Pileus Git - ~andy/gtk/blob - gtk/gtkcellrenderer.c

   1 /* gtkcellrenderer.c
   2  * Copyright (C) 2000  Red Hat, Inc. Jonathan Blandford
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21 #include "gtkcellrenderer.h"
  22 #include "gtkintl.h"
  23 #include "gtkmarshalers.h"
  24 #include "gtkprivate.h"
  25 #include "gtktreeprivate.h"
  26 #include "gtkalias.h"
  27
  28 static void gtk_cell_renderer_get_property  (GObject              *object,
  29                                              guint                 param_id,
  30                                              GValue               *value,
  31                                              GParamSpec           *pspec);
  32 static void gtk_cell_renderer_set_property  (GObject              *object,
  33                                              guint                 param_id,
  34                                              const GValue         *value,
  35                                              GParamSpec           *pspec);
  36 static void set_cell_bg_color               (GtkCellRenderer      *cell,
  37                                              GdkColor             *color);
  38
  39
  40 #define GTK_CELL_RENDERER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_CELL_RENDERER, GtkCellRendererPrivate))
  41
  42 typedef struct _GtkCellRendererPrivate GtkCellRendererPrivate;
  43 struct _GtkCellRendererPrivate
  44 {
  45   GdkColor cell_background;
  46 };
  47
  48
  49 enum {
  50   PROP_ZERO,
  51   PROP_MODE,
  52   PROP_VISIBLE,
  53   PROP_SENSITIVE,
  54   PROP_XALIGN,
  55   PROP_YALIGN,
  56   PROP_XPAD,
  57   PROP_YPAD,
  58   PROP_WIDTH,
  59   PROP_HEIGHT,
  60   PROP_IS_EXPANDER,
  61   PROP_IS_EXPANDED,
  62   PROP_CELL_BACKGROUND,
  63   PROP_CELL_BACKGROUND_GDK,
  64   PROP_CELL_BACKGROUND_SET
  65 };
  66
  67 /* Signal IDs */
  68 enum {
  69   EDITING_CANCELED,
  70   EDITING_STARTED,
  71   LAST_SIGNAL
  72 };
  73
  74 static guint cell_renderer_signals[LAST_SIGNAL] = { 0 };
  75
  76 G_DEFINE_ABSTRACT_TYPE (GtkCellRenderer, gtk_cell_renderer, GTK_TYPE_OBJECT);
  77
  78 static void
  79 gtk_cell_renderer_init (GtkCellRenderer *cell)
  80 {
  81   cell->mode = GTK_CELL_RENDERER_MODE_INERT;
  82   cell->visible = TRUE;
  83   cell->width = -1;
  84   cell->height = -1;
  85   cell->xalign = 0.5;
  86   cell->yalign = 0.5;
  87   cell->xpad = 0;
  88   cell->ypad = 0;
  89   cell->sensitive = TRUE;
  90   cell->is_expander = FALSE;
  91   cell->is_expanded = FALSE;
  92   cell->editing = FALSE;
  93 }
  94
  95 static void
  96 gtk_cell_renderer_class_init (GtkCellRendererClass *class)
  97 {
  98   GObjectClass *object_class = G_OBJECT_CLASS (class);
  99
 100   object_class->get_property = gtk_cell_renderer_get_property;
 101   object_class->set_property = gtk_cell_renderer_set_property;
 102
 103   class->render = NULL;
 104   class->get_size = NULL;
 105
 106   /**
 107    * GtkCellRenderer::editing-canceled:
 108    * @renderer: the object which received the signal
 109    *
 110    * This signal gets emitted when the user cancels the process of editing a
 111    * cell.  For example, an editable cell renderer could be written to cancel
 112    * editing when the user presses Escape.
 113    *
 114    * See also: gtk_cell_renderer_editing_canceled()
 115    *
 116    * Since: 2.4
 117    */
 118   cell_renderer_signals[EDITING_CANCELED] =
 119     g_signal_new (I_("editing-canceled"),
 120                   G_OBJECT_CLASS_TYPE (object_class),
 121                   G_SIGNAL_RUN_FIRST,
 122                   G_STRUCT_OFFSET (GtkCellRendererClass, editing_canceled),
 123                   NULL, NULL,
 124                   _gtk_marshal_VOID__VOID,
 125                   G_TYPE_NONE, 0);
 126
 127   /**
 128    * GtkCellRenderer::editing-started:
 129    * @renderer: the object which received the signal
 130    * @editable: the #GtkCellEditable
 131    * @path: the path identifying the edited cell
 132    *
 133    * This signal gets emitted when a cell starts to be edited.
 134    * The indended use of this signal is to do special setup
 135    * on @editable, e.g. adding a #GtkEntryCompletion or setting
 136    * up additional columns in a #GtkComboBox.
 137    *
 138    * Note that GTK+ doesn't guarantee that cell renderers will
 139    * continue to use the same kind of widget for editing in future
 140    * releases, therefore you should check the type of @editable
 141    * before doing any specific setup, as in the following example:
 142    *
 143    * <informalexample><programlisting>
 144    * static void
 145    * text_editing_started (GtkCellRenderer *cell,
 146    *                       GtkCellEditable *editable,
 147    *                       const gchar     *path,
 148    *                       gpointer         data)
 149    * {
 150    *   if (GTK_IS_ENTRY (editable))
 151    *     {
 152    *       GtkEntry *entry = GTK_ENTRY (editable);
 153    *       <!-- -->
 154    *       /<!-- -->* ... create a GtkEntryCompletion *<!-- -->/
 155    *       <!-- -->
 156    *       gtk_entry_set_completion (entry, completion);
 157    *     }
 158    * }
 159    * </programlisting></informalexample>
 160    *
 161    * Since: 2.6
 162    */
 163   cell_renderer_signals[EDITING_STARTED] =
 164     g_signal_new (I_("editing-started"),
 165                   G_OBJECT_CLASS_TYPE (object_class),
 166                   G_SIGNAL_RUN_FIRST,
 167                   G_STRUCT_OFFSET (GtkCellRendererClass, editing_started),
 168                   NULL, NULL,
 169                   _gtk_marshal_VOID__OBJECT_STRING,
 170                   G_TYPE_NONE, 2,
 171                   GTK_TYPE_CELL_EDITABLE,
 172                   G_TYPE_STRING);
 173
 174   g_object_class_install_property (object_class,
 175                                    PROP_MODE,
 176                                    g_param_spec_enum ("mode",
 177                                                       P_("mode"),
 178                                                       P_("Editable mode of the CellRenderer"),
 179                                                       GTK_TYPE_CELL_RENDERER_MODE,
 180                                                       GTK_CELL_RENDERER_MODE_INERT,
 181                                                       GTK_PARAM_READWRITE));
 182
 183   g_object_class_install_property (object_class,
 184                                    PROP_VISIBLE,
 185                                    g_param_spec_boolean ("visible",
 186                                                          P_("visible"),
 187                                                          P_("Display the cell"),
 188                                                          TRUE,
 189                                                          GTK_PARAM_READWRITE));
 190   g_object_class_install_property (object_class,
 191                                    PROP_SENSITIVE,
 192                                    g_param_spec_boolean ("sensitive",
 193                                                          P_("Sensitive"),
 194                                                          P_("Display the cell sensitive"),
 195                                                          TRUE,
 196                                                          GTK_PARAM_READWRITE));
 197
 198   g_object_class_install_property (object_class,
 199                                    PROP_XALIGN,
 200                                    g_param_spec_float ("xalign",
 201                                                        P_("xalign"),
 202                                                        P_("The x-align"),
 203                                                        0.0,
 204                                                        1.0,
 205                                                        0.5,
 206                                                        GTK_PARAM_READWRITE));
 207
 208   g_object_class_install_property (object_class,
 209                                    PROP_YALIGN,
 210                                    g_param_spec_float ("yalign",
 211                                                        P_("yalign"),
 212                                                        P_("The y-align"),
 213                                                        0.0,
 214                                                        1.0,
 215                                                        0.5,
 216                                                        GTK_PARAM_READWRITE));
 217
 218   g_object_class_install_property (object_class,
 219                                    PROP_XPAD,
 220                                    g_param_spec_uint ("xpad",
 221                                                       P_("xpad"),
 222                                                       P_("The xpad"),
 223                                                       0,
 224                                                       G_MAXUINT,
 225                                                       0,
 226                                                       GTK_PARAM_READWRITE));
 227
 228   g_object_class_install_property (object_class,
 229                                    PROP_YPAD,
 230                                    g_param_spec_uint ("ypad",
 231                                                       P_("ypad"),
 232                                                       P_("The ypad"),
 233                                                       0,
 234                                                       G_MAXUINT,
 235                                                       0,
 236                                                       GTK_PARAM_READWRITE));
 237
 238   g_object_class_install_property (object_class,
 239                                    PROP_WIDTH,
 240                                    g_param_spec_int ("width",
 241                                                      P_("width"),
 242                                                      P_("The fixed width"),
 243                                                      -1,
 244                                                      G_MAXINT,
 245                                                      -1,
 246                                                      GTK_PARAM_READWRITE));
 247
 248   g_object_class_install_property (object_class,
 249                                    PROP_HEIGHT,
 250                                    g_param_spec_int ("height",
 251                                                      P_("height"),
 252                                                      P_("The fixed height"),
 253                                                      -1,
 254                                                      G_MAXINT,
 255                                                      -1,
 256                                                      GTK_PARAM_READWRITE));
 257
 258   g_object_class_install_property (object_class,
 259                                    PROP_IS_EXPANDER,
 260                                    g_param_spec_boolean ("is-expander",
 261                                                          P_("Is Expander"),
 262                                                          P_("Row has children"),
 263                                                          FALSE,
 264                                                          GTK_PARAM_READWRITE));
 265
 266
 267   g_object_class_install_property (object_class,
 268                                    PROP_IS_EXPANDED,
 269                                    g_param_spec_boolean ("is-expanded",
 270                                                          P_("Is Expanded"),
 271                                                          P_("Row is an expander row, and is expanded"),
 272                                                          FALSE,
 273                                                          GTK_PARAM_READWRITE));
 274
 275   g_object_class_install_property (object_class,
 276                                    PROP_CELL_BACKGROUND,
 277                                    g_param_spec_string ("cell-background",
 278                                                         P_("Cell background color name"),
 279                                                         P_("Cell background color as a string"),
 280                                                         NULL,
 281                                                         GTK_PARAM_WRITABLE));
 282
 283   g_object_class_install_property (object_class,
 284                                    PROP_CELL_BACKGROUND_GDK,
 285                                    g_param_spec_boxed ("cell-background-gdk",
 286                                                        P_("Cell background color"),
 287                                                        P_("Cell background color as a GdkColor"),
 288                                                        GDK_TYPE_COLOR,
 289                                                        GTK_PARAM_READWRITE));
 290
 291
 292 #define ADD_SET_PROP(propname, propval, nick, blurb) g_object_class_install_property (object_class, propval, g_param_spec_boolean (propname, nick, blurb, FALSE, GTK_PARAM_READWRITE))
 293
 294   ADD_SET_PROP ("cell-background-set", PROP_CELL_BACKGROUND_SET,
 295                 P_("Cell background set"),
 296                 P_("Whether this tag affects the cell background color"));
 297
 298   g_type_class_add_private (object_class, sizeof (GtkCellRendererPrivate));
 299 }
 300
 301 static void
 302 gtk_cell_renderer_get_property (GObject     *object,
 303                                 guint        param_id,
 304                                 GValue      *value,
 305                                 GParamSpec  *pspec)
 306 {
 307   GtkCellRenderer *cell = GTK_CELL_RENDERER (object);
 308   GtkCellRendererPrivate *priv = GTK_CELL_RENDERER_GET_PRIVATE (object);
 309
 310   switch (param_id)
 311     {
 312     case PROP_MODE:
 313       g_value_set_enum (value, cell->mode);
 314       break;
 315     case PROP_VISIBLE:
 316       g_value_set_boolean (value, cell->visible);
 317       break;
 318     case PROP_SENSITIVE:
 319       g_value_set_boolean (value, cell->sensitive);
 320       break;
 321     case PROP_XALIGN:
 322       g_value_set_float (value, cell->xalign);
 323       break;
 324     case PROP_YALIGN:
 325       g_value_set_float (value, cell->yalign);
 326       break;
 327     case PROP_XPAD:
 328       g_value_set_uint (value, cell->xpad);
 329       break;
 330     case PROP_YPAD:
 331       g_value_set_uint (value, cell->ypad);
 332       break;
 333     case PROP_WIDTH:
 334       g_value_set_int (value, cell->width);
 335       break;
 336     case PROP_HEIGHT:
 337       g_value_set_int (value, cell->height);
 338       break;
 339     case PROP_IS_EXPANDER:
 340       g_value_set_boolean (value, cell->is_expander);
 341       break;
 342     case PROP_IS_EXPANDED:
 343       g_value_set_boolean (value, cell->is_expanded);
 344       break;
 345     case PROP_CELL_BACKGROUND_GDK:
 346       {
 347         GdkColor color;
 348
 349         color.red = priv->cell_background.red;
 350         color.green = priv->cell_background.green;
 351         color.blue = priv->cell_background.blue;
 352
 353         g_value_set_boxed (value, &color);
 354       }
 355       break;
 356     case PROP_CELL_BACKGROUND_SET:
 357       g_value_set_boolean (value, cell->cell_background_set);
 358       break;
 359     case PROP_CELL_BACKGROUND:
 360     default:
 361       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 362       break;
 363     }
 364
 365 }
 366
 367 static void
 368 gtk_cell_renderer_set_property (GObject      *object,
 369                                 guint         param_id,
 370                                 const GValue *value,
 371                                 GParamSpec   *pspec)
 372 {
 373   GtkCellRenderer *cell = GTK_CELL_RENDERER (object);
 374
 375   switch (param_id)
 376     {
 377     case PROP_MODE:
 378       cell->mode = g_value_get_enum (value);
 379       break;
 380     case PROP_VISIBLE:
 381       cell->visible = g_value_get_boolean (value);
 382       break;
 383     case PROP_SENSITIVE:
 384       cell->sensitive = g_value_get_boolean (value);
 385       break;
 386     case PROP_XALIGN:
 387       cell->xalign = g_value_get_float (value);
 388       break;
 389     case PROP_YALIGN:
 390       cell->yalign = g_value_get_float (value);
 391       break;
 392     case PROP_XPAD:
 393       cell->xpad = g_value_get_uint (value);
 394       break;
 395     case PROP_YPAD:
 396       cell->ypad = g_value_get_uint (value);
 397       break;
 398     case PROP_WIDTH:
 399       cell->width = g_value_get_int (value);
 400       break;
 401     case PROP_HEIGHT:
 402       cell->height = g_value_get_int (value);
 403       break;
 404     case PROP_IS_EXPANDER:
 405       cell->is_expander = g_value_get_boolean (value);
 406       break;
 407     case PROP_IS_EXPANDED:
 408       cell->is_expanded = g_value_get_boolean (value);
 409       break;
 410     case PROP_CELL_BACKGROUND:
 411       {
 412         GdkColor color;
 413
 414         if (!g_value_get_string (value))
 415           set_cell_bg_color (cell, NULL);
 416         else if (gdk_color_parse (g_value_get_string (value), &color))
 417           set_cell_bg_color (cell, &color);
 418         else
 419           g_warning ("Don't know color `%s'", g_value_get_string (value));
 420
 421         g_object_notify (object, "cell-background-gdk");
 422       }
 423       break;
 424     case PROP_CELL_BACKGROUND_GDK:
 425       set_cell_bg_color (cell, g_value_get_boxed (value));
 426       break;
 427     case PROP_CELL_BACKGROUND_SET:
 428       cell->cell_background_set = g_value_get_boolean (value);
 429       break;
 430     default:
 431       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 432       break;
 433     }
 434 }
 435
 436 static void
 437 set_cell_bg_color (GtkCellRenderer *cell,
 438                    GdkColor        *color)
 439 {
 440   GtkCellRendererPrivate *priv = GTK_CELL_RENDERER_GET_PRIVATE (cell);
 441
 442   if (color)
 443     {
 444       if (!cell->cell_background_set)
 445         {
 446           cell->cell_background_set = TRUE;
 447           g_object_notify (G_OBJECT (cell), "cell-background-set");
 448         }
 449
 450       priv->cell_background.red = color->red;
 451       priv->cell_background.green = color->green;
 452       priv->cell_background.blue = color->blue;
 453     }
 454   else
 455     {
 456       if (cell->cell_background_set)
 457         {
 458           cell->cell_background_set = FALSE;
 459           g_object_notify (G_OBJECT (cell), "cell-background-set");
 460         }
 461     }
 462 }
 463
 464 /**
 465  * gtk_cell_renderer_get_size:
 466  * @cell: a #GtkCellRenderer
 467  * @widget: the widget the renderer is rendering to
 468  * @cell_area: The area a cell will be allocated, or %NULL
 469  * @x_offset: location to return x offset of cell relative to @cell_area, or %NULL
 470  * @y_offset: location to return y offset of cell relative to @cell_area, or %NULL
 471  * @width: location to return width needed to render a cell, or %NULL
 472  * @height: location to return height needed to render a cell, or %NULL
 473  *
 474  * Obtains the width and height needed to render the cell. Used by view widgets
 475  * to determine the appropriate size for the cell_area passed to
 476  * gtk_cell_renderer_render().  If @cell_area is not %NULL, fills in the x and y
 477  * offsets (if set) of the cell relative to this location.  Please note that the
 478  * values set in @width and @height, as well as those in @x_offset and @y_offset
 479  * are inclusive of the xpad and ypad properties.
 480  **/
 481 void
 482 gtk_cell_renderer_get_size (GtkCellRenderer *cell,
 483                             GtkWidget       *widget,
 484                             GdkRectangle    *cell_area,
 485                             gint            *x_offset,
 486                             gint            *y_offset,
 487                             gint            *width,
 488                             gint            *height)
 489 {
 490   gint *real_width = width;
 491   gint *real_height = height;
 492
 493   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 494   g_return_if_fail (GTK_CELL_RENDERER_GET_CLASS (cell)->get_size != NULL);
 495
 496   if (width && cell->width != -1)
 497     {
 498       real_width = NULL;
 499       *width = cell->width;
 500     }
 501   if (height && cell->height != -1)
 502     {
 503       real_height = NULL;
 504       *height = cell->height;
 505     }
 506
 507   GTK_CELL_RENDERER_GET_CLASS (cell)->get_size (cell,
 508                                                 widget,
 509                                                 cell_area,
 510                                                 x_offset,
 511                                                 y_offset,
 512                                                 real_width,
 513                                                 real_height);
 514 }
 515
 516 /**
 517  * gtk_cell_renderer_render:
 518  * @cell: a #GtkCellRenderer
 519  * @window: a #GdkDrawable to draw to
 520  * @widget: the widget owning @window
 521  * @background_area: entire cell area (including tree expanders and maybe padding on the sides)
 522  * @cell_area: area normally rendered by a cell renderer
 523  * @expose_area: area that actually needs updating
 524  * @flags: flags that affect rendering
 525  *
 526  * Invokes the virtual render function of the #GtkCellRenderer. The three
 527  * passed-in rectangles are areas of @window. Most renderers will draw within
 528  * @cell_area; the xalign, yalign, xpad, and ypad fields of the #GtkCellRenderer
 529  * should be honored with respect to @cell_area. @background_area includes the
 530  * blank space around the cell, and also the area containing the tree expander;
 531  * so the @background_area rectangles for all cells tile to cover the entire
 532  * @window.  @expose_area is a clip rectangle.
 533  *
 534  **/
 535 void
 536 gtk_cell_renderer_render (GtkCellRenderer     *cell,
 537                           GdkWindow           *window,
 538                           GtkWidget           *widget,
 539                           GdkRectangle        *background_area,
 540                           GdkRectangle        *cell_area,
 541                           GdkRectangle        *expose_area,
 542                           GtkCellRendererState flags)
 543 {
 544   gboolean selected = FALSE;
 545   GtkCellRendererPrivate *priv = GTK_CELL_RENDERER_GET_PRIVATE (cell);
 546
 547   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 548   g_return_if_fail (GTK_CELL_RENDERER_GET_CLASS (cell)->render != NULL);
 549
 550   selected = (flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED;
 551
 552   if (cell->cell_background_set && !selected)
 553     {
 554       cairo_t *cr = gdk_cairo_create (window);
 555
 556       gdk_cairo_rectangle (cr, background_area);
 557       gdk_cairo_set_source_color (cr, &priv->cell_background);
 558       cairo_fill (cr);
 559
 560       cairo_destroy (cr);
 561     }
 562
 563   GTK_CELL_RENDERER_GET_CLASS (cell)->render (cell,
 564                                               window,
 565                                               widget,
 566                                               background_area,
 567                                               cell_area,
 568                                               expose_area,
 569                                               flags);
 570 }
 571
 572 /**
 573  * gtk_cell_renderer_activate:
 574  * @cell: a #GtkCellRenderer
 575  * @event: a #GdkEvent
 576  * @widget: widget that received the event
 577  * @path: widget-dependent string representation of the event location; e.g. for #GtkTreeView, a string representation of #GtkTreePath
 578  * @background_area: background area as passed to @gtk_cell_renderer_render
 579  * @cell_area: cell area as passed to @gtk_cell_renderer_render
 580  * @flags: render flags
 581  *
 582  * Passes an activate event to the cell renderer for possible processing.  Some
 583  * cell renderers may use events; for example, #GtkCellRendererToggle toggles
 584  * when it gets a mouse click.
 585  *
 586  * Return value: %TRUE if the event was consumed/handled
 587  **/
 588 gboolean
 589 gtk_cell_renderer_activate (GtkCellRenderer      *cell,
 590                             GdkEvent             *event,
 591                             GtkWidget            *widget,
 592                             const gchar          *path,
 593                             GdkRectangle         *background_area,
 594                             GdkRectangle         *cell_area,
 595                             GtkCellRendererState  flags)
 596 {
 597   g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
 598
 599   if (cell->mode != GTK_CELL_RENDERER_MODE_ACTIVATABLE)
 600     return FALSE;
 601
 602   if (GTK_CELL_RENDERER_GET_CLASS (cell)->activate == NULL)
 603     return FALSE;
 604
 605   return GTK_CELL_RENDERER_GET_CLASS (cell)->activate (cell,
 606                                                        event,
 607                                                        widget,
 608                                                        path,
 609                                                        background_area,
 610                                                        cell_area,
 611                                                        flags);
 612 }
 613
 614 /**
 615  * gtk_cell_renderer_start_editing:
 616  * @cell: a #GtkCellRenderer
 617  * @event: a #GdkEvent
 618  * @widget: widget that received the event
 619  * @path: widget-dependent string representation of the event location; e.g. for #GtkTreeView, a string representation of #GtkTreePath
 620  * @background_area: background area as passed to @gtk_cell_renderer_render
 621  * @cell_area: cell area as passed to @gtk_cell_renderer_render
 622  * @flags: render flags
 623  *
 624  * Passes an activate event to the cell renderer for possible processing.
 625  *
 626  * Return value: A new #GtkCellEditable, or %NULL
 627  **/
 628 GtkCellEditable *
 629 gtk_cell_renderer_start_editing (GtkCellRenderer      *cell,
 630                                  GdkEvent             *event,
 631                                  GtkWidget            *widget,
 632                                  const gchar          *path,
 633                                  GdkRectangle         *background_area,
 634                                  GdkRectangle         *cell_area,
 635                                  GtkCellRendererState  flags)
 636
 637 {
 638   GtkCellEditable *editable;
 639
 640   g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), NULL);
 641
 642   if (cell->mode != GTK_CELL_RENDERER_MODE_EDITABLE)
 643     return NULL;
 644
 645   if (GTK_CELL_RENDERER_GET_CLASS (cell)->start_editing == NULL)
 646     return NULL;
 647
 648   editable = GTK_CELL_RENDERER_GET_CLASS (cell)->start_editing (cell,
 649                                                                 event,
 650                                                                 widget,
 651                                                                 path,
 652                                                                 background_area,
 653                                                                 cell_area,
 654                                                                 flags);
 655
 656   g_signal_emit (cell,
 657                  cell_renderer_signals[EDITING_STARTED], 0,
 658                  editable, path);
 659
 660   cell->editing = TRUE;
 661
 662   return editable;
 663 }
 664
 665 /**
 666  * gtk_cell_renderer_set_fixed_size:
 667  * @cell: A #GtkCellRenderer
 668  * @width: the width of the cell renderer, or -1
 669  * @height: the height of the cell renderer, or -1
 670  *
 671  * Sets the renderer size to be explicit, independent of the properties set.
 672  **/
 673 void
 674 gtk_cell_renderer_set_fixed_size (GtkCellRenderer *cell,
 675                                   gint             width,
 676                                   gint             height)
 677 {
 678   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 679   g_return_if_fail (width >= -1 && height >= -1);
 680
 681   if ((width != cell->width) || (height != cell->height))
 682     {
 683       g_object_freeze_notify (G_OBJECT (cell));
 684
 685       if (width != cell->width)
 686         {
 687           cell->width = width;
 688           g_object_notify (G_OBJECT (cell), "width");
 689         }
 690
 691       if (height != cell->height)
 692         {
 693           cell->height = height;
 694           g_object_notify (G_OBJECT (cell), "height");
 695         }
 696
 697       g_object_thaw_notify (G_OBJECT (cell));
 698     }
 699 }
 700
 701 /**
 702  * gtk_cell_renderer_get_fixed_size:
 703  * @cell: A #GtkCellRenderer
 704  * @width: location to fill in with the fixed width of the widget, or %NULL
 705  * @height: location to fill in with the fixed height of the widget, or %NULL
 706  *
 707  * Fills in @width and @height with the appropriate size of @cell.
 708  **/
 709 void
 710 gtk_cell_renderer_get_fixed_size (GtkCellRenderer *cell,
 711                                   gint            *width,
 712                                   gint            *height)
 713 {
 714   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 715
 716   if (width)
 717     (* width) = cell->width;
 718   if (height)
 719     (* height) = cell->height;
 720 }
 721
 722 /**
 723  * gtk_cell_renderer_editing_canceled:
 724  * @cell: A #GtkCellRenderer
 725  *
 726  * Causes the cell renderer to emit the "editing-canceled" signal.  This
 727  * function is for use only by implementations of cell renderers that need to
 728  * notify the client program that an editing process was canceled and the
 729  * changes were not committed.
 730  *
 731  * Since: 2.4
 732  * Deprecated: 2.6: Use gtk_cell_renderer_stop_editing() instead
 733  **/
 734 void
 735 gtk_cell_renderer_editing_canceled (GtkCellRenderer *cell)
 736 {
 737   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 738
 739   gtk_cell_renderer_stop_editing (cell, TRUE);
 740 }
 741
 742 /**
 743  * gtk_cell_renderer_stop_editing:
 744  * @cell: A #GtkCellRenderer
 745  * @canceled: %TRUE if the editing has been canceled
 746  *
 747  * Informs the cell renderer that the editing is stopped.
 748  * If @canceled is %TRUE, the cell renderer will emit the "editing-canceled"
 749  * signal. This function should be called by cell renderer implementations
 750  * in response to the "editing-done" signal of #GtkCellEditable.
 751  *
 752  * Since: 2.6
 753  **/
 754 void
 755 gtk_cell_renderer_stop_editing (GtkCellRenderer *cell,
 756                                 gboolean         canceled)
 757 {
 758   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 759
 760   if (cell->editing)
 761     {
 762       cell->editing = FALSE;
 763       if (canceled)
 764         g_signal_emit (cell, cell_renderer_signals[EDITING_CANCELED], 0);
 765     }
 766 }
 767
 768 #define __GTK_CELL_RENDERER_C__
 769 #include "gtkaliasdef.c"