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   gboolean     (*can_activate_accel) (GtkWidget *widget,
 407                                       guint      signal_id);
 408
 409   /* Padding for future expansion */
 410   void (*_gtk_reserved2) (void);
 411   void (*_gtk_reserved3) (void);
 412   void (*_gtk_reserved4) (void);
 413   void (*_gtk_reserved5) (void);
 414   void (*_gtk_reserved6) (void);
 415   void (*_gtk_reserved7) (void);
 416 };
 417
 418 struct _GtkWidgetAuxInfo
 419 {
 420   gint x;
 421   gint y;
 422   gint width;
 423   gint height;
 424   guint x_set : 1;
 425   guint y_set : 1;
 426 };
 427
 428 struct _GtkWidgetShapeInfo
 429 {
 430   gint16     offset_x;
 431   gint16     offset_y;
 432   GdkBitmap *shape_mask;
 433 };
 434
 435 GType      gtk_widget_get_type            (void) G_GNUC_CONST;
 436 GtkWidget* gtk_widget_new                 (GType                type,
 437                                            const gchar         *first_property_name,
 438                                            ...);
 439 GtkWidget* gtk_widget_ref                 (GtkWidget           *widget);
 440 void       gtk_widget_unref               (GtkWidget           *widget);
 441 void       gtk_widget_destroy             (GtkWidget           *widget);
 442 void       gtk_widget_destroyed           (GtkWidget           *widget,
 443                                            GtkWidget          **widget_pointer);
 444 #ifndef GTK_DISABLE_DEPRECATED
 445 void       gtk_widget_set                 (GtkWidget           *widget,
 446                                            const gchar         *first_property_name,
 447                                            ...);
 448 #endif /* GTK_DISABLE_DEPRECATED */
 449 void       gtk_widget_unparent            (GtkWidget           *widget);
 450 void       gtk_widget_show                (GtkWidget           *widget);
 451 void       gtk_widget_show_now            (GtkWidget           *widget);
 452 void       gtk_widget_hide                (GtkWidget           *widget);
 453 void       gtk_widget_show_all            (GtkWidget           *widget);
 454 void       gtk_widget_hide_all            (GtkWidget           *widget);
 455 void       gtk_widget_set_no_show_all     (GtkWidget           *widget,
 456                                            gboolean             no_show_all);
 457 gboolean   gtk_widget_get_no_show_all     (GtkWidget           *widget);
 458 void       gtk_widget_map                 (GtkWidget           *widget);
 459 void       gtk_widget_unmap               (GtkWidget           *widget);
 460 void       gtk_widget_realize             (GtkWidget           *widget);
 461 void       gtk_widget_unrealize           (GtkWidget           *widget);
 462
 463 /* Queuing draws */
 464 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 465 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 466                                            gint                 x,
 467                                            gint                 y,
 468                                            gint                 width,
 469                                            gint                 height);
 470 #ifndef GTK_DISABLE_DEPRECATED
 471 void       gtk_widget_queue_clear         (GtkWidget           *widget);
 472 void       gtk_widget_queue_clear_area    (GtkWidget           *widget,
 473                                            gint                 x,
 474                                            gint                 y,
 475                                            gint                 width,
 476                                            gint                 height);
 477 #endif /* GTK_DISABLE_DEPRECATED */
 478
 479
 480 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 481 void       gtk_widget_queue_resize_no_redraw (GtkWidget *widget);
 482 #ifndef GTK_DISABLE_DEPRECATED
 483 void       gtk_widget_draw                (GtkWidget           *widget,
 484                                            GdkRectangle        *area);
 485 #endif /* GTK_DISABLE_DEPRECATED */
 486 void       gtk_widget_size_request        (GtkWidget           *widget,
 487                                            GtkRequisition      *requisition);
 488 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 489                                            GtkAllocation       *allocation);
 490 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 491                                              GtkRequisition    *requisition);
 492 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 493                                            const gchar         *accel_signal,
 494                                            GtkAccelGroup       *accel_group,
 495                                            guint                accel_key,
 496                                            GdkModifierType      accel_mods,
 497                                            GtkAccelFlags        accel_flags);
 498 gboolean   gtk_widget_remove_accelerator  (GtkWidget           *widget,
 499                                            GtkAccelGroup       *accel_group,
 500                                            guint                accel_key,
 501                                            GdkModifierType      accel_mods);
 502 void       gtk_widget_set_accel_path      (GtkWidget           *widget,
 503                                            const gchar         *accel_path,
 504                                            GtkAccelGroup       *accel_group);
 505 const gchar* _gtk_widget_get_accel_path   (GtkWidget           *widget,
 506                                            gboolean            *locked);
 507 GList*     gtk_widget_list_accel_closures (GtkWidget           *widget);
 508 gboolean   gtk_widget_can_activate_accel  (GtkWidget           *widget,
 509                                            guint                signal_id);
 510 gboolean   gtk_widget_mnemonic_activate   (GtkWidget           *widget,
 511                                            gboolean             group_cycling);
 512 gboolean   gtk_widget_event               (GtkWidget           *widget,
 513                                            GdkEvent            *event);
 514 gint       gtk_widget_send_expose         (GtkWidget           *widget,
 515                                            GdkEvent            *event);
 516
 517 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 518 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 519                                               GtkAdjustment    *hadjustment,
 520                                               GtkAdjustment    *vadjustment);
 521
 522 void       gtk_widget_reparent            (GtkWidget           *widget,
 523                                            GtkWidget           *new_parent);
 524 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 525                                            GdkRectangle        *area,
 526                                            GdkRectangle        *intersection);
 527 GdkRegion *gtk_widget_region_intersect    (GtkWidget           *widget,
 528                                            GdkRegion           *region);
 529
 530 void    gtk_widget_freeze_child_notify    (GtkWidget           *widget);
 531 void    gtk_widget_child_notify           (GtkWidget           *widget,
 532                                            const gchar         *child_property);
 533 void    gtk_widget_thaw_child_notify      (GtkWidget           *widget);
 534
 535 gboolean   gtk_widget_is_focus            (GtkWidget           *widget);
 536 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 537 void       gtk_widget_grab_default        (GtkWidget           *widget);
 538
 539 void                  gtk_widget_set_name               (GtkWidget    *widget,
 540                                                          const gchar  *name);
 541 G_CONST_RETURN gchar* gtk_widget_get_name               (GtkWidget    *widget);
 542 void                  gtk_widget_set_state              (GtkWidget    *widget,
 543                                                          GtkStateType  state);
 544 void                  gtk_widget_set_sensitive          (GtkWidget    *widget,
 545                                                          gboolean      sensitive);
 546 void                  gtk_widget_set_app_paintable      (GtkWidget    *widget,
 547                                                          gboolean      app_paintable);
 548 void                  gtk_widget_set_double_buffered    (GtkWidget    *widget,
 549                                                          gboolean      double_buffered);
 550 void                  gtk_widget_set_redraw_on_allocate (GtkWidget    *widget,
 551                                                          gboolean      redraw_on_allocate);
 552 void                  gtk_widget_set_parent             (GtkWidget    *widget,
 553                                                          GtkWidget    *parent);
 554 void                  gtk_widget_set_parent_window      (GtkWidget    *widget,
 555                                                          GdkWindow    *parent_window);
 556 void                  gtk_widget_set_child_visible      (GtkWidget    *widget,
 557                                                          gboolean      is_visible);
 558 gboolean              gtk_widget_get_child_visible      (GtkWidget    *widget);
 559
 560 GtkWidget *gtk_widget_get_parent          (GtkWidget           *widget);
 561 GdkWindow *gtk_widget_get_parent_window   (GtkWidget           *widget);
 562
 563 gboolean   gtk_widget_child_focus         (GtkWidget           *widget,
 564                                            GtkDirectionType     direction);
 565
 566 void       gtk_widget_set_size_request    (GtkWidget           *widget,
 567                                            gint                 width,
 568                                            gint                 height);
 569 void       gtk_widget_get_size_request    (GtkWidget           *widget,
 570                                            gint                *width,
 571                                            gint                *height);
 572 #ifndef GTK_DISABLE_DEPRECATED
 573 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 574                                            gint                 x,
 575                                            gint                 y);
 576 void       gtk_widget_set_usize           (GtkWidget           *widget,
 577                                            gint                 width,
 578                                            gint                 height);
 579 #endif
 580
 581 void       gtk_widget_set_events          (GtkWidget           *widget,
 582                                            gint                 events);
 583 void       gtk_widget_add_events          (GtkWidget           *widget,
 584                                            gint                 events);
 585 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 586                                             GdkExtensionMode    mode);
 587
 588 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 589 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 590 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 591                                          GType           widget_type);
 592 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
 593 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 594
 595 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
 596 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
 597 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);
 598 GdkWindow *   gtk_widget_get_root_window (GtkWidget *widget);
 599 GtkSettings*  gtk_widget_get_settings    (GtkWidget *widget);
 600 GtkClipboard *gtk_widget_get_clipboard   (GtkWidget *widget,
 601                                           GdkAtom    selection);
 602
 603 #ifndef GTK_DISABLE_DEPRECATED
 604 #define gtk_widget_set_visual(widget,visual)  ((void) 0)
 605 #define gtk_widget_push_visual(visual)        ((void) 0)
 606 #define gtk_widget_pop_visual()               ((void) 0)
 607 #define gtk_widget_set_default_visual(visual) ((void) 0)
 608 #endif /* GTK_DISABLE_DEPRECATED */
 609
 610 /* Accessibility support */
 611 AtkObject*       gtk_widget_get_accessible               (GtkWidget          *widget);
 612
 613 /* The following functions must not be called on an already
 614  * realized widget. Because it is possible that somebody
 615  * can call get_colormap() or get_visual() and save the
 616  * result, these functions are probably only safe to
 617  * call in a widget's init() function.
 618  */
 619 void         gtk_widget_set_colormap    (GtkWidget      *widget,
 620                                          GdkColormap    *colormap);
 621
 622 gint         gtk_widget_get_events      (GtkWidget      *widget);
 623 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 624                                          gint           *x,
 625                                          gint           *y);
 626
 627 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 628                                          GtkWidget      *ancestor);
 629
 630 gboolean     gtk_widget_translate_coordinates (GtkWidget  *src_widget,
 631                                                GtkWidget  *dest_widget,
 632                                                gint        src_x,
 633                                                gint        src_y,
 634                                                gint       *dest_x,
 635                                                gint       *dest_y);
 636
 637 /* Hide widget and return TRUE.
 638  */
 639 gboolean     gtk_widget_hide_on_delete  (GtkWidget      *widget);
 640
 641 /* Widget styles.
 642  */
 643 void       gtk_widget_set_style         (GtkWidget      *widget,
 644                                          GtkStyle       *style);
 645 void       gtk_widget_ensure_style      (GtkWidget      *widget);
 646 GtkStyle*  gtk_widget_get_style         (GtkWidget      *widget);
 647
 648 void        gtk_widget_modify_style       (GtkWidget            *widget,
 649                                            GtkRcStyle           *style);
 650 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 651 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 652                                            GtkStateType          state,
 653                                            const GdkColor       *color);
 654 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 655                                            GtkStateType          state,
 656                                            const GdkColor       *color);
 657 void        gtk_widget_modify_text        (GtkWidget            *widget,
 658                                            GtkStateType          state,
 659                                            const GdkColor       *color);
 660 void        gtk_widget_modify_base        (GtkWidget            *widget,
 661                                            GtkStateType          state,
 662                                            const GdkColor       *color);
 663 void        gtk_widget_modify_font        (GtkWidget            *widget,
 664                                            PangoFontDescription *font_desc);
 665
 666 #ifndef GTK_DISABLE_DEPRECATED
 667 #define gtk_widget_set_rc_style(widget)          (gtk_widget_set_style (widget, NULL))
 668 #define gtk_widget_restore_default_style(widget) (gtk_widget_set_style (widget, NULL))
 669 #endif
 670
 671 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 672 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 673 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 674                                                const gchar *text);
 675
 676 GdkPixbuf    *gtk_widget_render_icon          (GtkWidget   *widget,
 677                                                const gchar *stock_id,
 678                                                GtkIconSize  size,
 679                                                const gchar *detail);
 680
 681 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 682  * the returned name is newly allocated.
 683  */
 684 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 685                                          const gchar    *name);
 686 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 687
 688 /* Descend recursively and set rc-style on all widgets without user styles */
 689 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 690
 691 /* Push/pop pairs, to change default values upon a widget's creation.
 692  * This will override the values that got set by the
 693  * gtk_widget_set_default_* () functions.
 694  */
 695 void         gtk_widget_push_colormap        (GdkColormap *cmap);
 696 void         gtk_widget_push_composite_child (void);
 697 void         gtk_widget_pop_composite_child  (void);
 698 void         gtk_widget_pop_colormap         (void);
 699
 700 /* widget style properties
 701  */
 702 void gtk_widget_class_install_style_property        (GtkWidgetClass     *klass,
 703                                                      GParamSpec         *pspec);
 704 void gtk_widget_class_install_style_property_parser (GtkWidgetClass     *klass,
 705                                                      GParamSpec         *pspec,
 706                                                      GtkRcPropertyParser parser);
 707 GParamSpec*  gtk_widget_class_find_style_property   (GtkWidgetClass     *klass,
 708                                                      const gchar        *property_name);
 709 GParamSpec** gtk_widget_class_list_style_properties (GtkWidgetClass     *klass,
 710                                                      guint              *n_properties);
 711 void gtk_widget_style_get_property (GtkWidget        *widget,
 712                                     const gchar    *property_name,
 713                                     GValue           *value);
 714 void gtk_widget_style_get_valist   (GtkWidget        *widget,
 715                                     const gchar    *first_property_name,
 716                                     va_list         var_args);
 717 void gtk_widget_style_get          (GtkWidget        *widget,
 718                                     const gchar    *first_property_name,
 719                                     ...);
 720
 721
 722 /* Set certain default values to be used at widget creation time.
 723  */
 724 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
 725 GtkStyle*    gtk_widget_get_default_style    (void);
 726 #ifndef GDK_MULTIHEAD_SAFE
 727 GdkColormap* gtk_widget_get_default_colormap (void);
 728 GdkVisual*   gtk_widget_get_default_visual   (void);
 729 #endif
 730
 731 /* Functions for setting directionality for widgets
 732  */
 733
 734 void             gtk_widget_set_direction         (GtkWidget        *widget,
 735                                                    GtkTextDirection  dir);
 736 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 737
 738 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 739 GtkTextDirection gtk_widget_get_default_direction (void);
 740
 741 /* Counterpart to gdk_window_shape_combine_mask.
 742  */
 743 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
 744                                             GdkBitmap *shape_mask,
 745                                             gint       offset_x,
 746                                             gint       offset_y);
 747
 748 /* internal function */
 749 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 750
 751 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 752  * return newly alocated strings.
 753  */
 754 void         gtk_widget_path               (GtkWidget *widget,
 755                                             guint     *path_length,
 756                                             gchar    **path,
 757                                             gchar    **path_reversed);
 758 void         gtk_widget_class_path         (GtkWidget *widget,
 759                                             guint     *path_length,
 760                                             gchar    **path,
 761                                             gchar    **path_reversed);
 762
 763 GList* gtk_widget_get_mnemonic_labels   (GtkWidget *widget);
 764 void   gtk_widget_add_mnemonic_label    (GtkWidget *widget,
 765                                          GtkWidget *label);
 766 void   gtk_widget_remove_mnemonic_label (GtkWidget *widget,
 767                                          GtkWidget *label);
 768
 769 GType           gtk_requisition_get_type (void);
 770 GtkRequisition *gtk_requisition_copy     (const GtkRequisition *requisition);
 771 void            gtk_requisition_free     (GtkRequisition       *requisition);
 772
 773 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
 774 #  define gtk_widget_ref gtk_object_ref
 775 #  define gtk_widget_unref gtk_object_unref
 776 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
 777
 778 GtkWidgetAuxInfo *_gtk_widget_get_aux_info                (GtkWidget    *widget,
 779                                                            gboolean      create);
 780 void              _gtk_widget_propagate_hierarchy_changed (GtkWidget    *widget,
 781                                                            GtkWidget    *previous_toplevel);
 782 void              _gtk_widget_propagate_screen_changed    (GtkWidget    *widget,
 783                                                            GdkScreen    *previous_screen);
 784
 785 GdkColormap* _gtk_widget_peek_colormap (void);
 786
 787 #ifdef __cplusplus
 788 }
 789 #endif /* __cplusplus */
 790
 791
 792 #endif /* __GTK_WIDGET_H__ */