[OpenLayers-Users] Image flickering in Firefox when changing the URL of an image layer

[Bart van den Eijnden]

I can reproduce it in both Firefox 3.5.5 and Safari on Mac.

Best regards,
Bart

On Nov 18, 2009, at 2:38 PM, Marc Jansen wrote:

> Hi Pedro,
> 
> Thanks for your input... but it seems odd: in my FF (Mozilla/5.0 (X11; 
> U; Linux i686; de; rv:1.9.1.5) Gecko/20091109 Ubuntu/9.10 (karmic) 
> Firefox/3.5.5) the upper OL-client is still flickering. Maybe some 
> setting in Firefox I changed? Or a plugin?
> 
> I am really puzzled.
> 
> Can someone else reproduce the flickering?
> 
> Regards,
> Marc
> 
> Pedro Baracho wrote:
>> For the record, I am currently using FF 3.5.5, Gecko/20091102 on 
>> Windows and I don't see any flickering in the link you posted.
>> 
>> On Wed, Nov 18, 2009 at 11:10 AM, Marc Jansen <jansen at terrestris.de 
>> <mailto:jansen at terrestris.de>> wrote:
>> 
>>    Hi list,
>> 
>>    when the URL of an imagelayer is changed via the APIMethod setUrl, the
>>    image is flickering regardless of the browser cache or the transition
>>    effect. This behaviour can be seen e.g. here:
>> 
>>    http://www.webmapcenter.de/wetterradar/animation.html
>> 
>>    In that demo the URL of the imagelayer is changed every 500 ms and the
>>    flickering should be easy to spot (at least if you wait for roughly 20
>>    seconds). Firebugs Net-tab shows that the images are being requested
>>    over and over.
>> 
>>    The flickering is only noticeable in Firefox (3.5 Win and Linux);
>>    Opera
>>    10 and IE 8 work like a charm (they cache the varying images). The
>>    changing of the src of a pure <img> with JavaScript does not show the
>>    flickering (as can be seen in the above link, too). I don't have
>>    results
>>    for other browsers.
>> 
>>    Can anybody help me identify the root of this flickering? I am unsure
>>    whether this Firefox bugreport is maybe relevant to this issue:
>>    https://bugzilla.mozilla.org/show_bug.cgi?id=492052. I doubt that
>>    it is
>>    related to apache settings (Caching- or Expires-Headers) as the
>>    pure JS
>>    solution isn't flickering at all.
>> 
>>    Any help or advice on this issue would be great!
>> 
>>    Regards,
>>    Marc
>> 
>>    BTW.: If someone shows me a better alternative to build an
>>    animation of
>>    different Imagelayers, I would be happy as well :-)
>> 
>> 
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>> 
> 
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