Hi Tore,
It sounds like what is happening is one of the layers is responding to
the projection change very quickly and calling for a repaint before
another layer has a chance to update itself for the projection change.
I'm assuming that one layer is drawing things in the new projection
and another is drawing things for a moment in the old projection.
If the layer drawing things in the old projection is using the
StandardProjectionChangePolicy, that might make the effect more
pronounced. The StandardPCPolicy reuses the same OMGraphicList and
just calls generate() on it with the new projection. If the layer is
stilll working on updating the list with new OMGraphics when that
first repaint gets called by the other layer, the old OMGraphics get
rendered.
Switching to a ListResetPCPolicy clears the layer's list as soon as it
receives a projection change notification, so the layer won't draw
anything if the map gets painted while it is working. You'll want to
make sure that the layer is creating a new OMGraphicList object to
return from the prepare() method when doing this (good practice
anyway).
Have you tried the new OMMouseMode? It's a combination of the
SelectMouseMode and PanningMouseMode.
Hope this helps,
Don
On Wed, Oct 27, 2010 at 9:00 AM, Tore Halset <halset_at_pvv.ntnu.no> wrote:
> Hello.
>
> I am currently using a the normal MapBean in an swing application. It has some shape layers set as background and a overlay with the application specific polygons. On a mac, panning is nice. On windows, the map jumps back and forth after the panning. This flickering does not take long time, but it does not look nice.
>
> Changing PanMouseMode to use GraphicsConfiguration#createCompatibleImage to create the image buffers improved the situation slightly. Or nothing at all.
>
> Switching from MapBean to BufferedMapBean got the situation worse.
>
> Is there any other thing to try out to improve the panning in my app? This is all on openmap svn trunk.
>
> - Tore.
>
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Received on Wed Oct 27 2010 - 09:57:04 EDT