gtk2/gtk/a11y/gtkimagecellaccessible.c

/* GAIL - The GNOME Accessibility Enabling Library
 * Copyright 2001 Sun Microsystems Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <gtk/gtk.h>
#include "gtkimagecellaccessible.h"

static gchar *property_list[] = {
  "pixbuf",
  NULL
};

static void atk_image_interface_init (AtkImageIface *iface);

G_DEFINE_TYPE_WITH_CODE (GtkImageCellAccessible, _gtk_image_cell_accessible, GTK_TYPE_RENDERER_CELL_ACCESSIBLE,
                         G_IMPLEMENT_INTERFACE (ATK_TYPE_IMAGE, atk_image_interface_init))

static void
gtk_image_cell_accessible_finalize (GObject *object)
{
  GtkImageCellAccessible *image_cell = GTK_IMAGE_CELL_ACCESSIBLE (object);

  g_free (image_cell->image_description);
  G_OBJECT_CLASS (_gtk_image_cell_accessible_parent_class)->finalize (object);
}

static gboolean
gtk_image_cell_accessible_update_cache (GtkRendererCellAccessible *cell,
                                        gboolean                   emit_change_signal)
{
  return FALSE;
}

static void
_gtk_image_cell_accessible_class_init (GtkImageCellAccessibleClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GtkRendererCellAccessibleClass *renderer_cell_class = GTK_RENDERER_CELL_ACCESSIBLE_CLASS (klass);

  gobject_class->finalize = gtk_image_cell_accessible_finalize;

  renderer_cell_class->update_cache = gtk_image_cell_accessible_update_cache;
  renderer_cell_class->property_list = property_list;
}

AtkObject *
_gtk_image_cell_accessible_new (void)
{
  GObject *object;
  AtkObject *atk_object;
  GtkRendererCellAccessible *cell;

  object = g_object_new (GTK_TYPE_IMAGE_CELL_ACCESSIBLE, NULL);

  g_return_val_if_fail (object != NULL, NULL);

  atk_object = ATK_OBJECT (object);
  atk_object->role = ATK_ROLE_TABLE_CELL;

  cell = GTK_RENDERER_CELL_ACCESSIBLE (object);

  cell->renderer = gtk_cell_renderer_pixbuf_new ();
  g_object_ref_sink (cell->renderer);

  return atk_object;
}

static void
_gtk_image_cell_accessible_init (GtkImageCellAccessible *image_cell)
{
  image_cell->image_description = NULL;
}

static const gchar *
gtk_image_cell_accessible_get_image_description (AtkImage *image)
{
  GtkImageCellAccessible *image_cell = GTK_IMAGE_CELL_ACCESSIBLE (image);

  return image_cell->image_description;
}

static gboolean
gtk_image_cell_accessible_set_image_description (AtkImage    *image,
                                                 const gchar *description)
{
  GtkImageCellAccessible *image_cell = GTK_IMAGE_CELL_ACCESSIBLE (image);

  g_free (image_cell->image_description);
  image_cell->image_description = g_strdup (description);

  if (image_cell->image_description)
    return TRUE;
  else
    return FALSE;
}

static void
gtk_image_cell_accessible_get_image_position (AtkImage     *image,
                                              gint         *x,
                                              gint         *y,
                                              AtkCoordType  coord_type)
{
  atk_component_get_position (ATK_COMPONENT (image), x, y, coord_type);
}

static void
gtk_image_cell_accessible_get_image_size (AtkImage *image,
                                          gint     *width,
                                          gint     *height)
{
  GtkImageCellAccessible *cell = GTK_IMAGE_CELL_ACCESSIBLE (image);
  GtkCellRenderer *cell_renderer;
  GdkPixbuf *pixbuf = NULL;

  *width = 0;
  *height = 0;

  cell_renderer = GTK_RENDERER_CELL_ACCESSIBLE (cell)->renderer;
  g_object_get (GTK_CELL_RENDERER_PIXBUF (cell_renderer),
                "pixbuf", &pixbuf,
                NULL);

  if (pixbuf)
    {
      *width = gdk_pixbuf_get_width (pixbuf);
      *height = gdk_pixbuf_get_height (pixbuf);
      g_object_unref (pixbuf);
    }
}

static void
atk_image_interface_init (AtkImageIface  *iface)
{
  iface->get_image_description = gtk_image_cell_accessible_get_image_description;
  iface->set_image_description = gtk_image_cell_accessible_set_image_description;
  iface->get_image_position = gtk_image_cell_accessible_get_image_position;
  iface->get_image_size = gtk_image_cell_accessible_get_image_size;
}