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Re: [udig-devel] ActiveMapTracker and Visible Maps
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A good point emily.
I think we need to add a persective changed listener and reset all the
maps on a perspective change. For example. When a perspective
changes the list of active maps should be cleared and re-created from
all the active parts. Probably with the editor as the highest
priority (IE the last one put on the stack).
Another possiblity it to have a separate tracker per perspective...
Yeah that is probably best so that the active maps order is better
preserved when there are multiple perspective switches taking place,
which does happen on a extension that I am currently working on.
Jesse
On 31-Oct-08, at 9:32 PM, Emily Gouge wrote:
I've come across a problem with the ActiveMapTracker that I'm
looking for input on how to fix it.
I have an application where the perspective includes a MapPart. As
a result when I start the application the map is shown by default.
However when I set the viewport bounds on the map, I see nothing. I
tracked this down to the render manager only refreshing the map if
the map is the current map:
if (ApplicationGIS.getActiveMap() != null &&
ApplicationGIS
.getVisibleMaps().contains(ApplicationGIS.getActiveMap())){
//refresh map
}
Somehow at this state the visible maps list is empty and the active
map is a non-existent map; so the map is not being drawn.
I tracked this down to the ActiveMapTracker (which is tracking the
visible maps and active maps). Normally when I create a new view
and it becomes visible the partVisible code is run which updates the
visible maps list. However it seems because this view is part of a
perspective being opened by default this code is not being run.
(The view is added to the perspective using a perspectiveExtension
extension point)
A little more hacking and I've found that if I change the partOpened
function to not only add the currentPart to the openMaps list, but
also the activeParts and visibleMaps list then my program draws the
map correctly.
I suspect this hack is bad and has other unknown implications; so
I'd like to know how I "properly" fix this issue.
Thanks,
Emily
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User-friendly Desktop Internet GIS (uDig)
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