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actor: Use GParamSpecUint for :opacity

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The :opacity property is defined using a GParamSpecUchar. This usually
leads to issues with language bindings that don't have an 'unsigned
char' type and that need to explicitly handle the conversion between
G_TYPE_UCHAR and G_TYPE_INT or G_TYPE_UINT.

The property definition already specifies an interval size of [0, 255]
on the values; more importantly, GObject already implicitly transforms
between G_TYPE_UCHAR and G_TYPE_UINT (the GValue transformation
functions are registered at type system initialization time) so
switching between a GParamSpecUchar and a GParamSpecUint should not be
an ABI break.

I have tested a simple program using the opacity property before and
after the change and I cannot see any run-time warnings related to this
issue.
This commit is contained in:
Emmanuele Bassi 2010-01-21 17:41:10 +00:00
parent d0f7debfba
commit 8fc07c51a9
1 changed files with 9 additions and 9 deletions
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18
clutter/clutter-actor.c
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@ -2581,7 +2581,7 @@ clutter_actor_set_property (GObject *object,
break;
case PROP_OPACITY:
clutter_actor_set_opacity (actor, g_value_get_uchar (value));
clutter_actor_set_opacity (actor, g_value_get_uint (value));
break;
case PROP_NAME:
@ -2864,7 +2864,7 @@ clutter_actor_get_property (GObject *object,
break;
case PROP_OPACITY:
g_value_set_uchar (value, priv->opacity);
g_value_set_uint (value, priv->opacity);
break;
case PROP_NAME:
@ -3462,15 +3462,15 @@ clutter_actor_class_init (ClutterActorClass *klass)
/**
* ClutterActor:opacity:
*
* Opacity of the actor, between 0 (fully transparent) and
* Opacity of an actor, between 0 (fully transparent) and
* 255 (fully opaque)
*/
pspec = g_param_spec_uchar ("opacity",
"Opacity",
"Opacity of actor",
0, 255,
255,
CLUTTER_PARAM_READWRITE);
pspec = g_param_spec_uint ("opacity",
"Opacity",
"Opacity of an actor",
0, 255,
255,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_OPACITY, pspec);
/**