312 lines
8.8 KiB
C
312 lines
8.8 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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*
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* Copyright (C) 2006 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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/**
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* SECTION:clutter-behaviour-opacity
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* @Title: ClutterBehaviourOpacity
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* @short_description: A behaviour controlling opacity
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* @Deprecated: 1.6: Use clutter_actor_animate() instead.
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*
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* #ClutterBehaviourOpacity controls the opacity of a set of actors.
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*
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* Since: 0.2
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*
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* Deprecated: 1.6: Use the #ClutterActor:opacity property and
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* clutter_actor_animate(), or #ClutterAnimator, or #ClutterState
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* instead.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#define CLUTTER_DISABLE_DEPRECATION_WARNINGS
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#include "clutter-alpha.h"
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#include "clutter-behaviour.h"
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#include "clutter-behaviour-opacity.h"
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#include "clutter-private.h"
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#include "clutter-debug.h"
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struct _ClutterBehaviourOpacityPrivate
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{
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guint8 opacity_start;
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guint8 opacity_end;
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};
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enum
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{
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PROP_0,
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PROP_OPACITY_START,
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PROP_OPACITY_END,
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PROP_LAST
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};
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static GParamSpec *obj_props[PROP_LAST];
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G_DEFINE_TYPE_WITH_PRIVATE (ClutterBehaviourOpacity,
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clutter_behaviour_opacity,
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CLUTTER_TYPE_BEHAVIOUR)
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static void
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alpha_notify_foreach (ClutterBehaviour *behaviour,
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ClutterActor *actor,
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gpointer data)
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{
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clutter_actor_set_opacity (actor, GPOINTER_TO_UINT(data));
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}
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static void
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clutter_behaviour_alpha_notify (ClutterBehaviour *behave,
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gdouble alpha_value)
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{
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ClutterBehaviourOpacityPrivate *priv;
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guint8 opacity;
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priv = CLUTTER_BEHAVIOUR_OPACITY (behave)->priv;
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opacity = alpha_value
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* (priv->opacity_end - priv->opacity_start)
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+ priv->opacity_start;
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CLUTTER_NOTE (ANIMATION, "alpha: %.4f, opacity: %u",
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alpha_value,
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opacity);
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clutter_behaviour_actors_foreach (behave,
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alpha_notify_foreach,
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GUINT_TO_POINTER ((guint) opacity));
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}
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static void
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clutter_behaviour_opacity_set_property (GObject *gobject,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
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switch (prop_id)
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{
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case PROP_OPACITY_START:
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clutter_behaviour_opacity_set_bounds (self,
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g_value_get_uint (value),
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self->priv->opacity_end);
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break;
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case PROP_OPACITY_END:
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clutter_behaviour_opacity_set_bounds (self,
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self->priv->opacity_start,
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g_value_get_uint (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_opacity_get_property (GObject *gobject,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
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switch (prop_id)
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{
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case PROP_OPACITY_START:
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g_value_set_uint (value, self->priv->opacity_start);
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break;
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case PROP_OPACITY_END:
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g_value_set_uint (value, self->priv->opacity_end);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_opacity_class_init (ClutterBehaviourOpacityClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterBehaviourClass *behave_class = CLUTTER_BEHAVIOUR_CLASS (klass);
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GParamSpec *pspec;
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gobject_class->set_property = clutter_behaviour_opacity_set_property;
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gobject_class->get_property = clutter_behaviour_opacity_get_property;
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/**
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* ClutterBehaviourOpacity:opacity-start:
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*
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* Initial opacity level of the behaviour.
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*
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* Since: 0.2
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*
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* Deprecated: 1.6
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*/
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pspec = g_param_spec_uint ("opacity-start",
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P_("Opacity Start"),
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P_("Initial opacity level"),
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0, 255,
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0,
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CLUTTER_PARAM_READWRITE);
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obj_props[PROP_OPACITY_START] = pspec;
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g_object_class_install_property (gobject_class, PROP_OPACITY_START, pspec);
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/**
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* ClutterBehaviourOpacity:opacity-end:
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*
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* Final opacity level of the behaviour.
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*
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* Since: 0.2
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*
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* Deprecated: 1.6
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*/
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pspec = g_param_spec_uint ("opacity-end",
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P_("Opacity End"),
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P_("Final opacity level"),
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0, 255,
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0,
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CLUTTER_PARAM_READWRITE);
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obj_props[PROP_OPACITY_END] = pspec;
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g_object_class_install_property (gobject_class, PROP_OPACITY_END, pspec);
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behave_class->alpha_notify = clutter_behaviour_alpha_notify;
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}
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static void
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clutter_behaviour_opacity_init (ClutterBehaviourOpacity *self)
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{
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self->priv = clutter_behaviour_opacity_get_instance_private (self);
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}
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/**
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* clutter_behaviour_opacity_new:
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* @alpha: (allow-none): a #ClutterAlpha instance, or %NULL
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* @opacity_start: minimum level of opacity
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* @opacity_end: maximum level of opacity
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*
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* Creates a new #ClutterBehaviourOpacity object, driven by @alpha
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* which controls the opacity property of every actor, making it
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* change in the interval between @opacity_start and @opacity_end.
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*
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* If @alpha is not %NULL, the #ClutterBehaviour will take ownership
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* of the #ClutterAlpha instance. In the case when @alpha is %NULL,
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* it can be set later with clutter_behaviour_set_alpha().
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*
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* Return value: the newly created #ClutterBehaviourOpacity
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*
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* Since: 0.2
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*
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* Deprecated: 1.6
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*/
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ClutterBehaviour *
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clutter_behaviour_opacity_new (ClutterAlpha *alpha,
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guint8 opacity_start,
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guint8 opacity_end)
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{
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return g_object_new (CLUTTER_TYPE_BEHAVIOUR_OPACITY,
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"alpha", alpha,
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"opacity-start", opacity_start,
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"opacity-end", opacity_end,
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NULL);
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}
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/**
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* clutter_behaviour_opacity_set_bounds:
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* @behaviour: a #ClutterBehaviourOpacity
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* @opacity_start: minimum level of opacity
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* @opacity_end: maximum level of opacity
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*
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* Sets the initial and final levels of the opacity applied by @behaviour
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* on each actor it controls.
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*
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* Since: 0.6
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*
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* Deprecated: 1.6
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*/
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void
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clutter_behaviour_opacity_set_bounds (ClutterBehaviourOpacity *behaviour,
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guint8 opacity_start,
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guint8 opacity_end)
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{
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ClutterBehaviourOpacityPrivate *priv;
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_OPACITY (behaviour));
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priv = behaviour->priv;
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g_object_freeze_notify (G_OBJECT (behaviour));
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if (priv->opacity_start != opacity_start)
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{
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priv->opacity_start = opacity_start;
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g_object_notify_by_pspec (G_OBJECT (behaviour), obj_props[PROP_OPACITY_START]);
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}
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if (priv->opacity_end != opacity_end)
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{
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priv->opacity_end = opacity_end;
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g_object_notify_by_pspec (G_OBJECT (behaviour), obj_props[PROP_OPACITY_END]);
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}
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g_object_thaw_notify (G_OBJECT (behaviour));
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}
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/**
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* clutter_behaviour_opacity_get_bounds:
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* @behaviour: a #ClutterBehaviourOpacity
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* @opacity_start: (out): return location for the minimum level of opacity, or %NULL
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* @opacity_end: (out): return location for the maximum level of opacity, or %NULL
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*
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* Gets the initial and final levels of the opacity applied by @behaviour
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* on each actor it controls.
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*
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* Since: 0.6
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*
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* Deprecated: 1.6
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*/
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void
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clutter_behaviour_opacity_get_bounds (ClutterBehaviourOpacity *behaviour,
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guint8 *opacity_start,
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guint8 *opacity_end)
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{
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_OPACITY (behaviour));
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if (opacity_start)
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*opacity_start = behaviour->priv->opacity_start;
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if (opacity_end)
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*opacity_end = behaviour->priv->opacity_end;
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}
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