Hi Emmanuele,
Thanks for the prompt response, your absolutely right, the
Threads.Enter() call should be at the start of AddRect(), however I
still get the same errors when I do call it there. It seems that
creating an idle handler is the preferred method, I shall try and get
the same example working with that and go from there.
Kind Regards
Dan Higham
On Thu, Dec 11, 2008 at 4:24 PM, Emmanuele Bassi <[EMAIL PROTECTED]> wrote:
> On Thu, 2008-12-11 at 15:56 +0000, Dan Higham wrote:
>> Hello All,
>>
>> I am having some trouble getting my head round clutter threads. I seem
>> to keep running in to the same problems when adding actors from a new
>> thread. Please see my code below;
>
> you *must* *not* call Clutter API from a thread that did not start the
> main loop without acquiring the main thread lock; hence, this code:
>
>> private bool addRect (int x, int y){
>> Rectangle rect = new Rectangle(new Clutter.Color
>> (0xff, 0x00, 0x00, 0xff));
>> rect.SetPosition(x,y);
>> rect.SetSize(50,50);
>> Clutter.Threads.Enter();
>> Clutter.Stage.Default.AddActor(rect);
>> Clutter.Threads.Leave();
>> return true;
>> }
>>
>
> is completely wrong. the Threads.Enter() call should be done at the
> beginning of the function.
>
> in practice, though, there is also to factor in the interactions between
> threads, GObject, Clutter and Mono threads, which might render the whole
> point moot and prevent you from instantiating GObject classes from
> another thread than the main thread.
>
> to be safe and portable on different platforms, you should install an
> idle handler inside your thread once you've performed the blocking call
> and add the rectangle from the callback of the idle handler; this way
> you'll be guaranteed to operate in the main thread.
>
> ciao,
> Emmanuele.
>
> --
> Emmanuele Bassi, Intel Open Source Technology Center
>
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> To unsubscribe send a mail to [EMAIL PROTECTED]
>
>
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Dan Higham
Ruby Developer / Linux User
web: http://iamhigham.com
skype: danhigham
mail: [EMAIL PROTECTED]
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