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mutter/clutter/clutter-behaviour-rotate.c
Emmanuele Bassi 79acb088e7 Remove mentions of the FSF address 
Since using addresses that might change is something that finally
the FSF acknowledge as a plausible scenario (after changing address
twice), the license blurb in the source files should use the URI
for getting the license in case the library did not come with it.

Not that URIs cannot possibly change, but at least it's easier to
set up a redirection at the same place.

As a side note: this commit closes the oldes bug in Clutter's bug
report tool.

http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 12:56:10 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2007 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-rotate
* @short_description: A behaviour controlling rotation
*
* A #ClutterBehaviourRotate rotate actors between a starting and ending
* angle on a given axis.
*
* The #ClutterBehaviourRotate is available since version 0.4.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-actor.h"
#include "clutter-behaviour.h"
#include "clutter-main.h"
#include "clutter-fixed.h"
#include "clutter-behaviour-rotate.h"
#include "clutter-enum-types.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include <math.h>
G_DEFINE_TYPE (ClutterBehaviourRotate,
clutter_behaviour_rotate,
CLUTTER_TYPE_BEHAVIOUR);
struct _ClutterBehaviourRotatePrivate
{
gdouble angle_start;
gdouble angle_end;
ClutterRotateAxis axis;
ClutterRotateDirection direction;
gint center_x;
gint center_y;
gint center_z;
};
#define CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
CLUTTER_TYPE_BEHAVIOUR_ROTATE, \
ClutterBehaviourRotatePrivate))
enum
{
PROP_0,
PROP_ANGLE_START,
PROP_ANGLE_END,
PROP_AXIS,
PROP_DIRECTION,
PROP_CENTER_X,
PROP_CENTER_Y,
PROP_CENTER_Z
};
typedef struct {
gdouble angle;
} RotateFrameClosure;
static void
alpha_notify_foreach (ClutterBehaviour *behaviour,
ClutterActor *actor,
gpointer data)
{
RotateFrameClosure *closure = data;
ClutterBehaviourRotate *rotate_behaviour;
ClutterBehaviourRotatePrivate *priv;
rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
priv = rotate_behaviour->priv;
clutter_actor_set_rotation (actor, priv->axis,
closure->angle,
priv->center_x,
priv->center_y,
priv->center_z);
}
static inline float
clamp_angle (float a)
{
float a1, a2;
gint rounds;
rounds = a / 360.0;
a1 = rounds * 360.0;
a2 = a - a1;
return a2;
}
static void
clutter_behaviour_rotate_alpha_notify (ClutterBehaviour *behaviour,
gdouble alpha_value)
{
ClutterBehaviourRotate *rotate_behaviour;
ClutterBehaviourRotatePrivate *priv;
RotateFrameClosure closure;
gdouble start, end;
rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
priv = rotate_behaviour->priv;
closure.angle = 0;
start = priv->angle_start;
end = priv->angle_end;
if (priv->direction == CLUTTER_ROTATE_CW && start >= end)
end += 360.0;
else if (priv->direction == CLUTTER_ROTATE_CCW && start <= end)
end -= 360.0;
closure.angle = (end - start) * alpha_value + start;
clutter_behaviour_actors_foreach (behaviour,
alpha_notify_foreach,
&closure);
}
static void
clutter_behaviour_rotate_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourRotate *rotate;
ClutterBehaviourRotatePrivate *priv;
rotate = CLUTTER_BEHAVIOUR_ROTATE (gobject);
priv = rotate->priv;
switch (prop_id)
{
case PROP_ANGLE_START:
priv->angle_start = g_value_get_double (value);
break;
case PROP_ANGLE_END:
priv->angle_end = g_value_get_double (value);
break;
case PROP_AXIS:
priv->axis = g_value_get_enum (value);
break;
case PROP_DIRECTION:
priv->direction = g_value_get_enum (value);
break;
case PROP_CENTER_X:
clutter_behaviour_rotate_set_center (rotate,
g_value_get_int (value),
priv->center_y,
priv->center_z);
break;
case PROP_CENTER_Y:
clutter_behaviour_rotate_set_center (rotate,
priv->center_x,
g_value_get_int (value),
priv->center_z);
break;
case PROP_CENTER_Z:
clutter_behaviour_rotate_set_center (rotate,
priv->center_x,
priv->center_y,
g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_rotate_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourRotatePrivate *priv;
priv = CLUTTER_BEHAVIOUR_ROTATE (gobject)->priv;
switch (prop_id)
{
case PROP_ANGLE_START:
g_value_set_double (value, priv->angle_start);
break;
case PROP_ANGLE_END:
g_value_set_double (value, priv->angle_end);
break;
case PROP_AXIS:
g_value_set_enum (value, priv->axis);
break;
case PROP_DIRECTION:
g_value_set_enum (value, priv->direction);
break;
case PROP_CENTER_X:
g_value_set_int (value, priv->center_x);
break;
case PROP_CENTER_Y:
g_value_set_int (value, priv->center_y);
break;
case PROP_CENTER_Z:
g_value_set_int (value, priv->center_z);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_rotate_class_init (ClutterBehaviourRotateClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBehaviourClass *behaviour_class = CLUTTER_BEHAVIOUR_CLASS (klass);
GParamSpec *pspec = NULL;
g_type_class_add_private (klass, sizeof (ClutterBehaviourRotatePrivate));
gobject_class->set_property = clutter_behaviour_rotate_set_property;
gobject_class->get_property = clutter_behaviour_rotate_get_property;
behaviour_class->alpha_notify = clutter_behaviour_rotate_alpha_notify;
/**
* ClutterBehaviourRotate:angle-start:
*
* The initial angle from whence the rotation should start.
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-start",
"Angle Begin",
"Initial angle",
0.0, 360.0,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_ANGLE_START,
pspec);
/**
* ClutterBehaviourRotate:angle-end:
*
* The final angle to where the rotation should end.
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-end",
"Angle End",
"Final angle",
0.0, 360.0,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_ANGLE_END,
pspec);
/**
* ClutterBehaviourRotate:axis:
*
* The axis of rotation.
*
* Since: 0.4
*/
pspec = g_param_spec_enum ("axis",
"Axis",
"Axis of rotation",
CLUTTER_TYPE_ROTATE_AXIS,
CLUTTER_Z_AXIS,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_AXIS,
pspec);
/**
* ClutterBehaviourRotate:direction:
*
* The direction of the rotation.
*
* Since: 0.4
*/
pspec = g_param_spec_enum ("direction",
"Direction",
"Direction of rotation",
CLUTTER_TYPE_ROTATE_DIRECTION,
CLUTTER_ROTATE_CW,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_DIRECTION,
pspec);
/**
* ClutterBehaviourRotate:center-x:
*
* The x center of rotation.
*
* Since: 0.4
*/
pspec = g_param_spec_int ("center-x",
"Center-X",
"X center of rotation",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_CENTER_X,
pspec);
/**
* ClutterBehaviourRotate:center-y:
*
* The y center of rotation.
*
* Since: 0.4
*/
pspec = g_param_spec_int ("center-y",
"Center-Y",
"Y center of rotation",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_CENTER_Y,
pspec);
/**
* ClutterBehaviourRotate:center-z:
*
* The z center of rotation.
*
* Since: 0.4
*/
pspec = g_param_spec_int ("center-z",
"Center-Z",
"Z center of rotation",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_CENTER_Z,
pspec);
}
static void
clutter_behaviour_rotate_init (ClutterBehaviourRotate *rotate)
{
ClutterBehaviourRotatePrivate *priv;
rotate->priv = priv = CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE (rotate);
priv->angle_start = priv->angle_end = 0;
priv->axis = CLUTTER_Z_AXIS;
priv->direction = CLUTTER_ROTATE_CW;
priv->center_x = priv->center_y = priv->center_z = 0;
}
/**
* clutter_behaviour_rotate_new:
* @alpha: a #ClutterAlpha, or %NULL
* @axis: the rotation axis
* @direction: the rotation direction
* @angle_start: the starting angle in degrees, between 0 and 360.
* @angle_end: the final angle in degrees, between 0 and 360.
*
* Creates a new #ClutterBehaviourRotate. This behaviour will rotate actors
* bound to it on @axis, following @direction, between @angle_start and
* @angle_end. Angles >= 360 degrees will be clamped to the canonical interval
* <0, 360), if angle_start == angle_end, the behaviour will carry out a
* single rotation of 360 degrees.
*
* Return value: the newly created #ClutterBehaviourRotate.
*
* Since: 0.4
*/
ClutterBehaviour *
clutter_behaviour_rotate_new (ClutterAlpha *alpha,
ClutterRotateAxis axis,
ClutterRotateDirection direction,
gdouble angle_start,
gdouble angle_end)
{
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
return g_object_new (CLUTTER_TYPE_BEHAVIOUR_ROTATE,
"alpha", alpha,
"axis", axis,
"direction", direction,
"angle-start", angle_start,
"angle-end", angle_end,
NULL);
}
/**
* clutter_behaviour_rotate_get_axis:
* @rotate: a #ClutterBehaviourRotate
*
* Retrieves the #ClutterRotateAxis used by the rotate behaviour.
*
* Return value: the rotation axis
*
* Since: 0.4
*/
ClutterRotateAxis
clutter_behaviour_rotate_get_axis (ClutterBehaviourRotate *rotate)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate), CLUTTER_Z_AXIS);
return rotate->priv->axis;
}
/**
* clutter_behaviour_rotate_set_axis:
* @rotate: a #ClutterBehaviourRotate
* @axis: a #ClutterRotateAxis
*
* Sets the axis used by the rotate behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_axis (ClutterBehaviourRotate *rotate,
ClutterRotateAxis axis)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (priv->axis != axis)
{
priv->axis = axis;
g_object_notify (G_OBJECT (rotate), "axis");
}
}
/**
* clutter_behaviour_rotate_get_direction:
* @rotate: a #ClutterBehaviourRotate
*
* Retrieves the #ClutterRotateDirection used by the rotate behaviour.
*
* Return value: the rotation direction
*
* Since: 0.4
*/
ClutterRotateDirection
clutter_behaviour_rotate_get_direction (ClutterBehaviourRotate *rotate)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate),
CLUTTER_ROTATE_CW);
return rotate->priv->direction;
}
/**
* clutter_behaviour_rotate_set_direction:
* @rotate: a #ClutterBehaviourRotate
* @direction: the rotation direction
*
* Sets the rotation direction used by the rotate behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_direction (ClutterBehaviourRotate *rotate,
ClutterRotateDirection direction)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (priv->direction != direction)
{
priv->direction = direction;
g_object_notify (G_OBJECT (rotate), "direction");
}
}
/**
* clutter_behaviour_rotate_get_bounds:
* @rotate: a #ClutterBehaviourRotate
* @angle_start: return value for the initial angle
* @angle_end: return value for the final angle
*
* Retrieves the rotation boundaries of the rotate behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_get_bounds (ClutterBehaviourRotate *rotate,
gdouble *angle_start,
gdouble *angle_end)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (angle_start)
*angle_start = priv->angle_start;
if (angle_end)
*angle_end = priv->angle_end;
}
/**
* clutter_behaviour_rotate_set_bounds:
* @rotate: a #ClutterBehaviourRotate
* @angle_start: initial angle in degrees, between 0 and 360.
* @angle_end: final angle in degrees, between 0 and 360.
*
* Sets the initial and final angles of a rotation behaviour; angles >= 360
* degrees get clamped to the canonical interval <0, 360).
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_bounds (ClutterBehaviourRotate *rotate,
gdouble angle_start,
gdouble angle_end)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
g_object_freeze_notify (G_OBJECT (rotate));
if (priv->angle_start != angle_start)
{
priv->angle_start = clamp_angle (angle_start);
g_object_notify (G_OBJECT (rotate), "angle-start");
}
if (priv->angle_end != angle_end)
{
priv->angle_end = clamp_angle (angle_end);
g_object_notify (G_OBJECT (rotate), "angle-end");
}
g_object_thaw_notify (G_OBJECT (rotate));
}
/**
* clutter_behaviour_rotate_set_center:
* @rotate: a #ClutterBehaviourRotate
* @x: X axis center of rotation
* @y: Y axis center of rotation
* @z: Z axis center of rotation
*
* Sets the center of rotation. The coordinates are relative to the plane
* normal to the rotation axis set with clutter_behaviour_rotate_set_axis().
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_center (ClutterBehaviourRotate *rotate,
gint x,
gint y,
gint z)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
g_object_freeze_notify (G_OBJECT (rotate));
if (priv->center_x != x)
{
priv->center_x = x;
g_object_notify (G_OBJECT (rotate), "center-x");
}
if (priv->center_y != y)
{
priv->center_y = y;
g_object_notify (G_OBJECT (rotate), "center-y");
}
if (priv->center_z != z)
{
priv->center_z = z;
g_object_notify (G_OBJECT (rotate), "center-z");
}
g_object_thaw_notify (G_OBJECT (rotate));
}
/**
* clutter_behaviour_rotate_get_center:
* @rotate: a #ClutterBehaviourRotate
* @x: return location for the X center of rotation
* @y: return location for the Y center of rotation
* @z: return location for the Z center of rotation
*
* Retrieves the center of rotation set using
* clutter_behaviour_rotate_set_center().
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_get_center (ClutterBehaviourRotate *rotate,
gint *x,
gint *y,
gint *z)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (x)
*x = priv->center_x;
if (y)
*y = priv->center_y;
if (z)
*z = priv->center_z;
}
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