[mapguide-users] text layer with Capital Letter

[Traian Stanev]

Yeah, that's mine. I didn't feel like implementing geometry operations
for expressions, and they aren't that useful for tooltips, labeling and
theming.
 
You can also use these expressions in the theme rules (which are
technically attribute filters and are evaluated by MapGuide).
 
You cannot use them to set a layer filter since that is evaluated by the
FDO provider.
 
But, you can simulate a layer filter that uses such expression by using
the expression as a theming rule that only turns on the features you
want.
 
MapGuide may not be the best place to do this, but right now the FDO
providers don't have the same capabilities in terms of expressions, so
evaluating them in MapGuide ensures consistent results across providers.
If it will make you feel better, the SDF provider uses the same, but
slightly older version for evaluating attribute filters and computed
identifiers. I think it may even support geometry :-).
 
 
Traian
 
 

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From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Jason Birch
Sent: Friday, February 02, 2007 12:29 AM
To: MapGuide Users Mail List
Subject: RE: [mapguide-users] text layer with Capital Letter


Hey :(
 
That wasn't any fun.  There's nothing terribly interesting in there
other than maybe the URLENCODE function and a funny comment I ran into:
 
//TODO: GEOMETRY! yay!
 
:)
 
DECAP really seems random; you must have needed it for something.
 
Where can these function be applied?  I'm guessing that there is no way
to apply them to the Properties dialog, so that leaves maptips and label
expressions?  Did I miss anything?

I'd love to see the other obvious case functions, an IIF() function, a
bunch of Regex stuff, more string handling (len, substr, etc).  Is
MapGuide the best place to do this?  These functions would be useful for
output, but quite a few would also be useful for creating attribute
filters in queries.

Jason
 
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