02b69e4d76
GCC has some optimization for the inclusion guard, but they only work if the check is the outermost one. We're fairly inconsistent because of historical reasons, so we should ensure that we follow the same pattern in every public header.
123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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* Jorn Baayen <jorn@openedhand.com>
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* Emmanuele Bassi <ebassi@openedhand.com>
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* Tomas Frydrych <tf@openedhand.com>
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* Øyvind Kolås <ok@openedhand.com>
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*
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* Copyright (C) 2008 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __CLUTTER_CHILD_META_H__
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#define __CLUTTER_CHILD_META_H__
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#include <glib-object.h>
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#include <clutter/clutter-types.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_CHILD_META (clutter_child_meta_get_type ())
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#define CLUTTER_CHILD_META(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_CHILD_META, ClutterChildMeta))
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#define CLUTTER_CHILD_META_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_CHILD_META, ClutterChildMetaClass))
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#define CLUTTER_IS_CHILD_META(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_CHILD_META))
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#define CLUTTER_IS_CHILD_META_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_CHILD_META))
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#define CLUTTER_CHILD_META_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_CHILD_META, ClutterChildMetaClass))
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typedef struct _ClutterChildMetaClass ClutterChildMetaClass;
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/**
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* ClutterChildMeta:
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* @container: the container handling this data
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* @actor: the actor wrapped by this data
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*
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* Base interface for container specific state for child actors. A child
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* data is meant to be used when you need to keep track of information
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* about each individual child added to a container.
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*
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* In order to use it you should create your own subclass of
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* #ClutterChildMeta and set the #ClutterContainerIface child_meta_type
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* interface member to your subclass type, like:
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*
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* |[
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* static void
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* my_container_iface_init (ClutterContainerIface *iface)
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* {
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* // set the rest of the #ClutterContainer vtable
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*
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* container_iface->child_meta_type = MY_TYPE_CHILD_META;
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* }
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* ]|
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*
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* This will automatically create a #ClutterChildMeta of type
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* `MY_TYPE_CHILD_META` for every actor that is added to the container.
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*
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* The child data for an actor can be retrieved using the
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* clutter_container_get_child_meta() function.
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*
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* The properties of the data and your subclass can be manipulated with
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* clutter_container_child_set() and clutter_container_child_get() which
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* act like g_object_set() and g_object_get().
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*
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* You can provide hooks for your own storage as well as control the
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* instantiation by overriding the #ClutterContainerIface virtual functions
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* #ClutterContainerIface.create_child_meta(), #ClutterContainerIface.destroy_child_meta(),
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* and #ClutterContainerIface.get_child_meta().
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*
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* Since: 0.8
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*/
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struct _ClutterChildMeta
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{
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/*< private >*/
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GObject parent_instance;
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/*< public >*/
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ClutterContainer *container;
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ClutterActor *actor;
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};
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/**
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* ClutterChildMetaClass:
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*
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* The #ClutterChildMetaClass contains only private data
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*
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* Since: 0.8
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*/
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struct _ClutterChildMetaClass
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{
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/*< private >*/
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GObjectClass parent_class;
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};
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CLUTTER_AVAILABLE_IN_ALL
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GType clutter_child_meta_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_ALL
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ClutterContainer * clutter_child_meta_get_container (ClutterChildMeta *data);
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CLUTTER_AVAILABLE_IN_ALL
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ClutterActor * clutter_child_meta_get_actor (ClutterChildMeta *data);
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G_END_DECLS
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#endif /* __CLUTTER_CHILD_META_H__ */
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