[mapguide-users] Fusion map insists on refreshing map on selection, and clear selection...

[Kenneth Skovhede, GEOGRAF A/S]

Actually, in MapGuide OS 1.2.0 the selection is a part of the image.
So any selection/de-selection will require the map to be redrawn completely.
In MGOS 2.0.0 there was an optimization that enables an application to 
retrieve the selection as a transparent PNG.
While the transition effects in OL 2.6 will visually minimize the 
flickering, I would say that supporting the selection as a separate 
image would be of great use in fusion.
This is especially true when the underlying layer contains complex rasters.

I have emulated the seperate layer for MGOS 1.2.0 by keeping a dummy 
copy of the map where I turn on all the layers, select, and turn all 
layers off.
The dummy map has transparent background, and thus renders as just the 
selection.

Regards, Kenneth Skovhede, GEOGRAF A/S



Berdel, Brian skrev:
>
> Here is a recent post on this.
>
>  
>
> ------------------------------------------------
>
>  
>
> v1.1 of Fusion will incorporate v2.6 of OpenLayers which should 
> eliminate this problem and also gives us smooth transition effects for 
> zoom and panning.  This has already been added to the trunk version of 
> fusion.
>
> Mike
>
>
> -----Original Message-----
> From: foolfish <xjimmyshcn at sohu.com>
> Sent: Wednesday, June 4, 2008 11:53pm
> To: mapguide-users at lists.osgeo.org
> Subject: [mapguide-users] map flicker when refresh!!!
>
>
> when i use traditional method(not use fusion),when i show or hide a 
> layer,it
> won't flickering?
>
> but,in fusion,i use Legend Panel (Layer Manager) to show or hide a 
> layer,but
> the map is flickering obviously,it's not well~
>
> does anybody know how to solve the problem? wait for your help,thanks~
>
>
> -- 
> View this message in context: 
> http://www.nabble.com/map-flicker-when-refresh%21%21%21-tp17661479p17661479.html
>
>  
>
> Brian
>
> ------------------------------------------------------------------------
>
> *From:* mapguide-users-bounces at lists.osgeo.org 
> [mailto:mapguide-users-bounces at lists.osgeo.org] *On Behalf Of *Andrew 
> DeMerchant
> *Sent:* Monday, June 09, 2008 3:29 PM
> *To:* MapGuide Users Mail List
> *Subject:* [mapguide-users] Fusion map insists on refreshing map on 
> selection,and clear selection...
>
>  
>
> Just wondering if there's a way to stop fusion maps from redrawing the 
> map everytime a user selects / deselects something? This doesn't 
> happen using the AJAX browser...does this happen for anyone else?
>
> Andrew
>
>  
>
> 	
>
> *Andrew DeMerchant*
> *Computer Technologist*
> ph.1-877-2GEMTEC x.163
> fax 506-453-9470
>
> /GEMTEC Limited <http://www.gemtec.ca>
> /191 Doak Road
> Fredericton, NB, Canada
> E3C 2E6
>
>  
>
> ------------------------------------------------------------------------
>
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>   
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