[Chameleon] Rendering inverse ROI image

Jan Jansen jansen at nieuwland.nl
Fri Jul 15 05:22:52 EDT 2005


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
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