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[animation] Enhance the bind API

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Bug 1419 - Add clutter_animation_bind, rename clutter_animation_bind_interval

This is a different approach from the clutter_actor_animatev
vector variant.  The single call should be even easier on
automatic bindings, since calls can be chained like:

  new Clutter.Animation({object: myactor}).bind("x", 42).bind("y", 43);

Note clutter_animation_bind_property which took a ClutterInterval
is renamed to clutter_animation_bind_interval for clarity, and to
discourage use since there are friendlier APIs about.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Colin Walters 2009-03-05 23:10:00 -05:00 committed by Emmanuele Bassi
parent 156589fe3f
commit 0cb0a841cc
2 changed files with 104 additions and 32 deletions
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129
clutter/clutter-animation.c
View File

@ -426,34 +426,15 @@ clutter_animation_update_property_internal (ClutterAnimation *animation,
g_object_ref_sink (interval));
}
/**
* clutter_animation_bind_property:
* @animation: a #ClutterAnimation
* @property_name: the property to control
* @interval: a #ClutterInterval
*
* Binds @interval to the @property_name of the #GObject
* attached to @animation. The #ClutterAnimation will take
* ownership of the passed #ClutterInterval.
*
* If you need to update the interval instance use
* clutter_animation_update_property() instead.
*
* Since: 1.0
*/
void
clutter_animation_bind_property (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval)
static GParamSpec *
clutter_animation_validate_bind (ClutterAnimation *animation,
const char *property_name,
GType argtype)
{
ClutterAnimationPrivate *priv;
GObjectClass *klass;
GParamSpec *pspec;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (property_name != NULL);
g_return_if_fail (CLUTTER_IS_INTERVAL (interval));
priv = animation->priv;
if (G_UNLIKELY (!priv->object))
@ -462,7 +443,7 @@ clutter_animation_bind_property (ClutterAnimation *animation,
"object set. You need to call clutter_animation_set_object() "
"first to be able to bind a property",
property_name);
return;
return NULL;
}
if (G_UNLIKELY (clutter_animation_has_property (animation, property_name)))
@ -470,7 +451,7 @@ clutter_animation_bind_property (ClutterAnimation *animation,
g_warning ("Cannot bind property `%s': the animation already has "
"a bound property with the same name",
property_name);
return;
return NULL;
}
klass = G_OBJECT_GET_CLASS (priv->object);
@ -481,31 +462,119 @@ clutter_animation_bind_property (ClutterAnimation *animation,
"no such property",
property_name,
g_type_name (G_OBJECT_TYPE (priv->object)));
return;
return NULL;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("Cannot bind property `%s': the property is not writable",
property_name);
return;
return NULL;
}
if (!g_value_type_compatible (G_PARAM_SPEC_VALUE_TYPE (pspec),
clutter_interval_get_value_type (interval)))
argtype))
{
g_warning ("Cannot bind property `%s': the interval value of "
"type `%s' is not compatible with the property value "
"of type `%s'",
property_name,
g_type_name (clutter_interval_get_value_type (interval)),
g_type_name (argtype),
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
return;
return NULL;
}
return pspec;
}
/**
* clutter_animation_bind_interval:
* @animation: a #ClutterAnimation
* @property_name: the property to control
* @interval: (transfer full): a #ClutterInterval
*
* Binds @interval to the @property_name of the #GObject
* attached to @animation. The #ClutterAnimation will take
* ownership of the passed #ClutterInterval. For more information
* about animations, see clutter_actor_animate().
*
* If you need to update the interval instance use
* clutter_animation_update_property() instead.
*
* Return value: (transfer none): The animation itself.
* Since: 1.0
*/
ClutterAnimation *
clutter_animation_bind_interval (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval)
{
GParamSpec *pspec;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
g_return_val_if_fail (CLUTTER_IS_INTERVAL (interval), NULL);
pspec = clutter_animation_validate_bind (animation, property_name,
clutter_interval_get_value_type (interval));
if (pspec == NULL)
return NULL;
clutter_animation_bind_property_internal (animation, pspec, interval);
return animation;
}
/**
* clutter_animation_bind:
* @animation: a #ClutterAnimation
* @property_name: the property to control
* @final: The final value of the property
*
* Adds a single property with name @property_name to the
* animation @animation. For more information about animations,
* see clutter_actor_animate().
*
* This method returns the animation primarily to make chained
* calls convenient in language bindings.
*
* Return value: (transfer none): The animation itself.
* Since: 1.0
*/
ClutterAnimation *
clutter_animation_bind (ClutterAnimation *animation,
const gchar *property_name,
const GValue *final)
{
ClutterAnimationPrivate *priv;
GParamSpec *pspec;
ClutterInterval *interval;
GType type;
GValue initial = { 0, };
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
priv = animation->priv;
type = G_VALUE_TYPE (final);
pspec = clutter_animation_validate_bind (animation, property_name,
type);
if (pspec == NULL)
return NULL;
g_value_init (&initial, G_PARAM_SPEC_VALUE_TYPE (pspec));
g_object_get_property (priv->object, property_name, &initial);
interval = clutter_interval_new_with_values (type, &initial, final);
g_value_unset (&initial);
clutter_animation_bind_property_internal (animation, pspec, interval);
return animation;
}
/**
* clutter_animation_unbind_property:
* @animation: a #ClutterAnimation

7
clutter/clutter-animation.h
View File

@ -116,7 +116,10 @@ void clutter_animation_set_alpha (ClutterAnimation *an
ClutterAlpha *alpha);
ClutterAlpha * clutter_animation_get_alpha (ClutterAnimation *animation);
void clutter_animation_bind_property (ClutterAnimation *animation,
ClutterAnimation * clutter_animation_bind (ClutterAnimation *animation,
const gchar *property_name,
const GValue *final);
ClutterAnimation * clutter_animation_bind_interval (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval);
gboolean clutter_animation_has_property (ClutterAnimation *animation,
@ -124,7 +127,7 @@ gboolean clutter_animation_has_property (ClutterAnimation *an
void clutter_animation_update_property (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval);
void clutter_animation_unbind_property (ClutterAnimation *animation,
void clutter_animation_unbind (ClutterAnimation *animation,
const gchar *property_name);
ClutterInterval *clutter_animation_get_interval (ClutterAnimation *animation,
const gchar *property_name);