Hi Don
Thanks for the help.. I think my problem was that I was creating my own omGraphicList and not adding the omGraphics to the main list.. (I think!).
After reading the docs a bit bit more I have done the following to display my omGraphics..
1. I created a list of omGraphics specific to my layer.
2. I add this list to the main list using the getlist method and then the add method.
3. When I want to modify my omGraphics I modify there parameters(lat lon for instance) and call the regenerate method using the projection returned from getProjection.
4. I then call repaint to display the modified omGraphic.
All this works fine,except for the code placing of these procedures...
In the documentation for OmGraphicHandlerLayer that I am extending, It suggests that I generate my list of omGraphics within the Generate method and return them. If I do this they do not appear on the map.. Any Ideas?
I generate my omGraphs in my init method instead and this works fine.
Apart from the above I have noticed a strange behaviour.. To test the speed of update of my new 4.6 version, I update my omGraphics lat lon continuously every 100 ms moving it around in a circle.. I have noticed that if I show the demo layer it causes a few missed positions being shown on the map. I would expect some performance degradation but I notice if I zoom out then the problem improves! I would have expected it to worsen as it has to draw more of the map?
Another performance problem I have noticed is when I try to display a CSVTiledImagePlugin layer referencing an image only 2.5MB. Basically I cant, it reports out of memory.
I have displayed at least 16MB images in 4.5.4 without any problem.
I know there are a few issues hear, but your help would be appreciated on these
Thanks for your time
Regards
Mark.
-----Original Message-----
From: Don Dietrick [mailto:dietrick_at_bbn.com]
Sent: 28 October 2004 17:34
To: Gatrell, Mark (UK)
Cc: Openmap-Users (E-mail)
Subject: Re: [OpenMap Users] Render Type Problem
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I'd check and make sure the coordinates are floats, and aren't getting
interpreted as integers.
- Don
On Oct 28, 2004, at 10:55 AM, Gatrell, Mark (UK) wrote:
>
> Hi All
> I am in the process of upgrading my existing application using
> OpenMap4.5.4 to a version using OpenMap4.6.
> My problem, is that if I create an OmText graphic and place it on the
> map, although I set the render type to latlon the graphic does not
> re-project to the correct location if I zoom in (for instance) , It
> stays at the same xy position on the screen.
>
> Any ideas what it is I'm doing wrong?
>
> Your help is appreciated.. Thanks
>
> Regards
>
> Mark.
>
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Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge, MA
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Received on Mon Nov 01 2004 - 07:13:33 EST