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   GTK_CAN_DEFAULT      = 1 << 13,
  57   GTK_HAS_DEFAULT      = 1 << 14,
  58   GTK_HAS_GRAB         = 1 << 15,
  59   GTK_RC_STYLE         = 1 << 16,
  60   GTK_COMPOSITE_CHILD  = 1 << 17,
  61   GTK_NO_REPARENT      = 1 << 18,
  62   GTK_APP_PAINTABLE    = 1 << 19,
  63   GTK_RECEIVES_DEFAULT = 1 << 20,
  64   GTK_DOUBLE_BUFFERED  = 1 << 21
  65 } GtkWidgetFlags;
  66
  67 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
  68  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
  69  */
  70 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
  71 #define GTK_WIDGET(widget)                (GTK_CHECK_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
  72 #define GTK_WIDGET_CLASS(klass)           (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
  73 #define GTK_IS_WIDGET(widget)             (GTK_CHECK_TYPE ((widget), GTK_TYPE_WIDGET))
  74 #define GTK_IS_WIDGET_CLASS(klass)        (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
  75 #define GTK_WIDGET_GET_CLASS(obj)         (GTK_CHECK_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
  76
  77 /* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
  78  */
  79 #define GTK_WIDGET_TYPE(wid)              (GTK_OBJECT_TYPE (wid))
  80 #define GTK_WIDGET_STATE(wid)             (GTK_WIDGET (wid)->state)
  81 #define GTK_WIDGET_SAVED_STATE(wid)       (GTK_WIDGET (wid)->saved_state)
  82
  83 /* Macros for extracting the widget flags from GtkWidget.
  84  */
  85 #define GTK_WIDGET_FLAGS(wid)             (GTK_OBJECT_FLAGS (wid))
  86 #define GTK_WIDGET_TOPLEVEL(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
  87 #define GTK_WIDGET_NO_WINDOW(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
  88 #define GTK_WIDGET_REALIZED(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
  89 #define GTK_WIDGET_MAPPED(wid)            ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
  90 #define GTK_WIDGET_VISIBLE(wid)           ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
  91 #define GTK_WIDGET_DRAWABLE(wid)          (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))
  92 #define GTK_WIDGET_SENSITIVE(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
  93 #define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
  94 #define GTK_WIDGET_IS_SENSITIVE(wid)      (GTK_WIDGET_SENSITIVE (wid) && \
  95                                            GTK_WIDGET_PARENT_SENSITIVE (wid))
  96 #define GTK_WIDGET_CAN_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
  97 #define GTK_WIDGET_HAS_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
  98 #define GTK_WIDGET_CAN_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
  99 #define GTK_WIDGET_HAS_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
 100 #define GTK_WIDGET_HAS_GRAB(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
 101 #define GTK_WIDGET_RC_STYLE(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
 102 #define GTK_WIDGET_COMPOSITE_CHILD(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
 103 #define GTK_WIDGET_APP_PAINTABLE(wid)     ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)
 104 #define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)
 105 #define GTK_WIDGET_DOUBLE_BUFFERED(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)
 106
 107 /* Macros for setting and clearing widget flags.
 108  */
 109 #define GTK_WIDGET_SET_FLAGS(wid,flag)    G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
 110 #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
 111
 112
 113
 114 typedef struct _GtkRequisition    GtkRequisition;
 115 typedef struct _GdkRectangle      GtkAllocation;
 116 typedef struct _GtkSelectionData GtkSelectionData;
 117 typedef struct _GtkWidgetClass    GtkWidgetClass;
 118 typedef struct _GtkWidgetAuxInfo  GtkWidgetAuxInfo;
 119 typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
 120
 121 typedef void (*GtkCallback) (GtkWidget *widget,
 122                              gpointer   data);
 123
 124 /* A requisition is a desired amount of space which a
 125  *  widget may request.
 126  */
 127 struct _GtkRequisition
 128 {
 129   gint width;
 130   gint height;
 131 };
 132
 133 /* The contents of a selection are returned in a GtkSelectionData
 134    structure. selection/target identify the request.
 135    type specifies the type of the return; if length < 0, and
 136    the data should be ignored. This structure has object semantics -
 137    no fields should be modified directly, they should not be created
 138    directly, and pointers to them should not be stored beyond the duration of
 139    a callback. (If the last is changed, we'll need to add reference
 140    counting.) The time field gives the timestamp at which the data was sent. */
 141
 142 struct _GtkSelectionData
 143 {
 144   GdkAtom selection;
 145   GdkAtom target;
 146   GdkAtom type;
 147   gint    format;
 148   guchar *data;
 149   gint    length;
 150 };
 151
 152 /* The widget is the base of the tree for displayable objects.
 153  *  (A displayable object is one which takes up some amount
 154  *  of screen real estate). It provides a common base and interface
 155  *  which actual widgets must adhere to.
 156  */
 157 struct _GtkWidget
 158 {
 159   /* The object structure needs to be the first
 160    *  element in the widget structure in order for
 161    *  the object mechanism to work correctly. This
 162    *  allows a GtkWidget pointer to be cast to a
 163    *  GtkObject pointer.
 164    */
 165   GtkObject object;
 166
 167   /* 16 bits of internally used private flags.
 168    * this will be packed into the same 4 byte alignment frame that
 169    * state and saved_state go. we therefore don't waste any new
 170    * space on this.
 171    */
 172   guint16 private_flags;
 173
 174   /* The state of the widget. There are actually only
 175    *  5 widget states (defined in "gtkenums.h").
 176    */
 177   guint8 state;
 178
 179   /* The saved state of the widget. When a widgets state
 180    *  is changed to GTK_STATE_INSENSITIVE via
 181    *  "gtk_widget_set_state" or "gtk_widget_set_sensitive"
 182    *  the old state is kept around in this field. The state
 183    *  will be restored once the widget gets sensitive again.
 184    */
 185   guint8 saved_state;
 186
 187   /* The widgets name. If the widget does not have a name
 188    *  (the name is NULL), then its name (as returned by
 189    *  "gtk_widget_get_name") is its classes name.
 190    * Among other things, the widget name is used to determine
 191    *  the style to use for a widget.
 192    */
 193   gchar *name;
 194
 195   /* The style for the widget. The style contains the
 196    *  colors the widget should be drawn in for each state
 197    *  along with graphics contexts used to draw with and
 198    *  the font to use for text.
 199    */
 200   GtkStyle *style;
 201
 202   /* The widgets desired size.
 203    */
 204   GtkRequisition requisition;
 205
 206   /* The widgets allocated size.
 207    */
 208   GtkAllocation allocation;
 209
 210   /* The widgets window or its parent window if it does
 211    *  not have a window. (Which will be indicated by the
 212    *  GTK_NO_WINDOW flag being set).
 213    */
 214   GdkWindow *window;
 215
 216   /* The widgets parent.
 217    */
 218   GtkWidget *parent;
 219 };
 220
 221 struct _GtkWidgetClass
 222 {
 223   /* The object class structure needs to be the first
 224    *  element in the widget class structure in order for
 225    *  the class mechanism to work correctly. This allows a
 226    *  GtkWidgetClass pointer to be cast to a GtkObjectClass
 227    *  pointer.
 228    */
 229   GtkObjectClass parent_class;
 230
 231   /* The signal to emit when a widget of this class is activated,
 232    * gtk_widget_activate() handles the emission.
 233    * Implementation of this signal is optional.
 234    */
 235   guint activate_signal;
 236
 237   /* This signal is emitted  when a widget of this class is added
 238    * to a scrolling aware parent, gtk_widget_set_scroll_adjustments()
 239    * handles the emission.
 240    * Implementation of this signal is optional.
 241    */
 242   guint set_scroll_adjustments_signal;
 243
 244   /* basics */
 245   void (* show)                (GtkWidget        *widget);
 246   void (* show_all)            (GtkWidget        *widget);
 247   void (* hide)                (GtkWidget        *widget);
 248   void (* hide_all)            (GtkWidget        *widget);
 249   void (* map)                 (GtkWidget        *widget);
 250   void (* unmap)               (GtkWidget        *widget);
 251   void (* realize)             (GtkWidget        *widget);
 252   void (* unrealize)           (GtkWidget        *widget);
 253   void (* draw)                (GtkWidget        *widget,
 254                                 GdkRectangle     *area);
 255   void (* draw_focus)          (GtkWidget        *widget);
 256   void (* draw_default)        (GtkWidget        *widget);
 257   void (* size_request)        (GtkWidget        *widget,
 258                                 GtkRequisition   *requisition);
 259   void (* size_allocate)       (GtkWidget        *widget,
 260                                 GtkAllocation    *allocation);
 261   void (* state_changed)       (GtkWidget        *widget,
 262                                 GtkStateType      previous_state);
 263   void (* parent_set)          (GtkWidget        *widget,
 264                                 GtkWidget        *previous_parent);
 265   void (* style_set)           (GtkWidget        *widget,
 266                                 GtkStyle         *previous_style);
 267   void (* direction_changed)   (GtkWidget        *widget,
 268                                 GtkTextDirection  previous_direction);
 269
 270   /* accelerators */
 271   gint (* add_accelerator)     (GtkWidget      *widget,
 272                                 guint           accel_signal_id,
 273                                 GtkAccelGroup  *accel_group,
 274                                 guint           accel_key,
 275                                 GdkModifierType accel_mods,
 276                                 GtkAccelFlags   accel_flags);
 277   void (* remove_accelerator)  (GtkWidget      *widget,
 278                                 GtkAccelGroup  *accel_group,
 279                                 guint           accel_key,
 280                                 GdkModifierType accel_mods);
 281
 282   /* explicit focus */
 283   void (* grab_focus)          (GtkWidget      *widget);
 284
 285   /* events */
 286   gint (* event)                   (GtkWidget          *widget,
 287                                     GdkEvent           *event);
 288   gint (* button_press_event)      (GtkWidget          *widget,
 289                                     GdkEventButton     *event);
 290   gint (* button_release_event)    (GtkWidget          *widget,
 291                                     GdkEventButton     *event);
 292   gint (* scroll_event)            (GtkWidget          *widget,
 293                                     GdkEventScroll     *event);
 294   gint (* motion_notify_event)     (GtkWidget          *widget,
 295                                     GdkEventMotion     *event);
 296   gint (* delete_event)            (GtkWidget          *widget,
 297                                     GdkEventAny        *event);
 298   gint (* destroy_event)           (GtkWidget          *widget,
 299                                     GdkEventAny        *event);
 300   gint (* expose_event)            (GtkWidget          *widget,
 301                                     GdkEventExpose     *event);
 302   gint (* key_press_event)         (GtkWidget          *widget,
 303                                     GdkEventKey        *event);
 304   gint (* key_release_event)       (GtkWidget          *widget,
 305                                     GdkEventKey        *event);
 306   gint (* enter_notify_event)      (GtkWidget          *widget,
 307                                     GdkEventCrossing   *event);
 308   gint (* leave_notify_event)      (GtkWidget          *widget,
 309                                     GdkEventCrossing   *event);
 310   gint (* configure_event)         (GtkWidget          *widget,
 311                                     GdkEventConfigure  *event);
 312   gint (* focus_in_event)          (GtkWidget          *widget,
 313                                     GdkEventFocus      *event);
 314   gint (* focus_out_event)         (GtkWidget          *widget,
 315                                     GdkEventFocus      *event);
 316   gint (* map_event)               (GtkWidget          *widget,
 317                                     GdkEventAny        *event);
 318   gint (* unmap_event)             (GtkWidget          *widget,
 319                                     GdkEventAny        *event);
 320   gint (* property_notify_event)   (GtkWidget          *widget,
 321                                     GdkEventProperty   *event);
 322   gint (* selection_clear_event)   (GtkWidget          *widget,
 323                                     GdkEventSelection  *event);
 324   gint (* selection_request_event) (GtkWidget          *widget,
 325                                     GdkEventSelection  *event);
 326   gint (* selection_notify_event)  (GtkWidget          *widget,
 327                                     GdkEventSelection  *event);
 328   gint (* proximity_in_event)      (GtkWidget          *widget,
 329                                     GdkEventProximity  *event);
 330   gint (* proximity_out_event)     (GtkWidget          *widget,
 331                                     GdkEventProximity  *event);
 332   gint (* visibility_notify_event)  (GtkWidget         *widget,
 333                                      GdkEventVisibility *event);
 334   gint (* client_event)            (GtkWidget          *widget,
 335                                     GdkEventClient     *event);
 336   gint (* no_expose_event)         (GtkWidget          *widget,
 337                                     GdkEventAny        *event);
 338
 339   /* selection */
 340   void (* selection_get)           (GtkWidget          *widget,
 341                                     GtkSelectionData   *selection_data,
 342                                     guint               info,
 343                                     guint               time);
 344   void (* selection_received)      (GtkWidget          *widget,
 345                                     GtkSelectionData   *selection_data,
 346                                     guint               time);
 347
 348   /* Source side drag signals */
 349   void (* drag_begin)              (GtkWidget          *widget,
 350                                     GdkDragContext     *context);
 351   void (* drag_end)                (GtkWidget          *widget,
 352                                     GdkDragContext     *context);
 353   void (* drag_data_get)           (GtkWidget          *widget,
 354                                     GdkDragContext     *context,
 355                                     GtkSelectionData   *selection_data,
 356                                     guint               info,
 357                                     guint               time);
 358   void (* drag_data_delete)        (GtkWidget          *widget,
 359                                     GdkDragContext     *context);
 360
 361   /* Target side drag signals */
 362   void (* drag_leave)              (GtkWidget          *widget,
 363                                     GdkDragContext     *context,
 364                                     guint               time);
 365   gboolean (* drag_motion)         (GtkWidget          *widget,
 366                                     GdkDragContext     *context,
 367                                     gint                x,
 368                                     gint                y,
 369                                     guint               time);
 370   gboolean (* drag_drop)           (GtkWidget          *widget,
 371                                     GdkDragContext     *context,
 372                                     gint                x,
 373                                     gint                y,
 374                                     guint               time);
 375   void (* drag_data_received)      (GtkWidget          *widget,
 376                                     GdkDragContext     *context,
 377                                     gint                x,
 378                                     gint                y,
 379                                     GtkSelectionData   *selection_data,
 380                                     guint               info,
 381                                     guint               time);
 382
 383   /* action signals */
 384   void (* debug_msg)               (GtkWidget          *widget,
 385                                     const gchar        *string);
 386
 387   /* Padding for future expandsion */
 388   GtkFunction pad1;
 389   GtkFunction pad2;
 390   GtkFunction pad3;
 391   GtkFunction pad4;
 392 };
 393
 394 struct _GtkWidgetAuxInfo
 395 {
 396   gint16  x;
 397   gint16  y;
 398   gint16 width;
 399   gint16 height;
 400 };
 401
 402 struct _GtkWidgetShapeInfo
 403 {
 404   gint16     offset_x;
 405   gint16     offset_y;
 406   GdkBitmap *shape_mask;
 407 };
 408
 409 GtkType    gtk_widget_get_type            (void) G_GNUC_CONST;
 410 GtkWidget* gtk_widget_new                 (GtkType              type,
 411                                            const gchar         *first_arg_name,
 412                                            ...);
 413 GtkWidget* gtk_widget_newv                (GtkType              type,
 414                                            guint                nargs,
 415                                            GtkArg              *args);
 416 GtkWidget* gtk_widget_ref                 (GtkWidget           *widget);
 417 void       gtk_widget_unref               (GtkWidget           *widget);
 418 void       gtk_widget_destroy             (GtkWidget           *widget);
 419 void       gtk_widget_destroyed           (GtkWidget           *widget,
 420                                            GtkWidget          **widget_pointer);
 421 void       gtk_widget_get                 (GtkWidget           *widget,
 422                                            GtkArg              *arg);
 423 void       gtk_widget_getv                (GtkWidget           *widget,
 424                                            guint                nargs,
 425                                            GtkArg              *args);
 426 void       gtk_widget_set                 (GtkWidget           *widget,
 427                                            const gchar         *first_arg_name,
 428                                            ...);
 429 void       gtk_widget_setv                (GtkWidget           *widget,
 430                                            guint                nargs,
 431                                            GtkArg              *args);
 432 void       gtk_widget_unparent            (GtkWidget           *widget);
 433 void       gtk_widget_show                (GtkWidget           *widget);
 434 void       gtk_widget_show_now            (GtkWidget           *widget);
 435 void       gtk_widget_hide                (GtkWidget           *widget);
 436 void       gtk_widget_show_all            (GtkWidget           *widget);
 437 void       gtk_widget_hide_all            (GtkWidget           *widget);
 438 void       gtk_widget_map                 (GtkWidget           *widget);
 439 void       gtk_widget_unmap               (GtkWidget           *widget);
 440 void       gtk_widget_realize             (GtkWidget           *widget);
 441 void       gtk_widget_unrealize           (GtkWidget           *widget);
 442
 443 /* Queuing draws */
 444 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 445 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 446                                            gint                 x,
 447                                            gint                 y,
 448                                            gint                 width,
 449                                            gint                 height);
 450 void       gtk_widget_queue_clear         (GtkWidget           *widget);
 451 void       gtk_widget_queue_clear_area    (GtkWidget           *widget,
 452                                            gint                 x,
 453                                            gint                 y,
 454                                            gint                 width,
 455                                            gint                 height);
 456
 457
 458 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 459 void       gtk_widget_draw                (GtkWidget           *widget,
 460                                            GdkRectangle        *area);
 461 void       gtk_widget_draw_focus          (GtkWidget           *widget);
 462 void       gtk_widget_draw_default        (GtkWidget           *widget);
 463 void       gtk_widget_size_request        (GtkWidget           *widget,
 464                                            GtkRequisition      *requisition);
 465 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 466                                            GtkAllocation       *allocation);
 467 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 468                                              GtkRequisition    *requisition);
 469 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 470                                            const gchar         *accel_signal,
 471                                            GtkAccelGroup       *accel_group,
 472                                            guint                accel_key,
 473                                            guint                accel_mods,
 474                                            GtkAccelFlags        accel_flags);
 475 void       gtk_widget_remove_accelerator  (GtkWidget           *widget,
 476                                            GtkAccelGroup       *accel_group,
 477                                            guint                accel_key,
 478                                            guint                accel_mods);
 479 void       gtk_widget_remove_accelerators (GtkWidget           *widget,
 480                                            const gchar         *accel_signal,
 481                                            gboolean             visible_only);
 482 guint      gtk_widget_accelerator_signal  (GtkWidget           *widget,
 483                                            GtkAccelGroup       *accel_group,
 484                                            guint                accel_key,
 485                                            guint                accel_mods);
 486 void       gtk_widget_lock_accelerators   (GtkWidget           *widget);
 487 void       gtk_widget_unlock_accelerators (GtkWidget           *widget);
 488 gboolean   gtk_widget_accelerators_locked (GtkWidget           *widget);
 489 gint       gtk_widget_event               (GtkWidget           *widget,
 490                                            GdkEvent            *event);
 491
 492 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 493 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 494                                               GtkAdjustment    *hadjustment,
 495                                               GtkAdjustment    *vadjustment);
 496
 497 void       gtk_widget_reparent            (GtkWidget           *widget,
 498                                            GtkWidget           *new_parent);
 499 void       gtk_widget_popup               (GtkWidget           *widget,
 500                                            gint                 x,
 501                                            gint                 y);
 502 gint       gtk_widget_intersect           (GtkWidget           *widget,
 503                                            GdkRectangle        *area,
 504                                            GdkRectangle        *intersection);
 505
 506 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 507 void       gtk_widget_grab_default        (GtkWidget           *widget);
 508
 509 void       gtk_widget_set_name            (GtkWidget           *widget,
 510                                            const gchar         *name);
 511 gchar*     gtk_widget_get_name            (GtkWidget           *widget);
 512 void       gtk_widget_set_state           (GtkWidget           *widget,
 513                                            GtkStateType         state);
 514 void       gtk_widget_set_sensitive       (GtkWidget           *widget,
 515                                            gboolean             sensitive);
 516 void       gtk_widget_set_app_paintable   (GtkWidget           *widget,
 517                                            gboolean             app_paintable);
 518 void       gtk_widget_set_double_buffered (GtkWidget           *widget,
 519                                            gboolean             double_buffered);
 520 void       gtk_widget_set_parent          (GtkWidget           *widget,
 521                                            GtkWidget           *parent);
 522 void       gtk_widget_set_parent_window   (GtkWidget           *widget,
 523                                            GdkWindow           *parent_window);
 524 GdkWindow *gtk_widget_get_parent_window   (GtkWidget           *widget);
 525 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 526                                            gint                 x,
 527                                            gint                 y);
 528 void       gtk_widget_set_usize           (GtkWidget           *widget,
 529                                            gint                 width,
 530                                            gint                 height);
 531 void       gtk_widget_set_events          (GtkWidget           *widget,
 532                                            gint                 events);
 533 void       gtk_widget_add_events          (GtkWidget           *widget,
 534                                            gint                 events);
 535 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 536                                             GdkExtensionMode    mode);
 537
 538 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 539 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 540 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 541                                          GtkType        widget_type);
 542 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
 543 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 544
 545 /* The following functions must not be called on an already
 546  * realized widget. Because it is possible that somebody
 547  * can call get_colormap() or get_visual() and save the
 548  * result, these functions are probably only safe to
 549  * call in a widget's init() function.
 550  */
 551 void         gtk_widget_set_colormap    (GtkWidget      *widget,
 552                                          GdkColormap    *colormap);
 553
 554 gint         gtk_widget_get_events      (GtkWidget      *widget);
 555 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 556                                          gint           *x,
 557                                          gint           *y);
 558
 559 gint         gtk_widget_is_ancestor     (GtkWidget      *widget,
 560                                          GtkWidget      *ancestor);
 561
 562 /* Hide widget and return TRUE.
 563  */
 564 gint       gtk_widget_hide_on_delete    (GtkWidget      *widget);
 565
 566 /* Widget styles.
 567  */
 568 void       gtk_widget_set_style         (GtkWidget      *widget,
 569                                          GtkStyle       *style);
 570 void       gtk_widget_set_rc_style      (GtkWidget      *widget);
 571 void       gtk_widget_ensure_style      (GtkWidget      *widget);
 572 GtkStyle*  gtk_widget_get_style         (GtkWidget      *widget);
 573 void       gtk_widget_restore_default_style (GtkWidget  *widget);
 574
 575 void        gtk_widget_modify_style       (GtkWidget            *widget,
 576                                            GtkRcStyle           *style);
 577 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
 578 void        gtk_widget_modify_fg          (GtkWidget            *widget,
 579                                            GtkStateType          state,
 580                                            GdkColor             *color);
 581 void        gtk_widget_modify_bg          (GtkWidget            *widget,
 582                                            GtkStateType          state,
 583                                            GdkColor             *color);
 584 void        gtk_widget_modify_text        (GtkWidget            *widget,
 585                                            GtkStateType          state,
 586                                            GdkColor             *color);
 587 void        gtk_widget_modify_base        (GtkWidget            *widget,
 588                                            GtkStateType          state,
 589                                            GdkColor             *color);
 590 void        gtk_widget_modify_font        (GtkWidget            *widget,
 591                                            PangoFontDescription *font_desc);
 592
 593 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
 594 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
 595 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
 596                                                const gchar *text);
 597
 598 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 599  * the returned name is newly allocated.
 600  */
 601 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 602                                          const gchar    *name);
 603 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 604
 605 /* Descend recursively and set rc-style on all widgets without user styles */
 606 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 607
 608 /* Push/pop pairs, to change default values upon a widget's creation.
 609  * This will override the values that got set by the
 610  * gtk_widget_set_default_* () functions.
 611  */
 612 void         gtk_widget_push_style           (GtkStyle   *style);
 613 void         gtk_widget_push_colormap        (GdkColormap *cmap);
 614 void         gtk_widget_push_composite_child (void);
 615 void         gtk_widget_pop_composite_child  (void);
 616 void         gtk_widget_pop_style            (void);
 617 void         gtk_widget_pop_colormap         (void);
 618
 619 /* Set certain default values to be used at widget creation time.
 620  */
 621 void         gtk_widget_set_default_style    (GtkStyle    *style);
 622 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
 623 GtkStyle*    gtk_widget_get_default_style    (void);
 624 GdkColormap* gtk_widget_get_default_colormap (void);
 625 GdkVisual*   gtk_widget_get_default_visual   (void);
 626
 627 /* Functions for setting directionality for widgets
 628  */
 629
 630 void             gtk_widget_set_direction         (GtkWidget        *widget,
 631                                                    GtkTextDirection  dir);
 632 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
 633
 634 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
 635 GtkTextDirection gtk_widget_get_default_direction (void);
 636
 637 /* Counterpart to gdk_window_shape_combine_mask.
 638  */
 639 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
 640                                             GdkBitmap *shape_mask,
 641                                             gint       offset_x,
 642                                             gint       offset_y);
 643
 644 /* internal function */
 645 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 646
 647 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 648  * return newly alocated strings.
 649  */
 650 void         gtk_widget_path               (GtkWidget *widget,
 651                                             guint     *path_length,
 652                                             gchar    **path,
 653                                             gchar    **path_reversed);
 654 void         gtk_widget_class_path         (GtkWidget *widget,
 655                                             guint     *path_length,
 656                                             gchar    **path,
 657                                             gchar    **path_reversed);
 658
 659 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
 660 #  define gtk_widget_ref gtk_object_ref
 661 #  define gtk_widget_unref gtk_object_unref
 662 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
 663
 664
 665
 666 #ifdef __cplusplus
 667 }
 668 #endif /* __cplusplus */
 669
 670
 671 #endif /* __GTK_WIDGET_H__ */