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* Demonstrate extending the EExtension API.Matthew Barnes2010-04-071-0/+2
| | | | | | | | | | | | | | | Introduce e_extensible_list_extensions(), which provides extensible objects access to their own extensions, or a subset of them. Convert EShellBackend to an abstract EExtension subtype. EShell will load its extensions with e_extensible_load_extensions(), and then obtain a list of EShellBackend extensions as follows: shell_backends = e_extensible_list_extensions ( E_EXTENSIBLE (shell), E_TYPE_SHELL_BACKEND); Because EShellBackend is abstract, its GType is skipped while traversing the GType hierarchy to find EShell extensions.
* Introduce a simple extension system for objects.Matthew Barnes2010-04-071-0/+57
This introduces a simple means of extending Evolution objects. Any GObject subclass wishing to be extensible need only call g_type_add_interface_static (type, E_TYPE_EXTENSIBLE, NULL); when registering its GType, and then at some point during initialization call e_extensible_load_extensions() to load extensions for that subclass. Extensions are implemented by subclassing EExtension, setting the GType being extended in EExtensionClass, and making sure its own GType gets registered at startup. This usually done while loading a GTypeModule. e_extension_get_extensible() provides extensions access to the object being extended.