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<H1><A NAME="SECTION002100000000000000000">
1.10 How AutoLayout flags are determined</A>
</H1>
When a container manages a view, it has to determine the align flags
of the view.  When the view is first added, the container calls the
method <TT>-autolayoutDefaultHorizontalAlignment</TT> of the view, to
get its horizontal align flag, and the method
<TT>-autolayoutDefaultVerticalAlignment</TT> to get its vertical align
flag.  If the values returned by those methods are not appropriate, it
is possible to change the flags by calling methods of the container
manually for each view (for example, for boxes, by calling the method
<TT>-setHorizontalAlignment:forView:</TT>).  Any flag manually set will
override the default flags.

<P>
Renaissance AutoLayout adds a category to NSView, implementing the
following methods:

<P>

<UL>
<LI><TT>- (GSAutoLayoutAlignment)
  autolayoutDefaultHorizontalAlignment</TT>, which should return the
  default alignment in the horizontal direction for that view (given
  the view's class and attributes).
</LI>
<LI><TT>- (GSAutoLayoutAlignment)
  autolayoutDefaultVerticalAlignment</TT>, which should return the default
  alignment in the vertical direction for that view (given the view's
  class and attributes).
</LI>
</UL>

<P>
The default implementation of those methods in <TT>NSView</TT> returns
<TT>GSAutoLayoutAlignCenter</TT> for both of them; Renaissance AutoLayout 
also provides implementations of those methods (as categories) for
most standard AppKit classes; generally returning
<TT>GSAutoLayoutExpand</TT> if the control benefits from being expanded 
in a direction, and <TT>GSAutoLayoutAlignCenter</TT> otherwise.

<P>
You should implement those methods in your subclasses to make sure
they interact properly with Renaissance AutoLayout.

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