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 (* size_request)        (GtkWidget        *widget,
 246                                 GtkRequisition   *requisition);
 247   void (* size_allocate)       (GtkWidget        *widget,
 248                                 GtkAllocation    *allocation);
 249   void (* state_changed)       (GtkWidget        *widget,
 250                                 GtkStateType      previous_state);
 251   void (* parent_set)          (GtkWidget        *widget,
 252                                 GtkWidget        *previous_parent);
 253   void (* hierarchy_changed)   (GtkWidget        *widget);
 254   void (* style_set)           (GtkWidget        *widget,
 255                                 GtkStyle         *previous_style);
 256   void (* direction_changed)   (GtkWidget        *widget,
 257                                 GtkTextDirection  previous_direction);
 258
 259   /* accelerators */
 260   gint (* add_accelerator)     (GtkWidget      *widget,
 261                                 guint           accel_signal_id,
 262                                 GtkAccelGroup  *accel_group,
 263                                 guint           accel_key,
 264                                 GdkModifierType accel_mods,
 265                                 GtkAccelFlags   accel_flags);
 266   void (* remove_accelerator)  (GtkWidget      *widget,
 267                                 GtkAccelGroup  *accel_group,
 268                                 guint           accel_key,
 269                                 GdkModifierType accel_mods);
 270
 271   /* explicit focus */
 272   void (* grab_focus)          (GtkWidget      *widget);
 273
 274   /* events */
 275   gint (* event)                   (GtkWidget          *widget,
 276                                     GdkEvent           *event);
 277   gint (* button_press_event)      (GtkWidget          *widget,
 278                                     GdkEventButton     *event);
 279   gint (* button_release_event)    (GtkWidget          *widget,
 280                                     GdkEventButton     *event);
 281   gint (* scroll_event)            (GtkWidget          *widget,
 282                                     GdkEventScroll     *event);
 283   gint (* motion_notify_event)     (GtkWidget          *widget,
 284                                     GdkEventMotion     *event);
 285   gint (* delete_event)            (GtkWidget          *widget,
 286                                     GdkEventAny        *event);
 287   gint (* destroy_event)           (GtkWidget          *widget,
 288                                     GdkEventAny        *event);
 289   gint (* expose_event)            (GtkWidget          *widget,
 290                                     GdkEventExpose     *event);
 291   gint (* key_press_event)         (GtkWidget          *widget,
 292                                     GdkEventKey        *event);
 293   gint (* key_release_event)       (GtkWidget          *widget,
 294                                     GdkEventKey        *event);
 295   gint (* enter_notify_event)      (GtkWidget          *widget,
 296                                     GdkEventCrossing   *event);
 297   gint (* leave_notify_event)      (GtkWidget          *widget,
 298                                     GdkEventCrossing   *event);
 299   gint (* configure_event)         (GtkWidget          *widget,
 300                                     GdkEventConfigure  *event);
 301   gint (* focus_in_event)          (GtkWidget          *widget,
 302                                     GdkEventFocus      *event);
 303   gint (* focus_out_event)         (GtkWidget          *widget,
 304                                     GdkEventFocus      *event);
 305   gint (* map_event)               (GtkWidget          *widget,
 306                                     GdkEventAny        *event);
 307   gint (* unmap_event)             (GtkWidget          *widget,
 308                                     GdkEventAny        *event);
 309   gint (* property_notify_event)   (GtkWidget          *widget,
 310                                     GdkEventProperty   *event);
 311   gint (* selection_clear_event)   (GtkWidget          *widget,
 312                                     GdkEventSelection  *event);
 313   gint (* selection_request_event) (GtkWidget          *widget,
 314                                     GdkEventSelection  *event);
 315   gint (* selection_notify_event)  (GtkWidget          *widget,
 316                                     GdkEventSelection  *event);
 317   gint (* proximity_in_event)      (GtkWidget          *widget,
 318                                     GdkEventProximity  *event);
 319   gint (* proximity_out_event)     (GtkWidget          *widget,
 320                                     GdkEventProximity  *event);
 321   gint (* visibility_notify_event)  (GtkWidget         *widget,
 322                                      GdkEventVisibility *event);
 323   gint (* client_event)            (GtkWidget          *widget,
 324                                     GdkEventClient     *event);
 325   gint (* no_expose_event)         (GtkWidget          *widget,
 326                                     GdkEventAny        *event);
 327   gint (* window_state_event)      (GtkWidget          *widget,
 328                                     GdkEventWindowState *event);
 329
 330   /* selection */
 331   void (* selection_get)           (GtkWidget          *widget,
 332                                     GtkSelectionData   *selection_data,
 333                                     guint               info,
 334                                     guint               time);
 335   void (* selection_received)      (GtkWidget          *widget,
 336                                     GtkSelectionData   *selection_data,
 337                                     guint               time);
 338
 339   /* Source side drag signals */
 340   void (* drag_begin)              (GtkWidget          *widget,
 341                                     GdkDragContext     *context);
 342   void (* drag_end)                (GtkWidget          *widget,
 343                                     GdkDragContext     *context);
 344   void (* drag_data_get)           (GtkWidget          *widget,
 345                                     GdkDragContext     *context,
 346                                     GtkSelectionData   *selection_data,
 347                                     guint               info,
 348                                     guint               time);
 349   void (* drag_data_delete)        (GtkWidget          *widget,
 350                                     GdkDragContext     *context);
 351
 352   /* Target side drag signals */
 353   void (* drag_leave)              (GtkWidget          *widget,
 354                                     GdkDragContext     *context,
 355                                     guint               time);
 356   gboolean (* drag_motion)         (GtkWidget          *widget,
 357                                     GdkDragContext     *context,
 358                                     gint                x,
 359                                     gint                y,
 360                                     guint               time);
 361   gboolean (* drag_drop)           (GtkWidget          *widget,
 362                                     GdkDragContext     *context,
 363                                     gint                x,
 364                                     gint                y,
 365                                     guint               time);
 366   void (* drag_data_received)      (GtkWidget          *widget,
 367                                     GdkDragContext     *context,
 368                                     gint                x,
 369                                     gint                y,
 370                                     GtkSelectionData   *selection_data,
 371                                     guint               info,
 372                                     guint               time);
 373
 374   /* Padding for future expandsion */
 375   GtkFunction pad1;
 376   GtkFunction pad2;
 377   GtkFunction pad3;
 378   GtkFunction pad4;
 379 };
 380
 381 struct _GtkWidgetAuxInfo
 382 {
 383   gint16  x;
 384   gint16  y;
 385   gint16 width;
 386   gint16 height;
 387 };
 388
 389 struct _GtkWidgetShapeInfo
 390 {
 391   gint16     offset_x;
 392   gint16     offset_y;
 393   GdkBitmap *shape_mask;
 394 };
 395
 396 GtkType    gtk_widget_get_type            (void) G_GNUC_CONST;
 397 GtkWidget* gtk_widget_new                 (GtkType              type,
 398                                            const gchar         *first_property_name,
 399                                            ...);
 400 GtkWidget* gtk_widget_ref                 (GtkWidget           *widget);
 401 void       gtk_widget_unref               (GtkWidget           *widget);
 402 void       gtk_widget_destroy             (GtkWidget           *widget);
 403 void       gtk_widget_destroyed           (GtkWidget           *widget,
 404                                            GtkWidget          **widget_pointer);
 405 void       gtk_widget_set                 (GtkWidget           *widget,
 406                                            const gchar         *first_property_name,
 407                                            ...);
 408 void       gtk_widget_unparent            (GtkWidget           *widget);
 409 void       gtk_widget_show                (GtkWidget           *widget);
 410 void       gtk_widget_show_now            (GtkWidget           *widget);
 411 void       gtk_widget_hide                (GtkWidget           *widget);
 412 void       gtk_widget_show_all            (GtkWidget           *widget);
 413 void       gtk_widget_hide_all            (GtkWidget           *widget);
 414 void       gtk_widget_map                 (GtkWidget           *widget);
 415 void       gtk_widget_unmap               (GtkWidget           *widget);
 416 void       gtk_widget_realize             (GtkWidget           *widget);
 417 void       gtk_widget_unrealize           (GtkWidget           *widget);
 418
 419 /* Queuing draws */
 420 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 421 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 422                                            gint                 x,
 423                                            gint                 y,
 424                                            gint                 width,
 425                                            gint                 height);
 426 #ifndef GTK_DISABLE_DEPRECATED
 427 void       gtk_widget_queue_clear         (GtkWidget           *widget);
 428 void       gtk_widget_queue_clear_area    (GtkWidget           *widget,
 429                                            gint                 x,
 430                                            gint                 y,
 431                                            gint                 width,
 432                                            gint                 height);
 433 #endif /* GTK_DISABLE_DEPRECATED */
 434
 435
 436 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 437 #ifndef GTK_DISABLE_DEPRECATED
 438 void       gtk_widget_draw                (GtkWidget           *widget,
 439                                            GdkRectangle        *area);
 440 #endif /* GTK_DISABLE_DEPRECATED */
 441 void       gtk_widget_size_request        (GtkWidget           *widget,
 442                                            GtkRequisition      *requisition);
 443 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 444                                            GtkAllocation       *allocation);
 445 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 446                                              GtkRequisition    *requisition);
 447 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 448                                            const gchar         *accel_signal,
 449                                            GtkAccelGroup       *accel_group,
 450                                            guint                accel_key,
 451                                            guint                accel_mods,
 452                                            GtkAccelFlags        accel_flags);
 453 void       gtk_widget_remove_accelerator  (GtkWidget           *widget,
 454                                            GtkAccelGroup       *accel_group,
 455                                            guint                accel_key,
 456                                            guint                accel_mods);
 457 void       gtk_widget_remove_accelerators (GtkWidget           *widget,
 458                                            const gchar         *accel_signal,
 459                                            gboolean             visible_only);
 460 guint      gtk_widget_accelerator_signal  (GtkWidget           *widget,
 461                                            GtkAccelGroup       *accel_group,
 462                                            guint                accel_key,
 463                                            guint                accel_mods);
 464 void       gtk_widget_lock_accelerators   (GtkWidget           *widget);
 465 void       gtk_widget_unlock_accelerators (GtkWidget           *widget);
 466 gboolean   gtk_widget_accelerators_locked (GtkWidget           *widget);
 467 gint       gtk_widget_event               (GtkWidget           *widget,
 468                                            GdkEvent            *event);
 469
 470 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 471 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 472                                               GtkAdjustment    *hadjustment,
 473                                               GtkAdjustment    *vadjustment);
 474
 475 void       gtk_widget_reparent            (GtkWidget           *widget,
 476                                            GtkWidget           *new_parent);
 477 void       gtk_widget_popup               (GtkWidget           *widget,
 478                                            gint                 x,
 479                                            gint                 y);
 480 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 481                                            GdkRectangle        *area,
 482                                            GdkRectangle        *intersection);
 483
 484 gboolean   gtk_widget_is_focus            (GtkWidget           *widget);
 485 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 486 void       gtk_widget_grab_default        (GtkWidget           *widget);
 487
 488 void       gtk_widget_set_name            (GtkWidget           *widget,
 489                                            const gchar         *name);
 490 G_CONST_RETURN gchar* gtk_widget_get_name (GtkWidget           *widget);
 491 void       gtk_widget_set_state           (GtkWidget           *widget,
 492                                            GtkStateType         state);
 493 void       gtk_widget_set_sensitive       (GtkWidget           *widget,
 494                                            gboolean             sensitive);
 495 void       gtk_widget_set_app_paintable   (GtkWidget           *widget,
 496                                            gboolean             app_paintable);
 497 void       gtk_widget_set_double_buffered (GtkWidget           *widget,
 498                                            gboolean             double_buffered);
 499 void       gtk_widget_set_parent          (GtkWidget           *widget,
 500                                            GtkWidget           *parent);
 501 void       gtk_widget_set_parent_window   (GtkWidget           *widget,
 502                                            GdkWindow           *parent_window);
 503 GdkWindow *gtk_widget_get_parent_window   (GtkWidget           *widget);
 504 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 505                                            gint                 x,
 506                                            gint                 y);
 507 void       gtk_widget_set_usize           (GtkWidget           *widget,
 508                                            gint                 width,
 509                                            gint                 height);
 510 void       gtk_widget_set_events          (GtkWidget           *widget,
 511                                            gint                 events);
 512 void       gtk_widget_add_events          (GtkWidget           *widget,
 513                                            gint                 events);
 514 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 515                                             GdkExtensionMode    mode);
 516
 517 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 518 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 519 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 520                                          GtkType        widget_type);
 521 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
 522 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 523
 524 /* The following functions must not be called on an already
 525  * realized widget. Because it is possible that somebody
 526  * can call get_colormap() or get_visual() and save the
 527  * result, these functions are probably only safe to
 528  * call in a widget's init() function.
 529  */
 530 void         gtk_widget_set_colormap    (GtkWidget      *widget,
 531                                          GdkColormap    *colormap);
 532
 533 gint         gtk_widget_get_events      (GtkWidget      *widget);
 534 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 535                                          gint           *x,
 536                                          gint           *y);
 537
 538 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
 539                                          GtkWidget      *ancestor);
 540
 541 /* Hide widget and return TRUE.
 542  */
 543 gint       gtk_widget_hide_on_delete    (GtkWidget      *widget);
 544
 545 /* Widget styles.
 546  */
 547 void       gtk_widget_set_style         (GtkWidget      *widget,
 548                                          GtkStyle       *style);
 549 void       gtk_widget_set_rc_style      (GtkWidget      *widget);
 550 void       gtk_widget_ensure_style      (GtkWidget      *widget);
 551 GtkStyle*  gtk_widget_get_style         (GtkWidget      *widget);
 552 void       gtk_widget_restore_default_style (GtkWidget  *widget);
 553
 554 void        gtk_widget_modify_style       (GtkWidget            *widget,
 555                                            GtkRcStyle           *style);
 556 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 557 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 558                                            GtkStateType          state,
 559                                            GdkColor             *color);
 560 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 561                                            GtkStateType          state,
 562                                            GdkColor             *color);
 563 void        gtk_widget_modify_text        (GtkWidget            *widget,
 564                                            GtkStateType          state,
 565                                            GdkColor             *color);
 566 void        gtk_widget_modify_base        (GtkWidget            *widget,
 567                                            GtkStateType          state,
 568                                            GdkColor             *color);
 569 void        gtk_widget_modify_font        (GtkWidget            *widget,
 570                                            PangoFontDescription *font_desc);
 571
 572 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 573 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 574 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 575                                                const gchar *text);
 576
 577 GdkPixbuf    *gtk_widget_render_icon          (GtkWidget   *widget,
 578                                                const gchar *stock_id,
 579                                                const gchar *size,
 580                                                const gchar *detail);
 581
 582 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 583  * the returned name is newly allocated.
 584  */
 585 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 586                                          const gchar    *name);
 587 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 588
 589 /* Descend recursively and set rc-style on all widgets without user styles */
 590 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 591
 592 /* Push/pop pairs, to change default values upon a widget's creation.
 593  * This will override the values that got set by the
 594  * gtk_widget_set_default_* () functions.
 595  */
 596 void         gtk_widget_push_style           (GtkStyle   *style);
 597 void         gtk_widget_push_colormap        (GdkColormap *cmap);
 598 void         gtk_widget_push_composite_child (void);
 599 void         gtk_widget_pop_composite_child  (void);
 600 void         gtk_widget_pop_style            (void);
 601 void         gtk_widget_pop_colormap         (void);
 602
 603 /* Set certain default values to be used at widget creation time.
 604  */
 605 void         gtk_widget_set_default_style    (GtkStyle    *style);
 606 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
 607 GtkStyle*    gtk_widget_get_default_style    (void);
 608 GdkColormap* gtk_widget_get_default_colormap (void);
 609 GdkVisual*   gtk_widget_get_default_visual   (void);
 610
 611 /* Functions for setting directionality for widgets
 612  */
 613
 614 void             gtk_widget_set_direction         (GtkWidget        *widget,
 615                                                    GtkTextDirection  dir);
 616 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 617
 618 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 619 GtkTextDirection gtk_widget_get_default_direction (void);
 620
 621 /* Counterpart to gdk_window_shape_combine_mask.
 622  */
 623 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
 624                                             GdkBitmap *shape_mask,
 625                                             gint       offset_x,
 626                                             gint       offset_y);
 627
 628 /* internal function */
 629 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 630
 631 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 632  * return newly alocated strings.
 633  */
 634 void         gtk_widget_path               (GtkWidget *widget,
 635                                             guint     *path_length,
 636                                             gchar    **path,
 637                                             gchar    **path_reversed);
 638 void         gtk_widget_class_path         (GtkWidget *widget,
 639                                             guint     *path_length,
 640                                             gchar    **path,
 641                                             gchar    **path_reversed);
 642
 643 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
 644 #  define gtk_widget_ref gtk_object_ref
 645 #  define gtk_widget_unref gtk_object_unref
 646 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
 647
 648
 649 #ifdef __cplusplus
 650 }
 651 #endif /* __cplusplus */
 652
 653
 654 #endif /* __GTK_WIDGET_H__ */