[mapguide-users] Viewer API Selection Timing Issues

[Scott Hameister]

RFC 15 should solve this problem in the AJAX viewer when/if it makes it
through

 

  _____  

From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Buscher, Shane
Sent: Thursday, March 15, 2007 10:02 AM
To: Mapguide_users at lists.osgeo.org
Subject: [mapguide-users] Viewer API Selection Timing Issues

 

I may be going about this the wrong way, but here's my problem.  I want to
select a feature based on an attribute query in the task pane, automatically
zoom to it, and highlight it.  I have found highlighting the feature to be
the most problematic because the feature has to exist within the map frame
extent before it can be selected with the SetSelectionXML() Viewer api
function. As far as I know, this is the only function call you can make in
MapGuide to highlight features.  

Knowing that SetSelectionXML() will only highlight features in the current
map extent, I preceded to zoom to the feature (ZoomToView) before calling
SetSelectionXML().  The problem is that the map can't zoom quick enough, and
so no features are highlighted:

ZoomToView(x, y, scale);   

SetSelectionXML(xmlSet);  //no features exist yet because of delay in
ZoomToView 

I don't have any problems when the feature already exists in my map extent.
Does anyone have a workaround or better method to accomplish this?  The only
hack can think of is to pause the execution of SetSelectionXML() until
ZoomoView is complete, but I'm not sure the best way to code this.  

Regards,

Shane

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/mapguide-users/attachments/20070315/fcd651d1/attachment.html