[Chameleon] Rendering inverse ROI image

[Jan Jansen]

Hi List,

I was wondering if it is possible to customize the rendering of the ROI Image. I want to obtain a kind of 'inverse' version of the currently drawn ROI image, e.g. the selected ROI rectangle being transparent, and the 'unselected' area's having a colour and opacity defined though the attributes of the ROI widget.. 
Which files or function(s) should I adjust to achieve this?
Any comments / help would be highly appreciated.

Best regards,

Jan Jansen
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.maptools.org/pipermail/chameleon/attachments/20050715/b3b20d02/attachment-0001.html