mirror of
https://github.com/brl/mutter.git
synced 2024-12-12 06:10:17 +00:00
fd27ca7398
Both the nick and the blurb fields should be translatable, for UI builders and other introspection-based tools.
305 lines
8.6 KiB
C
305 lines
8.6 KiB
C
/*
|
|
* 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
|
|
* @short_description: A behaviour controlling opacity
|
|
*
|
|
* #ClutterBehaviourPath interpolates actors opacity between two values.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "clutter-actor.h"
|
|
#include "clutter-behaviour.h"
|
|
#include "clutter-behaviour-opacity.h"
|
|
#include "clutter-enum-types.h"
|
|
#include "clutter-main.h"
|
|
#include "clutter-private.h"
|
|
#include "clutter-debug.h"
|
|
|
|
#include <math.h>
|
|
|
|
/**
|
|
* SECTION:clutter-behaviour-opacity
|
|
* @short_description: Behaviour controlling the opacity
|
|
*
|
|
* #ClutterBehaviourOpacity controls the opacity of a set of actors.
|
|
*
|
|
* Since: 0.2
|
|
*/
|
|
|
|
G_DEFINE_TYPE (ClutterBehaviourOpacity,
|
|
clutter_behaviour_opacity,
|
|
CLUTTER_TYPE_BEHAVIOUR);
|
|
|
|
struct _ClutterBehaviourOpacityPrivate
|
|
{
|
|
guint8 opacity_start;
|
|
guint8 opacity_end;
|
|
};
|
|
|
|
#define CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE(obj) \
|
|
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
|
|
CLUTTER_TYPE_BEHAVIOUR_OPACITY, \
|
|
ClutterBehaviourOpacityPrivate))
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
|
|
PROP_OPACITY_START,
|
|
PROP_OPACITY_END
|
|
};
|
|
|
|
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 (BEHAVIOUR, "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;
|
|
|
|
g_type_class_add_private (klass, sizeof (ClutterBehaviourOpacityPrivate));
|
|
|
|
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
|
|
*/
|
|
pspec = g_param_spec_uint ("opacity-start",
|
|
P_("Opacity Start"),
|
|
P_("Initial opacity level"),
|
|
0, 255,
|
|
0,
|
|
CLUTTER_PARAM_READWRITE);
|
|
g_object_class_install_property (gobject_class, PROP_OPACITY_START, pspec);
|
|
|
|
/**
|
|
* ClutterBehaviourOpacity:opacity-end:
|
|
*
|
|
* Final opacity level of the behaviour.
|
|
*
|
|
* Since: 0.2
|
|
*/
|
|
pspec = g_param_spec_uint ("opacity-end",
|
|
P_("Opacity End"),
|
|
P_("Final opacity level"),
|
|
0, 255,
|
|
0,
|
|
CLUTTER_PARAM_READWRITE);
|
|
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_PRIVATE (self);
|
|
|
|
self->priv->opacity_start = 0;
|
|
self->priv->opacity_end = 0;
|
|
}
|
|
|
|
/**
|
|
* clutter_behaviour_opacity_new:
|
|
* @alpha: 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.
|
|
*
|
|
* Return value: the newly created #ClutterBehaviourOpacity
|
|
*
|
|
* Since: 0.2
|
|
*/
|
|
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
|
|
*/
|
|
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 (G_OBJECT (behaviour), "opacity-start");
|
|
}
|
|
|
|
if (priv->opacity_end != opacity_end)
|
|
{
|
|
priv->opacity_end = opacity_end;
|
|
|
|
g_object_notify (G_OBJECT (behaviour), "opacity-end");
|
|
}
|
|
|
|
g_object_thaw_notify (G_OBJECT (behaviour));
|
|
}
|
|
|
|
/**
|
|
* clutter_behaviour_opacity_get_bounds:
|
|
* @behaviour: a #ClutterBehaviourOpacity
|
|
* @opacity_start: return location for the minimum level of opacity, or %NULL
|
|
* @opacity_end: 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
|
|
*/
|
|
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;
|
|
}
|