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, write to the
  20  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  */
  23
  24 #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  25 #error "Only <gtk/gtk.h> can be included directly."
  26 #endif
  27
  28 #ifndef __GTK_CELL_AREA_H__
  29 #define __GTK_CELL_AREA_H__
  30
  31 #include <gtk/gtkcellrenderer.h>
  32 #include <gtk/gtkwidget.h>
  33 #include <gtk/gtktreemodel.h>
  34
  35 G_BEGIN_DECLS
  36
  37 #define GTK_TYPE_CELL_AREA                (gtk_cell_area_get_type ())
  38 #define GTK_CELL_AREA(obj)                (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_CELL_AREA, GtkCellArea))
  39 #define GTK_CELL_AREA_CLASS(klass)        (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
  40 #define GTK_IS_CELL_AREA(obj)     (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_CELL_AREA))
  41 #define GTK_IS_CELL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CELL_AREA))
  42 #define GTK_CELL_AREA_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
  43
  44 typedef struct _GtkCellArea              GtkCellArea;
  45 typedef struct _GtkCellAreaClass         GtkCellAreaClass;
  46 typedef struct _GtkCellAreaPrivate       GtkCellAreaPrivate;
  47 typedef struct _GtkCellAreaContext       GtkCellAreaContext;
  48
  49 /**
  50  * GtkCellCallback:
  51  * @renderer: the cell renderer to operate on
  52  * @data: user-supplied data
  53  *
  54  * The type of the callback functions used for iterating over
  55  * the cell renderers of a #GtkCellArea, see gtk_cell_area_forall().
  56  */
  57 typedef void    (*GtkCellCallback)     (GtkCellRenderer  *renderer,
  58                                         gpointer          data);
  59
  60
  61 struct _GtkCellArea
  62 {
  63   /*< private >*/
  64   GInitiallyUnowned parent_instance;
  65
  66   GtkCellAreaPrivate *priv;
  67 };
  68
  69
  70 /**
  71  * GtkCellAreaClass:
  72  * @add: adds a #GtkCellRenderer to the area.
  73  * @remove: removes a #GtkCellRenderer from the area.
  74  * @forall: Calls the #GtkCellCallback function on every #GtkCellRenderer in the area
  75  * with the provided user data.
  76  * @get_cell_allocation: Gets the position (relative to the passed @cell_area rectangle)
  77  * and size of a #GtkCellRenderer.
  78  * @event: Handle an event in the area, this is generally used to activate a cell
  79  * at the event location for button events but can also be used to generically pass
  80  * events to #GtkWidgets drawn onto the area.
  81  * @render: Actually render the area's cells to the specified rectangle, @background_area
  82  * should be correctly distributed to the cells coresponding background areas.
  83  * @apply_attributes: Apply the cell attributes to the cells. This is implemented as a signal and
  84  * generally #GtkCellArea subclasses dont need to implement this since it's handled by the base
  85  * class but can be overridden to apply some custom attributes.
  86  * @create_context: Creates and returns a class specific #GtkCellAreaContext to store cell
  87  * alignment and allocation details for a said #GtkCellArea class.
  88  * @get_request_mode: This allows an area to tell its layouting widget whether it prefers to
  89  * be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
  90  * @get_preferred_width: Calculates the minimum and natural width of the area's cells
  91  * with the current attributes applied while considering the particular layouting details
  92  * of the said #GtkCellArea. While requests are performed over a series of rows, alignments
  93  * and overall minimum and natural sizes should be stored in the corresponding #GtkCellAreaContext.
  94  * @get_preferred_height_for_width: Calculates the minimum and natural height for the area
  95  * if the passed @context would be allocated the given width. When implementing this virtual
  96  * method it is safe to assume that @context has already stored the aligned cell widths
  97  * for every #GtkTreeModel row that @context will be allocated for since this information
  98  * was stored at #GtkCellAreaClass.get_preferred_width() time. This virtual method should
  99  * also store any necessary alignments of cell heights for the case that the context is
 100  * allocated a height.
 101  * @get_preferred_height: Calculates the minimum and natural height of the area's cells
 102  * with the current attributes applied. Essentially this is the same as
 103  * #GtkCellAreaClass.get_preferred_width() only for areas that are being requested as
 104  * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT.
 105  * @get_preferred_width_for_height: Calculates the minimum and natural width for the area
 106  * if the passed @context would be allocated the given height. The same as
 107  * #GtkCellAreaClass.get_preferred_height_for_width() only for handling requests in the
 108  * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
 109  * @set_cell_property: This should be implemented to handle changes in child cell properties
 110  * for a given #GtkCellRenderer that were previously installed on the #GtkCellAreaClass with
 111  * gtk_cell_area_class_install_cell_property().
 112  * @get_cell_property: This should be implemented to report the values of child cell properties
 113  * for a given child #GtkCellRenderer.
 114  * @focus: This virtual method should be implemented to navigate focus from cell to cell
 115  * inside the #GtkCellArea. The #GtkCellArea should move focus from cell to cell inside
 116  * the area and return %FALSE if focus logically leaves the area with the following exceptions:
 117  * When the area contains no activatable cells, the entire area recieves focus. Focus should not
 118  * be given to cells that are actually "focus siblings" of other sibling cells
 119  * (see gtk_cell_area_get_focus_from_sibling()). Focus is set by calling gtk_cell_area_set_focus_cell().
 120  * @is_activatable: Returns whether the #GtkCellArea can respond to #GtkCellAreaClass.activate(),
 121  * usually this does not need to be implemented since the base class takes care of this however
 122  * it can be enhanced if the #GtkCellArea subclass can handle activation in other ways than
 123  * activating its #GtkCellRenderers.
 124  * @activate: This is called when the layouting widget rendering the #GtkCellArea activates
 125  * the focus cell (see gtk_cell_area_get_focus_cell()).
 126  */
 127 struct _GtkCellAreaClass
 128 {
 129   /*< private >*/
 130   GInitiallyUnownedClass parent_class;
 131
 132   /*< public >*/
 133
 134   /* Basic methods */
 135   void               (* add)                             (GtkCellArea             *area,
 136                                                           GtkCellRenderer         *renderer);
 137   void               (* remove)                          (GtkCellArea             *area,
 138                                                           GtkCellRenderer         *renderer);
 139   void               (* forall)                          (GtkCellArea             *area,
 140                                                           GtkCellCallback          callback,
 141                                                           gpointer                 callback_data);
 142   void               (* get_cell_allocation)             (GtkCellArea             *area,
 143                                                           GtkCellAreaContext      *context,
 144                                                           GtkWidget               *widget,
 145                                                           GtkCellRenderer         *renderer,
 146                                                           const GdkRectangle      *cell_area,
 147                                                           GdkRectangle            *allocation);
 148   gint               (* event)                           (GtkCellArea             *area,
 149                                                           GtkCellAreaContext      *context,
 150                                                           GtkWidget               *widget,
 151                                                           GdkEvent                *event,
 152                                                           const GdkRectangle      *cell_area,
 153                                                           GtkCellRendererState     flags);
 154   void               (* render)                          (GtkCellArea             *area,
 155                                                           GtkCellAreaContext      *context,
 156                                                           GtkWidget               *widget,
 157                                                           cairo_t                 *cr,
 158                                                           const GdkRectangle      *background_area,
 159                                                           const GdkRectangle      *cell_area,
 160                                                           GtkCellRendererState     flags,
 161                                                           gboolean                 paint_focus);
 162   void               (* apply_attributes)                (GtkCellArea             *area,
 163                                                           GtkTreeModel            *tree_model,
 164                                                           GtkTreeIter             *iter,
 165                                                           gboolean                 is_expander,
 166                                                           gboolean                 is_expanded);
 167
 168   /* Geometry */
 169   GtkCellAreaContext *(* create_context)                 (GtkCellArea             *area);
 170   GtkSizeRequestMode (* get_request_mode)                (GtkCellArea             *area);
 171   void               (* get_preferred_width)             (GtkCellArea             *area,
 172                                                           GtkCellAreaContext      *context,
 173                                                           GtkWidget               *widget,
 174                                                           gint                    *minimum_width,
 175                                                           gint                    *natural_width);
 176   void               (* get_preferred_height_for_width)  (GtkCellArea             *area,
 177                                                           GtkCellAreaContext      *context,
 178                                                           GtkWidget               *widget,
 179                                                           gint                     width,
 180                                                           gint                    *minimum_height,
 181                                                           gint                    *natural_height);
 182   void               (* get_preferred_height)            (GtkCellArea             *area,
 183                                                           GtkCellAreaContext      *context,
 184                                                           GtkWidget               *widget,
 185                                                           gint                    *minimum_height,
 186                                                           gint                    *natural_height);
 187   void               (* get_preferred_width_for_height)  (GtkCellArea             *area,
 188                                                           GtkCellAreaContext      *context,
 189                                                           GtkWidget               *widget,
 190                                                           gint                     height,
 191                                                           gint                    *minimum_width,
 192                                                           gint                    *natural_width);
 193
 194   /* Cell Properties */
 195   void               (* set_cell_property)               (GtkCellArea             *area,
 196                                                           GtkCellRenderer         *renderer,
 197                                                           guint                    property_id,
 198                                                           const GValue            *value,
 199                                                           GParamSpec              *pspec);
 200   void               (* get_cell_property)               (GtkCellArea             *area,
 201                                                           GtkCellRenderer         *renderer,
 202                                                           guint                    property_id,
 203                                                           GValue                  *value,
 204                                                           GParamSpec              *pspec);
 205
 206   /* Focus */
 207   gboolean           (* focus)                           (GtkCellArea             *area,
 208                                                           GtkDirectionType         direction);
 209   gboolean           (* is_activatable)                  (GtkCellArea             *area);
 210   gboolean           (* activate)                        (GtkCellArea             *area,
 211                                                           GtkCellAreaContext      *context,
 212                                                           GtkWidget               *widget,
 213                                                           const GdkRectangle      *cell_area,
 214                                                           GtkCellRendererState     flags);
 215
 216   /*< private >*/
 217
 218   /* Padding for future expansion */
 219   void (*_gtk_reserved1) (void);
 220   void (*_gtk_reserved2) (void);
 221   void (*_gtk_reserved3) (void);
 222   void (*_gtk_reserved4) (void);
 223   void (*_gtk_reserved5) (void);
 224   void (*_gtk_reserved6) (void);
 225   void (*_gtk_reserved7) (void);
 226   void (*_gtk_reserved8) (void);
 227 };
 228
 229 GType                 gtk_cell_area_get_type                       (void) G_GNUC_CONST;
 230
 231 /* Basic methods */
 232 void                  gtk_cell_area_add                            (GtkCellArea          *area,
 233                                                                     GtkCellRenderer      *renderer);
 234 void                  gtk_cell_area_remove                         (GtkCellArea          *area,
 235                                                                     GtkCellRenderer      *renderer);
 236 gboolean              gtk_cell_area_has_renderer                   (GtkCellArea          *area,
 237                                                                     GtkCellRenderer      *renderer);
 238 void                  gtk_cell_area_forall                         (GtkCellArea          *area,
 239                                                                     GtkCellCallback       callback,
 240                                                                     gpointer              callback_data);
 241 void                  gtk_cell_area_get_cell_allocation            (GtkCellArea          *area,
 242                                                                     GtkCellAreaContext   *context,
 243                                                                     GtkWidget            *widget,
 244                                                                     GtkCellRenderer      *renderer,
 245                                                                     const GdkRectangle   *cell_area,
 246                                                                     GdkRectangle         *allocation);
 247 gint                  gtk_cell_area_event                          (GtkCellArea          *area,
 248                                                                     GtkCellAreaContext   *context,
 249                                                                     GtkWidget            *widget,
 250                                                                     GdkEvent             *event,
 251                                                                     const GdkRectangle   *cell_area,
 252                                                                     GtkCellRendererState  flags);
 253 void                  gtk_cell_area_render                         (GtkCellArea          *area,
 254                                                                     GtkCellAreaContext   *context,
 255                                                                     GtkWidget            *widget,
 256                                                                     cairo_t              *cr,
 257                                                                     const GdkRectangle   *background_area,
 258                                                                     const GdkRectangle   *cell_area,
 259                                                                     GtkCellRendererState  flags,
 260                                                                     gboolean              paint_focus);
 261 void                  gtk_cell_area_set_style_detail               (GtkCellArea          *area,
 262                                                                     const gchar          *detail);
 263 G_CONST_RETURN gchar *gtk_cell_area_get_style_detail               (GtkCellArea          *area);
 264
 265 /* Geometry */
 266 GtkCellAreaContext   *gtk_cell_area_create_context                 (GtkCellArea        *area);
 267 GtkSizeRequestMode    gtk_cell_area_get_request_mode               (GtkCellArea        *area);
 268 void                  gtk_cell_area_get_preferred_width            (GtkCellArea        *area,
 269                                                                     GtkCellAreaContext *context,
 270                                                                     GtkWidget          *widget,
 271                                                                     gint               *minimum_size,
 272                                                                     gint               *natural_size);
 273 void                  gtk_cell_area_get_preferred_height_for_width (GtkCellArea        *area,
 274                                                                     GtkCellAreaContext *context,
 275                                                                     GtkWidget          *widget,
 276                                                                     gint                width,
 277                                                                     gint               *minimum_height,
 278                                                                     gint               *natural_height);
 279 void                  gtk_cell_area_get_preferred_height           (GtkCellArea        *area,
 280                                                                     GtkCellAreaContext *context,
 281                                                                     GtkWidget          *widget,
 282                                                                     gint               *minimum_size,
 283                                                                     gint               *natural_size);
 284 void                  gtk_cell_area_get_preferred_width_for_height (GtkCellArea        *area,
 285                                                                     GtkCellAreaContext *context,
 286                                                                     GtkWidget          *widget,
 287                                                                     gint                height,
 288                                                                     gint               *minimum_width,
 289                                                                     gint               *natural_width);
 290 G_CONST_RETURN gchar *gtk_cell_area_get_current_path_string        (GtkCellArea        *area);
 291
 292
 293 /* Attributes */
 294 void                  gtk_cell_area_apply_attributes               (GtkCellArea        *area,
 295                                                                     GtkTreeModel       *tree_model,
 296                                                                     GtkTreeIter        *iter,
 297                                                                     gboolean            is_expander,
 298                                                                     gboolean            is_expanded);
 299 void                  gtk_cell_area_attribute_connect              (GtkCellArea        *area,
 300                                                                     GtkCellRenderer    *renderer,
 301                                                                     const gchar        *attribute,
 302                                                                     gint                column);
 303 void                  gtk_cell_area_attribute_disconnect           (GtkCellArea        *area,
 304                                                                     GtkCellRenderer    *renderer,
 305                                                                     const gchar        *attribute);
 306
 307 /* Cell Properties */
 308 void                  gtk_cell_area_class_install_cell_property    (GtkCellAreaClass   *aclass,
 309                                                                     guint               property_id,
 310                                                                     GParamSpec         *pspec);
 311 GParamSpec*           gtk_cell_area_class_find_cell_property       (GtkCellAreaClass   *aclass,
 312                                                                     const gchar        *property_name);
 313 GParamSpec**          gtk_cell_area_class_list_cell_properties     (GtkCellAreaClass   *aclass,
 314                                                                     guint                   *n_properties);
 315 void                  gtk_cell_area_add_with_properties            (GtkCellArea        *area,
 316                                                                     GtkCellRenderer    *renderer,
 317                                                                     const gchar     *first_prop_name,
 318                                                                     ...) G_GNUC_NULL_TERMINATED;
 319 void                  gtk_cell_area_cell_set                       (GtkCellArea        *area,
 320                                                                     GtkCellRenderer    *renderer,
 321                                                                     const gchar        *first_prop_name,
 322                                                                     ...) G_GNUC_NULL_TERMINATED;
 323 void                  gtk_cell_area_cell_get                       (GtkCellArea        *area,
 324                                                                     GtkCellRenderer    *renderer,
 325                                                                     const gchar        *first_prop_name,
 326                                                                     ...) G_GNUC_NULL_TERMINATED;
 327 void                  gtk_cell_area_cell_set_valist                (GtkCellArea        *area,
 328                                                                     GtkCellRenderer    *renderer,
 329                                                                     const gchar        *first_property_name,
 330                                                                     va_list             var_args);
 331 void                  gtk_cell_area_cell_get_valist                (GtkCellArea        *area,
 332                                                                     GtkCellRenderer    *renderer,
 333                                                                     const gchar        *first_property_name,
 334                                                                     va_list             var_args);
 335 void                  gtk_cell_area_cell_set_property              (GtkCellArea        *area,
 336                                                                     GtkCellRenderer    *renderer,
 337                                                                     const gchar        *property_name,
 338                                                                     const GValue       *value);
 339 void                  gtk_cell_area_cell_get_property              (GtkCellArea        *area,
 340                                                                     GtkCellRenderer    *renderer,
 341                                                                     const gchar        *property_name,
 342                                                                     GValue             *value);
 343
 344 #define GTK_CELL_AREA_WARN_INVALID_CHILD_PROPERTY_ID(object, property_id, pspec) \
 345   G_OBJECT_WARN_INVALID_PSPEC ((object), "cell property id", (property_id), (pspec))
 346
 347
 348 /* Focus */
 349 gboolean              gtk_cell_area_is_activatable                 (GtkCellArea         *area);
 350 gboolean              gtk_cell_area_activate                       (GtkCellArea         *area,
 351                                                                     GtkCellAreaContext  *context,
 352                                                                     GtkWidget           *widget,
 353                                                                     const GdkRectangle  *cell_area,
 354                                                                     GtkCellRendererState flags);
 355 gboolean              gtk_cell_area_focus                          (GtkCellArea         *area,
 356                                                                     GtkDirectionType     direction);
 357 void                  gtk_cell_area_set_focus_cell                 (GtkCellArea          *area,
 358                                                                     GtkCellRenderer      *renderer);
 359 GtkCellRenderer      *gtk_cell_area_get_focus_cell                 (GtkCellArea          *area);
 360
 361
 362 /* Focus siblings */
 363 void                  gtk_cell_area_add_focus_sibling              (GtkCellArea          *area,
 364                                                                     GtkCellRenderer      *renderer,
 365                                                                     GtkCellRenderer      *sibling);
 366 void                  gtk_cell_area_remove_focus_sibling           (GtkCellArea          *area,
 367                                                                     GtkCellRenderer      *renderer,
 368                                                                     GtkCellRenderer      *sibling);
 369 gboolean              gtk_cell_area_is_focus_sibling               (GtkCellArea          *area,
 370                                                                     GtkCellRenderer      *renderer,
 371                                                                     GtkCellRenderer      *sibling);
 372 G_CONST_RETURN GList *gtk_cell_area_get_focus_siblings             (GtkCellArea          *area,
 373                                                                     GtkCellRenderer      *renderer);
 374 GtkCellRenderer      *gtk_cell_area_get_focus_from_sibling         (GtkCellArea          *area,
 375                                                                     GtkCellRenderer      *renderer);
 376
 377 /* Cell Activation/Editing */
 378 GtkCellRenderer      *gtk_cell_area_get_edited_cell                (GtkCellArea          *area);
 379 GtkCellEditable      *gtk_cell_area_get_edit_widget                (GtkCellArea          *area);
 380 gboolean              gtk_cell_area_activate_cell                  (GtkCellArea          *area,
 381                                                                     GtkWidget            *widget,
 382                                                                     GtkCellRenderer      *renderer,
 383                                                                     GdkEvent             *event,
 384                                                                     const GdkRectangle   *cell_area,
 385                                                                     GtkCellRendererState  flags);
 386 void                  gtk_cell_area_stop_editing                   (GtkCellArea          *area,
 387                                                                     gboolean              canceled);
 388
 389 /* Functions for area implementations */
 390
 391 /* Distinguish the inner cell area from the whole requested area including margins */
 392 void                  gtk_cell_area_inner_cell_area                (GtkCellArea        *area,
 393                                                                     GtkWidget          *widget,
 394                                                                     const GdkRectangle *cell_area,
 395                                                                     GdkRectangle       *inner_area);
 396
 397 /* Request the size of a cell while respecting the cell margins (requests are margin inclusive) */
 398 void                  gtk_cell_area_request_renderer               (GtkCellArea        *area,
 399                                                                     GtkCellRenderer    *renderer,
 400                                                                     GtkOrientation      orientation,
 401                                                                     GtkWidget          *widget,
 402                                                                     gint                for_size,
 403                                                                     gint               *minimum_size,
 404                                                                     gint               *natural_size);
 405
 406 G_END_DECLS
 407
 408 #endif /* __GTK_CELL_AREA_H__ */