Dear David,
 
It's *EXACTLY* what i needed.
Thank you very much !
 
By the way, anyone got an idea why if the line "Transcript show: (pos asString);cr." is commented out or the Transcript Window is closed, i don't get the animation but only the final state of the animation ? (see code belows).
 
Thank you !
 
|m1 m2|
m1:=Morph new.
m1 extent:800@600.
m1 color:Color blue.
m1 center: Display center.
m1 openInWorld.
m1 clipSubmorphs:true.
m2:=Morph new.
m2 extent:200@200.
m2 color:Color red.
m1 addMorph: m2.
m2 center: m1 center.
1 to:200 do:[:el|
|pos|
(Duration seconds:0.01) asDelay wait.
pos:=(m2 position x -5)@(m2 position y).
((pos x + m2 width) >= (m1 position x)) ifFalse:[
pos:=((m1 position x + m1 width)@ m2 position y).
].
"Transcript show: (pos asString);cr."
 m2 position:pos.
].

2012/7/19 <beginners-request@lists.squeakfoundation.org>
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Today's Topics:

   1. Re: Morphic - how to make a submorph not visible outside  his
      owner ? (David Corking)
   2. Re: Morphic - how to make a submorph not visible outside  his
      owner ? (David Corking)


----------------------------------------------------------------------

Message: 1
Date: Wed, 18 Jul 2012 15:02:25 +0100
From: David Corking <lists@dcorking.com>
Subject: Re: [Newbies] Morphic - how to make a submorph not visible
        outside his owner ?
To: "A friendly place to get answers to even the most basic questions
        about   Squeak." <beginners@lists.squeakfoundation.org>
Message-ID:
        <CAG+Z5Jc8rM_7-toVpRYmhjG2cfXfR10+ivitvFHkm4U4SKbwkQ@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Patrick, Is clipSubmorphs what you want?

David


------------------------------

Message: 2
Date: Wed, 18 Jul 2012 16:23:07 +0100
From: David Corking <lists@dcorking.com>
Subject: Re: [Newbies] Morphic - how to make a submorph not visible
        outside his owner ?
To: "A friendly place to get answers to even the most basic questions
        about   Squeak." <beginners@lists.squeakfoundation.org>
Message-ID:
        <CAG+Z5JcYzXFMzeJnQhd63m4RF+=k9uz_V2SMfL=hUVsq5FX50g@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I should be more specific. Try

m1 clipSubmorphs: true.

Hope that helps. David

p.s. I think your do loop pre-empts the Morphic UI loop.
Have you read John Maloney's tutorial on the step method?
http://stephane.ducasse.free.fr/FreeBooks/CollectiveNBlueBook/morphic.final.pdf
In the meantime, you could switch your Transcript hack for this hack :)
  m1 refreshWorld.


------------------------------

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