[Cuis-dev] LayoutAdjustingMorph Class Comment [Now included in LayoutProposal repo]

[ken.dickey at whidbey.com]

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When added to the submorphs of a LayoutMorph,
I am a way of directly adjusting layout width or height.

I take care of the user interactions and delegate the actual changes to 
my containing LayoutMorph.
See LayoutAdjustingMorph>>adjustOwnerAt:

The way adjustments are made differs between fixed and proportional 
Morphs.

If I am between two proportional Morphs, the relative Morph proportions 
on both sides of me are adjusted.

If the user is moving me between a fixed and a proportional morph, the 
fixed size is adjusted.

The general effect is that if between 2 proportional Morphs, the 
proportions are adjusted and the
user sees the boundary between two morphs change.  If one Morph is 
fixed, then the user sees
the proportional Morphs ALL adjust.  An "accordian like" effect.  This 
is NOT due to a change
in relative proportions but just the proportional expansion or squeezing 
of the proportional
Morphs themselves.

E.g. note LayoutMorph class>>example11 which has a fixed Morph at each 
end.
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