[OpenLayers-Users] Dealing with dead layers

[Lance Dyas]

<creativity mode on>
an advanced layerSwitcher could be informed of a bad layer ;-)
 have it listen for those ImageLoadError events and have dim the
layer or make its text red or similar
</creativity mode off>

Erik Uzureau wrote:
> I think Jeff brings up a good point. We should probably add this to the FAQ
> and or look into adding a better feedback mechanism to notify the
> user. The pink
> tile is fine and good for developers, but on a live site, it really
> isn't the best
> answer.
>
> e
>
> On 10/18/07, Christopher Schmidt <crschmidt at metacarta.com> wrote:
>   
>> On Thu, Oct 18, 2007 at 04:34:15PM -0400, Jeff Yutzler wrote:
>>     
>>> As of this writing, the NASA Global Mosaic layer (for example, the
>>> second layer in http://www.openlayers.org/dev/examples/example.html) is
>>> down.  These things happen from time to time for whatever reason.  The
>>> problem we have is the behavior of OpenLayers.  The typical OpenLayers
>>> response is to display a pink tile with the
>>> browser's "broken link" icon in the corner.  Users simply do not
>>> appreciate this response.  It does not tell them what they need to know
>>> (that a layer is dead), does not suggest a potential solution (of
>>> turning off the dead layer), and worst of all, it covers up other
>>> potentially useful layers.  Does anyone have a more gracious strategy
>>> for dealing with this situation?
>>>       
>> The OpenLayers.Util.onImageLoadError function is designed to be
>> overridden. The OpenLayers default behavior is just that. If you just
>> want to have images not show up, you can override the function, and
>> change the this.style.display = ""; to not be there -- then you'll not
>> see the tiles, as they'll stay hidden.
>>
>> OpenLayers.Util.onImageLoadErrorColor is also designed to be overridden
>> -- setting it to '' will cause the 'pink' to go away.
>>
>> Regards,
>> --
>> Christopher Schmidt
>> MetaCarta
>> _______________________________________________
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>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>
>>     
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