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Add ClutterBehaviourDepth

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ClutterBehaviourDepth is a simple behaviour that controls the depth
property of a set of actors.
This commit is contained in:
Emmanuele Bassi 2007-07-09 21:38:43 +00:00
parent 8ac0298dc4
commit 350bb347d8
3 changed files with 289 additions and 0 deletions
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2
clutter/Makefile.am
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@ -42,6 +42,7 @@ source_h = \
$(srcdir)/clutter-backend.h \
$(srcdir)/clutter-behaviour.h \
$(srcdir)/clutter-behaviour-bspline.h \
$(srcdir)/clutter-behaviour-depth.h \
$(srcdir)/clutter-behaviour-ellipse.h \
$(srcdir)/clutter-behaviour-opacity.h \
$(srcdir)/clutter-behaviour-path.h \
@ -138,6 +139,7 @@ source_c = \
clutter-backend.c \
clutter-behaviour.c \
clutter-behaviour-bspline.c \
clutter-behaviour-depth.c \
clutter-behaviour-ellipse.c \
clutter-behaviour-opacity.c \
clutter-behaviour-path.c \

220
clutter/clutter-behaviour-depth.c Normal file
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@ -0,0 +1,220 @@
/*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#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: Behaviour controlling the depth
*
* #ClutterBehaviourDepth is a simple #ClutterBehaviour controlling the
* depth of a set of actors.
*
* Since: 0.4
*/
G_DEFINE_TYPE (ClutterBehaviourDepth,
clutter_behaviour_depth,
CLUTTER_TYPE_BEHAVIOUR);
struct _ClutterBehaviourDepthPrivate
{
gint min_depth;
gint max_depth;
};
enum
{
PROP_0,
PROP_MIN_DEPTH,
PROP_MAX_DEPTH
};
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,
guint32 alpha_value)
{
ClutterBehaviourDepthPrivate *priv;
gint delta, depth;
priv = CLUTTER_BEHAVIOUR_DEPTH (behaviour)->priv;
if (priv->max_depth > priv->min_depth)
delta = priv->max_depth - priv->min_depth;
else
delta = priv->min_depth - priv->max_depth;
depth = alpha_value * delta / CLUTTER_ALPHA_MAX_ALPHA;
depth += ((priv->max_depth > priv->min_depth) ? priv->max_depth
: priv->min_depth);
CLUTTER_NOTE (BEHAVIOUR, "alpha: %d, depth: %d", alpha_value, depth);
clutter_behaviour_actors_foreach (behaviour,
alpha_notify_foreach,
GINT_TO_POINTER (depth));
}
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_MIN_DEPTH:
depth->priv->min_depth = g_value_get_int (value);
break;
case PROP_MAX_DEPTH:
depth->priv->max_depth = 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_MIN_DEPTH:
g_value_set_int (value, depth->priv->min_depth);
break;
case PROP_MAX_DEPTH:
g_value_set_int (value, depth->priv->max_depth);
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;
/**
* ClutterBehaviourDepth:min-depth:
*
* Minimum depth level to apply to the actors.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_MIN_DEPTH,
g_param_spec_int ("min-depth",
"Minimum Depth",
"Minimum depth to apply",
G_MININT, G_MAXINT, 0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourDepth:max-depth:
*
* Maximum depth level to apply to the actors.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_MAX_DEPTH,
g_param_spec_int ("max-depth",
"Maximum Depth",
"Maximum 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
* @min_depth: minimum depth level
* @max_depth: maximum depth level
*
* 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 min_depth,
gint max_depth)
{
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
return g_object_new (CLUTTER_TYPE_BEHAVIOUR_DEPTH,
"alpha", alpha,
"min-depth", min_depth,
"max-depth", max_depth,
NULL);
}

67
clutter/clutter-behaviour-depth.h Normal file
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@ -0,0 +1,67 @@
/*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __CLUTTER_BEHAVIOUR_DEPTH__
#define __CLUTTER_BEHAVIOUR_DEPTH__
#include <clutter/clutter-actor.h>
#include <clutter/clutter-behaviour.h>
G_BEGIN_DECLS
#define CLUTTER_TYPE_BEHAVIOUR_DEPTH (clutter_behaviour_depth_get_type ())
#define CLUTTER_BEHAVIOUR_DEPTH(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BEHAVIOUR_DEPTH, ClutterBehaviourDepth))
#define CLUTTER_IS_BEHAVIOUR_DEPTH(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BEHAVIOUR_DEPTH))
#define CLUTTER_BEHAVIOUR_DEPTH_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_BEHAVIOUR_DEPTH, ClutterBehaviourDepthClass))
#define CLUTTER_IS_BEHAVIOUR_DEPTH_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_BEHAVIOUR_DEPTH))
#define CLUTTER_BEHAVIOUR_DEPTH_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_BEHAVIOUR_DEPTH, ClutterBehaviourDepthClass))
typedef struct _ClutterBehaviourDepth ClutterBehaviourDepth;
typedef struct _ClutterBehaviourDepthPrivate ClutterBehaviourDepthPrivate;
typedef struct _ClutterBehaviourDepthClass ClutterBehaviourDepthClass;
struct _ClutterBehaviourDepth
{
/*< private >*/
ClutterBehaviour parent_instance;
ClutterBehaviourDepthPrivate *priv;
};
struct _ClutterBehaviourDepthClass
{
ClutterBehaviourClass parent_class;
};
GType clutter_behaviour_depth_get_type (void) G_GNUC_CONST;
ClutterBehaviour *clutter_behaviour_depth_new (ClutterAlpha *alpha,
gint min_depth,
gint max_depth);
G_END_DECLS
#endif /* __CLUTTER_BEHAVIOUR_DEPTH__ */