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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
* Jorn Baayen <jorn@openedhand.com>
* Emmanuele Bassi <ebassi@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/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-behaviour-depth.h"
#include "clutter-enum-types.h"
#include "clutter-main.h"
#include "clutter-debug.h"
#include "clutter-private.h"
/**
* SECTION:clutter-behaviour-depth
* @short_description: A behaviour controlling the Z position
*
* #ClutterBehaviourDepth is a simple #ClutterBehaviour controlling the
* depth of a set of actors between a start and end depth.
*
* #ClutterBehaviourDepth is available since Clutter 0.4.
*/
G_DEFINE_TYPE (ClutterBehaviourDepth,
clutter_behaviour_depth,
CLUTTER_TYPE_BEHAVIOUR);
struct _ClutterBehaviourDepthPrivate
{
gint depth_start;
gint depth_end;
};
enum
{
PROP_0,
PROP_DEPTH_START,
PROP_DEPTH_END
};
static void
alpha_notify_foreach (ClutterBehaviour *behaviour,
ClutterActor *actor,
gpointer user_data)
{
clutter_actor_set_depth (actor, GPOINTER_TO_INT (user_data));
}
static void
clutter_behaviour_depth_alpha_notify (ClutterBehaviour *behaviour,
gdouble alpha_value)
{
ClutterBehaviourDepthPrivate *priv;
gint depth;
priv = CLUTTER_BEHAVIOUR_DEPTH (behaviour)->priv;
/* Need to create factor as to avoid borking signedness */
depth = (alpha_value * (priv->depth_end - priv->depth_start))
+ priv->depth_start;
CLUTTER_NOTE (BEHAVIOUR, "alpha: %.4f, depth: %d", alpha_value, depth);
clutter_behaviour_actors_foreach (behaviour,
alpha_notify_foreach,
GINT_TO_POINTER (depth));
}
static void
clutter_behaviour_depth_applied (ClutterBehaviour *behaviour,
ClutterActor *actor)
{
ClutterBehaviourDepth *depth = CLUTTER_BEHAVIOUR_DEPTH (behaviour);
clutter_actor_set_depth (actor, depth->priv->depth_start);
}
static void
clutter_behaviour_depth_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourDepth *depth = CLUTTER_BEHAVIOUR_DEPTH (gobject);
switch (prop_id)
{
case PROP_DEPTH_START:
depth->priv->depth_start = g_value_get_int (value);
break;
case PROP_DEPTH_END:
depth->priv->depth_end = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_depth_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourDepth *depth = CLUTTER_BEHAVIOUR_DEPTH (gobject);
switch (prop_id)
{
case PROP_DEPTH_START:
g_value_set_int (value, depth->priv->depth_start);
break;
case PROP_DEPTH_END:
g_value_set_int (value, depth->priv->depth_end);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_depth_class_init (ClutterBehaviourDepthClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBehaviourClass *behaviour_class = CLUTTER_BEHAVIOUR_CLASS (klass);
g_type_class_add_private (klass, sizeof (ClutterBehaviourDepthPrivate));
gobject_class->set_property = clutter_behaviour_depth_set_property;
gobject_class->get_property = clutter_behaviour_depth_get_property;
behaviour_class->alpha_notify = clutter_behaviour_depth_alpha_notify;
behaviour_class->applied = clutter_behaviour_depth_applied;
/**
* ClutterBehaviourDepth:depth-start:
*
* Start depth level to apply to the actors.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_DEPTH_START,
g_param_spec_int ("depth-start",
"Start Depth",
"Initial depth to apply",
G_MININT, G_MAXINT, 0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourDepth:depth-end:
*
* End depth level to apply to the actors.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_DEPTH_END,
g_param_spec_int ("depth-end",
"End Depth",
"Final depth to apply",
G_MININT, G_MAXINT, 0,
CLUTTER_PARAM_READWRITE));
}
static void
clutter_behaviour_depth_init (ClutterBehaviourDepth *depth)
{
depth->priv = G_TYPE_INSTANCE_GET_PRIVATE (depth,
CLUTTER_TYPE_BEHAVIOUR_DEPTH,
ClutterBehaviourDepthPrivate);
}
/**
* clutter_behaviour_depth_new:
* @alpha: a #ClutterAlpha or %NULL
* @depth_start: initial value of the depth
* @depth_end: final value of the depth
*
* Creates a new #ClutterBehaviourDepth which can be used to control
* the ClutterActor:depth property of a set of #ClutterActor<!-- -->s.
*
* Return value: the newly created behaviour
*
* Since: 0.4
*/
ClutterBehaviour *
clutter_behaviour_depth_new (ClutterAlpha *alpha,
gint depth_start,
gint depth_end)
{
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
return g_object_new (CLUTTER_TYPE_BEHAVIOUR_DEPTH,
"alpha", alpha,
"depth-start", depth_start,
"depth-end", depth_end,
NULL);
}
/**
* clutter_behaviour_depth_set_bounds:
* @behaviour: a #ClutterBehaviourDepth
* @depth_start: initial value of the depth
* @depth_end: final value of the depth
*
* Sets the boundaries of the @behaviour.
*
* Since: 0.6
*/
void
clutter_behaviour_depth_set_bounds (ClutterBehaviourDepth *behaviour,
gint depth_start,
gint depth_end)
{
ClutterBehaviourDepthPrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_DEPTH (behaviour));
priv = behaviour->priv;
g_object_freeze_notify (G_OBJECT (behaviour));
if (priv->depth_start != depth_start)
{
priv->depth_start = depth_start;
g_object_notify (G_OBJECT (behaviour), "depth-start");
}
if (priv->depth_end != depth_end)
{
priv->depth_end = depth_end;
g_object_notify (G_OBJECT (behaviour), "depth-end");
}
g_object_thaw_notify (G_OBJECT (behaviour));
}
/**
* clutter_behaviour_depth_get_bounds:
* @behaviour: a #ClutterBehaviourDepth
* @depth_start: return location for the initial depth value, or %NULL
* @depth_end: return location for the final depth value, or %NULL
*
* Gets the boundaries of the @behaviour
*
* Since: 0.6
*/
void
clutter_behaviour_depth_get_bounds (ClutterBehaviourDepth *behaviour,
gint *depth_start,
gint *depth_end)
{
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_DEPTH (behaviour));
if (depth_start)
*depth_start = behaviour->priv->depth_start;
if (depth_end)
*depth_end = behaviour->priv->depth_end;
}
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