Ben;
Thanks for the suggestion. It looks like your change is already included in version 4.6.4.
John
-------------- Original message from "Weisburd, Ben" <benw_at_ll.mit.edu>: --------------
John,
I had a similar problem a while ago and hadto change a line inside BufferedLayer.projectionChanged(com.bbn.openmap.event.ProjectionEventpe).
The original was
mapBean.setProjection(proj);
I changed this to
mapBean.setProjection(proj == null? proj : proj.makeClone());
I think there is a threading issue where,if you trigger many projectionChanged events one after the other, mapBean will sometimesmutate the projection object before the BufferedLayer has processed theprevious projection event. I don’t remember exactly why this was aproblem, but it had something to do with the layer deciding that the newprojection was the same as the one it had before, and ignoring the projectionevent.
-Ben
PS. I’m attaching the changed file.
From:owner-openmap-users_at_bbn.com [mailto:owner-openmap-users_at_bbn.com] On Behalf Of john.kimball_at_att.net
Sent: Thursday, July 17, 2008 5:35PM
To: openmap-users_at_bbn.com
Subject: [OpenMap Users]BufferedLayer occasionally fails to repaint in version 4.6.4
I have an OpenMap-based application that uses a BufferedLayercontaining a GraticuleLayer and two ScaleFilterLayer instances, each containingShapeLayers, one with edges/boundaries and the other with filled areas ofpolitical regiions..
When zooming in and out the BufferedLayer occasionally (1 time in 10?) fails torepaint, and only the map background and our custom graphics are shown.
The application did not exhibit this behavior in version 4.6 with the samelayers and layer configuration.
Removing the component layers from the BufferedLayer and displaying themseparately solves the failure to repaint problem, but map update rates for ourgraphics are unacceptable.
Anyone have any suggestions?
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Received on Fri Jul 18 2008 - 13:33:46 EDT