[udig-devel] Re: Maps and LayerViews across multiple WorkbenchWindows

[Jody Garnett]

Monika Wnuk wrote:
> I think I'm good in explaining things in a way that makes them sound much more 
> difficult than they are :-).
A good trick that.
> Actually, I don't want the maps to track the same area! 
That makes it much easier :-) Ignore the previous email about "Open 
with..." (that was for if you are defining new MapEditor types).
> We don't need any interaction between them such as joint panning or 
> zooming by now. With "using layers partly distinct" I simply tried to say that 
> there are some geoResources which will be used by all maps (e.g. administrative 
> boundaries) and some which will be used exclusively by any of the maps. E.g.: 
> Map 1 contains the "administrative boundaries" layer and the "sensor 
> observations" layer. Map 2 also contains the "administrative boundaries" layer 
> (but doesn't necessarily show the same area) and a "rivers" layer.
>   
That will be fine; several maps can draw the same GeoResource. It is a 
little bit of fun watching the events go
when editing (it can be startling when your "changes" in one map do not 
show up in the others until committed).

An idea for you to consider:
- based on your earlier description it sounds like you have specific 
activities planned for the different windows; you may want to define a 
perspective for each activity (as per the custom application tutorial).
- we could associate a perspective with a Map; and switch the 
perspective to match the Map when it is opened - but only if the idea is 
help for you.
>> Note an easy: an easy way to do what you want would be to have multiple 
>> workbench windows; and a single application
>>     
> So maybe I do not see the wood for the trees. I just want to have multiple maps 
> (being independent from each other) opened programmatically in multiple windows 
> in a single application. In addition, each window shall have an independent 
> LayersView. How is this manageable with the current uDig framework?
>   
We took off the menu option to "open a new workbench" due to lack of 
testing time; we can add it again if
your project is going to end up testing it for the community. You can 
try out the idea yourself now in Eclipse
(Windows
>> Interesting; you could also keep editors in sync by:
>> - arrange for them to have the same Viewport Model
>> - set up a "sync viewport" idea so that all open editors track the same 
>> navigation commands (not sure if you just want them to look at the same 
>> location & scale; or if you want them to track the same coordinate 
>> reference system?)
>>     
> However, this sounds interesting for the case that I would like to have the 
> maps in sync in the future. I think it would also be possible to use 
> ViewportListeners by the editors. The "sync viewport" solution would also be 
> good since we use WGS 84 throughout the application.
>   
I would prefer the "sync viewport" idea (we need a better name); since 
the line of communication is already needed to communicate between the 
MapEditor and the Search view.

Let's remember this idea for if/when we need it.
> Once again, thanks for your support!
> Moni
>   
No worries :-)
Jody