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actor: Add accessors for rotation angles

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Given that the rotation transformations are now affected by the pivot
point, the Actor class should provide an accessors pair only for the
angle of rotation on a given axis.

https://bugzilla.gnome.org/show_bug.cgi?id=677853
This commit is contained in:
Emmanuele Bassi 2012-07-06 11:23:50 +01:00
parent 1fd0f4b9a5
commit a758cf6d3d
3 changed files with 74 additions and 1 deletions
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66
clutter/clutter-actor.c
View File

@ -4229,7 +4229,24 @@ clutter_actor_set_rotation_angle_internal (ClutterActor *self,
clutter_actor_queue_redraw (self);
}
static inline void
/**
* clutter_actor_set_rotation_angle:
* @self: a #ClutterActor
* @axis: the axis to set the angle one
* @angle: the angle of rotation, in degrees
*
* Sets the @angle of rotation of a #ClutterActor on the given @axis.
*
* This function is a convenience for setting the rotation properties
* #ClutterActor:rotation-angle-x, #ClutterActor:rotation-angle-y,
* and #ClutterActor:rotation-angle-z.
*
* The center of rotation is established by the #ClutterActor:pivot-point
* property.
*
* Since: 1.12
*/
void
clutter_actor_set_rotation_angle (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle)
@ -4238,6 +4255,8 @@ clutter_actor_set_rotation_angle (ClutterActor *self,
const double *cur_angle_p = NULL;
GParamSpec *pspec = NULL;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
info = _clutter_actor_get_transform_info_or_defaults (self);
switch (axis)
@ -4269,6 +4288,51 @@ clutter_actor_set_rotation_angle (ClutterActor *self,
clutter_actor_queue_redraw (self);
}
/**
* clutter_actor_get_rotation_angle:
* @self: a #ClutterActor
* @axis: the axis of the rotation
*
* Retrieves the angle of rotation set by clutter_actor_set_rotation_angle().
*
* Return value: the angle of rotation, in degrees
*
* Since: 1.12
*/
gdouble
clutter_actor_get_rotation_angle (ClutterActor *self,
ClutterRotateAxis axis)
{
const ClutterTransformInfo *info;
gdouble retval;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.0);
info = _clutter_actor_get_transform_info_or_defaults (self);
switch (axis)
{
case CLUTTER_X_AXIS:
retval = info->rx_angle;
break;
case CLUTTER_Y_AXIS:
retval = info->ry_angle;
break;
case CLUTTER_Z_AXIS:
retval = info->rz_angle;
break;
default:
g_warn_if_reached ();
retval = 0.0;
break;
}
return retval;
}
/*< private >
* clutter_actor_set_rotation_center_internal:
* @self: a #ClutterActor

7
clutter/clutter-actor.h
View File

@ -633,6 +633,13 @@ CLUTTER_AVAILABLE_IN_1_12
void clutter_actor_get_pivot_point (ClutterActor *self,
gfloat *pivot_x,
gfloat *pivot_y);
CLUTTER_AVAILABLE_IN_1_12
void clutter_actor_set_rotation_angle (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle);
CLUTTER_AVAILABLE_IN_1_12
gdouble clutter_actor_get_rotation_angle (ClutterActor *self,
ClutterRotateAxis axis);
void clutter_actor_set_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle,

2
clutter/clutter.symbols
View File

@ -138,6 +138,7 @@ clutter_actor_get_preferred_width
clutter_actor_get_previous_sibling
clutter_actor_get_reactive
clutter_actor_get_request_mode
clutter_actor_get_rotation_angle
clutter_actor_get_rotation
clutter_actor_get_scale
clutter_actor_get_scale_center
@ -257,6 +258,7 @@ clutter_actor_set_pivot_point
clutter_actor_set_position
clutter_actor_set_reactive
clutter_actor_set_request_mode
clutter_actor_set_rotation_angle
clutter_actor_set_rotation
clutter_actor_set_scale
clutter_actor_set_scale_full