[udig-devel] in memory layers, dynamic layers, table view, etc.

[Vince Darley <vince.darley@xxxxxxxxxxxx>]

We've been developing in small ways with uDig in the past several 
months, but have recently put more effort in moving some older 
software across to use uDig as our primary platform for routing-style software.

As part of this we've written a variety of dynamic layers which are 
added to uDig's "Catalog" and can be dropped onto any map.  These 
layers listen to our routing solution views and update nicely to 
display the current solution.  This all works more or less ok at present.

However, we've run into a few issues:

1) Some of our layers would like to have more than one Geometry, with 
the user in some way able to select which geometry they'd like to 
view and/or configure their style differently.  For example a layer 
might contain details on both journeys that are made (LineString) and 
the points that are reached (Point) and might wish to colour each 
differently.  Of course we could split this into two layers, but then 
many of the attributes would be duplicated.

Is it possible/sensible for a layer to have more than one Geometry?

2) The Table View shows our data, which is nice, but doesn't seem to 
support any sorting, column-rearrangement, or filtering.  For example 
we'd like the user to be able to arrange the columns in the order 
they wish, and omit some columns, and sort them up or down by simple 
clicking on column headings.

Is any of this possible (at present or in future, or can you point us 
to the right way to dive in to this)?

3) Our current layers are 'dynamic' in the sense that they can be 
updated from time to time, but nothing more than that.

What support is there for genuinely animated layers (e.g. a truck 
moving around on the map)?

thanks for any pointers!  It will be a great relief when we can throw 
away a bunch of horrible old code and stick with uDig 100%...

Vince.