[OpenLayers-Users] transitionEffect for WFS layer possible?

[Kris Geusebroek]

Hi,

Succesfully used the nightly build with BBOX strategy and WFS protocol
to refresh my layer without blinking.
This gives me a very good user experience.

Had to make a minor chage to the code though:

In Strategy.BBOX update method the options.force is checked.
This didn't work the way I expected (namely creating the strategie with
new OpenLayers.Strategy.BBOX({force: true}) had no effect)
Seems that in Strategy.js the options are extended to with
OpenLayers.Util.extend(this, options) so this leaves us with a
this.force parameter but not options.force I guess.

I changed the update method in Strategy.BBOX but alternative could be
the way options are extended I guess.

Cheers Kris

-----Original Message-----
From: Christopher Schmidt [mailto:crschmidt at metacarta.com] 
Sent: Friday, March 27, 2009 11:12 PM
To: Andreas Hocevar
Cc: Kris Geusebroek; users at openlayers.org
Subject: Re: [OpenLayers-Users] transitionEffect for WFS layer possible?

On Fri, Mar 27, 2009 at 09:59:02PM +0100, Andreas Hocevar wrote:
> Hi,
> 
> 2009/3/27 Kris Geusebroek <kgeusebroek at xebia.com>:
> > I had a WMS layer with a transitionEffect = resize which gave a good
user
> > experience since the layer is refreshed in a certain timelimit.
> >
> > Now I have changed this to a WFS layer (because I need to add
functionality
> > to a feature like a popup onHover)
> >
> > But now the refreshing is causing a blinking effect.
> > Is it possible to have the transitionEffect on a WFS layer (in IE)
in any
> > way?
> 
> Not as transitionEffect option. What you could do, however, would be
> to create your WFS layer twice, but display only one at a time. Your
> workflow would be something like:
> 
>  * layer1 on, layer2 off
>  * turn layer 2 on, refresh layer 2, wait a sec or so, turn layer 1
off
>  * layer1 off, layer2 on
>  * turn layer 1 on, refresh layer 1, wait a sec or so, turn layer 2
off

Alternatively, use trunk with WFS and the BBOX protocol, which doesn't
get rid of the old features until the new ones are loaded, right?

Regards,
-- 
Christopher Schmidt
MetaCarta