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

[Pedro Baracho]

Firebug on, and no flickering.

On Wed, Nov 18, 2009 at 11:58 AM, Marc Jansen <jansen at terrestris.de> wrote:

> Hey Pedro,
>
> Do you have the firebug plugin? Is it enabled for the link with the demo?
> Would you be so kind to test that as well... because right now I cannot
> reproduce the flickering on my machine! (How could that be?)
>
> This is *really* annoying, I can't get my head around the problem.
>
> Thanks and 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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