Pileus Git - ~andy/gtk/blob - gtk/gtkcellarea.h

   1 /* gtkcellarea.h
   2  *
   3  * Copyright (C) 2010 Openismus GmbH
   4  *
   5  * Authors:
   6  *      Tristan Van Berkom <tristanvb@openismus.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #ifndef __GTK_CELL_AREA_H__
  23 #define __GTK_CELL_AREA_H__
  24
  25 #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  26 #error "Only <gtk/gtk.h> can be included directly."
  27 #endif
  28
  29 #include <gtk/gtkcellrenderer.h>
  30 #include <gtk/gtkwidget.h>
  31 #include <gtk/gtktreemodel.h>
  32
  33 G_BEGIN_DECLS
  34
  35 #define GTK_TYPE_CELL_AREA                (gtk_cell_area_get_type ())
  36 #define GTK_CELL_AREA(obj)                (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_CELL_AREA, GtkCellArea))
  37 #define GTK_CELL_AREA_CLASS(klass)        (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
  38 #define GTK_IS_CELL_AREA(obj)     (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_CELL_AREA))
  39 #define GTK_IS_CELL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CELL_AREA))
  40 #define GTK_CELL_AREA_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
  41
  42 typedef struct _GtkCellArea              GtkCellArea;
  43 typedef struct _GtkCellAreaClass         GtkCellAreaClass;
  44 typedef struct _GtkCellAreaPrivate       GtkCellAreaPrivate;
  45 typedef struct _GtkCellAreaContext       GtkCellAreaContext;
  46
  47 /**
  48  * GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID:
  49  * @object: the #GObject on which set_cell_property() or get_get_property()
  50  *     was called
  51  * @property_id: the numeric id of the property
  52  * @pspec: the #GParamSpec of the property
  53  *
  54  * This macro should be used to emit a standard warning about unexpected
  55  * properties in set_cell_property() and get_cell_property() implementations.
  56  */
  57 #define GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID(object, property_id, pspec) \
  58   G_OBJECT_WARN_INVALID_PSPEC ((object), "cell property id", (property_id), (pspec))
  59
  60 /**
  61  * GtkCellCallback:
  62  * @renderer: the cell renderer to operate on
  63  * @data: (closure): user-supplied data
  64  *
  65  * The type of the callback functions used for iterating over
  66  * the cell renderers of a #GtkCellArea, see gtk_cell_area_foreach().
  67  *
  68  * Return value: %TRUE to stop iterating over cells.
  69  */
  70 typedef gboolean    (*GtkCellCallback) (GtkCellRenderer  *renderer,
  71                                         gpointer          data);
  72
  73 /**
  74  * GtkCellAllocCallback:
  75  * @renderer: the cell renderer to operate on
  76  * @cell_area: the area allocated to @renderer inside the rectangle
  77  *     provided to gtk_cell_area_foreach_alloc().
  78  * @cell_background: the background area for @renderer inside the
  79  *     background area provided to gtk_cell_area_foreach_alloc().
  80  * @data: (closure): user-supplied data
  81  *
  82  * The type of the callback functions used for iterating over the
  83  * cell renderers and their allocated areas inside a #GtkCellArea,
  84  * see gtk_cell_area_foreach_alloc().
  85  *
  86  * Return value: %TRUE to stop iterating over cells.
  87  */
  88 typedef gboolean    (*GtkCellAllocCallback) (GtkCellRenderer    *renderer,
  89                                              const GdkRectangle *cell_area,
  90                                              const GdkRectangle *cell_background,
  91                                              gpointer            data);
  92
  93
  94 struct _GtkCellArea
  95 {
  96   /*< private >*/
  97   GInitiallyUnowned parent_instance;
  98
  99   GtkCellAreaPrivate *priv;
 100 };
 101
 102
 103 /**
 104  * GtkCellAreaClass:
 105  * @add: adds a #GtkCellRenderer to the area.
 106  * @remove: removes a #GtkCellRenderer from the area.
 107  * @foreach: calls the #GtkCellCallback function on every #GtkCellRenderer in
 108  *     the area with the provided user data until the callback returns %TRUE.
 109  * @foreach_alloc: Calls the #GtkCellAllocCallback function on every
 110  *     #GtkCellRenderer in the area with the allocated area for the cell
 111  *     and the provided user data until the callback returns %TRUE.
 112  * @event: Handle an event in the area, this is generally used to activate
 113  *     a cell at the event location for button events but can also be used
 114  *     to generically pass events to #GtkWidgets drawn onto the area.
 115  * @render: Actually render the area's cells to the specified rectangle,
 116  *     @background_area should be correctly distributed to the cells
 117  *     corresponding background areas.
 118  * @apply_attributes: Apply the cell attributes to the cells. This is
 119  *     implemented as a signal and generally #GtkCellArea subclasses don't
 120  *     need to implement it since it is handled by the base class.
 121  * @create_context: Creates and returns a class specific #GtkCellAreaContext
 122  *     to store cell alignment and allocation details for a said #GtkCellArea
 123  *     class.
 124  * @copy_context: Creates a new #GtkCellAreaContext in the same state as
 125  *     the passed @context with any cell alignment data and allocations intact.
 126  * @get_request_mode: This allows an area to tell its layouting widget whether
 127  *     it prefers to be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
 128  *     %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
 129  * @get_preferred_width: Calculates the minimum and natural width of the
 130  *     areas cells with the current attributes applied while considering
 131  *     the particular layouting details of the said #GtkCellArea. While
 132  *     requests are performed over a series of rows, alignments and overall
 133  *     minimum and natural sizes should be stored in the corresponding
 134  *     #GtkCellAreaContext.
 135  * @get_preferred_height_for_width: Calculates the minimum and natural height
 136  *     for the area if the passed @context would be allocated the given width.
 137  *     When implementing this virtual method it is safe to assume that @context
 138  *     has already stored the aligned cell widths for every #GtkTreeModel row
 139  *     that @context will be allocated for since this information was stored
 140  *     at #GtkCellAreaClass.get_preferred_width() time. This virtual method
 141  *     should also store any necessary alignments of cell heights for the
 142  *     case that the context is allocated a height.
 143  * @get_preferred_height: Calculates the minimum and natural height of the
 144  *     areas cells with the current attributes applied. Essentially this is
 145  *     the same as #GtkCellAreaClass.get_preferred_width() only for areas
 146  *     that are being requested as %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT.
 147  * @get_preferred_width_for_height: Calculates the minimum and natural width
 148  *     for the area if the passed @context would be allocated the given
 149  *     height. The same as #GtkCellAreaClass.get_preferred_height_for_width()
 150  *     only for handling requests in the %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT
 151  *     mode.
 152  * @set_cell_property: This should be implemented to handle changes in child
 153  *     cell properties for a given #GtkCellRenderer that were previously
 154  *     installed on the #GtkCellAreaClass with gtk_cell_area_class_install_cell_property().
 155  * @get_cell_property: This should be implemented to report the values of
 156  *     child cell properties for a given child #GtkCellRenderer.
 157  * @focus: This virtual method should be implemented to navigate focus from
 158  *     cell to cell inside the #GtkCellArea. The #GtkCellArea should move
 159  *     focus from cell to cell inside the area and return %FALSE if focus
 160  *     logically leaves the area with the following exceptions: When the
 161  *     area contains no activatable cells, the entire area recieves focus.
 162  *     Focus should not be given to cells that are actually "focus siblings"
 163  *     of other sibling cells (see gtk_cell_area_get_focus_from_sibling()).
 164  *     Focus is set by calling gtk_cell_area_set_focus_cell().
 165  * @is_activatable: Returns whether the #GtkCellArea can respond to
 166  *     #GtkCellAreaClass.activate(), usually this does not need to be
 167  *     implemented since the base class takes care of this however it can
 168  *     be enhanced if the #GtkCellArea subclass can handle activation in
 169  *     other ways than activating its #GtkCellRenderers.
 170  * @activate: This is called when the layouting widget rendering the
 171  *     #GtkCellArea activates the focus cell (see gtk_cell_area_get_focus_cell()).
 172  */
 173 struct _GtkCellAreaClass
 174 {
 175   /*< private >*/
 176   GInitiallyUnownedClass parent_class;
 177
 178   /*< public >*/
 179
 180   /* Basic methods */
 181   void               (* add)                             (GtkCellArea             *area,
 182                                                           GtkCellRenderer         *renderer);
 183   void               (* remove)                          (GtkCellArea             *area,
 184                                                           GtkCellRenderer         *renderer);
 185   void               (* foreach)                         (GtkCellArea             *area,
 186                                                           GtkCellCallback          callback,
 187                                                           gpointer                 callback_data);
 188   void               (* foreach_alloc)                   (GtkCellArea             *area,
 189                                                           GtkCellAreaContext      *context,
 190                                                           GtkWidget               *widget,
 191                                                           const GdkRectangle      *cell_area,
 192                                                           const GdkRectangle      *background_area,
 193                                                           GtkCellAllocCallback     callback,
 194                                                           gpointer                 callback_data);
 195   gint               (* event)                           (GtkCellArea             *area,
 196                                                           GtkCellAreaContext      *context,
 197                                                           GtkWidget               *widget,
 198                                                           GdkEvent                *event,
 199                                                           const GdkRectangle      *cell_area,
 200                                                           GtkCellRendererState     flags);
 201   void               (* render)                          (GtkCellArea             *area,
 202                                                           GtkCellAreaContext      *context,
 203                                                           GtkWidget               *widget,
 204                                                           cairo_t                 *cr,
 205                                                           const GdkRectangle      *background_area,
 206                                                           const GdkRectangle      *cell_area,
 207                                                           GtkCellRendererState     flags,
 208                                                           gboolean                 paint_focus);
 209   void               (* apply_attributes)                (GtkCellArea             *area,
 210                                                           GtkTreeModel            *tree_model,
 211                                                           GtkTreeIter             *iter,
 212                                                           gboolean                 is_expander,
 213                                                           gboolean                 is_expanded);
 214
 215   /* Geometry */
 216   GtkCellAreaContext *(* create_context)                 (GtkCellArea             *area);
 217   GtkCellAreaContext *(* copy_context)                   (GtkCellArea             *area,
 218                                                           GtkCellAreaContext      *context);
 219   GtkSizeRequestMode (* get_request_mode)                (GtkCellArea             *area);
 220   void               (* get_preferred_width)             (GtkCellArea             *area,
 221                                                           GtkCellAreaContext      *context,
 222                                                           GtkWidget               *widget,
 223                                                           gint                    *minimum_width,
 224                                                           gint                    *natural_width);
 225   void               (* get_preferred_height_for_width)  (GtkCellArea             *area,
 226                                                           GtkCellAreaContext      *context,
 227                                                           GtkWidget               *widget,
 228                                                           gint                     width,
 229                                                           gint                    *minimum_height,
 230                                                           gint                    *natural_height);
 231   void               (* get_preferred_height)            (GtkCellArea             *area,
 232                                                           GtkCellAreaContext      *context,
 233                                                           GtkWidget               *widget,
 234                                                           gint                    *minimum_height,
 235                                                           gint                    *natural_height);
 236   void               (* get_preferred_width_for_height)  (GtkCellArea             *area,
 237                                                           GtkCellAreaContext      *context,
 238                                                           GtkWidget               *widget,
 239                                                           gint                     height,
 240                                                           gint                    *minimum_width,
 241                                                           gint                    *natural_width);
 242
 243   /* Cell Properties */
 244   void               (* set_cell_property)               (GtkCellArea             *area,
 245                                                           GtkCellRenderer         *renderer,
 246                                                           guint                    property_id,
 247                                                           const GValue            *value,
 248                                                           GParamSpec              *pspec);
 249   void               (* get_cell_property)               (GtkCellArea             *area,
 250                                                           GtkCellRenderer         *renderer,
 251                                                           guint                    property_id,
 252                                                           GValue                  *value,
 253                                                           GParamSpec              *pspec);
 254
 255   /* Focus */
 256   gboolean           (* focus)                           (GtkCellArea             *area,
 257                                                           GtkDirectionType         direction);
 258   gboolean           (* is_activatable)                  (GtkCellArea             *area);
 259   gboolean           (* activate)                        (GtkCellArea             *area,
 260                                                           GtkCellAreaContext      *context,
 261                                                           GtkWidget               *widget,
 262                                                           const GdkRectangle      *cell_area,
 263                                                           GtkCellRendererState     flags,
 264                                                           gboolean                 edit_only);
 265
 266   /*< private >*/
 267
 268   /* Padding for future expansion */
 269   void (*_gtk_reserved1) (void);
 270   void (*_gtk_reserved2) (void);
 271   void (*_gtk_reserved3) (void);
 272   void (*_gtk_reserved4) (void);
 273   void (*_gtk_reserved5) (void);
 274   void (*_gtk_reserved6) (void);
 275   void (*_gtk_reserved7) (void);
 276   void (*_gtk_reserved8) (void);
 277 };
 278
 279 GType                 gtk_cell_area_get_type                       (void) G_GNUC_CONST;
 280
 281 /* Basic methods */
 282 void                  gtk_cell_area_add                            (GtkCellArea          *area,
 283                                                                     GtkCellRenderer      *renderer);
 284 void                  gtk_cell_area_remove                         (GtkCellArea          *area,
 285                                                                     GtkCellRenderer      *renderer);
 286 gboolean              gtk_cell_area_has_renderer                   (GtkCellArea          *area,
 287                                                                     GtkCellRenderer      *renderer);
 288 void                  gtk_cell_area_foreach                        (GtkCellArea          *area,
 289                                                                     GtkCellCallback       callback,
 290                                                                     gpointer              callback_data);
 291 void                  gtk_cell_area_foreach_alloc                  (GtkCellArea          *area,
 292                                                                     GtkCellAreaContext   *context,
 293                                                                     GtkWidget            *widget,
 294                                                                     const GdkRectangle   *cell_area,
 295                                                                     const GdkRectangle   *background_area,
 296                                                                     GtkCellAllocCallback  callback,
 297                                                                     gpointer              callback_data);
 298 gint                  gtk_cell_area_event                          (GtkCellArea          *area,
 299                                                                     GtkCellAreaContext   *context,
 300                                                                     GtkWidget            *widget,
 301                                                                     GdkEvent             *event,
 302                                                                     const GdkRectangle   *cell_area,
 303                                                                     GtkCellRendererState  flags);
 304 void                  gtk_cell_area_render                         (GtkCellArea          *area,
 305                                                                     GtkCellAreaContext   *context,
 306                                                                     GtkWidget            *widget,
 307                                                                     cairo_t              *cr,
 308                                                                     const GdkRectangle   *background_area,
 309                                                                     const GdkRectangle   *cell_area,
 310                                                                     GtkCellRendererState  flags,
 311                                                                     gboolean              paint_focus);
 312
 313 void                  gtk_cell_area_get_cell_allocation            (GtkCellArea          *area,
 314                                                                     GtkCellAreaContext   *context,
 315                                                                     GtkWidget            *widget,
 316                                                                     GtkCellRenderer      *renderer,
 317                                                                     const GdkRectangle   *cell_area,
 318                                                                     GdkRectangle         *allocation);
 319 GtkCellRenderer      *gtk_cell_area_get_cell_at_position           (GtkCellArea          *area,
 320                                                                     GtkCellAreaContext   *context,
 321                                                                     GtkWidget            *widget,
 322                                                                     const GdkRectangle   *cell_area,
 323                                                                     gint                  x,
 324                                                                     gint                  y,
 325                                                                     GdkRectangle         *alloc_area);
 326
 327 /* Geometry */
 328 GtkCellAreaContext   *gtk_cell_area_create_context                 (GtkCellArea        *area);
 329 GtkCellAreaContext   *gtk_cell_area_copy_context                   (GtkCellArea        *area,
 330                                                                     GtkCellAreaContext *context);
 331 GtkSizeRequestMode    gtk_cell_area_get_request_mode               (GtkCellArea        *area);
 332 void                  gtk_cell_area_get_preferred_width            (GtkCellArea        *area,
 333                                                                     GtkCellAreaContext *context,
 334                                                                     GtkWidget          *widget,
 335                                                                     gint               *minimum_width,
 336                                                                     gint               *natural_width);
 337 void                  gtk_cell_area_get_preferred_height_for_width (GtkCellArea        *area,
 338                                                                     GtkCellAreaContext *context,
 339                                                                     GtkWidget          *widget,
 340                                                                     gint                width,
 341                                                                     gint               *minimum_height,
 342                                                                     gint               *natural_height);
 343 void                  gtk_cell_area_get_preferred_height           (GtkCellArea        *area,
 344                                                                     GtkCellAreaContext *context,
 345                                                                     GtkWidget          *widget,
 346                                                                     gint               *minimum_height,
 347                                                                     gint               *natural_height);
 348 void                  gtk_cell_area_get_preferred_width_for_height (GtkCellArea        *area,
 349                                                                     GtkCellAreaContext *context,
 350                                                                     GtkWidget          *widget,
 351                                                                     gint                height,
 352                                                                     gint               *minimum_width,
 353                                                                     gint               *natural_width);
 354 const gchar *         gtk_cell_area_get_current_path_string        (GtkCellArea        *area);
 355
 356
 357 /* Attributes */
 358 void                  gtk_cell_area_apply_attributes               (GtkCellArea        *area,
 359                                                                     GtkTreeModel       *tree_model,
 360                                                                     GtkTreeIter        *iter,
 361                                                                     gboolean            is_expander,
 362                                                                     gboolean            is_expanded);
 363 void                  gtk_cell_area_attribute_connect              (GtkCellArea        *area,
 364                                                                     GtkCellRenderer    *renderer,
 365                                                                     const gchar        *attribute,
 366                                                                     gint                column);
 367 void                  gtk_cell_area_attribute_disconnect           (GtkCellArea        *area,
 368                                                                     GtkCellRenderer    *renderer,
 369                                                                     const gchar        *attribute);
 370
 371 /* Cell Properties */
 372 void                  gtk_cell_area_class_install_cell_property    (GtkCellAreaClass   *aclass,
 373                                                                     guint               property_id,
 374                                                                     GParamSpec         *pspec);
 375 GParamSpec*           gtk_cell_area_class_find_cell_property       (GtkCellAreaClass   *aclass,
 376                                                                     const gchar        *property_name);
 377 GParamSpec**          gtk_cell_area_class_list_cell_properties     (GtkCellAreaClass   *aclass,
 378                                                                     guint                   *n_properties);
 379 void                  gtk_cell_area_add_with_properties            (GtkCellArea        *area,
 380                                                                     GtkCellRenderer    *renderer,
 381                                                                     const gchar     *first_prop_name,
 382                                                                     ...) G_GNUC_NULL_TERMINATED;
 383 void                  gtk_cell_area_cell_set                       (GtkCellArea        *area,
 384                                                                     GtkCellRenderer    *renderer,
 385                                                                     const gchar        *first_prop_name,
 386                                                                     ...) G_GNUC_NULL_TERMINATED;
 387 void                  gtk_cell_area_cell_get                       (GtkCellArea        *area,
 388                                                                     GtkCellRenderer    *renderer,
 389                                                                     const gchar        *first_prop_name,
 390                                                                     ...) G_GNUC_NULL_TERMINATED;
 391 void                  gtk_cell_area_cell_set_valist                (GtkCellArea        *area,
 392                                                                     GtkCellRenderer    *renderer,
 393                                                                     const gchar        *first_property_name,
 394                                                                     va_list             var_args);
 395 void                  gtk_cell_area_cell_get_valist                (GtkCellArea        *area,
 396                                                                     GtkCellRenderer    *renderer,
 397                                                                     const gchar        *first_property_name,
 398                                                                     va_list             var_args);
 399 void                  gtk_cell_area_cell_set_property              (GtkCellArea        *area,
 400                                                                     GtkCellRenderer    *renderer,
 401                                                                     const gchar        *property_name,
 402                                                                     const GValue       *value);
 403 void                  gtk_cell_area_cell_get_property              (GtkCellArea        *area,
 404                                                                     GtkCellRenderer    *renderer,
 405                                                                     const gchar        *property_name,
 406                                                                     GValue             *value);
 407
 408 /* Focus */
 409 gboolean              gtk_cell_area_is_activatable                 (GtkCellArea         *area);
 410 gboolean              gtk_cell_area_activate                       (GtkCellArea         *area,
 411                                                                     GtkCellAreaContext  *context,
 412                                                                     GtkWidget           *widget,
 413                                                                     const GdkRectangle  *cell_area,
 414                                                                     GtkCellRendererState flags,
 415                                                                     gboolean             edit_only);
 416 gboolean              gtk_cell_area_focus                          (GtkCellArea         *area,
 417                                                                     GtkDirectionType     direction);
 418 void                  gtk_cell_area_set_focus_cell                 (GtkCellArea          *area,
 419                                                                     GtkCellRenderer      *renderer);
 420 GtkCellRenderer      *gtk_cell_area_get_focus_cell                 (GtkCellArea          *area);
 421
 422
 423 /* Focus siblings */
 424 void                  gtk_cell_area_add_focus_sibling              (GtkCellArea          *area,
 425                                                                     GtkCellRenderer      *renderer,
 426                                                                     GtkCellRenderer      *sibling);
 427 void                  gtk_cell_area_remove_focus_sibling           (GtkCellArea          *area,
 428                                                                     GtkCellRenderer      *renderer,
 429                                                                     GtkCellRenderer      *sibling);
 430 gboolean              gtk_cell_area_is_focus_sibling               (GtkCellArea          *area,
 431                                                                     GtkCellRenderer      *renderer,
 432                                                                     GtkCellRenderer      *sibling);
 433 const GList *         gtk_cell_area_get_focus_siblings             (GtkCellArea          *area,
 434                                                                     GtkCellRenderer      *renderer);
 435 GtkCellRenderer      *gtk_cell_area_get_focus_from_sibling         (GtkCellArea          *area,
 436                                                                     GtkCellRenderer      *renderer);
 437
 438 /* Cell Activation/Editing */
 439 GtkCellRenderer      *gtk_cell_area_get_edited_cell                (GtkCellArea          *area);
 440 GtkCellEditable      *gtk_cell_area_get_edit_widget                (GtkCellArea          *area);
 441 gboolean              gtk_cell_area_activate_cell                  (GtkCellArea          *area,
 442                                                                     GtkWidget            *widget,
 443                                                                     GtkCellRenderer      *renderer,
 444                                                                     GdkEvent             *event,
 445                                                                     const GdkRectangle   *cell_area,
 446                                                                     GtkCellRendererState  flags);
 447 void                  gtk_cell_area_stop_editing                   (GtkCellArea          *area,
 448                                                                     gboolean              canceled);
 449
 450 /* Functions for area implementations */
 451
 452 /* Distinguish the inner cell area from the whole requested area including margins */
 453 void                  gtk_cell_area_inner_cell_area                (GtkCellArea        *area,
 454                                                                     GtkWidget          *widget,
 455                                                                     const GdkRectangle *cell_area,
 456                                                                     GdkRectangle       *inner_area);
 457
 458 /* Request the size of a cell while respecting the cell margins (requests are margin inclusive) */
 459 void                  gtk_cell_area_request_renderer               (GtkCellArea        *area,
 460                                                                     GtkCellRenderer    *renderer,
 461                                                                     GtkOrientation      orientation,
 462                                                                     GtkWidget          *widget,
 463                                                                     gint                for_size,
 464                                                                     gint               *minimum_size,
 465                                                                     gint               *natural_size);
 466
 467 /* For api stability, this is called from gtkcelllayout.c in order to ensure the correct
 468  * object is passed to the user function in gtk_cell_layout_set_cell_data_func.
 469  *
 470  * This private api takes gpointer & GFunc arguments to circumvent circular header file
 471  * dependancies.
 472  */
 473 void                 _gtk_cell_area_set_cell_data_func_with_proxy  (GtkCellArea           *area,
 474                                                                     GtkCellRenderer       *cell,
 475                                                                     GFunc                  func,
 476                                                                     gpointer               func_data,
 477                                                                     GDestroyNotify         destroy,
 478                                                                     gpointer               proxy);
 479
 480 G_END_DECLS
 481
 482 #endif /* __GTK_CELL_AREA_H__ */