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Description
EExtension objects can be tacked on to any GObject instance that implements the EExtensible interface. A GObject type can be made extensible in two steps:
Add the EExtensible interface when registering the GType. There are no methods to implement.
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#include <libedataserver/libedataserver.h> G_DEFINE_TYPE_WITH_CODE ( ECustomWidget, e_custom_widget, GTK_TYPE_WIDGET, G_IMPLEMENT_INTERFACE (E_TYPE_EXTENSIBLE, NULL)) |
Load extensions for the class at some point during GObject initialization. Generally this should be done toward the end of the initialization code, so extensions get a fully initialized object to work with.
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static void e_custom_widget_constructed (ECustomWidget *widget) { Construction code goes here, same as call to parent's 'constructed'... e_extensible_load_extensions (E_EXTENSIBLE (widget)); } |
Functions
e_extensible_load_extensions ()
void
e_extensible_load_extensions (EExtensible *extensible
);
Creates an instance of all instantiable subtypes of EExtension which
target the class of extensible
. The lifetimes of these newly created
EExtension objects are bound to extensible
such that they are finalized
when extensible
is finalized.
Since: 3.4
e_extensible_list_extensions ()
GList * e_extensible_list_extensions (EExtensible *extensible
,GType extension_type
);
Returns a list of EExtension objects bound to extensible
whose
types are ancestors of extension_type
. For a complete list of
extension objects bound to extensible
, pass E_TYPE_EXTENSION
.
The list itself should be freed with g_list_free()
. The extension
objects are owned by extensible
and should not be unreferenced.
Returns
a list of extension objects derived from extension_type
.
[element-type EExtension][transfer container]
Since: 3.4