[OpenLayers-Dev] Google layer and div resize: wrong config or bug?

Tim Schaub tschaub at openplans.org
Wed Feb 6 13:56:57 EST 2008

Pierre GIRAUD wrote:
> I think this is just a OL with ExtJS issue. The fact is that there a
> strange behavior even if there is no google layer.
> You can easily test a simple thing. With a single layer in your map,
> you can try to pan the map just after resizing an ExtJS region. You'll
> see that the map behavior is weird. The map moves more than expected.
> In MapFish we combine ExtJS and OL, and we often use layouts.
> To prevent the issue you expose here, we created a widget that simply
> calls map.updateSize() and this seems to go pretty well.

Yeah, same.  If you've got an Ext component that contains your map (a 
panel lets say), then configure it with a listener for "bodyresize". 
Or, if your panel is called panel, call

     "bodyresize": function() {

With your own scope/names etc.


> Though, I'm not sure that the bug Christopher quoted is related to
> your problem also.
> Regards,
> Pierre
> On Feb 5, 2008 9:44 PM, Diego Guidi <diegoguidi at gmail.com> wrote:
>> Sorry for the cryptic post, I try to explain my problem and tomorrow I
>> could send a sample code.
>> I have a "terrible" bug and i need to know if it's due to my mistake
>> or to a openlayers bug...
>> I'm creating a website (using openlayers, of course!) that publish WMS
>> data (from MapServer, but I'm using OpenLayers WMS layer).
>> This data is published over Google layers: I've prepared three layers
>> for satellite, maps, and hybrid google data.
>> So when i use my website, the layerswitcher control shows three map
>> data (from google) and a bunch of overlays.
>> All works well (sorry, all works GREAT!), except...
>> I'm using also ExtJS for create a flexible layout (something like
>> this: http://extjs.com/deploy/dev/examples/feed-viewer/view.html),
>> with a center div for openlayers and a right panel for additional
>> data: the panel size is modifiable with a splitter... and here are the
>> problems :(
>> When i resize the splitter (and, i suppose, the center div size
>> changes) the visible layers (one from google, and my data from WMS)
>> are sized correctly, but when i try to show another basemap from
>> google all the images are moved; looks like the tiles from google are
>> in a wrong position, moved in the upper-left corner from a size that
>> is not comparable to splitter move (i.e: if i move the splitter for 10
>> pixels or 200 pixels, the layer movement looks the same).
>> This problem is with IE7 and Firefox 2.0 (the only browser that I've tested).
>> I think that the problem is not well explained, so tomorrow i could
>> try to publish my website so anyone could see the problem abd look at
>> the source code.
>> Anyway, anyone has experienced my problem? Maybe should I simply call
>> map.updateSize()?
>> Thanks for any kind of support :)
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