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childproxy: make get_child_by_name virtual

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Allows implementations to use custom name->object mappings.
This commit is contained in:
Stefan Sauer 2012-03-30 22:01:55 +02:00
parent bd625b8152
commit ef48cff3d0
2 changed files with 40 additions and 21 deletions
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57
gst/gstchildproxy.c
View file

@ -39,9 +39,7 @@
* "child1" and "child2" implement the #GstChildProxy interface.
*/
/* FIXME-0.11:
* it would be nice to make gst_child_proxy_get_child_by_name virtual too and
* use GObject instead of GstObject. We could eventually provide the current
* implementation as a default if children are GstObjects.
* it would be nice to use GObject instead of GstObject.
* This change would allow to propose the interface for inclusion with
* glib/gobject. IMHO this is useful for GtkContainer and compound widgets too.
*/
@ -61,22 +59,9 @@ enum
static guint signals[LAST_SIGNAL] = { 0 };
/**
* gst_child_proxy_get_child_by_name:
* @parent: the parent object to get the child from
* @name: the childs name
*
* Looks up a child element by the given name.
*
* Implementors can use #GstObject together with gst_object_get_name()
*
* Returns: (transfer full): the child object or %NULL if not found. Unref
* after usage.
*
* MT safe.
*/
GstObject *
gst_child_proxy_get_child_by_name (GstChildProxy * parent, const gchar * name)
static GstObject *
gst_child_proxy_default_get_child_by_name (GstChildProxy * parent,
const gchar * name)
{
guint count, i;
GstObject *object, *result;
@ -113,6 +98,30 @@ gst_child_proxy_get_child_by_name (GstChildProxy * parent, const gchar * name)
return result;
}
/**
* gst_child_proxy_get_child_by_name:
* @parent: the parent object to get the child from
* @name: the childs name
*
* Looks up a child element by the given name.
*
* Implementors can use #GstObject together with gst_object_get_name()
*
* Returns: (transfer full): the child object or %NULL if not found. Unref
* after usage.
*
* MT safe.
*/
GstObject *
gst_child_proxy_get_child_by_name (GstChildProxy * parent, const gchar * name)
{
g_return_val_if_fail (GST_IS_CHILD_PROXY (parent), 0);
return (GST_CHILD_PROXY_GET_INTERFACE (parent)->get_child_by_name (parent,
name));
}
/**
* gst_child_proxy_get_child_by_index:
* @parent: the parent object to get the child from
@ -467,6 +476,14 @@ gst_child_proxy_child_removed (GstObject * object, GstObject * child)
/* gobject methods */
static void
gst_child_proxy_class_init (gpointer g_class, gpointer class_data)
{
GstChildProxyInterface *iface = (GstChildProxyInterface *) g_class;
iface->get_child_by_name = gst_child_proxy_default_get_child_by_name;
}
static void
gst_child_proxy_base_init (gpointer g_class)
{
@ -515,7 +532,7 @@ gst_child_proxy_get_type (void)
sizeof (GstChildProxyInterface),
gst_child_proxy_base_init, /* base_init */
NULL, /* base_finalize */
NULL, /* class_init */
gst_child_proxy_class_init, /* class_init */
NULL, /* class_finalize */
NULL, /* class_data */
0,

4
gst/gstchildproxy.h
View file

@ -44,7 +44,8 @@ typedef struct _GstChildProxyInterface GstChildProxyInterface;
/**
* GstChildProxyInterface:
* @parent: parent interface type.
* @get_child_by_index: virtual method to fetch the child
* @get_child_by_name: virtual method to fetch the child by name
* @get_child_by_index: virtual method to fetch the child by index
* @get_children_count: virtual method to get the children count
*
* #GstChildProxy interface.
@ -54,6 +55,7 @@ struct _GstChildProxyInterface
GTypeInterface parent;
/* methods */
GstObject * (*get_child_by_name) (GstChildProxy * parent, const gchar * name);
GstObject * (*get_child_by_index) (GstChildProxy * parent, guint index);
guint (*get_children_count) (GstChildProxy * parent);
/*< private >*/