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 #ifndef __GTK_WIDGET_H__
  28 #define __GTK_WIDGET_H__
  29
  30 #include <gdk/gdk.h>
  31 #include <gtk/gtkaccelgroup.h>
  32 #include <gtk/gtkobject.h>
  33 #include <gtk/gtkadjustment.h>
  34 #include <gtk/gtkstyle.h>
  35 #include <gtk/gtksettings.h>
  36 #include <atk/atkobject.h>
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif /* __cplusplus */
  41
  42
  43 /* The flags that are used by GtkWidget on top of the
  44  * flags field of GtkObject.
  45  */
  46 typedef enum
  47 {
  48   GTK_TOPLEVEL         = 1 << 4,
  49   GTK_NO_WINDOW        = 1 << 5,
  50   GTK_REALIZED         = 1 << 6,
  51   GTK_MAPPED           = 1 << 7,
  52   GTK_VISIBLE          = 1 << 8,
  53   GTK_SENSITIVE        = 1 << 9,
  54   GTK_PARENT_SENSITIVE = 1 << 10,
  55   GTK_CAN_FOCUS        = 1 << 11,
  56   GTK_HAS_FOCUS        = 1 << 12,
  57
  58   /* widget is allowed to receive the default via gtk_widget_grab_default
  59    * and will reserve space to draw the default if possible
  60    */
  61   GTK_CAN_DEFAULT      = 1 << 13,
  62
  63   /* the widget currently is receiving the default action and should be drawn
  64    * appropriately if possible
  65    */
  66   GTK_HAS_DEFAULT      = 1 << 14,
  67
  68   GTK_HAS_GRAB         = 1 << 15,
  69   GTK_RC_STYLE         = 1 << 16,
  70   GTK_COMPOSITE_CHILD  = 1 << 17,
  71   GTK_NO_REPARENT      = 1 << 18,
  72   GTK_APP_PAINTABLE    = 1 << 19,
  73
  74   /* the widget when focused will receive the default action and have
  75    * HAS_DEFAULT set even if there is a different widget set as default
  76    */
  77   GTK_RECEIVES_DEFAULT = 1 << 20,
  78
  79   GTK_DOUBLE_BUFFERED  = 1 << 21,
  80   GTK_NO_SHOW_ALL      = 1 << 22
  81 } GtkWidgetFlags;
  82
  83 /* Kinds of widget-specific help */
  84 typedef enum
  85 {
  86   GTK_WIDGET_HELP_TOOLTIP,
  87   GTK_WIDGET_HELP_WHATS_THIS
  88 } GtkWidgetHelpType;
  89
  90 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
  91  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
  92  */
  93 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
  94 #define GTK_WIDGET(widget)                (G_TYPE_CHECK_INSTANCE_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
  95 #define GTK_WIDGET_CLASS(klass)           (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
  96 #define GTK_IS_WIDGET(widget)             (G_TYPE_CHECK_INSTANCE_TYPE ((widget), GTK_TYPE_WIDGET))
  97 #define GTK_IS_WIDGET_CLASS(klass)        (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
  98 #define GTK_WIDGET_GET_CLASS(obj)         (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
  99
 100 /* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
 101  */
 102 #define GTK_WIDGET_TYPE(wid)              (GTK_OBJECT_TYPE (wid))
 103 #define GTK_WIDGET_STATE(wid)             (GTK_WIDGET (wid)->state)
 104 #define GTK_WIDGET_SAVED_STATE(wid)       (GTK_WIDGET (wid)->saved_state)
 105
 106 /* Macros for extracting the widget flags from GtkWidget.
 107  */
 108 #define GTK_WIDGET_FLAGS(wid)             (GTK_OBJECT_FLAGS (wid))
 109 #define GTK_WIDGET_TOPLEVEL(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
 110 #define GTK_WIDGET_NO_WINDOW(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
 111 #define GTK_WIDGET_REALIZED(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
 112 #define GTK_WIDGET_MAPPED(wid)            ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
 113 #define GTK_WIDGET_VISIBLE(wid)           ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
 114 #define GTK_WIDGET_DRAWABLE(wid)          (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))
 115 #define GTK_WIDGET_SENSITIVE(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
 116 #define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
 117 #define GTK_WIDGET_IS_SENSITIVE(wid)      (GTK_WIDGET_SENSITIVE (wid) && \
 118                                            GTK_WIDGET_PARENT_SENSITIVE (wid))
 119 #define GTK_WIDGET_CAN_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
 120 #define GTK_WIDGET_HAS_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
 121 #define GTK_WIDGET_CAN_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
 122 #define GTK_WIDGET_HAS_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
 123 #define GTK_WIDGET_HAS_GRAB(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
 124 #define GTK_WIDGET_RC_STYLE(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
 125 #define GTK_WIDGET_COMPOSITE_CHILD(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
 126 #define GTK_WIDGET_APP_PAINTABLE(wid)     ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)
 127 #define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)
 128 #define GTK_WIDGET_DOUBLE_BUFFERED(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)
 129
 130 /* Macros for setting and clearing widget flags.
 131  */
 132 #define GTK_WIDGET_SET_FLAGS(wid,flag)    G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
 133 #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
 134
 135 #define GTK_TYPE_REQUISITION              (gtk_requisition_get_type ())
 136
 137 /* forward declaration to avoid excessive includes (and concurrent includes)
 138  */
 139 typedef struct _GtkRequisition     GtkRequisition;
 140 typedef         GdkRectangle       GtkAllocation;
 141 typedef struct _GtkSelectionData   GtkSelectionData;
 142 typedef struct _GtkWidgetClass     GtkWidgetClass;
 143 typedef struct _GtkWidgetAuxInfo   GtkWidgetAuxInfo;
 144 typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
 145 typedef struct _GtkClipboard       GtkClipboard;
 146 typedef void     (*GtkCallback)        (GtkWidget        *widget,
 147                                         gpointer          data);
 148
 149 /* A requisition is a desired amount of space which a
 150  *  widget may request.
 151  */
 152 struct _GtkRequisition
 153 {
 154   gint width;
 155   gint height;
 156 };
 157
 158 /* The widget is the base of the tree for displayable objects.
 159  *  (A displayable object is one which takes up some amount
 160  *  of screen real estate). It provides a common base and interface
 161  *  which actual widgets must adhere to.
 162  */
 163 struct _GtkWidget
 164 {
 165   /* The object structure needs to be the first
 166    *  element in the widget structure in order for
 167    *  the object mechanism to work correctly. This
 168    *  allows a GtkWidget pointer to be cast to a
 169    *  GtkObject pointer.
 170    */
 171   GtkObject object;
 172
 173   /* 16 bits of internally used private flags.
 174    * this will be packed into the same 4 byte alignment frame that
 175    * state and saved_state go. we therefore don't waste any new
 176    * space on this.
 177    */
 178   guint16 private_flags;
 179
 180   /* The state of the widget. There are actually only
 181    *  5 widget states (defined in "gtkenums.h").
 182    */
 183   guint8 state;
 184
 185   /* The saved state of the widget. When a widgets state
 186    *  is changed to GTK_STATE_INSENSITIVE via
 187    *  "gtk_widget_set_state" or "gtk_widget_set_sensitive"
 188    *  the old state is kept around in this field. The state
 189    *  will be restored once the widget gets sensitive again.
 190    */
 191   guint8 saved_state;
 192
 193   /* The widgets name. If the widget does not have a name
 194    *  (the name is NULL), then its name (as returned by
 195    *  "gtk_widget_get_name") is its classes name.
 196    * Among other things, the widget name is used to determine
 197    *  the style to use for a widget.
 198    */
 199   gchar *name;
 200
 201   /*< public >*/
 202
 203   /* The style for the widget. The style contains the
 204    *  colors the widget should be drawn in for each state
 205    *  along with graphics contexts used to draw with and
 206    *  the font to use for text.
 207    */
 208   GtkStyle *style;
 209
 210   /* The widgets desired size.
 211    */
 212   GtkRequisition requisition;
 213
 214   /* The widgets allocated size.
 215    */
 216   GtkAllocation allocation;
 217
 218   /* The widgets window or its parent window if it does
 219    *  not have a window. (Which will be indicated by the
 220    *  GTK_NO_WINDOW flag being set).
 221    */
 222   GdkWindow *window;
 223
 224   /* The widgets parent.
 225    */
 226   GtkWidget *parent;
 227 };
 228
 229 struct _GtkWidgetClass
 230 {
 231   /* The object class structure needs to be the first
 232    *  element in the widget class structure in order for
 233    *  the class mechanism to work correctly. This allows a
 234    *  GtkWidgetClass pointer to be cast to a GtkObjectClass
 235    *  pointer.
 236    */
 237   GtkObjectClass parent_class;
 238
 239   /*< public >*/
 240
 241   guint activate_signal;
 242
 243   guint set_scroll_adjustments_signal;
 244
 245   /*< private >*/
 246
 247   /* seldomly overidden */
 248   void (*dispatch_child_properties_changed) (GtkWidget   *widget,
 249                                              guint        n_pspecs,
 250                                              GParamSpec **pspecs);
 251
 252   /* basics */
 253   void (* show)                (GtkWidget        *widget);
 254   void (* show_all)            (GtkWidget        *widget);
 255   void (* hide)                (GtkWidget        *widget);
 256   void (* hide_all)            (GtkWidget        *widget);
 257   void (* map)                 (GtkWidget        *widget);
 258   void (* unmap)               (GtkWidget        *widget);
 259   void (* realize)             (GtkWidget        *widget);
 260   void (* unrealize)           (GtkWidget        *widget);
 261   void (* size_request)        (GtkWidget        *widget,
 262                                 GtkRequisition   *requisition);
 263   void (* size_allocate)       (GtkWidget        *widget,
 264                                 GtkAllocation    *allocation);
 265   void (* state_changed)       (GtkWidget        *widget,
 266                                 GtkStateType      previous_state);
 267   void (* parent_set)          (GtkWidget        *widget,
 268                                 GtkWidget        *previous_parent);
 269   void (* hierarchy_changed)   (GtkWidget        *widget,
 270                                 GtkWidget        *previous_toplevel);
 271   void (* style_set)           (GtkWidget        *widget,
 272                                 GtkStyle         *previous_style);
 273   void (* direction_changed)   (GtkWidget        *widget,
 274                                 GtkTextDirection  previous_direction);
 275   void (* grab_notify)         (GtkWidget        *widget,
 276                                 gboolean          was_grabbed);
 277   void (* child_notify)        (GtkWidget        *widget,
 278                                 GParamSpec       *pspec);
 279
 280   /* Mnemonics */
 281   gboolean (* mnemonic_activate) (GtkWidget    *widget,
 282                                   gboolean      group_cycling);
 283
 284   /* explicit focus */
 285   void     (* grab_focus)      (GtkWidget        *widget);
 286   gboolean (* focus)           (GtkWidget        *widget,
 287                                 GtkDirectionType  direction);
 288
 289   /* events */
 290   gboolean (* event)                    (GtkWidget           *widget,
 291                                          GdkEvent            *event);
 292   gboolean (* button_press_event)       (GtkWidget           *widget,
 293                                          GdkEventButton      *event);
 294   gboolean (* button_release_event)     (GtkWidget           *widget,
 295                                          GdkEventButton      *event);
 296   gboolean (* scroll_event)             (GtkWidget           *widget,
 297                                          GdkEventScroll      *event);
 298   gboolean (* motion_notify_event)      (GtkWidget           *widget,
 299                                          GdkEventMotion      *event);
 300   gboolean (* delete_event)             (GtkWidget           *widget,
 301                                          GdkEventAny         *event);
 302   gboolean (* destroy_event)            (GtkWidget           *widget,
 303                                          GdkEventAny         *event);
 304   gboolean (* expose_event)             (GtkWidget           *widget,
 305                                          GdkEventExpose      *event);
 306   gboolean (* key_press_event)          (GtkWidget           *widget,
 307                                          GdkEventKey         *event);
 308   gboolean (* key_release_event)        (GtkWidget           *widget,
 309                                          GdkEventKey         *event);
 310   gboolean (* enter_notify_event)       (GtkWidget           *widget,
 311                                          GdkEventCrossing    *event);
 312   gboolean (* leave_notify_event)       (GtkWidget           *widget,
 313                                          GdkEventCrossing    *event);
 314   gboolean (* configure_event)          (GtkWidget           *widget,
 315                                          GdkEventConfigure   *event);
 316   gboolean (* focus_in_event)           (GtkWidget           *widget,
 317                                          GdkEventFocus       *event);
 318   gboolean (* focus_out_event)          (GtkWidget           *widget,
 319                                          GdkEventFocus       *event);
 320   gboolean (* map_event)                (GtkWidget           *widget,
 321                                          GdkEventAny         *event);
 322   gboolean (* unmap_event)              (GtkWidget           *widget,
 323                                          GdkEventAny         *event);
 324   gboolean (* property_notify_event)    (GtkWidget           *widget,
 325                                          GdkEventProperty    *event);
 326   gboolean (* selection_clear_event)    (GtkWidget           *widget,
 327                                          GdkEventSelection   *event);
 328   gboolean (* selection_request_event)  (GtkWidget           *widget,
 329                                          GdkEventSelection   *event);
 330   gboolean (* selection_notify_event)   (GtkWidget           *widget,
 331                                          GdkEventSelection   *event);
 332   gboolean (* proximity_in_event)       (GtkWidget           *widget,
 333                                          GdkEventProximity   *event);
 334   gboolean (* proximity_out_event)      (GtkWidget           *widget,
 335                                          GdkEventProximity   *event);
 336   gboolean (* visibility_notify_event)  (GtkWidget           *widget,
 337                                          GdkEventVisibility  *event);
 338   gboolean (* client_event)             (GtkWidget           *widget,
 339                                          GdkEventClient      *event);
 340   gboolean (* no_expose_event)          (GtkWidget           *widget,
 341                                          GdkEventAny         *event);
 342   gboolean (* window_state_event)       (GtkWidget           *widget,
 343                                          GdkEventWindowState *event);
 344
 345   /* selection */
 346   void (* selection_get)           (GtkWidget          *widget,
 347                                     GtkSelectionData   *selection_data,
 348                                     guint               info,
 349                                     guint               time_);
 350   void (* selection_received)      (GtkWidget          *widget,
 351                                     GtkSelectionData   *selection_data,
 352                                     guint               time_);
 353
 354   /* Source side drag signals */
 355   void (* drag_begin)              (GtkWidget          *widget,
 356                                     GdkDragContext     *context);
 357   void (* drag_end)                (GtkWidget          *widget,
 358                                     GdkDragContext     *context);
 359   void (* drag_data_get)           (GtkWidget          *widget,
 360                                     GdkDragContext     *context,
 361                                     GtkSelectionData   *selection_data,
 362                                     guint               info,
 363                                     guint               time_);
 364   void (* drag_data_delete)        (GtkWidget          *widget,
 365                                     GdkDragContext     *context);
 366
 367   /* Target side drag signals */
 368   void (* drag_leave)              (GtkWidget          *widget,
 369                                     GdkDragContext     *context,
 370                                     guint               time_);
 371   gboolean (* drag_motion)         (GtkWidget          *widget,
 372                                     GdkDragContext     *context,
 373                                     gint                x,
 374                                     gint                y,
 375                                     guint               time_);
 376   gboolean (* drag_drop)           (GtkWidget          *widget,
 377                                     GdkDragContext     *context,
 378                                     gint                x,
 379                                     gint                y,
 380                                     guint               time_);
 381   void (* drag_data_received)      (GtkWidget          *widget,
 382                                     GdkDragContext     *context,
 383                                     gint                x,
 384                                     gint                y,
 385                                     GtkSelectionData   *selection_data,
 386                                     guint               info,
 387                                     guint               time_);
 388
 389   /* Signals used only for keybindings */
 390   gboolean (* popup_menu)          (GtkWidget          *widget);
 391
 392   /* If a widget has multiple tooltips/whatsthis, it should show the
 393    * one for the current focus location, or if that doesn't make
 394    * sense, should cycle through them showing each tip alongside
 395    * whatever piece of the widget it applies to.
 396    */
 397   gboolean (* show_help)           (GtkWidget          *widget,
 398                                     GtkWidgetHelpType   help_type);
 399
 400   /* accessibility support
 401    */
 402   AtkObject*   (* get_accessible)  (GtkWidget          *widget);
 403
 404   void (* screen_changed) (GtkWidget *widget,
 405                            GdkScreen *previous_screen);
 406   /* Padding for future expansion */
 407   void (*_gtk_reserved1) (void);
 408   void (*_gtk_reserved2) (void);
 409   void (*_gtk_reserved3) (void);
 410   void (*_gtk_reserved4) (void);
 411   void (*_gtk_reserved5) (void);
 412   void (*_gtk_reserved6) (void);
 413   void (*_gtk_reserved7) (void);
 414 };
 415
 416 struct _GtkWidgetAuxInfo
 417 {
 418   gint x;
 419   gint y;
 420   gint width;
 421   gint height;
 422   guint x_set : 1;
 423   guint y_set : 1;
 424 };
 425
 426 struct _GtkWidgetShapeInfo
 427 {
 428   gint16     offset_x;
 429   gint16     offset_y;
 430   GdkBitmap *shape_mask;
 431 };
 432
 433 GType      gtk_widget_get_type            (void) G_GNUC_CONST;
 434 GtkWidget* gtk_widget_new                 (GType                type,
 435                                            const gchar         *first_property_name,
 436                                            ...);
 437 GtkWidget* gtk_widget_ref                 (GtkWidget           *widget);
 438 void       gtk_widget_unref               (GtkWidget           *widget);
 439 void       gtk_widget_destroy             (GtkWidget           *widget);
 440 void       gtk_widget_destroyed           (GtkWidget           *widget,
 441                                            GtkWidget          **widget_pointer);
 442 #ifndef GTK_DISABLE_DEPRECATED
 443 void       gtk_widget_set                 (GtkWidget           *widget,
 444                                            const gchar         *first_property_name,
 445                                            ...);
 446 #endif /* GTK_DISABLE_DEPRECATED */
 447 void       gtk_widget_unparent            (GtkWidget           *widget);
 448 void       gtk_widget_show                (GtkWidget           *widget);
 449 void       gtk_widget_show_now            (GtkWidget           *widget);
 450 void       gtk_widget_hide                (GtkWidget           *widget);
 451 void       gtk_widget_show_all            (GtkWidget           *widget);
 452 void       gtk_widget_hide_all            (GtkWidget           *widget);
 453 void       gtk_widget_set_no_show_all     (GtkWidget           *widget,
 454                                            gboolean             no_show_all);
 455 gboolean   gtk_widget_get_no_show_all     (GtkWidget           *widget);
 456 void       gtk_widget_map                 (GtkWidget           *widget);
 457 void       gtk_widget_unmap               (GtkWidget           *widget);
 458 void       gtk_widget_realize             (GtkWidget           *widget);
 459 void       gtk_widget_unrealize           (GtkWidget           *widget);
 460
 461 /* Queuing draws */
 462 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 463 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 464                                            gint                 x,
 465                                            gint                 y,
 466                                            gint                 width,
 467                                            gint                 height);
 468 #ifndef GTK_DISABLE_DEPRECATED
 469 void       gtk_widget_queue_clear         (GtkWidget           *widget);
 470 void       gtk_widget_queue_clear_area    (GtkWidget           *widget,
 471                                            gint                 x,
 472                                            gint                 y,
 473                                            gint                 width,
 474                                            gint                 height);
 475 #endif /* GTK_DISABLE_DEPRECATED */
 476
 477
 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_draw                (GtkWidget           *widget,
 482                                            GdkRectangle        *area);
 483 #endif /* GTK_DISABLE_DEPRECATED */
 484 void       gtk_widget_size_request        (GtkWidget           *widget,
 485                                            GtkRequisition      *requisition);
 486 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 487                                            GtkAllocation       *allocation);
 488 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 489                                              GtkRequisition    *requisition);
 490 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 491                                            const gchar         *accel_signal,
 492                                            GtkAccelGroup       *accel_group,
 493                                            guint                accel_key,
 494                                            GdkModifierType      accel_mods,
 495                                            GtkAccelFlags        accel_flags);
 496 gboolean   gtk_widget_remove_accelerator  (GtkWidget           *widget,
 497                                            GtkAccelGroup       *accel_group,
 498                                            guint                accel_key,
 499                                            GdkModifierType      accel_mods);
 500 void       gtk_widget_set_accel_path      (GtkWidget           *widget,
 501                                            const gchar         *accel_path,
 502                                            GtkAccelGroup       *accel_group);
 503 const gchar* _gtk_widget_get_accel_path   (GtkWidget           *widget,
 504                                            gboolean            *locked);
 505 GList*     gtk_widget_list_accel_closures (GtkWidget           *widget);
 506 gboolean   gtk_widget_mnemonic_activate   (GtkWidget           *widget,
 507                                            gboolean             group_cycling);
 508 gboolean   gtk_widget_event               (GtkWidget           *widget,
 509                                            GdkEvent            *event);
 510 gint       gtk_widget_send_expose         (GtkWidget           *widget,
 511                                            GdkEvent            *event);
 512
 513 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 514 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 515                                               GtkAdjustment    *hadjustment,
 516                                               GtkAdjustment    *vadjustment);
 517
 518 void       gtk_widget_reparent            (GtkWidget           *widget,
 519                                            GtkWidget           *new_parent);
 520 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 521                                            GdkRectangle        *area,
 522                                            GdkRectangle        *intersection);
 523 GdkRegion *gtk_widget_region_intersect    (GtkWidget           *widget,
 524                                            GdkRegion           *region);
 525
 526 void    gtk_widget_freeze_child_notify    (GtkWidget           *widget);
 527 void    gtk_widget_child_notify           (GtkWidget           *widget,
 528                                            const gchar         *child_property);
 529 void    gtk_widget_thaw_child_notify      (GtkWidget           *widget);
 530
 531 gboolean   gtk_widget_is_focus            (GtkWidget           *widget);
 532 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 533 void       gtk_widget_grab_default        (GtkWidget           *widget);
 534
 535 void                  gtk_widget_set_name               (GtkWidget    *widget,
 536                                                          const gchar  *name);
 537 G_CONST_RETURN gchar* gtk_widget_get_name               (GtkWidget    *widget);
 538 void                  gtk_widget_set_state              (GtkWidget    *widget,
 539                                                          GtkStateType  state);
 540 void                  gtk_widget_set_sensitive          (GtkWidget    *widget,
 541                                                          gboolean      sensitive);
 542 void                  gtk_widget_set_app_paintable      (GtkWidget    *widget,
 543                                                          gboolean      app_paintable);
 544 void                  gtk_widget_set_double_buffered    (GtkWidget    *widget,
 545                                                          gboolean      double_buffered);
 546 void                  gtk_widget_set_redraw_on_allocate (GtkWidget    *widget,
 547                                                          gboolean      redraw_on_allocate);
 548 void                  gtk_widget_set_parent             (GtkWidget    *widget,
 549                                                          GtkWidget    *parent);
 550 void                  gtk_widget_set_parent_window      (GtkWidget    *widget,
 551                                                          GdkWindow    *parent_window);
 552 void                  gtk_widget_set_child_visible      (GtkWidget    *widget,
 553                                                          gboolean      is_visible);
 554 gboolean              gtk_widget_get_child_visible      (GtkWidget    *widget);
 555
 556 GtkWidget *gtk_widget_get_parent          (GtkWidget           *widget);
 557 GdkWindow *gtk_widget_get_parent_window   (GtkWidget           *widget);
 558
 559 gboolean   gtk_widget_child_focus         (GtkWidget           *widget,
 560                                            GtkDirectionType     direction);
 561
 562 void       gtk_widget_set_size_request    (GtkWidget           *widget,
 563                                            gint                 width,
 564                                            gint                 height);
 565 void       gtk_widget_get_size_request    (GtkWidget           *widget,
 566                                            gint                *width,
 567                                            gint                *height);
 568 #ifndef GTK_DISABLE_DEPRECATED
 569 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 570                                            gint                 x,
 571                                            gint                 y);
 572 void       gtk_widget_set_usize           (GtkWidget           *widget,
 573                                            gint                 width,
 574                                            gint                 height);
 575 #endif
 576
 577 void       gtk_widget_set_events          (GtkWidget           *widget,
 578                                            gint                 events);
 579 void       gtk_widget_add_events          (GtkWidget           *widget,
 580                                            gint                 events);
 581 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 582                                             GdkExtensionMode    mode);
 583
 584 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 585 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 586 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 587                                          GType           widget_type);
 588 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
 589 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 590
 591 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
 592 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
 593 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);
 594 GdkWindow *   gtk_widget_get_root_window (GtkWidget *widget);
 595 GtkSettings*  gtk_widget_get_settings    (GtkWidget *widget);
 596 GtkClipboard *gtk_widget_get_clipboard   (GtkWidget *widget,
 597                                           GdkAtom    selection);
 598
 599 #ifndef GTK_DISABLE_DEPRECATED
 600 #define gtk_widget_set_visual(widget,visual)  ((void) 0)
 601 #define gtk_widget_push_visual(visual)        ((void) 0)
 602 #define gtk_widget_pop_visual()               ((void) 0)
 603 #define gtk_widget_set_default_visual(visual) ((void) 0)
 604 #endif /* GTK_DISABLE_DEPRECATED */
 605
 606 /* Accessibility support */
 607 AtkObject*       gtk_widget_get_accessible               (GtkWidget          *widget);
 608
 609 /* The following functions must not be called on an already
 610  * realized widget. Because it is possible that somebody
 611  * can call get_colormap() or get_visual() and save the
 612  * result, these functions are probably only safe to
 613  * call in a widget's init() function.
 614  */
 615 void         gtk_widget_set_colormap    (GtkWidget      *widget,
 616                                          GdkColormap    *colormap);
 617
 618 gint         gtk_widget_get_events      (GtkWidget      *widget);
 619 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 620                                          gint           *x,
 621                                          gint           *y);
 622
 623 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 624                                          GtkWidget      *ancestor);
 625
 626 gboolean     gtk_widget_translate_coordinates (GtkWidget  *src_widget,
 627                                                GtkWidget  *dest_widget,
 628                                                gint        src_x,
 629                                                gint        src_y,
 630                                                gint       *dest_x,
 631                                                gint       *dest_y);
 632
 633 /* Hide widget and return TRUE.
 634  */
 635 gboolean     gtk_widget_hide_on_delete  (GtkWidget      *widget);
 636
 637 /* Widget styles.
 638  */
 639 void       gtk_widget_set_style         (GtkWidget      *widget,
 640                                          GtkStyle       *style);
 641 void       gtk_widget_ensure_style      (GtkWidget      *widget);
 642 GtkStyle*  gtk_widget_get_style         (GtkWidget      *widget);
 643
 644 void        gtk_widget_modify_style       (GtkWidget            *widget,
 645                                            GtkRcStyle           *style);
 646 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 647 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 648                                            GtkStateType          state,
 649                                            GdkColor             *color);
 650 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 651                                            GtkStateType          state,
 652                                            GdkColor             *color);
 653 void        gtk_widget_modify_text        (GtkWidget            *widget,
 654                                            GtkStateType          state,
 655                                            GdkColor             *color);
 656 void        gtk_widget_modify_base        (GtkWidget            *widget,
 657                                            GtkStateType          state,
 658                                            GdkColor             *color);
 659 void        gtk_widget_modify_font        (GtkWidget            *widget,
 660                                            PangoFontDescription *font_desc);
 661
 662 #ifndef GTK_DISABLE_DEPRECATED
 663 #define gtk_widget_set_rc_style(widget)          (gtk_widget_set_style (widget, NULL))
 664 #define gtk_widget_restore_default_style(widget) (gtk_widget_set_style (widget, NULL))
 665 #endif
 666
 667 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 668 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 669 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 670                                                const gchar *text);
 671
 672 GdkPixbuf    *gtk_widget_render_icon          (GtkWidget   *widget,
 673                                                const gchar *stock_id,
 674                                                GtkIconSize  size,
 675                                                const gchar *detail);
 676
 677 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 678  * the returned name is newly allocated.
 679  */
 680 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 681                                          const gchar    *name);
 682 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 683
 684 /* Descend recursively and set rc-style on all widgets without user styles */
 685 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 686
 687 /* Push/pop pairs, to change default values upon a widget's creation.
 688  * This will override the values that got set by the
 689  * gtk_widget_set_default_* () functions.
 690  */
 691 void         gtk_widget_push_colormap        (GdkColormap *cmap);
 692 void         gtk_widget_push_composite_child (void);
 693 void         gtk_widget_pop_composite_child  (void);
 694 void         gtk_widget_pop_colormap         (void);
 695
 696 /* widget style properties
 697  */
 698 void gtk_widget_class_install_style_property        (GtkWidgetClass     *klass,
 699                                                      GParamSpec         *pspec);
 700 void gtk_widget_class_install_style_property_parser (GtkWidgetClass     *klass,
 701                                                      GParamSpec         *pspec,
 702                                                      GtkRcPropertyParser parser);
 703 GParamSpec*  gtk_widget_class_find_style_property   (GtkWidgetClass     *klass,
 704                                                      const gchar        *property_name);
 705 GParamSpec** gtk_widget_class_list_style_properties (GtkWidgetClass     *klass,
 706                                                      guint              *n_properties);
 707 void gtk_widget_style_get_property (GtkWidget        *widget,
 708                                     const gchar    *property_name,
 709                                     GValue           *value);
 710 void gtk_widget_style_get_valist   (GtkWidget        *widget,
 711                                     const gchar    *first_property_name,
 712                                     va_list         var_args);
 713 void gtk_widget_style_get          (GtkWidget        *widget,
 714                                     const gchar    *first_property_name,
 715                                     ...);
 716
 717
 718 /* Set certain default values to be used at widget creation time.
 719  */
 720 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
 721 GtkStyle*    gtk_widget_get_default_style    (void);
 722 #ifndef GDK_MULTIHEAD_SAFE
 723 GdkColormap* gtk_widget_get_default_colormap (void);
 724 GdkVisual*   gtk_widget_get_default_visual   (void);
 725 #endif
 726
 727 /* Functions for setting directionality for widgets
 728  */
 729
 730 void             gtk_widget_set_direction         (GtkWidget        *widget,
 731                                                    GtkTextDirection  dir);
 732 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 733
 734 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 735 GtkTextDirection gtk_widget_get_default_direction (void);
 736
 737 /* Counterpart to gdk_window_shape_combine_mask.
 738  */
 739 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
 740                                             GdkBitmap *shape_mask,
 741                                             gint       offset_x,
 742                                             gint       offset_y);
 743
 744 /* internal function */
 745 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 746
 747 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 748  * return newly alocated strings.
 749  */
 750 void         gtk_widget_path               (GtkWidget *widget,
 751                                             guint     *path_length,
 752                                             gchar    **path,
 753                                             gchar    **path_reversed);
 754 void         gtk_widget_class_path         (GtkWidget *widget,
 755                                             guint     *path_length,
 756                                             gchar    **path,
 757                                             gchar    **path_reversed);
 758
 759 GType           gtk_requisition_get_type (void);
 760 GtkRequisition *gtk_requisition_copy     (const GtkRequisition *requisition);
 761 void            gtk_requisition_free     (GtkRequisition       *requisition);
 762
 763 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
 764 #  define gtk_widget_ref gtk_object_ref
 765 #  define gtk_widget_unref gtk_object_unref
 766 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
 767
 768 GtkWidgetAuxInfo *_gtk_widget_get_aux_info                (GtkWidget    *widget,
 769                                                            gboolean      create);
 770 void              _gtk_widget_propagate_hierarchy_changed (GtkWidget    *widget,
 771                                                            GtkWidget    *previous_toplevel);
 772 void              _gtk_widget_propagate_screen_changed    (GtkWidget    *widget,
 773                                                            GdkScreen    *previous_screen);
 774
 775 GdkColormap* _gtk_widget_peek_colormap (void);
 776
 777
 778 #ifdef __cplusplus
 779 }
 780 #endif /* __cplusplus */
 781
 782
 783 #endif /* __GTK_WIDGET_H__ */