6fff1bcdc6
The Animatable interface implementation will always have the computed value applied, whilst the non-Animatable objects go through the interval validation first to avoid incurring in assertions and warnings. The Animatable::animate_property() should also be able to validate the property it's supposed to interpolate, and eventually discard it. This requires adding a return value to the virtual function (and its wrapper function). The Animation code will then apply the computed value only if the animate_property() returns TRUE -- unifying the code path with the non-Animatable objects.
81 lines
3.1 KiB
C
81 lines
3.1 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) 2009 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_ANIMATABLE_H__
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#define __CLUTTER_ANIMATABLE_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 <clutter/clutter-animation.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_ANIMATABLE (clutter_animatable_get_type ())
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#define CLUTTER_ANIMATABLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_ANIMATABLE, ClutterAnimatable))
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#define CLUTTER_IS_ANIMATABLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_ANIMATABLE))
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#define CLUTTER_ANIMATABLE_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), CLUTTER_TYPE_ANIMATABLE, ClutterAnimatableIface))
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typedef struct _ClutterAnimatable ClutterAnimatable; /* dummy typedef */
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typedef struct _ClutterAnimatableIface ClutterAnimatableIface;
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/**
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* ClutterAnimatableIface:
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* @animate_property: virtual function for animating a property
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*
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* Base interface for #GObject<!-- -->s that can be animated by a
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* a #ClutterAnimation.
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*
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* Since: 1.0
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*/
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struct _ClutterAnimatableIface
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{
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/*< private >*/
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GTypeInterface parent_iface;
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/*< public >*/
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gboolean (* animate_property) (ClutterAnimatable *animatable,
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ClutterAnimation *animation,
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const gchar *property_name,
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const GValue *initial_value,
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const GValue *final_value,
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gdouble progress,
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GValue *value);
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};
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GType clutter_animatable_get_type (void) G_GNUC_CONST;
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gboolean clutter_animatable_animate_property (ClutterAnimatable *animatable,
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ClutterAnimation *animation,
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const gchar *property_name,
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const GValue *initial_value,
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const GValue *final_value,
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gdouble progress,
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GValue *value);
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G_END_DECLS
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#endif /* __CLUTTER_ANIMATABLE_H__ */
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