[Gwt-openlayers-users] Animating Layers, Variances in Browsers

[Hutchins, M. C. <Cha...@nr...>]

All,

 

I have a web app that animates time relevant layers by turning the
visibility on and off (layer.setIsVisible(true/false)) in sequential order;
this process works with varying results depending on the browser. Users with
Firefox (especially 4) see layers that "flash" between each timestamp
instead of a smooth transition to the next image, but server calls are only
made for the amount of images in the array (unless a zoom/pan event occurs).
Users with Internet Explorer and Safari see a smooth animation and the
server calls are the same as with Firefox (best results). The worst results
are Chrome users, where the animation is not only flashing but every single
visibility switch initiates a new server call, so that even if you only had
10 images in your timeline, a Chrome user would make a call each time it hit
the timestamp. 

 

Has anyone else had these experiences using GWT-OpenLayers in various
browsers? Is using setIsVisible the standard for creating an animation? What
about using opacity?

 

Thanks in advance!

Chad  

 

Chad Hutchins

Meteorologist

Naval Research Laboratory

Marine Meteorology Division

7 Grace Hopper Ave.

Monterey, CA 93943-5502