* 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.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
+#include "config.h"
#include <string.h>
-#include <gtk/gtkwidget.h>
-#include <gtk/gtksignal.h>
-#include <gtk/gtkaccessible.h>
-static void gtk_accessible_class_init (GtkAccessibleClass *klass);
+#include "gtkwidget.h"
+#include "gtkintl.h"
+#include "gtkaccessible.h"
+
+/**
+ * SECTION:gtkaccessible
+ * @Short_description: Accessibility support for widgets
+ * @Title: GtkAccessible
+ *
+ * The #GtkAccessible class is the base class for accessible
+ * implementations for #GtkWidget subclasses. It is a thin
+ * wrapper around #AtkObject, which adds facilities for associating
+ * a widget with its accessible object.
+ *
+ * An accessible implementation for a third-party widget should
+ * derive from #GtkAccessible and implement the suitable interfaces
+ * from ATK, such as #AtkText or #AtkSelection. To establish
+ * the connection between the widget class and its corresponding
+ * acccessible implementation, override the get_accessible vfunc
+ * in #GtkWidgetClass.
+ */
+
+struct _GtkAccessiblePrivate
+{
+ GtkWidget *widget;
+};
+
+enum {
+ PROP_0,
+ PROP_WIDGET
+};
static void gtk_accessible_real_connect_widget_destroyed (GtkAccessible *accessible);
-GtkType
-gtk_accessible_get_type (void)
+G_DEFINE_TYPE (GtkAccessible, gtk_accessible, ATK_TYPE_OBJECT)
+
+static void
+gtk_accessible_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
{
- static GtkType accessible_type = 0;
+ GtkAccessible *accessible = GTK_ACCESSIBLE (object);
- if (!accessible_type)
+ switch (prop_id)
{
- static const GTypeInfo accessible_info =
- {
- sizeof (GtkAccessibleClass),
- NULL, /* base_init */
- NULL, /* base_finalize */
- (GClassInitFunc) gtk_accessible_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (GtkAccessible),
- 16, /* n_preallocs */
- (GInstanceInitFunc) NULL,
- };
-
- accessible_type = g_type_register_static (ATK_TYPE_OBJECT, "GtkAccessible", &accessible_info, 0);
+ case PROP_WIDGET:
+ gtk_accessible_set_widget (accessible, g_value_get_object (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
}
+}
+
+static void
+gtk_accessible_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GtkAccessible *accessible = GTK_ACCESSIBLE (object);
+ GtkAccessiblePrivate *priv = accessible->priv;
+
+ switch (prop_id)
+ {
+ case PROP_WIDGET:
+ g_value_set_object (value, priv->widget);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gtk_accessible_init (GtkAccessible *accessible)
+{
+ accessible->priv = G_TYPE_INSTANCE_GET_PRIVATE (accessible,
+ GTK_TYPE_ACCESSIBLE,
+ GtkAccessiblePrivate);
+}
+
+static AtkStateSet *
+gtk_accessible_ref_state_set (AtkObject *object)
+{
+ GtkAccessible *accessible = GTK_ACCESSIBLE (object);
+ AtkStateSet *state_set;
- return accessible_type;
+ state_set = ATK_OBJECT_CLASS (gtk_accessible_parent_class)->ref_state_set (object);
+
+ if (accessible->priv->widget == NULL)
+ atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
+
+ return state_set;
+}
+
+static void
+gtk_accessible_real_widget_set (GtkAccessible *accessible)
+{
+ atk_object_notify_state_change (ATK_OBJECT (accessible), ATK_STATE_DEFUNCT, FALSE);
+}
+
+static void
+gtk_accessible_real_widget_unset (GtkAccessible *accessible)
+{
+ atk_object_notify_state_change (ATK_OBJECT (accessible), ATK_STATE_DEFUNCT, TRUE);
+}
+
+static void
+gtk_accessible_dispose (GObject *object)
+{
+ GtkAccessible *accessible = GTK_ACCESSIBLE (object);
+
+ gtk_accessible_set_widget (accessible, NULL);
+
+ G_OBJECT_CLASS (gtk_accessible_parent_class)->dispose (object);
}
static void
gtk_accessible_class_init (GtkAccessibleClass *klass)
{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ AtkObjectClass *atkobject_class = ATK_OBJECT_CLASS (klass);
+
klass->connect_widget_destroyed = gtk_accessible_real_connect_widget_destroyed;
+ klass->widget_set = gtk_accessible_real_widget_set;
+ klass->widget_unset = gtk_accessible_real_widget_unset;
+
+ atkobject_class->ref_state_set = gtk_accessible_ref_state_set;
+ gobject_class->get_property = gtk_accessible_get_property;
+ gobject_class->set_property = gtk_accessible_set_property;
+ gobject_class->dispose = gtk_accessible_dispose;
+ g_object_class_install_property (gobject_class,
+ PROP_WIDGET,
+ g_param_spec_object ("widget",
+ P_("Widget"),
+ P_("The widget referenced by this accessible."),
+ GTK_TYPE_WIDGET,
+ G_PARAM_READWRITE));
+
+ g_type_class_add_private (klass, sizeof (GtkAccessiblePrivate));
}
/**
- * gtk_accessible_connect_widget_destroyed
+ * gtk_accessible_set_widget:
* @accessible: a #GtkAccessible
+ * @widget: (allow-none): a #GtkWidget or %NULL to unset
+ *
+ * Sets the #GtkWidget corresponding to the #GtkAccessible.
*
- * This function specifies the callback function to be called when the widget
- * corresponding to a GtkAccessible is destroyed.
+ * <note><para>@accessible will not hold a reference to @widget.
+ * It is the caller's responsibility to ensure that when @widget
+ * is destroyed, the widget is unset by calling this function
+ * again with @widget set to %NULL.</para></note>
+ * Since: 2.22
+ */
+void
+gtk_accessible_set_widget (GtkAccessible *accessible,
+ GtkWidget *widget)
+{
+ GtkAccessiblePrivate *priv;
+ GtkAccessibleClass *klass;
+
+ g_return_if_fail (GTK_IS_ACCESSIBLE (accessible));
+
+ priv = accessible->priv;
+ klass = GTK_ACCESSIBLE_GET_CLASS (accessible);
+
+ if (priv->widget == widget)
+ return;
+
+ if (priv->widget)
+ klass->widget_unset (accessible);
+
+ priv->widget = widget;
+
+ if (widget)
+ klass->widget_set (accessible);
+
+ g_object_notify (G_OBJECT (accessible), "widget");
+}
+
+/**
+ * gtk_accessible_get_widget:
+ * @accessible: a #GtkAccessible
+ *
+ * Gets the #GtkWidget corresponding to the #GtkAccessible.
+ * The returned widget does not have a reference added, so
+ * you do not need to unref it.
+ *
+ * Returns: (transfer none): pointer to the #GtkWidget
+ * corresponding to the #GtkAccessible, or %NULL.
+ *
+ * Since: 2.22
+ */
+GtkWidget*
+gtk_accessible_get_widget (GtkAccessible *accessible)
+{
+ g_return_val_if_fail (GTK_IS_ACCESSIBLE (accessible), NULL);
+
+ return accessible->priv->widget;
+}
+
+/**
+ * gtk_accessible_connect_widget_destroyed:
+ * @accessible: a #GtkAccessible
+ *
+ * This function specifies the callback function to be called
+ * when the widget corresponding to a GtkAccessible is destroyed.
+ *
+ * Deprecated: 3.4: Use gtk_accessible_set_widget() and its vfuncs.
*/
void
gtk_accessible_connect_widget_destroyed (GtkAccessible *accessible)
{
GtkAccessibleClass *class;
- g_return_if_fail (accessible != NULL);
g_return_if_fail (GTK_IS_ACCESSIBLE (accessible));
class = GTK_ACCESSIBLE_GET_CLASS (accessible);
class->connect_widget_destroyed (accessible);
}
+static void
+gtk_accessible_widget_destroyed (GtkWidget *widget,
+ GtkAccessible *accessible)
+{
+ gtk_accessible_set_widget (accessible, NULL);
+}
+
static void
gtk_accessible_real_connect_widget_destroyed (GtkAccessible *accessible)
{
- if (accessible->widget)
- {
- gtk_signal_connect (GTK_OBJECT (accessible->widget),
- "destroy",
- GTK_SIGNAL_FUNC (gtk_widget_destroyed),
- &accessible->widget);
- }
+ GtkAccessiblePrivate *priv = accessible->priv;
+
+ if (priv->widget)
+ g_signal_connect (priv->widget, "destroy",
+ G_CALLBACK (gtk_accessible_widget_destroyed), accessible);
}
projects / ~andy / gtk / blobdiff