[OpenLayers-Users] Layer.redraw() - strange behavior

[ridsch]

I further tested the behavior and it seems that the described behavior is
shown in firefox (3.5.5) and IE (8) only. In chrome and safari
layer.redraw() works perfectly.

??



ridsch wrote:
> 
> Hi list,
> 
> i extended the OpenLayers.Layer.OSM class to provide my own layer and
> overrid the getURL(bounds) function as I load the osm tiles from my own
> server.
> The strategy is as follows:
> When getURL is called on the browser an ajax request is called to my osm
> server and the necessary tiles are loaded and stored to the webserver.
> This
> works pretty well and I can see tiles lying around on my webserver. But of
> course this takes some time and is too late for openlayers to render this
> specific tile in the scope of the getURL method. So there are no tiles
> visible in the browser which is logical.
> I now tried to call layername.redraw() in firebug after all tiles where
> loaded. I see in firebug that all the necessary tiles are again requested
> within the getURL function. The URLs are alright and the tiles are at the
> right place. But again nothing is visible in the browser!
> But now comes the strange thing. When I copy one url string of a tile from
> the firebug console and open it in a new browser window, the tile (.png)
> is
> shown in the browser! And even more strange (at least for me) when I *now*
> call layername.redraw() this tile is shown in the map. But only this tile
> and not the others. When I open another tile in a new tab and call
> redraw()
> again two tiles are visible and so on.
> It seems that tiles are visible only when they are requested before.
> 
> Somebody has an idea?
> 
> _______________________________________________
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> Users at openlayers.org
> http://openlayers.org/mailman/listinfo/users
> 
> 

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