[mapguide-users] Interaction between multiple Viewer Instances

[Kenneth Skovhede, GEOGRAF A/S]

Hi Ralf, and welcome :).

There is a slight obstacle in interacting between two sessions.

When MapGuide starts a new sessions, it converts the map from xml format 
to binary (from a MapDefinition to a RuntimeMap).
Part of this process is assigning each layer a globally unique id (GUID).
A selection is basically an xml like this:
<selection>
    <layer id="..guid..">
       <schema id="..classname..">
             <ID>...primary key in base 64 encoded format...</ID>
       </schema>
    </layer>
</selection>

The problem with having to sessions, is that the guid for the layers 
will now be different, but everything else is the same.
So, if you want to transfer the selection, you have to lookup the name 
of the layer, based on the guid, and then do the opposite on the other end.

Does this explain your question?

Regards, Kenneth Skovhede, GEOGRAF A/S



Ralf Comouth skrev:
> I am new to the mapguide user community so first of all I want to say "Hi"
> to everyone !
>
> I work on a project with MapGuide Open Source 2.0 with PostgreSQL (PostGIS)
> .
> Everything works fine so far but I have a problem.
>
> We use the Mapserver in two different ways :
>
> First in the "traditional" carthographic way. 
> Second as a tool to visualizes chart graphics.
>
> The idea is to use the selection in the chart to zoom to the real map.
> Now my problem is the "interaction" between these two instances of the
> Mapserver.
>
> I was wondering if any1 did this kind of stuff before or even get an idea if
> it is 
> possible at all (due to the different Session IDs).
>
> I would appreciate any comment or hint.
>
>
> Regards
>
> Ralf Comouth
>
>
> P.S.: I'm no native English speaker, so sorry for my English :-)
>
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