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 #if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  28 #error "Only <gtk/gtk.h> can be included directly."
  29 #endif
  30
  31 #ifndef __GTK_WIDGET_H__
  32 #define __GTK_WIDGET_H__
  33
  34 #include <gdk/gdk.h>
  35 #include <gtk/gtkaccelgroup.h>
  36 #include <gtk/gtkobject.h>
  37 #include <gtk/gtkadjustment.h>
  38 #include <gtk/gtkstyle.h>
  39 #include <gtk/gtksettings.h>
  40 #include <atk/atk.h>
  41
  42 G_BEGIN_DECLS
  43
  44 /**
  45  * GtkWidgetFlags:
  46  * @GTK_TOPLEVEL: widgets without a real parent, as there are #GtkWindow<!-- -->s and
  47  *  #GtkMenu<!-- -->s have this flag set throughout their lifetime.
  48  *  Toplevel widgets always contain their own #GdkWindow.
  49  * @GTK_NO_WINDOW: Indicative for a widget that does not provide its own #GdkWindow.
  50  *  Visible action (e.g. drawing) is performed on the parent's #GdkWindow.
  51  * @GTK_REALIZED: Set by gtk_widget_realize(), unset by gtk_widget_unrealize().
  52  *  A realized widget has an associated #GdkWindow.
  53  * @GTK_MAPPED: Set by gtk_widget_map(), unset by gtk_widget_unmap().
  54  *  Only realized widgets can be mapped. It means that gdk_window_show()
  55  *  has been called on the widgets window(s).
  56  * @GTK_VISIBLE: Set by gtk_widget_show(), unset by gtk_widget_hide(). Implies that a
  57  *  widget will be mapped as soon as its parent is mapped.
  58  * @GTK_SENSITIVE: Set and unset by gtk_widget_set_sensitive().
  59  *  The sensitivity of a widget determines whether it will receive
  60  *  certain events (e.g. button or key presses). One premise for
  61  *  the widget's sensitivity is to have this flag set.
  62  * @GTK_PARENT_SENSITIVE: Set and unset by gtk_widget_set_sensitive() operations on the
  63  *  parents of the widget.
  64  *  This is the second premise for the widget's sensitivity. Once
  65  *  it has %GTK_SENSITIVE and %GTK_PARENT_SENSITIVE set, its state is
  66  *  effectively sensitive. This is expressed (and can be examined) by
  67  *  the #GTK_WIDGET_IS_SENSITIVE macro.
  68  * @GTK_CAN_FOCUS: Determines whether a widget is able to handle focus grabs.
  69  * @GTK_HAS_FOCUS: Set by gtk_widget_grab_focus() for widgets that also
  70  *  have %GTK_CAN_FOCUS set. The flag will be unset once another widget
  71  *  grabs the focus.
  72  * @GTK_CAN_DEFAULT: The widget is allowed to receive the default action via
  73  *  gtk_widget_grab_default() and will reserve space to draw the default if possible
  74  * @GTK_HAS_DEFAULT: The widget currently is receiving the default action and
  75  *  should be drawn appropriately if possible
  76  * @GTK_HAS_GRAB: Set by gtk_grab_add(), unset by gtk_grab_remove(). It means that the
  77  *  widget is in the grab_widgets stack, and will be the preferred one for
  78  *  receiving events other than ones of cosmetic value.
  79  * @GTK_RC_STYLE: Indicates that the widget's style has been looked up through the rc
  80  *  mechanism. It does not imply that the widget actually had a style
  81  *  defined through the rc mechanism.
  82  * @GTK_COMPOSITE_CHILD: Indicates that the widget is a composite child of its parent; see
  83  *  gtk_widget_push_composite_child(), gtk_widget_pop_composite_child().
  84  * @GTK_NO_REPARENT: Unused since before GTK+ 1.2, will be removed in a future version.
  85  * @GTK_APP_PAINTABLE: Set and unset by gtk_widget_set_app_paintable().
  86  *  Must be set on widgets whose window the application directly draws on,
  87  *  in order to keep GTK+ from overwriting the drawn stuff.  See
  88  *  <xref linkend="app-paintable-widgets"/> for a detailed
  89  *  description of this flag.
  90  * @GTK_RECEIVES_DEFAULT: The widget when focused will receive the default action and have
  91  *  %GTK_HAS_DEFAULT set even if there is a different widget set as default.
  92  * @GTK_DOUBLE_BUFFERED: Set and unset by gtk_widget_set_double_buffered().
  93  *  Indicates that exposes done on the widget should be
  94  *  double-buffered.  See <xref linkend="double-buffering"/> for a
  95  *  detailed discussion of how double-buffering works in GTK+ and
  96  *  why you may want to disable it for special cases.
  97  * @GTK_NO_SHOW_ALL:
  98  *
  99  * Tells about certain properties of the widget.
 100  */
 101 typedef enum
 102 {
 103   GTK_TOPLEVEL         = 1 << 4,
 104   GTK_NO_WINDOW        = 1 << 5,
 105   GTK_REALIZED         = 1 << 6,
 106   GTK_MAPPED           = 1 << 7,
 107   GTK_VISIBLE          = 1 << 8,
 108   GTK_SENSITIVE        = 1 << 9,
 109   GTK_PARENT_SENSITIVE = 1 << 10,
 110   GTK_CAN_FOCUS        = 1 << 11,
 111   GTK_HAS_FOCUS        = 1 << 12,
 112   GTK_CAN_DEFAULT      = 1 << 13,
 113   GTK_HAS_DEFAULT      = 1 << 14,
 114   GTK_HAS_GRAB         = 1 << 15,
 115   GTK_RC_STYLE         = 1 << 16,
 116   GTK_COMPOSITE_CHILD  = 1 << 17,
 117   GTK_NO_REPARENT      = 1 << 18,
 118   GTK_APP_PAINTABLE    = 1 << 19,
 119   GTK_RECEIVES_DEFAULT = 1 << 20,
 120   GTK_DOUBLE_BUFFERED  = 1 << 21,
 121   GTK_NO_SHOW_ALL      = 1 << 22
 122 } GtkWidgetFlags;
 123
 124 /* Kinds of widget-specific help */
 125 typedef enum
 126 {
 127   GTK_WIDGET_HELP_TOOLTIP,
 128   GTK_WIDGET_HELP_WHATS_THIS
 129 } GtkWidgetHelpType;
 130
 131 /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
 132  * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
 133  */
 134 #define GTK_TYPE_WIDGET                   (gtk_widget_get_type ())
 135 #define GTK_WIDGET(widget)                (G_TYPE_CHECK_INSTANCE_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
 136 #define GTK_WIDGET_CLASS(klass)           (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
 137 #define GTK_IS_WIDGET(widget)             (G_TYPE_CHECK_INSTANCE_TYPE ((widget), GTK_TYPE_WIDGET))
 138 #define GTK_IS_WIDGET_CLASS(klass)        (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
 139 #define GTK_WIDGET_GET_CLASS(obj)         (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))
 140
 141 /* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
 142  */
 143 #ifndef GTK_DISABLE_DEPRECATED
 144 /**
 145  * GTK_WIDGET_TYPE:
 146  * @wid: a #GtkWidget.
 147  *
 148  * Gets the type of a widget.
 149  *
 150  * Deprecated: 2.20: Use G_OBJECT_TYPE() instead.
 151  */
 152 #define GTK_WIDGET_TYPE(wid)              (GTK_OBJECT_TYPE (wid))
 153 #endif
 154
 155 /**
 156  * GTK_WIDGET_STATE:
 157  * @wid: a #GtkWidget.
 158  *
 159  * Returns the current state of the widget, as a #GtkStateType.
 160  *
 161  * Deprecated: 2.20: Use gtk_widget_get_state() instead.
 162  */
 163 #define GTK_WIDGET_STATE(wid)             (GTK_WIDGET (wid)->state)
 164 /* FIXME: Deprecating GTK_WIDGET_STATE requires fixing GTK internals. */
 165
 166 #ifndef GTK_DISABLE_DEPRECATED
 167 /**
 168  * GTK_WIDGET_SAVED_STATE:
 169  * @wid: a #GtkWidget.
 170  *
 171  * Returns the saved state of the widget, as a #GtkStateType.
 172  *
 173  * The saved state will be restored when a widget gets sensitive
 174  * again, after it has been made insensitive with gtk_widget_set_state()
 175  * or gtk_widget_set_sensitive().
 176  *
 177  * Deprecated: 2.20: Do not used it.
 178  */
 179 #define GTK_WIDGET_SAVED_STATE(wid)       (GTK_WIDGET (wid)->saved_state)
 180 #endif
 181
 182
 183 /* Macros for extracting the widget flags from GtkWidget.
 184  */
 185 /**
 186  * GTK_WIDGET_FLAGS:
 187  * @wid: a #GtkWidget.
 188  *
 189  * Returns the widget flags from @wid.
 190  *
 191  * Deprecated: 2.20: Do not use it.
 192  */
 193 #define GTK_WIDGET_FLAGS(wid)             (GTK_OBJECT_FLAGS (wid))
 194 /* FIXME: Deprecating GTK_WIDGET_FLAGS requires fixing GTK internals. */
 195
 196 #ifndef GTK_DISABLE_DEPRECATED
 197 /**
 198  * GTK_WIDGET_TOPLEVEL:
 199  * @wid: a #GtkWidget.
 200  *
 201  * Evaluates to %TRUE if the widget is a toplevel widget.
 202  *
 203  * Deprecated: 2.20: Use gtk_widget_is_toplevel() instead.
 204  */
 205 #define GTK_WIDGET_TOPLEVEL(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
 206 #endif
 207
 208 #ifndef GTK_DISABLE_DEPRECATED
 209 /**
 210  * GTK_WIDGET_NO_WINDOW:
 211  * @wid: a #GtkWidget.
 212  *
 213  * Evaluates to %TRUE if the widget doesn't have an own #GdkWindow.
 214  *
 215  * Deprecated: 2.20: Use gtk_widget_get_has_window() instead.
 216  */
 217 #define GTK_WIDGET_NO_WINDOW(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
 218 #endif
 219
 220 /**
 221  * GTK_WIDGET_REALIZED:
 222  * @wid: a #GtkWidget.
 223  *
 224  * Evaluates to %TRUE if the widget is realized.
 225  */
 226 #define GTK_WIDGET_REALIZED(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
 227
 228 /**
 229  * GTK_WIDGET_MAPPED:
 230  * @wid: a #GtkWidget.
 231  *
 232  * Evaluates to %TRUE if the widget is mapped.
 233  */
 234 #define GTK_WIDGET_MAPPED(wid)            ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
 235
 236 /**
 237  * GTK_WIDGET_VISIBLE:
 238  * @wid: a #GtkWidget.
 239  *
 240  * Evaluates to %TRUE if the widget is visible.
 241  */
 242 #define GTK_WIDGET_VISIBLE(wid)           ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
 243
 244 #ifndef GTK_DISABLE_DEPRECATED
 245 /**
 246  * GTK_WIDGET_DRAWABLE:
 247  * @wid: a #GtkWidget.
 248  *
 249  * Evaluates to %TRUE if the widget is mapped and visible.
 250  *
 251  * Deprecated: 2.20: Use gtk_widget_is_drawable() instead.
 252  */
 253 #define GTK_WIDGET_DRAWABLE(wid)          (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))
 254 #endif
 255
 256 #ifndef GTK_DISABLE_DEPRECATED
 257 /**
 258  * GTK_WIDGET_SENSITIVE:
 259  * @wid: a #GtkWidget.
 260  *
 261  * Evaluates to %TRUE if the #GTK_SENSITIVE flag has be set on the widget.
 262  */
 263 #define GTK_WIDGET_SENSITIVE(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
 264 #endif
 265
 266 /**
 267  * GTK_WIDGET_PARENT_SENSITIVE:
 268  * @wid: a #GtkWidget.
 269  *
 270  * Evaluates to %TRUE if the #GTK_PARENT_SENSITIVE flag has be set on the widget.
 271  */
 272 #define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
 273
 274 #ifndef GTK_DISABLE_DEPRECATED
 275 /**
 276  * GTK_WIDGET_IS_SENSITIVE:
 277  * @wid: a #GtkWidget.
 278  *
 279  * Evaluates to %TRUE if the widget is effectively sensitive.
 280  *
 281  * Deprecated: 2.20: Use gtk_widget_is_sensitive() instead.
 282  */
 283 #define GTK_WIDGET_IS_SENSITIVE(wid)      (GTK_WIDGET_SENSITIVE (wid) && \
 284                                            GTK_WIDGET_PARENT_SENSITIVE (wid))
 285 #endif
 286
 287 #ifndef GTK_DISABLE_DEPRECATED
 288 /**
 289  * GTK_WIDGET_CAN_FOCUS:
 290  * @wid: a #GtkWidget.
 291  *
 292  * Evaluates to %TRUE if the widget is able to handle focus grabs.
 293  *
 294  * Deprecated: 2.20: Use gtk_widget_get_can_focus() instead.
 295  */
 296 #define GTK_WIDGET_CAN_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
 297 #endif
 298
 299 #ifndef GTK_DISABLE_DEPRECATED
 300 /**
 301  * GTK_WIDGET_HAS_FOCUS:
 302  * @wid: a #GtkWidget.
 303  *
 304  * Evaluates to %TRUE if the widget has grabbed the focus and no other
 305  * widget has done so more recently.
 306  *
 307  * Deprecated: 2.20: Use gtk_widget_has_focus() instead.
 308  */
 309 #define GTK_WIDGET_HAS_FOCUS(wid)         ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
 310 #endif
 311
 312 #ifndef GTK_DISABLE_DEPRECATED
 313 /**
 314  * GTK_WIDGET_CAN_DEFAULT:
 315  * @wid: a #GtkWidget.
 316  *
 317  * Evaluates to %TRUE if the widget is allowed to receive the default action
 318  * via gtk_widget_grab_default().
 319  *
 320  * Deprecated: 2.20: Use gtk_widget_get_can_default() instead.
 321  */
 322 #define GTK_WIDGET_CAN_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
 323 #endif
 324
 325 #ifndef GTK_DISABLE_DEPRECATED
 326 /**
 327  * GTK_WIDGET_HAS_DEFAULT:
 328  * @wid: a #GtkWidget.
 329  *
 330  * Evaluates to %TRUE if the widget currently is receiving the default action.
 331  *
 332  * Deprecated: 2.20: Use gtk_widget_has_default() instead.
 333  */
 334 #define GTK_WIDGET_HAS_DEFAULT(wid)       ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
 335 #endif
 336
 337 #ifndef GTK_DISABLE_DEPRECATED
 338 /**
 339  * GTK_WIDGET_HAS_GRAB:
 340  * @wid: a #GtkWidget.
 341  *
 342  * Evaluates to %TRUE if the widget is in the grab_widgets stack, and will be
 343  * the preferred one for receiving events other than ones of cosmetic value.
 344  *
 345  * Deprecated: 2.20: Use gtk_widget_has_grab() instead.
 346  */
 347 #define GTK_WIDGET_HAS_GRAB(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
 348 #endif
 349
 350 #ifndef GTK_DISABLE_DEPRECATED
 351 /**
 352  * GTK_WIDGET_RC_STYLE:
 353  * @wid: a #GtkWidget.
 354  *
 355  * Evaluates to %TRUE if the widget's style has been looked up through the rc
 356  * mechanism.
 357  *
 358  * Deprecated: 2.20: Use gtk_widget_has_rc_style() instead.
 359  */
 360 #define GTK_WIDGET_RC_STYLE(wid)          ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
 361 #endif
 362
 363 #ifndef GTK_DISABLE_DEPRECATED
 364 /**
 365  * GTK_WIDGET_COMPOSITE_CHILD:
 366  * @wid: a #GtkWidget.
 367  *
 368  * Evaluates to %TRUE if the widget is a composite child of its parent.
 369  *
 370  * Deprecated: 2.20: Use the #GtkWidget:composite-child property instead.
 371  */
 372 #define GTK_WIDGET_COMPOSITE_CHILD(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
 373 #endif
 374
 375 #ifndef GTK_DISABLE_DEPRECATED
 376 /**
 377  * GTK_WIDGET_APP_PAINTABLE:
 378  * @wid: a #GtkWidget.
 379  *
 380  * Evaluates to %TRUE if the #GTK_APP_PAINTABLE flag has been set on the widget.
 381  *
 382  * Deprecated: 2.20: Use gtk_widget_get_app_paintable() instead.
 383  */
 384 #define GTK_WIDGET_APP_PAINTABLE(wid)     ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)
 385 #endif
 386
 387 #ifndef GTK_DISABLE_DEPRECATED
 388 /**
 389  * GTK_WIDGET_RECEIVES_DEFAULT:
 390  * @wid: a #GtkWidget.
 391  *
 392  * Evaluates to %TRUE if the widget when focused will receive the default action
 393  * even if there is a different widget set as default.
 394  *
 395  * Deprecated: 2.20: Use gtk_widget_get_receives_default() instead.
 396  */
 397 #define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)
 398 #endif
 399
 400 #ifndef GTK_DISABLE_DEPRECATED
 401 /**
 402  * GTK_WIDGET_DOUBLE_BUFFERED:
 403  * @wid: a #GtkWidget.
 404  *
 405  * Evaluates to %TRUE if the #GTK_DOUBLE_BUFFERED flag has been set on the widget.
 406  *
 407  * Deprecated: 2.20: Use gtk_widget_get_double_buffered() instead.
 408  */
 409 #define GTK_WIDGET_DOUBLE_BUFFERED(wid)   ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)
 410 #endif
 411
 412
 413 /* Macros for setting and clearing widget flags.
 414  */
 415 /**
 416  * GTK_WIDGET_SET_FLAGS:
 417  * @wid: a #GtkWidget.
 418  * @flag: the flags to set.
 419  *
 420  * Turns on certain widget flags.
 421  */
 422 #define GTK_WIDGET_SET_FLAGS(wid,flag)    G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
 423
 424 /**
 425  * GTK_WIDGET_UNSET_FLAGS:
 426  * @wid: a #GtkWidget.
 427  * @flag: the flags to unset.
 428  *
 429  * Turns off certain widget flags.
 430  */
 431 #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END
 432
 433 #define GTK_TYPE_REQUISITION              (gtk_requisition_get_type ())
 434
 435 /* forward declaration to avoid excessive includes (and concurrent includes)
 436  */
 437 typedef struct _GtkRequisition     GtkRequisition;
 438 typedef struct _GtkSelectionData   GtkSelectionData;
 439 typedef struct _GtkWidgetClass     GtkWidgetClass;
 440 typedef struct _GtkWidgetAuxInfo   GtkWidgetAuxInfo;
 441 typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
 442 typedef struct _GtkClipboard       GtkClipboard;
 443 typedef struct _GtkTooltip         GtkTooltip;
 444 typedef struct _GtkWindow          GtkWindow;
 445
 446 /**
 447  * GtkAllocation:
 448  * @x: the X position of the widget's area relative to its parents allocation.
 449  * @y: the Y position of the widget's area relative to its parents allocation.
 450  * @width: the width of the widget's allocated area.
 451  * @height: the height of the widget's allocated area.
 452  *
 453  * A <structname>GtkAllocation</structname> of a widget represents region which has been allocated to the
 454  * widget by its parent. It is a subregion of its parents allocation. See
 455  * <xref linkend="size-allocation"/> for more information.
 456  */
 457 typedef         GdkRectangle       GtkAllocation;
 458
 459 /**
 460  * GtkCallback:
 461  * @widget: the widget to operate on
 462  * @data: user-supplied data
 463  *
 464  * The type of the callback functions used for e.g. iterating over
 465  * the children of a container, see gtk_container_foreach().
 466  */
 467 typedef void    (*GtkCallback)     (GtkWidget        *widget,
 468                                     gpointer          data);
 469
 470 /**
 471  * GtkRequisition:
 472  * @width: the widget's desired width
 473  * @height: the widget's desired height
 474  *
 475  * A <structname>GtkRequisition</structname> represents the desired size of a widget. See
 476  * <xref linkend="size-requisition"/> for more information.
 477  */
 478 struct _GtkRequisition
 479 {
 480   gint width;
 481   gint height;
 482 };
 483
 484 /* The widget is the base of the tree for displayable objects.
 485  *  (A displayable object is one which takes up some amount
 486  *  of screen real estate). It provides a common base and interface
 487  *  which actual widgets must adhere to.
 488  */
 489 struct _GtkWidget
 490 {
 491   /* The object structure needs to be the first
 492    *  element in the widget structure in order for
 493    *  the object mechanism to work correctly. This
 494    *  allows a GtkWidget pointer to be cast to a
 495    *  GtkObject pointer.
 496    */
 497   GtkObject object;
 498
 499   /* 16 bits of internally used private flags.
 500    * this will be packed into the same 4 byte alignment frame that
 501    * state and saved_state go. we therefore don't waste any new
 502    * space on this.
 503    */
 504   guint16 GSEAL (private_flags);
 505
 506   /* The state of the widget. There are actually only
 507    *  5 widget states (defined in "gtkenums.h").
 508    */
 509   guint8 GSEAL (state);
 510
 511   /* The saved state of the widget. When a widget's state
 512    *  is changed to GTK_STATE_INSENSITIVE via
 513    *  "gtk_widget_set_state" or "gtk_widget_set_sensitive"
 514    *  the old state is kept around in this field. The state
 515    *  will be restored once the widget gets sensitive again.
 516    */
 517   guint8 GSEAL (saved_state);
 518
 519   /* The widget's name. If the widget does not have a name
 520    *  (the name is NULL), then its name (as returned by
 521    *  "gtk_widget_get_name") is its class's name.
 522    * Among other things, the widget name is used to determine
 523    *  the style to use for a widget.
 524    */
 525   gchar *GSEAL (name);
 526
 527   /*< public >*/
 528
 529   /* The style for the widget. The style contains the
 530    *  colors the widget should be drawn in for each state
 531    *  along with graphics contexts used to draw with and
 532    *  the font to use for text.
 533    */
 534   GtkStyle *GSEAL (style);
 535
 536   /* The widget's desired size.
 537    */
 538   GtkRequisition GSEAL (requisition);
 539
 540   /* The widget's allocated size.
 541    */
 542   GtkAllocation GSEAL (allocation);
 543
 544   /* The widget's window or its parent window if it does
 545    *  not have a window. (Which will be indicated by the
 546    *  GTK_NO_WINDOW flag being set).
 547    */
 548   GdkWindow *GSEAL (window);
 549
 550   /* The widget's parent.
 551    */
 552   GtkWidget *GSEAL (parent);
 553 };
 554
 555 /**
 556  * GtkWidgetClass:
 557  * @parent_class:
 558  * @activate_signal:
 559  * @set_scroll_adjustments_signal:
 560  *
 561  * <structfield>activate_signal</structfield>
 562  * The signal to emit when a widget of this class is activated,
 563  * gtk_widget_activate() handles the emission. Implementation of this
 564  * signal is optional.
 565  *
 566  *
 567  * <structfield>set_scroll_adjustment_signal</structfield>
 568  * This signal is emitted  when a widget of this class is added
 569  * to a scrolling aware parent, gtk_widget_set_scroll_adjustments()
 570  * handles the emission.
 571  * Implementation of this signal is optional.
 572  */
 573 struct _GtkWidgetClass
 574 {
 575   /* The object class structure needs to be the first
 576    *  element in the widget class structure in order for
 577    *  the class mechanism to work correctly. This allows a
 578    *  GtkWidgetClass pointer to be cast to a GtkObjectClass
 579    *  pointer.
 580    */
 581   GtkObjectClass parent_class;
 582
 583   /*< public >*/
 584
 585   guint activate_signal;
 586
 587   guint set_scroll_adjustments_signal;
 588
 589   /*< private >*/
 590
 591   /* seldomly overidden */
 592   void (*dispatch_child_properties_changed) (GtkWidget   *widget,
 593                                              guint        n_pspecs,
 594                                              GParamSpec **pspecs);
 595
 596   /* basics */
 597   void (* show)                (GtkWidget        *widget);
 598   void (* show_all)            (GtkWidget        *widget);
 599   void (* hide)                (GtkWidget        *widget);
 600   void (* hide_all)            (GtkWidget        *widget);
 601   void (* map)                 (GtkWidget        *widget);
 602   void (* unmap)               (GtkWidget        *widget);
 603   void (* realize)             (GtkWidget        *widget);
 604   void (* unrealize)           (GtkWidget        *widget);
 605   void (* size_request)        (GtkWidget        *widget,
 606                                 GtkRequisition   *requisition);
 607   void (* size_allocate)       (GtkWidget        *widget,
 608                                 GtkAllocation    *allocation);
 609   void (* state_changed)       (GtkWidget        *widget,
 610                                 GtkStateType      previous_state);
 611   void (* parent_set)          (GtkWidget        *widget,
 612                                 GtkWidget        *previous_parent);
 613   void (* hierarchy_changed)   (GtkWidget        *widget,
 614                                 GtkWidget        *previous_toplevel);
 615   void (* style_set)           (GtkWidget        *widget,
 616                                 GtkStyle         *previous_style);
 617   void (* direction_changed)   (GtkWidget        *widget,
 618                                 GtkTextDirection  previous_direction);
 619   void (* grab_notify)         (GtkWidget        *widget,
 620                                 gboolean          was_grabbed);
 621   void (* child_notify)        (GtkWidget        *widget,
 622                                 GParamSpec       *pspec);
 623
 624   /* Mnemonics */
 625   gboolean (* mnemonic_activate) (GtkWidget    *widget,
 626                                   gboolean      group_cycling);
 627
 628   /* explicit focus */
 629   void     (* grab_focus)      (GtkWidget        *widget);
 630   gboolean (* focus)           (GtkWidget        *widget,
 631                                 GtkDirectionType  direction);
 632
 633   /* events */
 634   gboolean (* event)                    (GtkWidget           *widget,
 635                                          GdkEvent            *event);
 636   gboolean (* button_press_event)       (GtkWidget           *widget,
 637                                          GdkEventButton      *event);
 638   gboolean (* button_release_event)     (GtkWidget           *widget,
 639                                          GdkEventButton      *event);
 640   gboolean (* scroll_event)             (GtkWidget           *widget,
 641                                          GdkEventScroll      *event);
 642   gboolean (* motion_notify_event)      (GtkWidget           *widget,
 643                                          GdkEventMotion      *event);
 644   gboolean (* delete_event)             (GtkWidget           *widget,
 645                                          GdkEventAny         *event);
 646   gboolean (* destroy_event)            (GtkWidget           *widget,
 647                                          GdkEventAny         *event);
 648   gboolean (* expose_event)             (GtkWidget           *widget,
 649                                          GdkEventExpose      *event);
 650   gboolean (* key_press_event)          (GtkWidget           *widget,
 651                                          GdkEventKey         *event);
 652   gboolean (* key_release_event)        (GtkWidget           *widget,
 653                                          GdkEventKey         *event);
 654   gboolean (* enter_notify_event)       (GtkWidget           *widget,
 655                                          GdkEventCrossing    *event);
 656   gboolean (* leave_notify_event)       (GtkWidget           *widget,
 657                                          GdkEventCrossing    *event);
 658   gboolean (* configure_event)          (GtkWidget           *widget,
 659                                          GdkEventConfigure   *event);
 660   gboolean (* focus_in_event)           (GtkWidget           *widget,
 661                                          GdkEventFocus       *event);
 662   gboolean (* focus_out_event)          (GtkWidget           *widget,
 663                                          GdkEventFocus       *event);
 664   gboolean (* map_event)                (GtkWidget           *widget,
 665                                          GdkEventAny         *event);
 666   gboolean (* unmap_event)              (GtkWidget           *widget,
 667                                          GdkEventAny         *event);
 668   gboolean (* property_notify_event)    (GtkWidget           *widget,
 669                                          GdkEventProperty    *event);
 670   gboolean (* selection_clear_event)    (GtkWidget           *widget,
 671                                          GdkEventSelection   *event);
 672   gboolean (* selection_request_event)  (GtkWidget           *widget,
 673                                          GdkEventSelection   *event);
 674   gboolean (* selection_notify_event)   (GtkWidget           *widget,
 675                                          GdkEventSelection   *event);
 676   gboolean (* proximity_in_event)       (GtkWidget           *widget,
 677                                          GdkEventProximity   *event);
 678   gboolean (* proximity_out_event)      (GtkWidget           *widget,
 679                                          GdkEventProximity   *event);
 680   gboolean (* visibility_notify_event)  (GtkWidget           *widget,
 681                                          GdkEventVisibility  *event);
 682   gboolean (* client_event)             (GtkWidget           *widget,
 683                                          GdkEventClient      *event);
 684   gboolean (* no_expose_event)          (GtkWidget           *widget,
 685                                          GdkEventAny         *event);
 686   gboolean (* window_state_event)       (GtkWidget           *widget,
 687                                          GdkEventWindowState *event);
 688
 689   /* selection */
 690   void (* selection_get)           (GtkWidget          *widget,
 691                                     GtkSelectionData   *selection_data,
 692                                     guint               info,
 693                                     guint               time_);
 694   void (* selection_received)      (GtkWidget          *widget,
 695                                     GtkSelectionData   *selection_data,
 696                                     guint               time_);
 697
 698   /* Source side drag signals */
 699   void (* drag_begin)              (GtkWidget          *widget,
 700                                     GdkDragContext     *context);
 701   void (* drag_end)                (GtkWidget          *widget,
 702                                     GdkDragContext     *context);
 703   void (* drag_data_get)           (GtkWidget          *widget,
 704                                     GdkDragContext     *context,
 705                                     GtkSelectionData   *selection_data,
 706                                     guint               info,
 707                                     guint               time_);
 708   void (* drag_data_delete)        (GtkWidget          *widget,
 709                                     GdkDragContext     *context);
 710
 711   /* Target side drag signals */
 712   void (* drag_leave)              (GtkWidget          *widget,
 713                                     GdkDragContext     *context,
 714                                     guint               time_);
 715   gboolean (* drag_motion)         (GtkWidget          *widget,
 716                                     GdkDragContext     *context,
 717                                     gint                x,
 718                                     gint                y,
 719                                     guint               time_);
 720   gboolean (* drag_drop)           (GtkWidget          *widget,
 721                                     GdkDragContext     *context,
 722                                     gint                x,
 723                                     gint                y,
 724                                     guint               time_);
 725   void (* drag_data_received)      (GtkWidget          *widget,
 726                                     GdkDragContext     *context,
 727                                     gint                x,
 728                                     gint                y,
 729                                     GtkSelectionData   *selection_data,
 730                                     guint               info,
 731                                     guint               time_);
 732
 733   /* Signals used only for keybindings */
 734   gboolean (* popup_menu)          (GtkWidget          *widget);
 735
 736   /* If a widget has multiple tooltips/whatsthis, it should show the
 737    * one for the current focus location, or if that doesn't make
 738    * sense, should cycle through them showing each tip alongside
 739    * whatever piece of the widget it applies to.
 740    */
 741   gboolean (* show_help)           (GtkWidget          *widget,
 742                                     GtkWidgetHelpType   help_type);
 743
 744   /* accessibility support
 745    */
 746   AtkObject*   (*get_accessible)     (GtkWidget *widget);
 747
 748   void         (*screen_changed)     (GtkWidget *widget,
 749                                       GdkScreen *previous_screen);
 750   gboolean     (*can_activate_accel) (GtkWidget *widget,
 751                                       guint      signal_id);
 752
 753   /* Sent when a grab is broken. */
 754   gboolean (*grab_broken_event) (GtkWidget           *widget,
 755                                  GdkEventGrabBroken  *event);
 756
 757   void         (* composited_changed) (GtkWidget *widget);
 758
 759   gboolean     (* query_tooltip)      (GtkWidget  *widget,
 760                                        gint        x,
 761                                        gint        y,
 762                                        gboolean    keyboard_tooltip,
 763                                        GtkTooltip *tooltip);
 764   /* Signals without a C default handler class slot:
 765    * gboolean   (*damage_event) (GtkWidget      *widget,
 766    *                             GdkEventExpose *event);
 767    */
 768
 769   /* Padding for future expansion */
 770   void (*_gtk_reserved5) (void);
 771   void (*_gtk_reserved6) (void);
 772   void (*_gtk_reserved7) (void);
 773 };
 774
 775 struct _GtkWidgetAuxInfo
 776 {
 777   gint x;
 778   gint y;
 779   gint width;
 780   gint height;
 781   guint x_set : 1;
 782   guint y_set : 1;
 783 };
 784
 785 struct _GtkWidgetShapeInfo
 786 {
 787   gint16     offset_x;
 788   gint16     offset_y;
 789   GdkBitmap *shape_mask;
 790 };
 791
 792 GType      gtk_widget_get_type            (void) G_GNUC_CONST;
 793 GtkWidget* gtk_widget_new                 (GType                type,
 794                                            const gchar         *first_property_name,
 795                                            ...);
 796 void       gtk_widget_destroy             (GtkWidget           *widget);
 797 void       gtk_widget_destroyed           (GtkWidget           *widget,
 798                                            GtkWidget          **widget_pointer);
 799 #ifndef GTK_DISABLE_DEPRECATED
 800 GtkWidget* gtk_widget_ref                 (GtkWidget           *widget);
 801 void       gtk_widget_unref               (GtkWidget           *widget);
 802 void       gtk_widget_set                 (GtkWidget           *widget,
 803                                            const gchar         *first_property_name,
 804                                            ...) G_GNUC_NULL_TERMINATED;
 805 #endif /* GTK_DISABLE_DEPRECATED */
 806 void       gtk_widget_unparent            (GtkWidget           *widget);
 807 void       gtk_widget_show                (GtkWidget           *widget);
 808 void       gtk_widget_show_now            (GtkWidget           *widget);
 809 void       gtk_widget_hide                (GtkWidget           *widget);
 810 void       gtk_widget_show_all            (GtkWidget           *widget);
 811 void       gtk_widget_hide_all            (GtkWidget           *widget);
 812 void       gtk_widget_set_no_show_all     (GtkWidget           *widget,
 813                                            gboolean             no_show_all);
 814 gboolean   gtk_widget_get_no_show_all     (GtkWidget           *widget);
 815 void       gtk_widget_map                 (GtkWidget           *widget);
 816 void       gtk_widget_unmap               (GtkWidget           *widget);
 817 void       gtk_widget_realize             (GtkWidget           *widget);
 818 void       gtk_widget_unrealize           (GtkWidget           *widget);
 819
 820 /* Queuing draws */
 821 void       gtk_widget_queue_draw          (GtkWidget           *widget);
 822 void       gtk_widget_queue_draw_area     (GtkWidget           *widget,
 823                                            gint                 x,
 824                                            gint                 y,
 825                                            gint                 width,
 826                                            gint                 height);
 827 #ifndef GTK_DISABLE_DEPRECATED
 828 void       gtk_widget_queue_clear         (GtkWidget           *widget);
 829 void       gtk_widget_queue_clear_area    (GtkWidget           *widget,
 830                                            gint                 x,
 831                                            gint                 y,
 832                                            gint                 width,
 833                                            gint                 height);
 834 #endif /* GTK_DISABLE_DEPRECATED */
 835
 836
 837 void       gtk_widget_queue_resize        (GtkWidget           *widget);
 838 void       gtk_widget_queue_resize_no_redraw (GtkWidget *widget);
 839 #ifndef GTK_DISABLE_DEPRECATED
 840 void       gtk_widget_draw                (GtkWidget           *widget,
 841                                            const GdkRectangle  *area);
 842 #endif /* GTK_DISABLE_DEPRECATED */
 843 void       gtk_widget_size_request        (GtkWidget           *widget,
 844                                            GtkRequisition      *requisition);
 845 void       gtk_widget_size_allocate       (GtkWidget           *widget,
 846                                            GtkAllocation       *allocation);
 847 void       gtk_widget_get_child_requisition (GtkWidget         *widget,
 848                                              GtkRequisition    *requisition);
 849 void       gtk_widget_add_accelerator     (GtkWidget           *widget,
 850                                            const gchar         *accel_signal,
 851                                            GtkAccelGroup       *accel_group,
 852                                            guint                accel_key,
 853                                            GdkModifierType      accel_mods,
 854                                            GtkAccelFlags        accel_flags);
 855 gboolean   gtk_widget_remove_accelerator  (GtkWidget           *widget,
 856                                            GtkAccelGroup       *accel_group,
 857                                            guint                accel_key,
 858                                            GdkModifierType      accel_mods);
 859 void       gtk_widget_set_accel_path      (GtkWidget           *widget,
 860                                            const gchar         *accel_path,
 861                                            GtkAccelGroup       *accel_group);
 862 const gchar* _gtk_widget_get_accel_path   (GtkWidget           *widget,
 863                                            gboolean            *locked);
 864 GList*     gtk_widget_list_accel_closures (GtkWidget           *widget);
 865 gboolean   gtk_widget_can_activate_accel  (GtkWidget           *widget,
 866                                            guint                signal_id);
 867 gboolean   gtk_widget_mnemonic_activate   (GtkWidget           *widget,
 868                                            gboolean             group_cycling);
 869 gboolean   gtk_widget_event               (GtkWidget           *widget,
 870                                            GdkEvent            *event);
 871 gint       gtk_widget_send_expose         (GtkWidget           *widget,
 872                                            GdkEvent            *event);
 873
 874 gboolean   gtk_widget_activate               (GtkWidget        *widget);
 875 gboolean   gtk_widget_set_scroll_adjustments (GtkWidget        *widget,
 876                                               GtkAdjustment    *hadjustment,
 877                                               GtkAdjustment    *vadjustment);
 878
 879 void       gtk_widget_reparent            (GtkWidget           *widget,
 880                                            GtkWidget           *new_parent);
 881 gboolean   gtk_widget_intersect           (GtkWidget           *widget,
 882                                            const GdkRectangle  *area,
 883                                            GdkRectangle        *intersection);
 884 GdkRegion *gtk_widget_region_intersect    (GtkWidget           *widget,
 885                                            const GdkRegion     *region);
 886
 887 void    gtk_widget_freeze_child_notify    (GtkWidget           *widget);
 888 void    gtk_widget_child_notify           (GtkWidget           *widget,
 889                                            const gchar         *child_property);
 890 void    gtk_widget_thaw_child_notify      (GtkWidget           *widget);
 891
 892 void       gtk_widget_set_can_focus       (GtkWidget           *widget,
 893                                            gboolean             can_focus);
 894 gboolean   gtk_widget_get_can_focus       (GtkWidget           *widget);
 895 gboolean   gtk_widget_has_focus           (GtkWidget           *widget);
 896 gboolean   gtk_widget_is_focus            (GtkWidget           *widget);
 897 void       gtk_widget_grab_focus          (GtkWidget           *widget);
 898
 899 void       gtk_widget_set_can_default     (GtkWidget           *widget,
 900                                            gboolean             can_default);
 901 gboolean   gtk_widget_get_can_default     (GtkWidget           *widget);
 902 gboolean   gtk_widget_has_default         (GtkWidget           *widget);
 903 void       gtk_widget_grab_default        (GtkWidget           *widget);
 904
 905 void      gtk_widget_set_receives_default (GtkWidget           *widget,
 906                                            gboolean             receives_default);
 907 gboolean  gtk_widget_get_receives_default (GtkWidget           *widget);
 908
 909 gboolean   gtk_widget_has_grab            (GtkWidget           *widget);
 910
 911 void                  gtk_widget_set_name               (GtkWidget    *widget,
 912                                                          const gchar  *name);
 913 G_CONST_RETURN gchar* gtk_widget_get_name               (GtkWidget    *widget);
 914
 915 void                  gtk_widget_set_state              (GtkWidget    *widget,
 916                                                          GtkStateType  state);
 917 GtkStateType          gtk_widget_get_state              (GtkWidget    *widget);
 918
 919 void                  gtk_widget_set_sensitive          (GtkWidget    *widget,
 920                                                          gboolean      sensitive);
 921 gboolean              gtk_widget_get_sensitive          (GtkWidget    *widget);
 922 gboolean              gtk_widget_is_sensitive           (GtkWidget    *widget);
 923
 924 void                  gtk_widget_set_visible            (GtkWidget    *widget,
 925                                                          gboolean      visible);
 926 gboolean              gtk_widget_get_visible            (GtkWidget    *widget);
 927
 928 void                  gtk_widget_set_has_window         (GtkWidget    *widget,
 929                                                          gboolean      has_window);
 930 gboolean              gtk_widget_get_has_window         (GtkWidget    *widget);
 931
 932 gboolean              gtk_widget_is_toplevel            (GtkWidget    *widget);
 933 gboolean              gtk_widget_is_drawable            (GtkWidget    *widget);
 934 void                  gtk_widget_set_realized           (GtkWidget    *widget,
 935                                                          gboolean      realized);
 936 gboolean              gtk_widget_get_realized           (GtkWidget    *widget);
 937 void                  gtk_widget_set_mapped             (GtkWidget    *widget,
 938                                                          gboolean      mapped);
 939 gboolean              gtk_widget_get_mapped             (GtkWidget    *widget);
 940
 941 void                  gtk_widget_set_app_paintable      (GtkWidget    *widget,
 942                                                          gboolean      app_paintable);
 943 gboolean              gtk_widget_get_app_paintable      (GtkWidget    *widget);
 944
 945 void                  gtk_widget_set_double_buffered    (GtkWidget    *widget,
 946                                                          gboolean      double_buffered);
 947 gboolean              gtk_widget_get_double_buffered    (GtkWidget    *widget);
 948
 949 void                  gtk_widget_set_redraw_on_allocate (GtkWidget    *widget,
 950                                                          gboolean      redraw_on_allocate);
 951
 952 void                  gtk_widget_set_parent             (GtkWidget    *widget,
 953                                                          GtkWidget    *parent);
 954 GtkWidget           * gtk_widget_get_parent             (GtkWidget    *widget);
 955
 956 void                  gtk_widget_set_parent_window      (GtkWidget    *widget,
 957                                                          GdkWindow    *parent_window);
 958 GdkWindow           * gtk_widget_get_parent_window      (GtkWidget    *widget);
 959
 960 void                  gtk_widget_set_child_visible      (GtkWidget    *widget,
 961                                                          gboolean      is_visible);
 962 gboolean              gtk_widget_get_child_visible      (GtkWidget    *widget);
 963
 964 void                  gtk_widget_set_window             (GtkWidget    *widget,
 965                                                          GdkWindow    *window);
 966 GdkWindow           * gtk_widget_get_window             (GtkWidget    *widget);
 967
 968 void                  gtk_widget_get_allocation         (GtkWidget     *widget,
 969                                                          GtkAllocation *allocation);
 970 void                  gtk_widget_set_allocation         (GtkWidget     *widget,
 971                                                          const GtkAllocation *allocation);
 972
 973 void                  gtk_widget_get_requisition        (GtkWidget     *widget,
 974                                                          GtkRequisition *requisition);
 975
 976 gboolean   gtk_widget_child_focus         (GtkWidget           *widget,
 977                                            GtkDirectionType     direction);
 978 gboolean   gtk_widget_keynav_failed       (GtkWidget           *widget,
 979                                            GtkDirectionType     direction);
 980 void       gtk_widget_error_bell          (GtkWidget           *widget);
 981
 982 void       gtk_widget_set_size_request    (GtkWidget           *widget,
 983                                            gint                 width,
 984                                            gint                 height);
 985 void       gtk_widget_get_size_request    (GtkWidget           *widget,
 986                                            gint                *width,
 987                                            gint                *height);
 988 #ifndef GTK_DISABLE_DEPRECATED
 989 void       gtk_widget_set_uposition       (GtkWidget           *widget,
 990                                            gint                 x,
 991                                            gint                 y);
 992 void       gtk_widget_set_usize           (GtkWidget           *widget,
 993                                            gint                 width,
 994                                            gint                 height);
 995 #endif
 996
 997 void       gtk_widget_set_events          (GtkWidget           *widget,
 998                                            gint                 events);
 999 void       gtk_widget_add_events          (GtkWidget           *widget,
1000                                            gint                 events);
1001 void       gtk_widget_set_extension_events (GtkWidget           *widget,
1002                                             GdkExtensionMode    mode);
1003
1004 GdkExtensionMode gtk_widget_get_extension_events (GtkWidget     *widget);
1005 GtkWidget*   gtk_widget_get_toplevel    (GtkWidget      *widget);
1006 GtkWidget*   gtk_widget_get_ancestor    (GtkWidget      *widget,
1007                                          GType           widget_type);
1008 GdkColormap* gtk_widget_get_colormap    (GtkWidget      *widget);
1009 GdkVisual*   gtk_widget_get_visual      (GtkWidget      *widget);
1010
1011 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
1012 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
1013 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);
1014 GdkWindow *   gtk_widget_get_root_window (GtkWidget *widget);
1015 GtkSettings*  gtk_widget_get_settings    (GtkWidget *widget);
1016 GtkClipboard *gtk_widget_get_clipboard   (GtkWidget *widget,
1017                                           GdkAtom    selection);
1018 GdkPixmap *   gtk_widget_get_snapshot    (GtkWidget    *widget,
1019                                           GdkRectangle *clip_rect);
1020
1021 #ifndef GTK_DISABLE_DEPRECATED
1022
1023 /**
1024  * gtk_widget_set_visual:
1025  * @widget: a #GtkWidget
1026  * @visual: a visual
1027  *
1028  * This function is deprecated; it does nothing.
1029  */
1030 #define gtk_widget_set_visual(widget,visual)  ((void) 0)
1031
1032 /**
1033  * gtk_widget_push_visual:
1034  * @visual: a visual
1035  *
1036  * This function is deprecated; it does nothing.
1037  */
1038 #define gtk_widget_push_visual(visual)        ((void) 0)
1039
1040 /**
1041  * gtk_widget_pop_visual:
1042  *
1043  * This function is deprecated; it does nothing.
1044  */
1045 #define gtk_widget_pop_visual()               ((void) 0)
1046
1047 /**
1048  * gtk_widget_set_default_visual:
1049  * @visual: a visual
1050  *
1051  * This function is deprecated; it does nothing.
1052  */
1053 #define gtk_widget_set_default_visual(visual) ((void) 0)
1054
1055 #endif /* GTK_DISABLE_DEPRECATED */
1056
1057 /* Accessibility support */
1058 AtkObject*       gtk_widget_get_accessible               (GtkWidget          *widget);
1059
1060 /* The following functions must not be called on an already
1061  * realized widget. Because it is possible that somebody
1062  * can call get_colormap() or get_visual() and save the
1063  * result, these functions are probably only safe to
1064  * call in a widget's init() function.
1065  */
1066 void         gtk_widget_set_colormap    (GtkWidget      *widget,
1067                                          GdkColormap    *colormap);
1068
1069 gint         gtk_widget_get_events      (GtkWidget      *widget);
1070 void         gtk_widget_get_pointer     (GtkWidget      *widget,
1071                                          gint           *x,
1072                                          gint           *y);
1073
1074 gboolean     gtk_widget_is_ancestor     (GtkWidget      *widget,
1075                                          GtkWidget      *ancestor);
1076
1077 gboolean     gtk_widget_translate_coordinates (GtkWidget  *src_widget,
1078                                                GtkWidget  *dest_widget,
1079                                                gint        src_x,
1080                                                gint        src_y,
1081                                                gint       *dest_x,
1082                                                gint       *dest_y);
1083
1084 /* Hide widget and return TRUE.
1085  */
1086 gboolean     gtk_widget_hide_on_delete  (GtkWidget      *widget);
1087
1088 /* Widget styles.
1089  */
1090 void        gtk_widget_style_attach       (GtkWidget            *style);
1091
1092 gboolean    gtk_widget_has_rc_style       (GtkWidget            *widget);
1093 void        gtk_widget_set_style          (GtkWidget            *widget,
1094                                            GtkStyle             *style);
1095 void        gtk_widget_ensure_style       (GtkWidget            *widget);
1096 GtkStyle *  gtk_widget_get_style          (GtkWidget            *widget);
1097
1098 void        gtk_widget_modify_style       (GtkWidget            *widget,
1099                                            GtkRcStyle           *style);
1100 GtkRcStyle *gtk_widget_get_modifier_style (GtkWidget            *widget);
1101 void        gtk_widget_modify_fg          (GtkWidget            *widget,
1102                                            GtkStateType          state,
1103                                            const GdkColor       *color);
1104 void        gtk_widget_modify_bg          (GtkWidget            *widget,
1105                                            GtkStateType          state,
1106                                            const GdkColor       *color);
1107 void        gtk_widget_modify_text        (GtkWidget            *widget,
1108                                            GtkStateType          state,
1109                                            const GdkColor       *color);
1110 void        gtk_widget_modify_base        (GtkWidget            *widget,
1111                                            GtkStateType          state,
1112                                            const GdkColor       *color);
1113 void        gtk_widget_modify_cursor      (GtkWidget            *widget,
1114                                            const GdkColor       *primary,
1115                                            const GdkColor       *secondary);
1116 void        gtk_widget_modify_font        (GtkWidget            *widget,
1117                                            PangoFontDescription *font_desc);
1118
1119 #ifndef GTK_DISABLE_DEPRECATED
1120
1121 /**
1122  * gtk_widget_set_rc_style:
1123  * @widget: a #GtkWidget.
1124  *
1125  * Equivalent to <literal>gtk_widget_set_style (widget, NULL)</literal>.
1126  *
1127  * Deprecated: 2.0: Use gtk_widget_set_style() with a %NULL @style argument instead.
1128  */
1129 #define gtk_widget_set_rc_style(widget)          (gtk_widget_set_style (widget, NULL))
1130
1131 /**
1132  * gtk_widget_restore_default_style:
1133  * @widget: a #GtkWidget.
1134  *
1135  * Equivalent to <literal>gtk_widget_set_style (widget, NULL)</literal>.
1136  *
1137  * Deprecated: 2.0: Use gtk_widget_set_style() with a %NULL @style argument instead.
1138  */
1139 #define gtk_widget_restore_default_style(widget) (gtk_widget_set_style (widget, NULL))
1140 #endif
1141
1142 PangoContext *gtk_widget_create_pango_context (GtkWidget   *widget);
1143 PangoContext *gtk_widget_get_pango_context    (GtkWidget   *widget);
1144 PangoLayout  *gtk_widget_create_pango_layout  (GtkWidget   *widget,
1145                                                const gchar *text);
1146
1147 GdkPixbuf    *gtk_widget_render_icon          (GtkWidget   *widget,
1148                                                const gchar *stock_id,
1149                                                GtkIconSize  size,
1150                                                const gchar *detail);
1151
1152 /* handle composite names for GTK_COMPOSITE_CHILD widgets,
1153  * the returned name is newly allocated.
1154  */
1155 void   gtk_widget_set_composite_name    (GtkWidget      *widget,
1156                                          const gchar    *name);
1157 gchar* gtk_widget_get_composite_name    (GtkWidget      *widget);
1158
1159 /* Descend recursively and set rc-style on all widgets without user styles */
1160 void       gtk_widget_reset_rc_styles   (GtkWidget      *widget);
1161
1162 /* Push/pop pairs, to change default values upon a widget's creation.
1163  * This will override the values that got set by the
1164  * gtk_widget_set_default_* () functions.
1165  */
1166 void         gtk_widget_push_colormap        (GdkColormap *cmap);
1167 void         gtk_widget_push_composite_child (void);
1168 void         gtk_widget_pop_composite_child  (void);
1169 void         gtk_widget_pop_colormap         (void);
1170
1171 /* widget style properties
1172  */
1173 void gtk_widget_class_install_style_property        (GtkWidgetClass     *klass,
1174                                                      GParamSpec         *pspec);
1175 void gtk_widget_class_install_style_property_parser (GtkWidgetClass     *klass,
1176                                                      GParamSpec         *pspec,
1177                                                      GtkRcPropertyParser parser);
1178 GParamSpec*  gtk_widget_class_find_style_property   (GtkWidgetClass     *klass,
1179                                                      const gchar        *property_name);
1180 GParamSpec** gtk_widget_class_list_style_properties (GtkWidgetClass     *klass,
1181                                                      guint              *n_properties);
1182 void gtk_widget_style_get_property (GtkWidget        *widget,
1183                                     const gchar    *property_name,
1184                                     GValue           *value);
1185 void gtk_widget_style_get_valist   (GtkWidget        *widget,
1186                                     const gchar    *first_property_name,
1187                                     va_list         var_args);
1188 void gtk_widget_style_get          (GtkWidget        *widget,
1189                                     const gchar    *first_property_name,
1190                                     ...) G_GNUC_NULL_TERMINATED;
1191
1192
1193 /* Set certain default values to be used at widget creation time.
1194  */
1195 void         gtk_widget_set_default_colormap (GdkColormap *colormap);
1196 GtkStyle*    gtk_widget_get_default_style    (void);
1197 #ifndef GDK_MULTIHEAD_SAFE
1198 GdkColormap* gtk_widget_get_default_colormap (void);
1199 GdkVisual*   gtk_widget_get_default_visual   (void);
1200 #endif
1201
1202 /* Functions for setting directionality for widgets
1203  */
1204
1205 void             gtk_widget_set_direction         (GtkWidget        *widget,
1206                                                    GtkTextDirection  dir);
1207 GtkTextDirection gtk_widget_get_direction         (GtkWidget        *widget);
1208
1209 void             gtk_widget_set_default_direction (GtkTextDirection  dir);
1210 GtkTextDirection gtk_widget_get_default_direction (void);
1211
1212 /* Compositing manager functionality */
1213 gboolean gtk_widget_is_composited (GtkWidget *widget);
1214
1215 /* Counterpart to gdk_window_shape_combine_mask.
1216  */
1217 void         gtk_widget_shape_combine_mask (GtkWidget *widget,
1218                                             GdkBitmap *shape_mask,
1219                                             gint       offset_x,
1220                                             gint       offset_y);
1221 void         gtk_widget_input_shape_combine_mask (GtkWidget *widget,
1222                                                   GdkBitmap *shape_mask,
1223                                                   gint       offset_x,
1224                                                   gint       offset_y);
1225
1226 /* internal function */
1227 void         gtk_widget_reset_shapes       (GtkWidget *widget);
1228
1229 /* Compute a widget's path in the form "GtkWindow.MyLabel", and
1230  * return newly alocated strings.
1231  */
1232 void         gtk_widget_path               (GtkWidget *widget,
1233                                             guint     *path_length,
1234                                             gchar    **path,
1235                                             gchar    **path_reversed);
1236 void         gtk_widget_class_path         (GtkWidget *widget,
1237                                             guint     *path_length,
1238                                             gchar    **path,
1239                                             gchar    **path_reversed);
1240
1241 GList* gtk_widget_list_mnemonic_labels  (GtkWidget *widget);
1242 void   gtk_widget_add_mnemonic_label    (GtkWidget *widget,
1243                                          GtkWidget *label);
1244 void   gtk_widget_remove_mnemonic_label (GtkWidget *widget,
1245                                          GtkWidget *label);
1246
1247 void                  gtk_widget_set_tooltip_window    (GtkWidget   *widget,
1248                                                         GtkWindow   *custom_window);
1249 GtkWindow *gtk_widget_get_tooltip_window    (GtkWidget   *widget);
1250 void       gtk_widget_trigger_tooltip_query (GtkWidget   *widget);
1251 void       gtk_widget_set_tooltip_text      (GtkWidget   *widget,
1252                                              const gchar *text);
1253 gchar *    gtk_widget_get_tooltip_text      (GtkWidget   *widget);
1254 void       gtk_widget_set_tooltip_markup    (GtkWidget   *widget,
1255                                              const gchar *markup);
1256 gchar *    gtk_widget_get_tooltip_markup    (GtkWidget   *widget);
1257 void       gtk_widget_set_has_tooltip       (GtkWidget   *widget,
1258                                              gboolean     has_tooltip);
1259 gboolean   gtk_widget_get_has_tooltip       (GtkWidget   *widget);
1260
1261 GType           gtk_requisition_get_type (void) G_GNUC_CONST;
1262 GtkRequisition *gtk_requisition_copy     (const GtkRequisition *requisition);
1263 void            gtk_requisition_free     (GtkRequisition       *requisition);
1264
1265 #if     defined (GTK_TRACE_OBJECTS) && defined (__GNUC__)
1266 #  define gtk_widget_ref g_object_ref
1267 #  define gtk_widget_unref g_object_unref
1268 #endif  /* GTK_TRACE_OBJECTS && __GNUC__ */
1269
1270 void              _gtk_widget_grab_notify                 (GtkWidget    *widget,
1271                                                            gboolean     was_grabbed);
1272
1273 GtkWidgetAuxInfo *_gtk_widget_get_aux_info                (GtkWidget    *widget,
1274                                                            gboolean      create);
1275 void              _gtk_widget_propagate_hierarchy_changed (GtkWidget    *widget,
1276                                                            GtkWidget    *previous_toplevel);
1277 void              _gtk_widget_propagate_screen_changed    (GtkWidget    *widget,
1278                                                            GdkScreen    *previous_screen);
1279 void              _gtk_widget_propagate_composited_changed (GtkWidget    *widget);
1280
1281 void       _gtk_widget_set_pointer_window  (GtkWidget      *widget,
1282                                             GdkWindow      *pointer_window);
1283 GdkWindow *_gtk_widget_get_pointer_window  (GtkWidget      *widget);
1284 gboolean   _gtk_widget_is_pointer_widget   (GtkWidget      *widget);
1285 void       _gtk_widget_synthesize_crossing (GtkWidget      *from,
1286                                             GtkWidget      *to,
1287                                             GdkCrossingMode mode);
1288
1289 GdkColormap* _gtk_widget_peek_colormap (void);
1290
1291 void         _gtk_widget_buildable_finish_accelerator (GtkWidget *widget,
1292                                                        GtkWidget *toplevel,
1293                                                        gpointer   user_data);
1294
1295 G_END_DECLS
1296
1297 #endif /* __GTK_WIDGET_H__ */