To be more accurate the badness seems to occur when I am invoking
"World doOneCycle" from the Seaside canvas.
World doOneCycle is necessary in some situation to get Moprh in their
expected shape, because of the buggy Morph layout engine.
So, in a Seaside component, It results in uggly code like:
exercisePng
| view |
"Layout is buggy XXX"
^ exercisePng ifNil: [view := step exerciseView.
view openInWorld.
view extent: 6...@600.
World doOneCycle.
view extent: view extent + (1 @ 0).
view delete.
exercisePng := self pngImage: view imageForm]
Don't know if there are better code to handle that.
2009/2/25 Hilaire Fernandes <[email protected]>:
> Okay, thanks for the tip. Indeed this cascade of events occurs within
> Seaside, which, if I understand correctly, run in its own thread.
> The only things I am doing from this thread is to display a Morph. How
> could I do that so the bang does not show up?
>
> Hilaire
>
>
> 2009/2/25 GARY CHAMBERS <[email protected]>:
>> There are a number of entries in Mantis for Squeak about this.
>> My feeling is that more than one preocess is running the world loop such
>> that one starts doing the loop, another starts before the first is finished
>> and ends (setting to nil) then the first encounters this.
>> The world loop is not thread safe.
>>
>>
>> ________________________________
>> From: Hilaire Fernandes <[email protected]>
>> To: Pharo Development <[email protected]>
>> Sent: Wednesday, 25 February, 2009 12:04:24 PM
>> Subject: [Pharo-project] MessageNotUnderstood: UndefinedObject>>includes:
>>
>> I have this kind of error which appear randomly when I am
>> instantiating and displaying in real world a Morph.
>> Next from the morph is deduced Form field to use as the basis of a PNG
>> image for Seaside canvas.
>> It is easy to fix (or a least prevent the error) but it is system
>> land... so I am curious to read if other meet this problem.
>>
>> See debuglog
>> --
>> http://blog.ofset.org/hilaire
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [email protected]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>
>
>
> --
> http://blog.ofset.org/hilaire
>
--
http://blog.ofset.org/hilaire
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