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
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif /* __cplusplus */
  40
  41
  42 /* The flags that are used by GtkWidget on top of the
  43  * flags field of GtkObject.
  44  */
  45 typedef enum
  46 {
  47   GTK_TOPLEVEL         = 1 << 4,
  48   GTK_NO_WINDOW        = 1 << 5,
  49   GTK_REALIZED         = 1 << 6,
  50   GTK_MAPPED           = 1 << 7,
  51   GTK_VISIBLE          = 1 << 8,
  52   GTK_SENSITIVE        = 1 << 9,
  53   GTK_PARENT_SENSITIVE = 1 << 10,
  54   GTK_CAN_FOCUS        = 1 << 11,
  55   GTK_HAS_FOCUS        = 1 << 12,
  56
  57   /* widget is allowed to receive the default via gtk_widget_grab_default
  58    * and will reserve space to draw the default if possible */
  59   GTK_CAN_DEFAULT      = 1 << 13,
  60
  61   /* the widget currently is receiving the default action and should be drawn
  62    * appropriately if possible */
  63   GTK_HAS_DEFAULT      = 1 << 14,
  64
  65   GTK_HAS_GRAB         = 1 << 15,
  66   GTK_RC_STYLE         = 1 << 16,
  67   GTK_COMPOSITE_CHILD  = 1 << 17,
  68   GTK_NO_REPARENT      = 1 << 18,
  69   GTK_APP_PAINTABLE    = 1 << 19,
  70
  71   /* the widget when focused will receive the default action and have
  72    * HAS_DEFAULT set even if there is a different widget set as default */
  73   GTK_RECEIVES_DEFAULT = 1 << 20,
  74
  75   GTK_DOUBLE_BUFFERED  = 1 << 21
  76 } GtkWidgetFlags;
  77
  78 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
  79  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
  80  */
  81 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
  82 #define GTK_WIDGET(widget)                (GTK_CHECK_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
  83 #define GTK_WIDGET_CLASS(klass)           (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
  84 #define GTK_IS_WIDGET(widget)             (GTK_CHECK_TYPE ((widget), GTK_TYPE_WIDGET))
  85 #define GTK_IS_WIDGET_CLASS(klass)        (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
  86 #define GTK_WIDGET_GET_CLASS(obj)         (GTK_CHECK_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
  87
  88 /* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
  89  */
  90 #define GTK_WIDGET_TYPE(wid)              (GTK_OBJECT_TYPE (wid))
  91 #define GTK_WIDGET_STATE(wid)             (GTK_WIDGET (wid)->state)
  92 #define GTK_WIDGET_SAVED_STATE(wid)       (GTK_WIDGET (wid)->saved_state)
  93
  94 /* Macros for extracting the widget flags from GtkWidget.
  95  */
  96 #define GTK_WIDGET_FLAGS(wid)             (GTK_OBJECT_FLAGS (wid))
  97 #define GTK_WIDGET_TOPLEVEL(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
  98 #define GTK_WIDGET_NO_WINDOW(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
  99 #define GTK_WIDGET_REALIZED(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
 100 #define GTK_WIDGET_MAPPED(wid)            ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
 101 #define GTK_WIDGET_VISIBLE(wid)           ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
 102 #define GTK_WIDGET_DRAWABLE(wid)          (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))
 103 #define GTK_WIDGET_SENSITIVE(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
 104 #define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
 105 #define GTK_WIDGET_IS_SENSITIVE(wid)      (GTK_WIDGET_SENSITIVE (wid) && \
 106                                            GTK_WIDGET_PARENT_SENSITIVE (wid))
 107 #define GTK_WIDGET_CAN_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
 108 #define GTK_WIDGET_HAS_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
 109 #define GTK_WIDGET_CAN_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
 110 #define GTK_WIDGET_HAS_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
 111 #define GTK_WIDGET_HAS_GRAB(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
 112 #define GTK_WIDGET_RC_STYLE(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
 113 #define GTK_WIDGET_COMPOSITE_CHILD(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
 114 #define GTK_WIDGET_APP_PAINTABLE(wid)     ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)
 115 #define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)
 116 #define GTK_WIDGET_DOUBLE_BUFFERED(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)
 117
 118 /* Macros for setting and clearing widget flags.
 119  */
 120 #define GTK_WIDGET_SET_FLAGS(wid,flag)    G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
 121 #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
 122
 123
 124
 125 typedef struct _GtkRequisition    GtkRequisition;
 126 typedef struct _GdkRectangle      GtkAllocation;
 127 typedef struct _GtkSelectionData GtkSelectionData;
 128 typedef struct _GtkWidgetClass    GtkWidgetClass;
 129 typedef struct _GtkWidgetAuxInfo  GtkWidgetAuxInfo;
 130 typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
 131
 132 typedef void (*GtkCallback) (GtkWidget *widget,
 133                              gpointer   data);
 134
 135 /* A requisition is a desired amount of space which a
 136  *  widget may request.
 137  */
 138 struct _GtkRequisition
 139 {
 140   gint width;
 141   gint height;
 142 };
 143
 144 /* The widget is the base of the tree for displayable objects.
 145  *  (A displayable object is one which takes up some amount
 146  *  of screen real estate). It provides a common base and interface
 147  *  which actual widgets must adhere to.
 148  */
 149 struct _GtkWidget
 150 {
 151   /* The object structure needs to be the first
 152    *  element in the widget structure in order for
 153    *  the object mechanism to work correctly. This
 154    *  allows a GtkWidget pointer to be cast to a
 155    *  GtkObject pointer.
 156    */
 157   GtkObject object;
 158
 159   /* 16 bits of internally used private flags.
 160    * this will be packed into the same 4 byte alignment frame that
 161    * state and saved_state go. we therefore don't waste any new
 162    * space on this.
 163    */
 164   guint16 private_flags;
 165
 166   /* The state of the widget. There are actually only
 167    *  5 widget states (defined in "gtkenums.h").
 168    */
 169   guint8 state;
 170
 171   /* The saved state of the widget. When a widgets state
 172    *  is changed to GTK_STATE_INSENSITIVE via
 173    *  "gtk_widget_set_state" or "gtk_widget_set_sensitive"
 174    *  the old state is kept around in this field. The state
 175    *  will be restored once the widget gets sensitive again.
 176    */
 177   guint8 saved_state;
 178
 179   /* The widgets name. If the widget does not have a name
 180    *  (the name is NULL), then its name (as returned by
 181    *  "gtk_widget_get_name") is its classes name.
 182    * Among other things, the widget name is used to determine
 183    *  the style to use for a widget.
 184    */
 185   gchar *name;
 186
 187   /* The style for the widget. The style contains the
 188    *  colors the widget should be drawn in for each state
 189    *  along with graphics contexts used to draw with and
 190    *  the font to use for text.
 191    */
 192   GtkStyle *style;
 193
 194   /* The widgets desired size.
 195    */
 196   GtkRequisition requisition;
 197
 198   /* The widgets allocated size.
 199    */
 200   GtkAllocation allocation;
 201
 202   /* The widgets window or its parent window if it does
 203    *  not have a window. (Which will be indicated by the
 204    *  GTK_NO_WINDOW flag being set).
 205    */
 206   GdkWindow *window;
 207
 208   /* The widgets parent.
 209    */
 210   GtkWidget *parent;
 211 };
 212
 213 struct _GtkWidgetClass
 214 {
 215   /* The object class structure needs to be the first
 216    *  element in the widget class structure in order for
 217    *  the class mechanism to work correctly. This allows a
 218    *  GtkWidgetClass pointer to be cast to a GtkObjectClass
 219    *  pointer.
 220    */
 221   GtkObjectClass parent_class;
 222
 223   /* The signal to emit when a widget of this class is activated,
 224    * gtk_widget_activate() handles the emission.
 225    * Implementation of this signal is optional.
 226    */
 227   guint activate_signal;
 228
 229   /* This signal is emitted  when a widget of this class is added
 230    * to a scrolling aware parent, gtk_widget_set_scroll_adjustments()
 231    * handles the emission.
 232    * Implementation of this signal is optional.
 233    */
 234   guint set_scroll_adjustments_signal;
 235
 236   /* basics */
 237   void (* show)                (GtkWidget        *widget);
 238   void (* show_all)            (GtkWidget        *widget);
 239   void (* hide)                (GtkWidget        *widget);
 240   void (* hide_all)            (GtkWidget        *widget);
 241   void (* map)                 (GtkWidget        *widget);
 242   void (* unmap)               (GtkWidget        *widget);
 243   void (* realize)             (GtkWidget        *widget);
 244   void (* unrealize)           (GtkWidget        *widget);
 245   void (* draw_focus)          (GtkWidget        *widget);
 246   void (* draw_default)        (GtkWidget        *widget);
 247   void (* size_request)        (GtkWidget        *widget,
 248                                 GtkRequisition   *requisition);
 249   void (* size_allocate)       (GtkWidget        *widget,
 250                                 GtkAllocation    *allocation);
 251   void (* state_changed)       (GtkWidget        *widget,
 252                                 GtkStateType      previous_state);
 253   void (* parent_set)          (GtkWidget        *widget,
 254                                 GtkWidget        *previous_parent);
 255   void (* style_set)           (GtkWidget        *widget,
 256                                 GtkStyle         *previous_style);
 257   void (* direction_changed)   (GtkWidget        *widget,
 258                                 GtkTextDirection  previous_direction);
 259
 260   /* accelerators */
 261   gint (* add_accelerator)     (GtkWidget      *widget,
 262                                 guint           accel_signal_id,
 263                                 GtkAccelGroup  *accel_group,
 264                                 guint           accel_key,
 265                                 GdkModifierType accel_mods,
 266                                 GtkAccelFlags   accel_flags);
 267   void (* remove_accelerator)  (GtkWidget      *widget,
 268                                 GtkAccelGroup  *accel_group,
 269                                 guint           accel_key,
 270                                 GdkModifierType accel_mods);
 271
 272   /* explicit focus */
 273   void (* grab_focus)          (GtkWidget      *widget);
 274
 275   /* events */
 276   gint (* event)                   (GtkWidget          *widget,
 277                                     GdkEvent           *event);
 278   gint (* button_press_event)      (GtkWidget          *widget,
 279                                     GdkEventButton     *event);
 280   gint (* button_release_event)    (GtkWidget          *widget,
 281                                     GdkEventButton     *event);
 282   gint (* scroll_event)            (GtkWidget          *widget,
 283                                     GdkEventScroll     *event);
 284   gint (* motion_notify_event)     (GtkWidget          *widget,
 285                                     GdkEventMotion     *event);
 286   gint (* delete_event)            (GtkWidget          *widget,
 287                                     GdkEventAny        *event);
 288   gint (* destroy_event)           (GtkWidget          *widget,
 289                                     GdkEventAny        *event);
 290   gint (* expose_event)            (GtkWidget          *widget,
 291                                     GdkEventExpose     *event);
 292   gint (* key_press_event)         (GtkWidget          *widget,
 293                                     GdkEventKey        *event);
 294   gint (* key_release_event)       (GtkWidget          *widget,
 295                                     GdkEventKey        *event);
 296   gint (* enter_notify_event)      (GtkWidget          *widget,
 297                                     GdkEventCrossing   *event);
 298   gint (* leave_notify_event)      (GtkWidget          *widget,
 299                                     GdkEventCrossing   *event);
 300   gint (* configure_event)         (GtkWidget          *widget,
 301                                     GdkEventConfigure  *event);
 302   gint (* focus_in_event)          (GtkWidget          *widget,
 303                                     GdkEventFocus      *event);
 304   gint (* focus_out_event)         (GtkWidget          *widget,
 305                                     GdkEventFocus      *event);
 306   gint (* map_event)               (GtkWidget          *widget,
 307                                     GdkEventAny        *event);
 308   gint (* unmap_event)             (GtkWidget          *widget,
 309                                     GdkEventAny        *event);
 310   gint (* property_notify_event)   (GtkWidget          *widget,
 311                                     GdkEventProperty   *event);
 312   gint (* selection_clear_event)   (GtkWidget          *widget,
 313                                     GdkEventSelection  *event);
 314   gint (* selection_request_event) (GtkWidget          *widget,
 315                                     GdkEventSelection  *event);
 316   gint (* selection_notify_event)  (GtkWidget          *widget,
 317                                     GdkEventSelection  *event);
 318   gint (* proximity_in_event)      (GtkWidget          *widget,
 319                                     GdkEventProximity  *event);
 320   gint (* proximity_out_event)     (GtkWidget          *widget,
 321                                     GdkEventProximity  *event);
 322   gint (* visibility_notify_event)  (GtkWidget         *widget,
 323                                      GdkEventVisibility *event);
 324   gint (* client_event)            (GtkWidget          *widget,
 325                                     GdkEventClient     *event);
 326   gint (* no_expose_event)         (GtkWidget          *widget,
 327                                     GdkEventAny        *event);
 328
 329   /* selection */
 330   void (* selection_get)           (GtkWidget          *widget,
 331                                     GtkSelectionData   *selection_data,
 332                                     guint               info,
 333                                     guint               time);
 334   void (* selection_received)      (GtkWidget          *widget,
 335                                     GtkSelectionData   *selection_data,
 336                                     guint               time);
 337
 338   /* Source side drag signals */
 339   void (* drag_begin)              (GtkWidget          *widget,
 340                                     GdkDragContext     *context);
 341   void (* drag_end)                (GtkWidget          *widget,
 342                                     GdkDragContext     *context);
 343   void (* drag_data_get)           (GtkWidget          *widget,
 344                                     GdkDragContext     *context,
 345                                     GtkSelectionData   *selection_data,
 346                                     guint               info,
 347                                     guint               time);
 348   void (* drag_data_delete)        (GtkWidget          *widget,
 349                                     GdkDragContext     *context);
 350
 351   /* Target side drag signals */
 352   void (* drag_leave)              (GtkWidget          *widget,
 353                                     GdkDragContext     *context,
 354                                     guint               time);
 355   gboolean (* drag_motion)         (GtkWidget          *widget,
 356                                     GdkDragContext     *context,
 357                                     gint                x,
 358                                     gint                y,
 359                                     guint               time);
 360   gboolean (* drag_drop)           (GtkWidget          *widget,
 361                                     GdkDragContext     *context,
 362                                     gint                x,
 363                                     gint                y,
 364                                     guint               time);
 365   void (* drag_data_received)      (GtkWidget          *widget,
 366                                     GdkDragContext     *context,
 367                                     gint                x,
 368                                     gint                y,
 369                                     GtkSelectionData   *selection_data,
 370                                     guint               info,
 371                                     guint               time);
 372
 373   /* action signals */
 374   void (* debug_msg)               (GtkWidget          *widget,
 375                                     const gchar        *string);
 376
 377   /* Padding for future expandsion */
 378   GtkFunction pad1;
 379   GtkFunction pad2;
 380   GtkFunction pad3;
 381   GtkFunction pad4;
 382 };
 383
 384 struct _GtkWidgetAuxInfo
 385 {
 386   gint16  x;
 387   gint16  y;
 388   gint16 width;
 389   gint16 height;
 390 };
 391
 392 struct _GtkWidgetShapeInfo
 393 {
 394   gint16     offset_x;
 395   gint16     offset_y;
 396   GdkBitmap *shape_mask;
 397 };
 398
 399 GtkType    gtk_widget_get_type            (void) G_GNUC_CONST;
 400 GtkWidget* gtk_widget_new                 (GtkType              type,
 401                                            const gchar         *first_arg_name,
 402                                            ...);
 403 GtkWidget* gtk_widget_newv                (GtkType              type,
 404                                            guint                nargs,
 405                                            GtkArg              *args);
 406 GtkWidget* gtk_widget_ref                 (GtkWidget           *widget);
 407 void       gtk_widget_unref               (GtkWidget           *widget);
 408 void       gtk_widget_destroy             (GtkWidget           *widget);
 409 void       gtk_widget_destroyed           (GtkWidget           *widget,
 410                                            GtkWidget          **widget_pointer);
 411 void       gtk_widget_get                 (GtkWidget           *widget,
 412                                            GtkArg              *arg);
 413 void       gtk_widget_getv                (GtkWidget           *widget,
 414                                            guint                nargs,
 415                                            GtkArg              *args);
 416 void       gtk_widget_set                 (GtkWidget           *widget,
 417                                            const gchar         *first_arg_name,
 418                                            ...);
 419 void       gtk_widget_setv                (GtkWidget           *widget,
 420                                            guint                nargs,
 421                                            GtkArg              *args);
 422 void       gtk_widget_unparent            (GtkWidget           *widget);
 423 void       gtk_widget_show                (GtkWidget           *widget);
 424 void       gtk_widget_show_now            (GtkWidget           *widget);
 425 void       gtk_widget_hide                (GtkWidget           *widget);
 426 void       gtk_widget_show_all            (GtkWidget           *widget);
 427 void       gtk_widget_hide_all            (GtkWidget           *widget);
 428 void       gtk_widget_map                 (GtkWidget           *widget);
 429 void       gtk_widget_unmap               (GtkWidget           *widget);
 430 void       gtk_widget_realize             (GtkWidget           *widget);
 431 void       gtk_widget_unrealize           (GtkWidget           *widget);
 432
 433 /* Queuing draws */
 434 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 435 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 436                                            gint                 x,
 437                                            gint                 y,
 438                                            gint                 width,
 439                                            gint                 height);
 440 void       gtk_widget_queue_clear         (GtkWidget           *widget);
 441 void       gtk_widget_queue_clear_area    (GtkWidget           *widget,
 442                                            gint                 x,
 443                                            gint                 y,
 444                                            gint                 width,
 445                                            gint                 height);
 446
 447
 448 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 449 void       gtk_widget_draw                (GtkWidget           *widget,
 450                                            GdkRectangle        *area);
 451 void       gtk_widget_draw_focus          (GtkWidget           *widget);
 452 void       gtk_widget_draw_default        (GtkWidget           *widget);
 453 void       gtk_widget_size_request        (GtkWidget           *widget,
 454                                            GtkRequisition      *requisition);
 455 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 456                                            GtkAllocation       *allocation);
 457 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 458                                              GtkRequisition    *requisition);
 459 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 460                                            const gchar         *accel_signal,
 461                                            GtkAccelGroup       *accel_group,
 462                                            guint                accel_key,
 463                                            guint                accel_mods,
 464                                            GtkAccelFlags        accel_flags);
 465 void       gtk_widget_remove_accelerator  (GtkWidget           *widget,
 466                                            GtkAccelGroup       *accel_group,
 467                                            guint                accel_key,
 468                                            guint                accel_mods);
 469 void       gtk_widget_remove_accelerators (GtkWidget           *widget,
 470                                            const gchar         *accel_signal,
 471                                            gboolean             visible_only);
 472 guint      gtk_widget_accelerator_signal  (GtkWidget           *widget,
 473                                            GtkAccelGroup       *accel_group,
 474                                            guint                accel_key,
 475                                            guint                accel_mods);
 476 void       gtk_widget_lock_accelerators   (GtkWidget           *widget);
 477 void       gtk_widget_unlock_accelerators (GtkWidget           *widget);
 478 gboolean   gtk_widget_accelerators_locked (GtkWidget           *widget);
 479 gint       gtk_widget_event               (GtkWidget           *widget,
 480                                            GdkEvent            *event);
 481
 482 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 483 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 484                                               GtkAdjustment    *hadjustment,
 485                                               GtkAdjustment    *vadjustment);
 486
 487 void       gtk_widget_reparent            (GtkWidget           *widget,
 488                                            GtkWidget           *new_parent);
 489 void       gtk_widget_popup               (GtkWidget           *widget,
 490                                            gint                 x,
 491                                            gint                 y);
 492 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 493                                            GdkRectangle        *area,
 494                                            GdkRectangle        *intersection);
 495
 496 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 497 void       gtk_widget_grab_default        (GtkWidget           *widget);
 498
 499 void       gtk_widget_set_name            (GtkWidget           *widget,
 500                                            const gchar         *name);
 501 gchar*     gtk_widget_get_name            (GtkWidget           *widget);
 502 void       gtk_widget_set_state           (GtkWidget           *widget,
 503                                            GtkStateType         state);
 504 void       gtk_widget_set_sensitive       (GtkWidget           *widget,
 505                                            gboolean             sensitive);
 506 void       gtk_widget_set_app_paintable   (GtkWidget           *widget,
 507                                            gboolean             app_paintable);
 508 void       gtk_widget_set_double_buffered (GtkWidget           *widget,
 509                                            gboolean             double_buffered);
 510 void       gtk_widget_set_parent          (GtkWidget           *widget,
 511                                            GtkWidget           *parent);
 512 void       gtk_widget_set_parent_window   (GtkWidget           *widget,
 513                                            GdkWindow           *parent_window);
 514 GdkWindow *gtk_widget_get_parent_window   (GtkWidget           *widget);
 515 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 516                                            gint                 x,
 517                                            gint                 y);
 518 void       gtk_widget_set_usize           (GtkWidget           *widget,
 519                                            gint                 width,
 520                                            gint                 height);
 521 void       gtk_widget_set_events          (GtkWidget           *widget,
 522                                            gint                 events);
 523 void       gtk_widget_add_events          (GtkWidget           *widget,
 524                                            gint                 events);
 525 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 526                                             GdkExtensionMode    mode);
 527
 528 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 529 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 530 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 531                                          GtkType        widget_type);
 532 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
 533 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 534
 535 /* The following functions must not be called on an already
 536  * realized widget. Because it is possible that somebody
 537  * can call get_colormap() or get_visual() and save the
 538  * result, these functions are probably only safe to
 539  * call in a widget's init() function.
 540  */
 541 void         gtk_widget_set_colormap    (GtkWidget      *widget,
 542                                          GdkColormap    *colormap);
 543
 544 gint         gtk_widget_get_events      (GtkWidget      *widget);
 545 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 546                                          gint           *x,
 547                                          gint           *y);
 548
 549 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 550                                          GtkWidget      *ancestor);
 551
 552 /* Hide widget and return TRUE.
 553  */
 554 gint       gtk_widget_hide_on_delete    (GtkWidget      *widget);
 555
 556 /* Widget styles.
 557  */
 558 void       gtk_widget_set_style         (GtkWidget      *widget,
 559                                          GtkStyle       *style);
 560 void       gtk_widget_set_rc_style      (GtkWidget      *widget);
 561 void       gtk_widget_ensure_style      (GtkWidget      *widget);
 562 GtkStyle*  gtk_widget_get_style         (GtkWidget      *widget);
 563 void       gtk_widget_restore_default_style (GtkWidget  *widget);
 564
 565 void        gtk_widget_modify_style       (GtkWidget            *widget,
 566                                            GtkRcStyle           *style);
 567 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 568 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 569                                            GtkStateType          state,
 570                                            GdkColor             *color);
 571 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 572                                            GtkStateType          state,
 573                                            GdkColor             *color);
 574 void        gtk_widget_modify_text        (GtkWidget            *widget,
 575                                            GtkStateType          state,
 576                                            GdkColor             *color);
 577 void        gtk_widget_modify_base        (GtkWidget            *widget,
 578                                            GtkStateType          state,
 579                                            GdkColor             *color);
 580 void        gtk_widget_modify_font        (GtkWidget            *widget,
 581                                            PangoFontDescription *font_desc);
 582
 583 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 584 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 585 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 586                                                const gchar *text);
 587
 588 GdkPixbuf* gtk_widget_render_stock_icon       (GtkWidget      *widget,
 589                                                const gchar    *stock_id,
 590                                                const gchar    *size,
 591                                                const gchar    *detail);
 592
 593 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 594  * the returned name is newly allocated.
 595  */
 596 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 597                                          const gchar    *name);
 598 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 599
 600 /* Descend recursively and set rc-style on all widgets without user styles */
 601 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 602
 603 /* Push/pop pairs, to change default values upon a widget's creation.
 604  * This will override the values that got set by the
 605  * gtk_widget_set_default_* () functions.
 606  */
 607 void         gtk_widget_push_style           (GtkStyle   *style);
 608 void         gtk_widget_push_colormap        (GdkColormap *cmap);
 609 void         gtk_widget_push_composite_child (void);
 610 void         gtk_widget_pop_composite_child  (void);
 611 void         gtk_widget_pop_style            (void);
 612 void         gtk_widget_pop_colormap         (void);
 613
 614 /* Set certain default values to be used at widget creation time.
 615  */
 616 void         gtk_widget_set_default_style    (GtkStyle    *style);
 617 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
 618 GtkStyle*    gtk_widget_get_default_style    (void);
 619 GdkColormap* gtk_widget_get_default_colormap (void);
 620 GdkVisual*   gtk_widget_get_default_visual   (void);
 621
 622 /* Functions for setting directionality for widgets
 623  */
 624
 625 void             gtk_widget_set_direction         (GtkWidget        *widget,
 626                                                    GtkTextDirection  dir);
 627 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 628
 629 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 630 GtkTextDirection gtk_widget_get_default_direction (void);
 631
 632 /* Counterpart to gdk_window_shape_combine_mask.
 633  */
 634 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
 635                                             GdkBitmap *shape_mask,
 636                                             gint       offset_x,
 637                                             gint       offset_y);
 638
 639 /* internal function */
 640 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 641
 642 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 643  * return newly alocated strings.
 644  */
 645 void         gtk_widget_path               (GtkWidget *widget,
 646                                             guint     *path_length,
 647                                             gchar    **path,
 648                                             gchar    **path_reversed);
 649 void         gtk_widget_class_path         (GtkWidget *widget,
 650                                             guint     *path_length,
 651                                             gchar    **path,
 652                                             gchar    **path_reversed);
 653
 654 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
 655 #  define gtk_widget_ref gtk_object_ref
 656 #  define gtk_widget_unref gtk_object_unref
 657 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
 658
 659
 660
 661 #ifdef __cplusplus
 662 }
 663 #endif /* __cplusplus */
 664
 665
 666 #endif /* __GTK_WIDGET_H__ */