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mutter-performance-source/clutter/clutter-behaviour-rotate.c
Neil Roberts 8d51617979 Conditionally use g_object_notify_by_pspec 
This adds a wrapper macro to clutter-private that will use
g_object_notify_by_pspec if it's compiled against a version of GLib
that is sufficiently new. Otherwise it will notify by the property
name as before by extracting the name from the pspec. The objects can
then store a static array of GParamSpecs and notify using those as
suggested in the documentation for g_object_notify_by_pspec.

Note that the name of the variable used for storing the array of
GParamSpecs is obj_props instead of properties as used in the
documentation because some places in Clutter uses 'properties' as the
name of a local variable.

Mose of the classes in Clutter have been converted using the script in
the bug report. Some classes have not been modified even though the
script picked them up as described here:

json-generator:

 We probably don't want to modify the internal copy of JSON

behaviour-depth:
rectangle:
score:
stage-manager:

 These aren't using the separate GParamSpec* variable style.

blur-effect:
win32/device-manager:

 Don't actually define any properties even though it has the enum.

box-layout:
flow-layout:

  Have some per-child properties that don't work automatically with
  the script.

clutter-model:

  The script gets confused with ClutterModelIter

stage:

  Script gets confused because PROP_USER_RESIZE doesn't match
  "user-resizable"

test-layout:

  Don't really want to modify the tests

http://bugzilla.clutter-project.org/show_bug.cgi?id=2150
2010-08-10 17:12:06 +01:00

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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,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
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",
P_("Angle Begin"),
P_("Initial angle"),
0.0, 360.0,
0.0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_ANGLE_START] = pspec;
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",
P_("Angle End"),
P_("Final angle"),
0.0, 360.0,
0.0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_ANGLE_END] = pspec;
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",
P_("Axis"),
P_("Axis of rotation"),
CLUTTER_TYPE_ROTATE_AXIS,
CLUTTER_Z_AXIS,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_AXIS] = pspec;
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",
P_("Direction"),
P_("Direction of rotation"),
CLUTTER_TYPE_ROTATE_DIRECTION,
CLUTTER_ROTATE_CW,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_DIRECTION] = pspec;
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",
P_("Center X"),
P_("X coordinate of the center of rotation"),
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_CENTER_X] = pspec;
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",
P_("Center Y"),
P_("Y coordinate of the center of rotation"),
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_CENTER_Y] = pspec;
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",
P_("Center Z"),
P_("Z coordinate of the center of rotation"),
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_CENTER_Z] = pspec;
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;
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_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;
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_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);
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_ANGLE_START]);
}
if (priv->angle_end != angle_end)
{
priv->angle_end = clamp_angle (angle_end);
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_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;
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_CENTER_X]);
}
if (priv->center_y != y)
{
priv->center_y = y;
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_CENTER_Y]);
}
if (priv->center_z != z)
{
priv->center_z = z;
_clutter_notify_by_pspec (G_OBJECT (rotate), obj_props[PROP_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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