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Hi Karl,<br>
Every role has a similarly named method in the context class. This
method returns the object that shall be bound to the role. E.g.:<br>
<br>
¤ Shapes4ArrowsCtx >>Shape1<br>
¤ ^data anyShape<br>
<br>
The different shapes (and arrows) are found in a runtime dictionary
that that is filled when the context class is
instantiated:<br>
<br>
¤ Shapes4ArrowsCtx >>bindRolesToObjects<br>
¤ | messName |<br>
¤ self class roleNames<br>
¤ do: [:rNam | <br>
¤ messName := rNam asString asSymbol.<br>
¤ roleMap<br>
¤ at: messName<br>
¤ put: (self<br>
¤ perform: messName<br>
¤ ifNotUnderstood: [])].<br>
¤ ^ roleMap<br>
<br>
The idea is that a programmer need to understand this, but should not
need to understand the details of how it is done. (To see the details,
look at these methods:<br>
Shapes4Env>>startArrowAnimation<br>
Shapes4ArrowsCtx class>>executeInContext: <br>
Shapes4ArrowsCtx >>on:env:<br>
Shapes4ArrowsCtx >>bindRolesToObjects<br>
<br>
I hope it answers your question.<br>
<br>
The above is the current implementation. I believe there is much room
for simplification that should emerge when I write a tutorial. (Much
better to rewrite the code than to try its complexities). <br>
<br>
Chers<br>
--Trygve<br>
<br>
<br>
On 14.09.2008 16:25, Karl Ramberg wrote:
<blockquote cite="mid:48CD1EEA.5030008@gmail.com" type="cite">Trygve
Reenskaug wrote:
<br>
<blockquote type="cite">I just posted a new version of the BabyIDE
report and Squeak image.
<br>
I post an image rather then a Montizello loadable file because it is
just a demo.
<br>
I am working on a small application all done in BabyIDE.
<br>
I'll post a Monticello file (BabyIDE.alpha.0)as soon as this work is
completed.
<br>
</blockquote>
<br>
I looked at the IDE and tried to find out how the different shapes got
selected in a sequence, but I got lost.
<br>
Are the roles bound before the animation starts or how is it set up ?
<br>
<br>
Karl
<br>
<br>
<br>
</blockquote>
<br>
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<p class="MsoNormal" style=""><span class="SpellE"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Trygve</span></span><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">
Reenskaug<span style=""> </span>mailto: <span class="SpellE"><a class="moz-txt-link-abbreviated" href="mailto:trygver@ifi.uio.no">trygver@ifi.uio.no</a></span></span><span
style="font-size: 10pt; font-family: Arial;"><o:p></o:p></span></p>
<p class="MsoNormal" style=""><span class="SpellE"><span class="GramE"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Morgedalsvn</span></span></span><span
class="GramE"><span style="font-size: 10pt; font-family: Arial;"
lang="EN-GB">.</span></span><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> 5A <span
style=""> </span><a class="moz-txt-link-freetext" href="http://heim.ifi.uio.no/~trygver">http://heim.ifi.uio.no/~trygver</a><o:p></o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 10pt; font-family: Arial;">N-0378
Oslo<span style=""> </span>Tel: (+47) 22 49 57 27<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span class="SpellE"><span
style="font-size: 10pt; font-family: Arial;">Norway</span></span><span
style="font-size: 10pt; font-family: Arial;"><o:p></o:p></span></p>
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