[fusion-users] Changing Session-based maps in Fusion

[Bill Ten Broeck]

The Session opens with a sitemap, which can have any coordinate system. 
The menuing  system allows the user to switch sitemaps, and that piece 
works well. The issue is when the user begins drilling down into the 
site, we create what they want to see programatically.

We are starting with basically an empty map definition, call it base 
(has a single layer for extents/coords purposes, but we clear that layer 
in runtime).  We dynamically create layers and inject them into a newly 
created runtime map.  We overwrite the current session map with the new map.
 
The issue is that the maps have different extents and coordinate systems 
(from the site map), so fusion gets confused - even after reloading the 
map.  We have worked around the problem by using loadMapGroup() and 
switching the map definition to the appropiate base, which loads all 
settings in fusion and then creating the map with all the layers and 
overwritting the now correct session map.
 
What we would like to avoid is having to load the map twice, once to 
establish the base settings and another once the dynamic map is created.

Paul Spencer wrote:
> Sounds like something could be done but I'm not sure I follow the 
> logic of what needs to be done.  Is it possible for you to elaborate a 
> little more?
>
> On 2009-08-24, at 6:10 AM, Bill Ten Broeck wrote:
>
>> Hello.
>>
>> We have an application that has a navigation tool that allows the 
>> user to select a site (each site has its own, pre-defined map), and 
>> then drill down into the site. The drilldown-map is basically an 
>> empty, arbitrary coordinate system template map, which we erase then 
>> add layers to depending on what they have selected. We have this 
>> working well, provided we start with, or expose the template map, and 
>> then create our session based map. (IE, it has to be the currently 
>> visible map). What we need to be able to do is go directly from the 
>> static map to the runtime map with no intermediate step of needlessly 
>> exposing the template, just to make it the current map.
>>
>> It seems like the approach we are looking for is to change the 
>> session map in fusion to a session map we have created server side 
>> but we aren’t quite sure how to approach this. Is this clear? And if 
>> so, would anyone be willing to sketch out an approach?
>>
>> Thanks in advance.
>>
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>
>
> __________________________________________
>
>    Paul Spencer
>    Chief Technology Officer
>    DM Solutions Group Inc
>    http://research.dmsolutions.ca/
>
>