On Wed, 2008-07-16 at 15:39 +0530, varun shrivastava wrote:
> hi
> I have some questions regarding realize virtual function
> 1). When is it called?
i. when an unrealized actor is parented to a realized actor
ii. before an actor is shown for the first time
iii. when clutter_actor_realize() is called on an actor and
CLUTTER_ACTOR_IS_REALIZED() on the actor evaluates to
FALSE.
> 2). Why do we need to chain it up to parent implementation?
you don't *need* to if you're subclassing ClutterActor: you can set the
CLUTTER_ACTOR_REALIZED flag yourself; you *need* to chain up if you are
subclassing another actor class and you want its ::realize virtual
function to be called.
> 3) if so how can i chain up to its parent
in which language?
in C, it's:
CLUTTER_ACTOR_CLASS (your_actor_parent_class)->realize (actor);
but you should already know this.
ciao,
Emmanuele.
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Emmanuele Bassi, OpenedHand Ltd.
Unit R, Homesdale Business Centre
216-218 Homesdale Rd., Bromley - BR12QZ
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