[OpenLayers-Users] do tile layers load all tiles for a given zoom layer all at once?

[Joseph Miller]

Hey All,
I am doing a deep dive into the openlayers code in an attempt to further 
understand how tile loading is implemented in order to fix some issues I 
am having with a custom implementation.  One thing that I am having 
trouble figuring out is whether all of the tiles are loaded for each zoom 
level right away when the zoom happens of if there is a way to get 
OpenLayers to only load the visible portion of the tiles plus a buffer 
(with further loading being triggered when the user pans into the buffer). 
 From what I can tell tile loading (addTile) is only called by 
initGriddedTiles, and only when the forceReTile boolean is triggered by a 
zoom or by a pan that goes completely outside of the layer boundaries?

Thanks,
Joe Miller
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20091228/7177a633/attachment.html