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

[Marc Jansen]

Thanks Bart. At least I don't imagine the flickr :-)

Crazy enough: I cannot reproduce the flickering on my machine right now. 
And I did not change anything.

Regards,
Marc



Bart van den Eijnden wrote:
> 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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