9423214783
This adds a priority property to all ClutterActorMetas. The ClutterMetaGroup keeps the list sorted so that higher priority metas remain at the beginning of the list. The priority is a signed integer with the default as zero. An actor meta can therefore be put before all default metas with a positive number, or after with a negative number. There are constants to set an 'internal' priority. The intention is that applications wouldn't be allowed to use these values so that we can keep special internal metas to that are before or after all application metas. The property isn't a real GObject property because for now it is completely internal and only used to implement the 'transparency' property of ClutterActor. ClutterMetaGroup doesn't currently resort the list if the property changes so if we wanted to make it public we should either make it construct-only or make the meta group listen for changes on the property and resort accordingly. The methods in ClutterActor that get the list of metas now use a new function that filters out internal metas from the meta group. Similarly for clearing the metas, the internal metas are left in.
98 lines
3.6 KiB
C
98 lines
3.6 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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* Copyright (C) 2010 Intel Corporation.
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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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* Author:
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* Emmanuele Bassi <ebassi@linux.intel.com>
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*/
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#ifndef __CLUTTER_ACTOR_META_PRIVATE_H__
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#define __CLUTTER_ACTOR_META_PRIVATE_H__
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#include <clutter/clutter-actor-meta.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_META_GROUP (_clutter_meta_group_get_type ())
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#define CLUTTER_META_GROUP(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_META_GROUP, ClutterMetaGroup))
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#define CLUTTER_IS_META_GROUP(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_META_GROUP))
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typedef struct _ClutterMetaGroup ClutterMetaGroup;
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typedef struct _ClutterMetaGroupClass ClutterMetaGroupClass;
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struct _ClutterMetaGroup
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{
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GObject parent_instance;
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ClutterActor *actor;
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GList *meta;
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};
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struct _ClutterMetaGroupClass
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{
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GObjectClass parent_class;
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};
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/* Each actor meta has a priority with zero as a default. A higher
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number means higher priority. Higher priority metas stay at the
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beginning of the list. The priority can be negative to give lower
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priority than the default. */
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#define CLUTTER_ACTOR_META_PRIORITY_DEFAULT 0
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/* Any value greater than this is considered an 'internal' priority
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and if we expose the priority property publicly then an application
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would not be able to use these values. */
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#define CLUTTER_ACTOR_META_PRIORITY_INTERNAL_HIGH (G_MAXINT / 2)
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#define CLUTTER_ACTOR_META_PRIORITY_INTERNAL_LOW (G_MININT / 2)
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GType _clutter_meta_group_get_type (void) G_GNUC_CONST;
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void _clutter_meta_group_add_meta (ClutterMetaGroup *group,
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ClutterActorMeta *meta);
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void _clutter_meta_group_remove_meta (ClutterMetaGroup *group,
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ClutterActorMeta *meta);
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G_CONST_RETURN GList *_clutter_meta_group_peek_metas (ClutterMetaGroup *group);
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void _clutter_meta_group_clear_metas (ClutterMetaGroup *group);
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ClutterActorMeta * _clutter_meta_group_get_meta (ClutterMetaGroup *group,
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const gchar *name);
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GList *
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_clutter_meta_group_get_metas_no_internal (ClutterMetaGroup *group);
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void
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_clutter_meta_group_clear_metas_no_internal (ClutterMetaGroup *group);
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/* ActorMeta */
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void _clutter_actor_meta_set_actor (ClutterActorMeta *meta,
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ClutterActor *actor);
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const gchar * _clutter_actor_meta_get_debug_name (ClutterActorMeta *meta);
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void _clutter_actor_meta_set_priority (ClutterActorMeta *meta,
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gint priority);
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int _clutter_actor_meta_get_priority (ClutterActorMeta *meta);
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gboolean _clutter_actor_meta_is_internal (ClutterActorMeta *meta);
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G_END_DECLS
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#endif /* __CLUTTER_ACTOR_META_PRIVATE_H__ */
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