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 Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 #ifndef __GTK_WIDGET_H__
  20 #define __GTK_WIDGET_H__
  21
  22 #include <gdk/gdk.h>
  23 #include <gtk/gtkaccelgroup.h>
  24 #include <gtk/gtkobject.h>
  25 #include <gtk/gtkadjustment.h>
  26 #include <gtk/gtkstyle.h>
  27
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif /* __cplusplus */
  32
  33
  34 /* The flags that are used by GtkWidget on top of the
  35  * flags field of GtkObject.
  36  */
  37 typedef enum
  38 {
  39   GTK_TOPLEVEL         = 1 << 4,
  40   GTK_NO_WINDOW        = 1 << 5,
  41   GTK_REALIZED         = 1 << 6,
  42   GTK_MAPPED           = 1 << 7,
  43   GTK_VISIBLE          = 1 << 8,
  44   GTK_SENSITIVE        = 1 << 9,
  45   GTK_PARENT_SENSITIVE = 1 << 10,
  46   GTK_CAN_FOCUS        = 1 << 11,
  47   GTK_HAS_FOCUS        = 1 << 12,
  48   GTK_CAN_DEFAULT      = 1 << 13,
  49   GTK_HAS_DEFAULT      = 1 << 14,
  50   GTK_HAS_GRAB         = 1 << 15,
  51   GTK_RC_STYLE         = 1 << 16,
  52   GTK_COMPOSITE_CHILD  = 1 << 17,
  53   GTK_NO_REPARENT      = 1 << 18,
  54   GTK_APP_PAINTABLE    = 1 << 19
  55 } GtkWidgetFlags;
  56
  57 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
  58  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
  59  */
  60 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
  61 #define GTK_WIDGET(widget)                (GTK_CHECK_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
  62 #define GTK_WIDGET_CLASS(klass)           (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
  63 #define GTK_IS_WIDGET(widget)             (GTK_CHECK_TYPE ((widget), GTK_TYPE_WIDGET))
  64 #define GTK_IS_WIDGET_CLASS(klass)        (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
  65
  66 /* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
  67  */
  68 #define GTK_WIDGET_TYPE(wid)              (GTK_OBJECT_TYPE (wid))
  69 #define GTK_WIDGET_STATE(wid)             (GTK_WIDGET (wid)->state)
  70 #define GTK_WIDGET_SAVED_STATE(wid)       (GTK_WIDGET (wid)->saved_state)
  71
  72 /* Macros for extracting the widget flags from GtkWidget.
  73  */
  74 #define GTK_WIDGET_FLAGS(wid)             (GTK_OBJECT_FLAGS (wid))
  75 #define GTK_WIDGET_TOPLEVEL(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
  76 #define GTK_WIDGET_NO_WINDOW(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
  77 #define GTK_WIDGET_REALIZED(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
  78 #define GTK_WIDGET_MAPPED(wid)            ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
  79 #define GTK_WIDGET_VISIBLE(wid)           ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
  80 #define GTK_WIDGET_DRAWABLE(wid)          (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))
  81 #define GTK_WIDGET_SENSITIVE(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
  82 #define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
  83 #define GTK_WIDGET_IS_SENSITIVE(wid)      (GTK_WIDGET_SENSITIVE (wid) && \
  84                                            GTK_WIDGET_PARENT_SENSITIVE (wid))
  85 #define GTK_WIDGET_CAN_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
  86 #define GTK_WIDGET_HAS_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
  87 #define GTK_WIDGET_CAN_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
  88 #define GTK_WIDGET_HAS_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
  89 #define GTK_WIDGET_HAS_GRAB(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
  90 #define GTK_WIDGET_RC_STYLE(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
  91 #define GTK_WIDGET_COMPOSITE_CHILD(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
  92 #define GTK_WIDGET_APP_PAINTABLE(wid)     ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)
  93
  94 /* Macros for setting and clearing widget flags.
  95  */
  96 #define GTK_WIDGET_SET_FLAGS(wid,flag)    G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
  97 #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
  98
  99
 100
 101 typedef struct _GtkRequisition    GtkRequisition;
 102 typedef struct _GtkAllocation     GtkAllocation;
 103 typedef struct _GtkSelectionData GtkSelectionData;
 104 typedef struct _GtkWidgetClass    GtkWidgetClass;
 105 typedef struct _GtkWidgetAuxInfo  GtkWidgetAuxInfo;
 106 typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
 107
 108 typedef void (*GtkCallback) (GtkWidget *widget,
 109                              gpointer   data);
 110
 111 /* A requisition is a desired amount of space which a
 112  *  widget may request.
 113  */
 114 struct _GtkRequisition
 115 {
 116   gint16 width;
 117   gint16 height;
 118 };
 119
 120 /* An allocation is a size and position. Where a widget
 121  *  can ask for a desired size, it is actually given
 122  *  this amount of space at the specified position.
 123  */
 124 struct _GtkAllocation
 125 {
 126   gint16 x;
 127   gint16 y;
 128   guint16 width;
 129   guint16 height;
 130 };
 131
 132 /* The contents of a selection are returned in a GtkSelectionData
 133    structure. selection/target identify the request.
 134    type specifies the type of the return; if length < 0, and
 135    the data should be ignored. This structure has object semantics -
 136    no fields should be modified directly, they should not be created
 137    directly, and pointers to them should not be stored beyond the duration of
 138    a callback. (If the last is changed, we'll need to add reference
 139    counting.) The time field gives the timestamp at which the data was sent. */
 140
 141 struct _GtkSelectionData
 142 {
 143   GdkAtom selection;
 144   GdkAtom target;
 145   GdkAtom type;
 146   gint    format;
 147   guchar *data;
 148   gint    length;
 149 };
 150
 151 /* The widget is the base of the tree for displayable objects.
 152  *  (A displayable object is one which takes up some amount
 153  *  of screen real estate). It provides a common base and interface
 154  *  which actual widgets must adhere to.
 155  */
 156 struct _GtkWidget
 157 {
 158   /* The object structure needs to be the first
 159    *  element in the widget structure in order for
 160    *  the object mechanism to work correctly. This
 161    *  allows a GtkWidget pointer to be cast to a
 162    *  GtkObject pointer.
 163    */
 164   GtkObject object;
 165
 166   /* 16 bits of internally used private flags.
 167    * this will be packed into the same 4 byte alignment frame that
 168    * state and saved_state go. we therefore don't waste any new
 169    * space on this.
 170    */
 171   guint16 private_flags;
 172
 173   /* The state of the widget. There are actually only
 174    *  5 widget states (defined in "gtkenums.h").
 175    */
 176   guint8 state;
 177
 178   /* The saved state of the widget. When a widgets state
 179    *  is changed to GTK_STATE_INSENSITIVE via
 180    *  "gtk_widget_set_state" or "gtk_widget_set_sensitive"
 181    *  the old state is kept around in this field. The state
 182    *  will be restored once the widget gets sensitive again.
 183    */
 184   guint8 saved_state;
 185
 186   /* The widgets name. If the widget does not have a name
 187    *  (the name is NULL), then its name (as returned by
 188    *  "gtk_widget_get_name") is its classes name.
 189    * Among other things, the widget name is used to determine
 190    *  the style to use for a widget.
 191    */
 192   gchar *name;
 193
 194   /* The style for the widget. The style contains the
 195    *  colors the widget should be drawn in for each state
 196    *  along with graphics contexts used to draw with and
 197    *  the font to use for text.
 198    */
 199   GtkStyle *style;
 200
 201   /* The widgets desired size.
 202    */
 203   GtkRequisition requisition;
 204
 205   /* The widgets allocated size.
 206    */
 207   GtkAllocation allocation;
 208
 209   /* The widgets window or its parent window if it does
 210    *  not have a window. (Which will be indicated by the
 211    *  GTK_NO_WINDOW flag being set).
 212    */
 213   GdkWindow *window;
 214
 215   /* The widgets parent.
 216    */
 217   GtkWidget *parent;
 218 };
 219
 220 struct _GtkWidgetClass
 221 {
 222   /* The object class structure needs to be the first
 223    *  element in the widget class structure in order for
 224    *  the class mechanism to work correctly. This allows a
 225    *  GtkWidgetClass pointer to be cast to a GtkObjectClass
 226    *  pointer.
 227    */
 228   GtkObjectClass parent_class;
 229
 230   /* The signal to emit when a widget of this class is activated,
 231    * gtk_widget_activate() handles the emission.
 232    * Implementation of this signal is optional.
 233    */
 234   guint activate_signal;
 235
 236   /* This signal is emitted  when a widget of this class is added
 237    * to a scrolling aware parent, gtk_widget_set_scroll_adjustments()
 238    * handles the emission.
 239    * Implementation of this signal is optional.
 240    */
 241   guint set_scroll_adjustments_signal;
 242
 243   /* basics */
 244   void (* show)                (GtkWidget      *widget);
 245   void (* show_all)            (GtkWidget      *widget);
 246   void (* hide)                (GtkWidget      *widget);
 247   void (* hide_all)            (GtkWidget      *widget);
 248   void (* map)                 (GtkWidget      *widget);
 249   void (* unmap)               (GtkWidget      *widget);
 250   void (* realize)             (GtkWidget      *widget);
 251   void (* unrealize)           (GtkWidget      *widget);
 252   void (* draw)                (GtkWidget      *widget,
 253                                 GdkRectangle   *area);
 254   void (* draw_focus)          (GtkWidget      *widget);
 255   void (* draw_default)        (GtkWidget      *widget);
 256   void (* size_request)        (GtkWidget      *widget,
 257                                 GtkRequisition *requisition);
 258   void (* size_allocate)       (GtkWidget      *widget,
 259                                 GtkAllocation  *allocation);
 260   void (* state_changed)       (GtkWidget      *widget,
 261                                 GtkStateType    previous_state);
 262   void (* parent_set)          (GtkWidget      *widget,
 263                                 GtkWidget      *previous_parent);
 264   void (* style_set)           (GtkWidget      *widget,
 265                                 GtkStyle       *previous_style);
 266
 267   /* accelerators */
 268   gint (* add_accelerator)     (GtkWidget      *widget,
 269                                 guint           accel_signal_id,
 270                                 GtkAccelGroup  *accel_group,
 271                                 guint           accel_key,
 272                                 GdkModifierType accel_mods,
 273                                 GtkAccelFlags   accel_flags);
 274   void (* remove_accelerator)  (GtkWidget      *widget,
 275                                 GtkAccelGroup  *accel_group,
 276                                 guint           accel_key,
 277                                 GdkModifierType accel_mods);
 278
 279   /* explicit focus */
 280   void (* grab_focus)          (GtkWidget      *widget);
 281
 282   /* events */
 283   gint (* event)                   (GtkWidget          *widget,
 284                                     GdkEvent           *event);
 285   gint (* button_press_event)      (GtkWidget          *widget,
 286                                     GdkEventButton     *event);
 287   gint (* button_release_event)    (GtkWidget          *widget,
 288                                     GdkEventButton     *event);
 289   gint (* motion_notify_event)     (GtkWidget          *widget,
 290                                     GdkEventMotion     *event);
 291   gint (* delete_event)            (GtkWidget          *widget,
 292                                     GdkEventAny        *event);
 293   gint (* destroy_event)           (GtkWidget          *widget,
 294                                     GdkEventAny        *event);
 295   gint (* expose_event)            (GtkWidget          *widget,
 296                                     GdkEventExpose     *event);
 297   gint (* key_press_event)         (GtkWidget          *widget,
 298                                     GdkEventKey        *event);
 299   gint (* key_release_event)       (GtkWidget          *widget,
 300                                     GdkEventKey        *event);
 301   gint (* enter_notify_event)      (GtkWidget          *widget,
 302                                     GdkEventCrossing   *event);
 303   gint (* leave_notify_event)      (GtkWidget          *widget,
 304                                     GdkEventCrossing   *event);
 305   gint (* configure_event)         (GtkWidget          *widget,
 306                                     GdkEventConfigure  *event);
 307   gint (* focus_in_event)          (GtkWidget          *widget,
 308                                     GdkEventFocus      *event);
 309   gint (* focus_out_event)         (GtkWidget          *widget,
 310                                     GdkEventFocus      *event);
 311   gint (* map_event)               (GtkWidget          *widget,
 312                                     GdkEventAny        *event);
 313   gint (* unmap_event)             (GtkWidget          *widget,
 314                                     GdkEventAny        *event);
 315   gint (* property_notify_event)   (GtkWidget          *widget,
 316                                     GdkEventProperty   *event);
 317   gint (* selection_clear_event)   (GtkWidget          *widget,
 318                                     GdkEventSelection  *event);
 319   gint (* selection_request_event) (GtkWidget          *widget,
 320                                     GdkEventSelection  *event);
 321   gint (* selection_notify_event)  (GtkWidget          *widget,
 322                                     GdkEventSelection  *event);
 323   gint (* proximity_in_event)      (GtkWidget          *widget,
 324                                     GdkEventProximity  *event);
 325   gint (* proximity_out_event)     (GtkWidget          *widget,
 326                                     GdkEventProximity  *event);
 327   gint (* visibility_notify_event)  (GtkWidget         *widget,
 328                                      GdkEventVisibility *event);
 329   gint (* client_event)            (GtkWidget          *widget,
 330                                     GdkEventClient     *event);
 331   gint (* no_expose_event)         (GtkWidget          *widget,
 332                                     GdkEventAny        *event);
 333
 334   /* selection */
 335   void (* selection_get)           (GtkWidget          *widget,
 336                                     GtkSelectionData   *selection_data,
 337                                     guint               info,
 338                                     guint               time);
 339   void (* selection_received)      (GtkWidget          *widget,
 340                                     GtkSelectionData   *selection_data,
 341                                     guint               time);
 342
 343   /* Source side drag signals */
 344   void (* drag_begin)              (GtkWidget          *widget,
 345                                     GdkDragContext     *context);
 346   void (* drag_end)                (GtkWidget          *widget,
 347                                     GdkDragContext     *context);
 348   void (* drag_data_get)           (GtkWidget          *widget,
 349                                     GdkDragContext     *context,
 350                                     GtkSelectionData   *selection_data,
 351                                     guint               info,
 352                                     guint32             time);
 353   void (* drag_data_delete)        (GtkWidget          *widget,
 354                                     GdkDragContext     *context);
 355
 356   /* Target side drag signals */
 357   void (* drag_leave)              (GtkWidget          *widget,
 358                                     GdkDragContext     *context,
 359                                     guint               time);
 360   gboolean (* drag_motion)         (GtkWidget          *widget,
 361                                     GdkDragContext     *context,
 362                                     gint                x,
 363                                     gint                y,
 364                                     guint               time);
 365   gboolean (* drag_drop)           (GtkWidget          *widget,
 366                                     GdkDragContext     *context,
 367                                     gint                x,
 368                                     gint                y,
 369                                     guint               time);
 370   void (* drag_data_received)      (GtkWidget          *widget,
 371                                     GdkDragContext     *context,
 372                                     gint                x,
 373                                     gint                y,
 374                                     GtkSelectionData   *selection_data,
 375                                     guint               info,
 376                                     guint32             time);
 377
 378   /* action signals */
 379   void (* debug_msg)               (GtkWidget          *widget,
 380                                     const gchar        *string);
 381 };
 382
 383 struct _GtkWidgetAuxInfo
 384 {
 385   gint16  x;
 386   gint16  y;
 387   gint16 width;
 388   gint16 height;
 389 };
 390
 391 struct _GtkWidgetShapeInfo
 392 {
 393   gint16     offset_x;
 394   gint16     offset_y;
 395   GdkBitmap *shape_mask;
 396 };
 397
 398
 399 GtkType    gtk_widget_get_type            (void);
 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 void       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_add_accelerator     (GtkWidget           *widget,
 458                                            const gchar         *accel_signal,
 459                                            GtkAccelGroup       *accel_group,
 460                                            guint                accel_key,
 461                                            guint                accel_mods,
 462                                            GtkAccelFlags        accel_flags);
 463 void       gtk_widget_remove_accelerator  (GtkWidget           *widget,
 464                                            GtkAccelGroup       *accel_group,
 465                                            guint                accel_key,
 466                                            guint                accel_mods);
 467 void       gtk_widget_remove_accelerators (GtkWidget           *widget,
 468                                            const gchar         *accel_signal,
 469                                            gboolean             visible_only);
 470 guint      gtk_widget_accelerator_signal  (GtkWidget           *widget,
 471                                            GtkAccelGroup       *accel_group,
 472                                            guint                accel_key,
 473                                            guint                accel_mods);
 474 void       gtk_widget_lock_accelerators   (GtkWidget           *widget);
 475 void       gtk_widget_unlock_accelerators (GtkWidget           *widget);
 476 gint       gtk_widget_event               (GtkWidget           *widget,
 477                                            GdkEvent            *event);
 478
 479 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 480 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 481                                               GtkAdjustment    *hadjustment,
 482                                               GtkAdjustment    *vadjustment);
 483
 484 void       gtk_widget_reparent            (GtkWidget           *widget,
 485                                            GtkWidget           *new_parent);
 486 void       gtk_widget_popup               (GtkWidget           *widget,
 487                                            gint                 x,
 488                                            gint                 y);
 489 gint       gtk_widget_intersect           (GtkWidget           *widget,
 490                                            GdkRectangle        *area,
 491                                            GdkRectangle        *intersection);
 492
 493 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 494 void       gtk_widget_grab_default        (GtkWidget           *widget);
 495
 496 void       gtk_widget_set_name            (GtkWidget           *widget,
 497                                            const gchar         *name);
 498 gchar*     gtk_widget_get_name            (GtkWidget           *widget);
 499 void       gtk_widget_set_state           (GtkWidget           *widget,
 500                                            GtkStateType         state);
 501 void       gtk_widget_set_sensitive       (GtkWidget           *widget,
 502                                            gboolean             sensitive);
 503 void       gtk_widget_set_app_paintable   (GtkWidget           *widget,
 504                                            gboolean             app_paintable);
 505 void       gtk_widget_set_parent          (GtkWidget           *widget,
 506                                            GtkWidget           *parent);
 507 void       gtk_widget_set_parent_window   (GtkWidget           *widget,
 508                                            GdkWindow           *parent_window);
 509 GdkWindow *gtk_widget_get_parent_window   (GtkWidget           *widget);
 510 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 511                                            gint                 x,
 512                                            gint                 y);
 513 void       gtk_widget_set_usize           (GtkWidget           *widget,
 514                                            gint                 width,
 515                                            gint                 height);
 516 void       gtk_widget_set_events          (GtkWidget           *widget,
 517                                            gint                 events);
 518 void       gtk_widget_add_events          (GtkWidget           *widget,
 519                                            gint                 events);
 520 void       gtk_widget_set_extension_events (GtkWidget           *widget,
 521                                             GdkExtensionMode    mode);
 522
 523 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
 524 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
 525 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
 526                                          GtkType        widget_type);
 527 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
 528 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
 529 gint         gtk_widget_get_events      (GtkWidget      *widget);
 530 void         gtk_widget_get_pointer     (GtkWidget      *widget,
 531                                          gint           *x,
 532                                          gint           *y);
 533
 534 gint         gtk_widget_is_ancestor     (GtkWidget      *widget,
 535                                          GtkWidget      *ancestor);
 536
 537 /* Hide widget and return TRUE.
 538  */
 539 gint       gtk_widget_hide_on_delete    (GtkWidget      *widget);
 540
 541 /* Widget styles.
 542  */
 543 void       gtk_widget_set_style         (GtkWidget      *widget,
 544                                          GtkStyle       *style);
 545 void       gtk_widget_set_rc_style      (GtkWidget      *widget);
 546 void       gtk_widget_ensure_style      (GtkWidget      *widget);
 547 GtkStyle*  gtk_widget_get_style         (GtkWidget      *widget);
 548 void       gtk_widget_restore_default_style (GtkWidget  *widget);
 549
 550 void       gtk_widget_modify_style      (GtkWidget      *widget,
 551                                          GtkRcStyle     *style);
 552
 553 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
 554  * the returned name is newly allocated.
 555  */
 556 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
 557                                          gchar          *name);
 558 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
 559
 560 /* Descend recursively and set rc-style on all widgets without user styles */
 561 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
 562
 563 /* Push/pop pairs, to change default values upon a widget's creation.
 564  * This will override the values that got set by the
 565  * gtk_widget_set_default_* () functions.
 566  */
 567 void         gtk_widget_push_style           (GtkStyle   *style);
 568 void         gtk_widget_push_colormap        (GdkColormap *cmap);
 569 void         gtk_widget_push_visual          (GdkVisual  *visual);
 570 void         gtk_widget_push_composite_child (void);
 571 void         gtk_widget_pop_composite_child  (void);
 572 void         gtk_widget_pop_style            (void);
 573 void         gtk_widget_pop_colormap         (void);
 574 void         gtk_widget_pop_visual           (void);
 575
 576 /* Set certain default values to be used at widget creation time.
 577  */
 578 void         gtk_widget_set_default_style    (GtkStyle    *style);
 579 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
 580 void         gtk_widget_set_default_visual   (GdkVisual   *visual);
 581 GtkStyle*    gtk_widget_get_default_style    (void);
 582 GdkColormap* gtk_widget_get_default_colormap (void);
 583 GdkVisual*   gtk_widget_get_default_visual   (void);
 584
 585 /* Counterpart to gdk_window_shape_combine_mask.
 586  */
 587 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
 588                                             GdkBitmap *shape_mask,
 589                                             gint       offset_x,
 590                                             gint       offset_y);
 591
 592 /* internal function */
 593 void         gtk_widget_reset_shapes       (GtkWidget *widget);
 594
 595 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
 596  * return newly alocated strings.
 597  */
 598 void         gtk_widget_path               (GtkWidget *widget,
 599                                             guint     *path_length,
 600                                             gchar    **path,
 601                                             gchar    **path_reversed);
 602 void         gtk_widget_class_path         (GtkWidget *widget,
 603                                             guint     *path_length,
 604                                             gchar    **path,
 605                                             gchar    **path_reversed);
 606
 607 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
 608 #  define gtk_widget_ref gtk_object_ref
 609 #  define gtk_widget_unref gtk_object_unref
 610 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
 611
 612
 613 /* deprecated */
 614 void       gtk_widget_freeze_accelerators (GtkWidget           *widget);
 615 void       gtk_widget_thaw_accelerators   (GtkWidget           *widget);
 616
 617
 618 #ifdef __cplusplus
 619 }
 620 #endif /* __cplusplus */
 621
 622
 623 #endif /* __GTK_WIDGET_H__ */