ChildProxy

Object Hierarchy:

Description:

[ CCode ( type_cname = "GstChildProxyInterface" , type_id = "gst_child_proxy_get_type ()" ) ]
public interface ChildProxy : Object

This interface abstracts handling of property sets for elements with children.

Imagine elements such as mixers or polyphonic generators. They all have multiple Pad or some kind of voice objects. Another use case are container elements like Bin. The element implementing the interface acts as a parent for those child objects.

By implementing this interface the child properties can be accessed from the parent element by using @get and @set.

Property names are written as `child-name::property-name`. The whole naming scheme is recursive. Thus `child1::child2::property` is valid too, if `child1` and `child2` implement the ChildProxy interface.

All known implementing classes:

Pipeline

Namespace: Gst

Package: gstreamer-1.0

Content:

Methods:

public void @get (...)
Gets properties of the parent object and its children.
public void @set (...)
Sets properties of the parent object and its children.
public abstract Object? get_child_by_index (uint index)
Fetches a child by its number.
public abstract Object? get_child_by_name (string name)
Looks up a child element by the given name.
public Object? get_child_by_name_recurse (string name)
Looks up a child element by the given full-path name.
public abstract uint get_children_count ()
Gets the number of child objects this parent contains.
public void get_property (string name, ref Value value)
Gets a single property using the GstChildProxy mechanism.
public void get_valist (string first_property_name, va_list var_args)
Gets properties of the parent object and its children.
public bool lookup (string name, out Object target, out unowned ParamSpec pspec)
Looks up which object and ParamSpec would be effected by the given name.
public void set_property (string name, Value value)
Sets a single property using the GstChildProxy mechanism.
public void set_valist (string first_property_name, va_list var_args)
Sets properties of the parent object and its children.

Signals:

public virtual signal void child_added (Object child, string name)
Will be emitted after the object was added to the child_proxy.
public virtual signal void child_removed (Object child, string name)
Will be emitted after the object was removed from the child_proxy.

Inherited Members:

All known members inherited from class GLib.Object