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constraint: Rename BindConstraint:bind-axis

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We're not binding an axis: we're really binding a coordinate of an actor
to the coordinate of another one.
This commit is contained in:
Emmanuele Bassi
2010-05-19 14:34:18 +01:00
parent f857457b9d
commit e9b93d5676
3 changed files with 139 additions and 39 deletions
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124
clutter/clutter-bind-constraint.c
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@ -1,3 +1,39 @@
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2010 Intel Corporation.
*
* 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/>.
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
*/
/**
* SECTION:ClutterBindConstraint
* @Title: ClutterBindConstraint
* @Short_Description: A constraint binding the position of an actor
*
* #ClutterBindConstraint is a #ClutterConstraint that binds the position of
* the #ClutterActor to which it is applied to the the position of another
* #ClutterActor.
*
* #ClutterBindConstraint is available since Clutter 1.4
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
@ -20,7 +56,7 @@ struct _ClutterBindConstraint
ClutterConstraint parent_instance;
ClutterActor *source;
ClutterBindAxis bind_axis;
ClutterBindCoordinate coordinate;
gfloat offset;
};
@ -34,7 +70,7 @@ enum
PROP_0,
PROP_SOURCE,
PROP_BIND_AXIS,
PROP_COORDINATE,
PROP_OFFSET
};
@ -59,17 +95,17 @@ update_actor_position (ClutterBindConstraint *bind)
source_position.y = clutter_actor_get_y (bind->source);
source_position.z = clutter_actor_get_depth (bind->source);
switch (bind->bind_axis)
switch (bind->coordinate)
{
case CLUTTER_BIND_X_AXIS:
case CLUTTER_BIND_X:
clutter_actor_set_x (actor, source_position.x + bind->offset);
break;
case CLUTTER_BIND_Y_AXIS:
case CLUTTER_BIND_Y:
clutter_actor_set_y (actor, source_position.y + bind->offset);
break;
case CLUTTER_BIND_Z_AXIS:
case CLUTTER_BIND_Z:
clutter_actor_set_depth (actor, source_position.z + bind->offset);
break;
}
@ -89,7 +125,7 @@ source_position_changed (GObject *gobject,
}
static void
source_destroyed (ClutterActor *actor,
source_destroyed (ClutterActor *actor,
ClutterBindConstraint *bind)
{
bind->source = NULL;
@ -125,17 +161,17 @@ _clutter_bind_constraint_set_source (ClutterBindConstraint *bind,
}
static void
_clutter_bind_constraint_set_bind_axis (ClutterBindConstraint *bind,
ClutterBindAxis axis)
_clutter_bind_constraint_set_coordinate (ClutterBindConstraint *bind,
ClutterBindCoordinate coord)
{
if (bind->bind_axis == axis)
if (bind->coordinate == coord)
return;
bind->bind_axis = axis;
bind->coordinate = coord;
update_actor_position (bind);
g_object_notify (G_OBJECT (bind), "bind-axis");
g_object_notify (G_OBJECT (bind), "coordinate");
}
static void
@ -166,8 +202,8 @@ clutter_bind_constraint_set_property (GObject *gobject,
_clutter_bind_constraint_set_source (bind, g_value_get_object (value));
break;
case PROP_BIND_AXIS:
_clutter_bind_constraint_set_bind_axis (bind, g_value_get_enum (value));
case PROP_COORDINATE:
_clutter_bind_constraint_set_coordinate (bind, g_value_get_enum (value));
break;
case PROP_OFFSET:
@ -194,8 +230,8 @@ clutter_bind_constraint_get_property (GObject *gobject,
g_value_set_object (value, bind->source);
break;
case PROP_BIND_AXIS:
g_value_set_enum (value, bind->bind_axis);
case PROP_COORDINATE:
g_value_set_enum (value, bind->coordinate);
break;
case PROP_OFFSET:
@ -217,6 +253,13 @@ clutter_bind_constraint_class_init (ClutterBindConstraintClass *klass)
gobject_class->set_property = clutter_bind_constraint_set_property;
gobject_class->get_property = clutter_bind_constraint_get_property;
/**
* ClutterBindConstraint:source:
*
* The #ClutterActor used as the source for the binding
*
* Since: 1.4
*/
pspec = g_param_spec_object ("source",
"Source",
"The source of the binding",
@ -225,15 +268,29 @@ clutter_bind_constraint_class_init (ClutterBindConstraintClass *klass)
G_PARAM_CONSTRUCT);
g_object_class_install_property (gobject_class, PROP_SOURCE, pspec);
pspec = g_param_spec_enum ("bind-axis",
"Bind Axis",
"The axis to bind the position from",
CLUTTER_TYPE_BIND_AXIS,
CLUTTER_BIND_X_AXIS,
/**
* ClutterBindConstraint:coordinate:
*
* The coordinate to be bound
*
* Since: 1.4
*/
pspec = g_param_spec_enum ("coordinate",
"Coordinate",
"The coordinate to bind",
CLUTTER_TYPE_BIND_COORDINATE,
CLUTTER_BIND_X,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT);
g_object_class_install_property (gobject_class, PROP_BIND_AXIS, pspec);
g_object_class_install_property (gobject_class, PROP_COORDINATE, pspec);
/**
* ClutterBindConstraint:offset:
*
* The offset, in pixels, to be applied to the binding
*
* Since: 1.4
*/
pspec = g_param_spec_float ("offset",
"Offset",
"The offset in pixels to apply to the binding",
@ -248,20 +305,33 @@ static void
clutter_bind_constraint_init (ClutterBindConstraint *self)
{
self->source = NULL;
self->bind_axis = CLUTTER_BIND_X_AXIS;
self->coordinate = CLUTTER_BIND_X;
self->offset = 0.0f;
}
/**
* clutter_bind_constraint_new:
* @source: the #ClutterActor to use as the source of the binding
* @coordinate: the coordinate to bind
* @offset: the offset to apply to the binding, in pixels
*
* Creates a new constraint, binding a #ClutterActor's position to
* the given @coordinate of the position of @source
*
* Return value: the newly created #ClutterBindConstraint
*
* Since: 1.4
*/
ClutterConstraint *
clutter_bind_constraint_new (ClutterActor *source,
ClutterBindAxis axis,
gfloat offset)
clutter_bind_constraint_new (ClutterActor *source,
ClutterBindCoordinate coordinate,
gfloat offset)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (source), NULL);
return g_object_new (CLUTTER_TYPE_BIND_CONSTRAINT,
"source", source,
"bind-axis", axis,
"coordinate", coordinate,
"offset", offset,
NULL);
}