[OpenLayers-Trac] Re: [OpenLayers] #3431: set opacity on layer divs, not on tiles and markers

[OpenLayers]

#3431: set opacity on layer divs, not on tiles and markers
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  Reporter:  ahocevar  |       Owner:  euzuro      
      Type:  feature   |      Status:  reopened    
  Priority:  minor     |   Milestone:  2.11 Release
 Component:  Layer     |     Version:  SVN         
Resolution:            |    Keywords:              
     State:  Review    |  
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Comment(by ahocevar):

 Maybe an explanation about [attachment:opacity.patch] is in order: in IE8,
 the filter is not applied to positioned child elements (like in our case,
 where {{{style.position}}} is set to {{{absolute}}}). And in addition, the
 filter needs to be applied ''after'' an image is loaded. So we use a
 loadend listener and just set the filter again, to make sure that it gets
 applied. In css, setting a width and height in pixels for the layer div is
 also necessary, because otherwise the children won't render at all. The
 whole workaround is only necessary for IE8.

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Ticket URL: <http://trac.openlayers.org/ticket/3431#comment:14>
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