/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:clutter-behaviour-opacity
* @Title: ClutterBehaviourOpacity
* @short_description: A behaviour controlling opacity
* @Deprecated: 1.6: Use clutter_actor_animate() instead.
*
* #ClutterBehaviourOpacity controls the opacity of a set of actors.
*
* Since: 0.2
*
* Deprecated: 1.6: Use the #ClutterActor:opacity property and
* clutter_actor_animate(), or #ClutterAnimator, or #ClutterState
* instead.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#define CLUTTER_DISABLE_DEPRECATION_WARNINGS
#include "clutter-alpha.h"
#include "clutter-behaviour.h"
#include "clutter-behaviour-opacity.h"
#include "clutter-private.h"
#include "clutter-debug.h"
struct _ClutterBehaviourOpacityPrivate
{
guint8 opacity_start;
guint8 opacity_end;
};
enum
{
PROP_0,
PROP_OPACITY_START,
PROP_OPACITY_END,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
G_DEFINE_TYPE_WITH_PRIVATE (ClutterBehaviourOpacity,
clutter_behaviour_opacity,
CLUTTER_TYPE_BEHAVIOUR)
static void
alpha_notify_foreach (ClutterBehaviour *behaviour,
ClutterActor *actor,
gpointer data)
{
clutter_actor_set_opacity (actor, GPOINTER_TO_UINT(data));
}
static void
clutter_behaviour_alpha_notify (ClutterBehaviour *behave,
gdouble alpha_value)
{
ClutterBehaviourOpacityPrivate *priv;
guint8 opacity;
priv = CLUTTER_BEHAVIOUR_OPACITY (behave)->priv;
opacity = alpha_value
* (priv->opacity_end - priv->opacity_start)
+ priv->opacity_start;
CLUTTER_NOTE (ANIMATION, "alpha: %.4f, opacity: %u",
alpha_value,
opacity);
clutter_behaviour_actors_foreach (behave,
alpha_notify_foreach,
GUINT_TO_POINTER ((guint) opacity));
}
static void
clutter_behaviour_opacity_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
switch (prop_id)
{
case PROP_OPACITY_START:
clutter_behaviour_opacity_set_bounds (self,
g_value_get_uint (value),
self->priv->opacity_end);
break;
case PROP_OPACITY_END:
clutter_behaviour_opacity_set_bounds (self,
self->priv->opacity_start,
g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_opacity_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
switch (prop_id)
{
case PROP_OPACITY_START:
g_value_set_uint (value, self->priv->opacity_start);
break;
case PROP_OPACITY_END:
g_value_set_uint (value, self->priv->opacity_end);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_opacity_class_init (ClutterBehaviourOpacityClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBehaviourClass *behave_class = CLUTTER_BEHAVIOUR_CLASS (klass);
GParamSpec *pspec;
gobject_class->set_property = clutter_behaviour_opacity_set_property;
gobject_class->get_property = clutter_behaviour_opacity_get_property;
/**
* ClutterBehaviourOpacity:opacity-start:
*
* Initial opacity level of the behaviour.
*
* Since: 0.2
*
* Deprecated: 1.6
*/
pspec = g_param_spec_uint ("opacity-start",
P_("Opacity Start"),
P_("Initial opacity level"),
0, 255,
0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_OPACITY_START] = pspec;
g_object_class_install_property (gobject_class, PROP_OPACITY_START, pspec);
/**
* ClutterBehaviourOpacity:opacity-end:
*
* Final opacity level of the behaviour.
*
* Since: 0.2
*
* Deprecated: 1.6
*/
pspec = g_param_spec_uint ("opacity-end",
P_("Opacity End"),
P_("Final opacity level"),
0, 255,
0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_OPACITY_END] = pspec;
g_object_class_install_property (gobject_class, PROP_OPACITY_END, pspec);
behave_class->alpha_notify = clutter_behaviour_alpha_notify;
}
static void
clutter_behaviour_opacity_init (ClutterBehaviourOpacity *self)
{
self->priv = clutter_behaviour_opacity_get_instance_private (self);
}
/**
* clutter_behaviour_opacity_new:
* @alpha: (allow-none): a #ClutterAlpha instance, or %NULL
* @opacity_start: minimum level of opacity
* @opacity_end: maximum level of opacity
*
* Creates a new #ClutterBehaviourOpacity object, driven by @alpha
* which controls the opacity property of every actor, making it
* change in the interval between @opacity_start and @opacity_end.
*
* If @alpha is not %NULL, the #ClutterBehaviour will take ownership
* of the #ClutterAlpha instance. In the case when @alpha is %NULL,
* it can be set later with clutter_behaviour_set_alpha().
*
* Return value: the newly created #ClutterBehaviourOpacity
*
* Since: 0.2
*
* Deprecated: 1.6
*/
ClutterBehaviour *
clutter_behaviour_opacity_new (ClutterAlpha *alpha,
guint8 opacity_start,
guint8 opacity_end)
{
return g_object_new (CLUTTER_TYPE_BEHAVIOUR_OPACITY,
"alpha", alpha,
"opacity-start", opacity_start,
"opacity-end", opacity_end,
NULL);
}
/**
* clutter_behaviour_opacity_set_bounds:
* @behaviour: a #ClutterBehaviourOpacity
* @opacity_start: minimum level of opacity
* @opacity_end: maximum level of opacity
*
* Sets the initial and final levels of the opacity applied by @behaviour
* on each actor it controls.
*
* Since: 0.6
*
* Deprecated: 1.6
*/
void
clutter_behaviour_opacity_set_bounds (ClutterBehaviourOpacity *behaviour,
guint8 opacity_start,
guint8 opacity_end)
{
ClutterBehaviourOpacityPrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_OPACITY (behaviour));
priv = behaviour->priv;
g_object_freeze_notify (G_OBJECT (behaviour));
if (priv->opacity_start != opacity_start)
{
priv->opacity_start = opacity_start;
g_object_notify_by_pspec (G_OBJECT (behaviour), obj_props[PROP_OPACITY_START]);
}
if (priv->opacity_end != opacity_end)
{
priv->opacity_end = opacity_end;
g_object_notify_by_pspec (G_OBJECT (behaviour), obj_props[PROP_OPACITY_END]);
}
g_object_thaw_notify (G_OBJECT (behaviour));
}
/**
* clutter_behaviour_opacity_get_bounds:
* @behaviour: a #ClutterBehaviourOpacity
* @opacity_start: (out): return location for the minimum level of opacity, or %NULL
* @opacity_end: (out): return location for the maximum level of opacity, or %NULL
*
* Gets the initial and final levels of the opacity applied by @behaviour
* on each actor it controls.
*
* Since: 0.6
*
* Deprecated: 1.6
*/
void
clutter_behaviour_opacity_get_bounds (ClutterBehaviourOpacity *behaviour,
guint8 *opacity_start,
guint8 *opacity_end)
{
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_OPACITY (behaviour));
if (opacity_start)
*opacity_start = behaviour->priv->opacity_start;
if (opacity_end)
*opacity_end = behaviour->priv->opacity_end;
}