Okay... just wanted to think out loud before I actually gave a shot _at_ trying
this. I notice that the conversion process in postgis (converting the bytes
to geometries) takes QUITE a bit of time. I think time could be saved by
only removing the graphics that are "dirty" so to speak and only add the new
graphics based on what is not currently being shown.
This would be great for:
- small movements.. panning along and so on
This gets complicated though when you start talking about zooming... because
unless the graphics can be nicely resized and repositioned... they're just
as good as dirty.
So the question is do you think that a heuristic based repaint (based on
projection changes) will be in turn faster than a whole graphic repaint each
time?
Don Dietrick-2 wrote:
>
> Hi JayDub,
>
> Try using a ListResetProjectionChangePolicy. What's happening is that
> the old list is still being held by your layer while it's talking to
> the database, and if the map gets painted for another layer, your
> layer renders what it has. The LRPCP will clear out the list right
> away, since you'll be replacing the list later.
>
> Hope this helps,
>
> -- Don
>
> On Sep 3, 2009, at 9:28 PM, JayDub <justcallmejay_at_gmail.com> wrote:
>
>>
>> Hi guys.. I'm trying to optimize the postgis layer that I was shown
>> to me a
>> little earlier. There seems to be some repaint problems. When all
>> other
>> layers are repainted on the map (after a pan or zoom), the postgis
>> layer
>> disappears, then re-appears in the old position, then appears in the
>> right
>> place.
>>
>> I'm not sure where to start looking. RenderPolicy perhaps? Any
>> suggestions
>> will be welcomed.
>> --
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>> Sent from the OpenMap mailing list archive at Nabble.com.
>>
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Received on Wed Sep 09 2009 - 20:05:08 EDT