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mutter/clutter/clutter-behaviour-scale.c
Emmanuele Bassi 02e542eb9f 2008-01-17 Emmanuele Bassi <ebassi@openedhand.com> 
* clutter/clutter-behaviour-scale.c:
	(clutter_behaviour_scale_set_gravity): Notify on the right property
	name.
2008-01-17 14:44:43 +00:00

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/*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-behaviour-scale
* @short_description: A behaviour controlling scale
*
* A #ClutterBehaviourScale interpolates actors size between two values.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-actor.h"
#include "clutter-behaviour.h"
#include "clutter-enum-types.h"
#include "clutter-main.h"
#include "clutter-fixed.h"
#include "clutter-behaviour-scale.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include <math.h>
G_DEFINE_TYPE (ClutterBehaviourScale,
clutter_behaviour_scale,
CLUTTER_TYPE_BEHAVIOUR);
struct _ClutterBehaviourScalePrivate
{
ClutterFixed scale_start[2];
ClutterFixed scale_end[2];
ClutterGravity gravity;
};
#define CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
CLUTTER_TYPE_BEHAVIOUR_SCALE, \
ClutterBehaviourScalePrivate))
enum
{
PROP_0,
PROP_X_SCALE_START,
PROP_Y_SCALE_START,
PROP_X_SCALE_END,
PROP_Y_SCALE_END,
PROP_SCALE_GRAVITY
};
typedef struct {
ClutterFixed scale_x;
ClutterFixed scale_y;
} ScaleFrameClosure;
static void
scale_frame_foreach (ClutterBehaviour *behaviour,
ClutterActor *actor,
gpointer data)
{
ClutterBehaviourScalePrivate *priv =
CLUTTER_BEHAVIOUR_SCALE (behaviour)->priv;
ScaleFrameClosure *closure = data;
ClutterGravity gravity = priv->gravity;
/* Don't mess with the actor anchor point of gravity is set to
* none
*/
if (gravity != CLUTTER_GRAVITY_NONE)
clutter_actor_set_anchor_point_from_gravity (actor, gravity);
clutter_actor_set_scalex (actor, closure->scale_x, closure->scale_y);
}
static void
clutter_behaviour_scale_alpha_notify (ClutterBehaviour *behave,
guint32 alpha_value)
{
ClutterBehaviourScalePrivate *priv;
ClutterFixed scale_x, scale_y, factor;
ScaleFrameClosure closure = { 0, };
priv = CLUTTER_BEHAVIOUR_SCALE (behave)->priv;
factor = CLUTTER_INT_TO_FIXED (alpha_value) / CLUTTER_ALPHA_MAX_ALPHA;
scale_x = CLUTTER_FIXED_MUL (factor,
(priv->scale_end[0] - priv->scale_start[0]));
scale_x += priv->scale_start[0];
scale_y = CLUTTER_FIXED_MUL (factor,
(priv->scale_end[1] - priv->scale_start[1]));
scale_y += priv->scale_start[1];
closure.scale_x = scale_x;
closure.scale_y = scale_y;
clutter_behaviour_actors_foreach (behave,
scale_frame_foreach,
&closure);
}
static void
clutter_behaviour_scale_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourScalePrivate *priv;
priv = CLUTTER_BEHAVIOUR_SCALE (gobject)->priv;
switch (prop_id)
{
case PROP_X_SCALE_START:
priv->scale_start[0] =
CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
break;
case PROP_X_SCALE_END:
priv->scale_end[0] =
CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
break;
case PROP_Y_SCALE_START:
priv->scale_start[1] =
CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
break;
case PROP_Y_SCALE_END:
priv->scale_end[1] =
CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
break;
case PROP_SCALE_GRAVITY:
priv->gravity = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_scale_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourScalePrivate *priv;
priv = CLUTTER_BEHAVIOUR_SCALE (gobject)->priv;
switch (prop_id)
{
case PROP_X_SCALE_START:
g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_start[0]));
break;
case PROP_X_SCALE_END:
g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_end[0]));
break;
case PROP_Y_SCALE_START:
g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_start[1]));
break;
case PROP_Y_SCALE_END:
g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_end[1]));
break;
case PROP_SCALE_GRAVITY:
g_value_set_enum (value, priv->gravity);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_scale_class_init (ClutterBehaviourScaleClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBehaviourClass *behave_class = CLUTTER_BEHAVIOUR_CLASS (klass);
gobject_class->set_property = clutter_behaviour_scale_set_property;
gobject_class->get_property = clutter_behaviour_scale_get_property;
/**
* ClutterBehaviourScale:x-scale-start:
*
* The initial scaling factor on the X axis for the actors.
*
* Since: 0.6
*/
g_object_class_install_property (gobject_class,
PROP_X_SCALE_START,
g_param_spec_double ("x-scale-start",
"X Start Scale",
"Initial scale on the X axis",
0.0, G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourScale:x-scale-end:
*
* The final scaling factor on the X axis for the actors.
*
* Since: 0.6
*/
g_object_class_install_property (gobject_class,
PROP_X_SCALE_END,
g_param_spec_double ("x-scale-end",
"X End Scale",
"Final scale on the X axis",
0.0, G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourScale:y-scale-start:
*
* The initial scaling factor on the Y axis for the actors.
*
* Since: 0.6
*/
g_object_class_install_property (gobject_class,
PROP_Y_SCALE_START,
g_param_spec_double ("y-scale-start",
"Y Start Scale",
"Initial scale on the Y axis",
0.0, G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourScale:y-scale-end:
*
* The final scaling factor on the Y axis for the actors.
*
* Since: 0.6
*/
g_object_class_install_property (gobject_class,
PROP_X_SCALE_END,
g_param_spec_double ("y-scale-end",
"Y End Scale",
"Final scale on the Y axis",
0.0, G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourScale:gravity:
*
* The gravity of the scaling.
*
* Since: 0.2
*/
g_object_class_install_property (gobject_class,
PROP_SCALE_GRAVITY,
g_param_spec_enum ("scale-gravity",
"Scale Gravity",
"The gravity of the scaling",
CLUTTER_TYPE_GRAVITY,
CLUTTER_GRAVITY_CENTER,
CLUTTER_PARAM_READWRITE));
behave_class->alpha_notify = clutter_behaviour_scale_alpha_notify;
g_type_class_add_private (klass, sizeof (ClutterBehaviourScalePrivate));
}
static void
clutter_behaviour_scale_init (ClutterBehaviourScale *self)
{
ClutterBehaviourScalePrivate *priv;
self->priv = priv = CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE (self);
}
/**
* clutter_behaviour_scale_new:
* @alpha: a #ClutterAlpha
* @x_scale_start: initial scale factor on the X axis
* @y_scale_start: initial scale factor on the Y axis
* @x_scale_end: final scale factor on the X axis
* @y_scale_end: final scale factor on the Y axis
* @gravity: a #ClutterGravity for the scale.
*
* Creates a new #ClutterBehaviourScale instance.
*
* Return value: the newly created #ClutterBehaviourScale
*
* Since: 0.2
*/
ClutterBehaviour *
clutter_behaviour_scale_new (ClutterAlpha *alpha,
gdouble x_scale_start,
gdouble y_scale_start,
gdouble x_scale_end,
gdouble y_scale_end,
ClutterGravity gravity)
{
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
return clutter_behaviour_scale_newx (alpha,
CLUTTER_FLOAT_TO_FIXED (x_scale_start),
CLUTTER_FLOAT_TO_FIXED (y_scale_start),
CLUTTER_FLOAT_TO_FIXED (x_scale_end),
CLUTTER_FLOAT_TO_FIXED (y_scale_end),
gravity);
}
/**
* clutter_behaviour_scale_newx:
* @alpha: a #ClutterAlpha
* @x_scale_start: initial scale factor on the X axis
* @y_scale_start: initial scale factor on the Y axis
* @x_scale_end: final scale factor on the X axis
* @y_scale_end: final scale factor on the Y axis
* @gravity: a #ClutterGravity for the scale.
*
* A fixed point implementation of clutter_behaviour_scale_new()
*
* Return value: the newly created #ClutterBehaviourScale
*
* Since: 0.2
*/
ClutterBehaviour *
clutter_behaviour_scale_newx (ClutterAlpha *alpha,
ClutterFixed x_scale_start,
ClutterFixed y_scale_start,
ClutterFixed x_scale_end,
ClutterFixed y_scale_end,
ClutterGravity gravity)
{
ClutterBehaviourScale *behave;
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
behave = g_object_new (CLUTTER_TYPE_BEHAVIOUR_SCALE, "alpha", alpha, NULL);
behave->priv->scale_start[0] = x_scale_start;
behave->priv->scale_start[1] = y_scale_start;
behave->priv->scale_end[0] = x_scale_end;
behave->priv->scale_end[1] = y_scale_end;
behave->priv->gravity = gravity;
return CLUTTER_BEHAVIOUR (behave);
}
/**
* clutter_behaviour_scale_set_bounds:
* @scale: a #ClutterBehaviourScale
* @x_scale_start: initial scale factor on the X axis
* @y_scale_start: initial scale factor on the Y axis
* @x_scale_end: final scale factor on the X axis
* @y_scale_end: final scale factor on the Y axis
*
* Sets the bounds used by scale behaviour.
*
* Since: 0.6
*/
void
clutter_behaviour_scale_set_bounds (ClutterBehaviourScale *scale,
gdouble x_scale_start,
gdouble y_scale_start,
gdouble x_scale_end,
gdouble y_scale_end)
{
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
clutter_behaviour_scale_set_boundsx (scale,
CLUTTER_FLOAT_TO_FIXED (x_scale_start),
CLUTTER_FLOAT_TO_FIXED (y_scale_start),
CLUTTER_FLOAT_TO_FIXED (x_scale_end),
CLUTTER_FLOAT_TO_FIXED (y_scale_end));
}
/**
* clutter_behaviour_scale_get_bounds:
* @scale: a #ClutterBehaviourScale
* @x_scale_start: return location for the initial scale factor on the X
* axis, or %NULL
* @y_scale_start: return location for the initial scale factor on the Y
* axis, or %NULL
* @x_scale_end: return location for the final scale factor on the X axis,
* or %NULL
* @y_scale_end: return location for the final scale factor on the Y axis,
* or %NULL
*
* Retrieves the bounds used by scale behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_scale_get_bounds (ClutterBehaviourScale *scale,
gdouble *x_scale_start,
gdouble *y_scale_start,
gdouble *x_scale_end,
gdouble *y_scale_end)
{
ClutterBehaviourScalePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
priv = scale->priv;
if (x_scale_start)
*x_scale_start = CLUTTER_FIXED_TO_DOUBLE (priv->scale_start[0]);
if (x_scale_end)
*x_scale_end = CLUTTER_FIXED_TO_DOUBLE (priv->scale_end[0]);
if (y_scale_start)
*y_scale_start = CLUTTER_FIXED_TO_DOUBLE (priv->scale_start[1]);
if (y_scale_end)
*y_scale_end = CLUTTER_FIXED_TO_DOUBLE (priv->scale_end[1]);
}
/**
* clutter_behaviour_scale_set_boundsx:
* @scale: a #ClutterBehaviourScale
* @x_scale_start: initial scale factor on the X axis
* @y_scale_start: initial scale factor on the Y axis
* @x_scale_end: final scale factor on the X axis
* @y_scale_end: final scale factor on the Y axis
*
* Fixed point version of clutter_behaviour_scale_set_bounds().
*
* Sets the bounds used by scale behaviour.
*
* Since: 0.6
*/
void
clutter_behaviour_scale_set_boundsx (ClutterBehaviourScale *scale,
ClutterFixed x_scale_start,
ClutterFixed y_scale_start,
ClutterFixed x_scale_end,
ClutterFixed y_scale_end)
{
ClutterBehaviourScalePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
priv = scale->priv;
g_object_freeze_notify (G_OBJECT (scale));
if (priv->scale_start[0] != x_scale_start)
{
priv->scale_start[0] = x_scale_start;
g_object_notify (G_OBJECT (scale), "x-scale-start");
}
if (priv->scale_start[1] != y_scale_start)
{
priv->scale_start[1] = y_scale_start;
g_object_notify (G_OBJECT (scale), "y-scale-start");
}
if (priv->scale_end[0] != x_scale_end)
{
priv->scale_end[0] = x_scale_end;
g_object_notify (G_OBJECT (scale), "x-scale-end");
}
if (priv->scale_end[1] != y_scale_end)
{
priv->scale_end[1] = y_scale_end;
g_object_notify (G_OBJECT (scale), "y-scale-end");
}
g_object_thaw_notify (G_OBJECT (scale));
}
/**
* clutter_behaviour_scale_get_boundsx:
* @scale: a #ClutterBehaviourScale
* @x_scale_start: return location for the initial scale factor on the X
* axis, or %NULL
* @y_scale_start: return location for the initial scale factor on the Y
* axis, or %NULL
* @x_scale_end: return location for the final scale factor on the X axis,
* or %NULL
* @y_scale_end: return location for the final scale factor on the Y axis,
* or %NULL
*
* Fixed point version of clutter_behaviour_scale_get_bounds().
*
* Retrieves the bounds used by scale behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_scale_get_boundsx (ClutterBehaviourScale *scale,
ClutterFixed *x_scale_start,
ClutterFixed *y_scale_start,
ClutterFixed *x_scale_end,
ClutterFixed *y_scale_end)
{
ClutterBehaviourScalePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
priv = scale->priv;
if (x_scale_start)
*x_scale_start = priv->scale_start[0];
if (x_scale_end)
*x_scale_end = priv->scale_end[0];
if (y_scale_start)
*y_scale_start = priv->scale_start[1];
if (y_scale_end)
*y_scale_end = priv->scale_end[1];
}
/**
* clutter_behaviour_scale_set_gravity:
* @scale: a #ClutterBehaviourScale
* @gravity: the gravity of the scaling
*
* Sets the #ClutterGravity applied by the scale behaviour.
*
* Since: 0.6
*/
void
clutter_behaviour_scale_set_gravity (ClutterBehaviourScale *scale,
ClutterGravity gravity)
{
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
if (scale->priv->gravity != gravity)
{
scale->priv->gravity = gravity;
g_object_notify (G_OBJECT (scale), "scale-gravity");
}
}
/**
* clutter_behaviour_scale_get_gravity:
* @scale: a #ClutterBehaviourScale
*
* Retrieves the #ClutterGravity applied by the scale behaviour.
*
* Return value: the gravity used by the behaviour
*
* Since: 0.4
*/
ClutterGravity
clutter_behaviour_scale_get_gravity (ClutterBehaviourScale *scale)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale), CLUTTER_GRAVITY_NONE);
return scale->priv->gravity;
}
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