed);
 892 void         gtk_widget_class_path         (GtkWidget *widget,
 893                                             guint     *path_length,
 894                                             gchar    **path,
 895                                             gchar    **path_reversed);
 896
 897 GList* gtk_widget_list_mnemonic_labels  (GtkWidget *widget);
 898 void   gtk_widget_add_mnemonic_label    (GtkWidget *widget,
 899                                          GtkWidget *label);
 900 void   gtk_widget_remove_mnemonic_label (GtkWidget *widget,
 901                                          GtkWidget *label);
 902
 903 void                  gtk_widget_set_tooltip_window    (GtkWidget   *widget,
 904                                                         GtkWindow   *custom_window);
 905 GtkWindow *gtk_widget_get_tooltip_window    (GtkWidget   *widget);
 906 void       gtk_widget_trigger_tooltip_query (GtkWidget   *widget);
 907 void       gtk_widget_set_tooltip_text      (GtkWidget   *widget,
 908                                              const gchar *text);
 909 gchar *    gtk_widget_get_tooltip_text      (GtkWidget   *widget);
 910 void       gtk_widget_set_tooltip_markup    (GtkWidget   *widget,
 911                                              const gchar *markup);
 912 gchar *    gtk_widget_get_tooltip_markup    (GtkWidget   *widget);
 913 void       gtk_widget_set_has_tooltip       (GtkWidget   *widget,
 914                                              gboolean     has_tooltip);
 915 gboolean   gtk_widget_get_has_tooltip       (GtkWidget   *widget);
 916
 917 gboolean   gtk_cairo_should_draw_window     (cairo_t     *cr,
 918                                              GdkWindow   *window);
 919 void       gtk_cairo_transform_to_window    (cairo_t     *cr,
 920                                              GtkWidget   *widget,
 921                                              GdkWindow   *window);
 922
 923 GType           gtk_requisition_get_type (void) G_GNUC_CONST;
 924 GtkRequisition *gtk_requisition_new      (void) G_GNUC_MALLOC;
 925 GtkRequisition *gtk_requisition_copy     (const GtkRequisition *requisition);
 926 void            gtk_requisition_free     (GtkRequisition       *requisition);
 927
 928 GdkEventExpose *  _gtk_cairo_get_event                    (cairo_t      *cr);
 929
 930 void              _gtk_widget_draw_internal               (GtkWidget    *widget,
 931                                                            cairo_t      *cr,
 932                                                            gboolean      clip_to_size);
 933 void              _gtk_widget_set_has_default             (GtkWidget    *widget,
 934                                                            gboolean      has_default);
 935 void              _gtk_widget_set_has_grab                (GtkWidget    *widget,
 936                                                            gboolean      has_grab);
 937 void              _gtk_widget_set_is_toplevel             (GtkWidget    *widget,
 938                                                            gboolean      is_toplevel);
 939
 940 void              _gtk_widget_grab_notify                 (GtkWidget    *widget,
 941                                                            gboolean     was_grabbed);
 942
 943 GtkWidgetAuxInfo *_gtk_widget_get_aux_info                (GtkWidget    *widget,
 944                                                            gboolean      create);
 945 void              _gtk_widget_propagate_hierarchy_changed (GtkWidget    *widget,
 946                                                            GtkWidget    *previous_toplevel);
 947 void              _gtk_widget_propagate_screen_changed    (GtkWidget    *widget,
 948                                                            GdkScreen    *previous_screen);
 949 void              _gtk_widget_propagate_composited_changed (GtkWidget    *widget);
 950
 951 void       _gtk_widget_set_device_window   (GtkWidget      *widget,
 952                                             GdkDevice      *device,
 953                                             GdkWindow      *pointer_window);
 954 GdkWindow *_gtk_widget_get_device_window   (GtkWidget      *widget,
 955                                             GdkDevice      *device);
 956 GList *    _gtk_widget_list_devices        (GtkWidget      *widget);
 957
 958 void       _gtk_widget_synthesize_crossing (GtkWidget      *from,
 959                                             GtkWidget      *to,
 960                                             GdkDevice      *device,
 961                                             GdkCrossingMode mode);
 962
 963 gpointer     _gtk_widget_peek_request_cache (GtkWidget *widget);
 964
 965 void         _gtk_widget_buildable_finish_accelerator (GtkWidget *widget,
 966                                                        GtkWidget *toplevel,
 967                                                        gpointer   user_data);
 968
 969 gboolean     gtk_widget_in_destruction (GtkWidget *widget);
 970
 971 GtkStyleContext * gtk_widget_get_style_context (GtkWidget *widget);
 972
 973 GtkWidgetPath *   gtk_widget_get_path (GtkWidget *widget);
 974
 975
 976 G_END_DECLS
 977
 978 #endif /* __GTK_WIDGET_H__ */