[Gimp-developer] preview update problems

[David Hodson]

I'm having problems adding a preview (gimp_drawable_preview_new) to an 
existing plugin. Some experimentation with the sample code shows that 
using gimp_pixel_rgn_get_row() and gimp_pixel_rgn_set_row() to iterate 
through the image region, the preview updates correctly, but replacing 
them with gimp_pixel_rgns_register() and gimp_pixel_rgns_process() stops 
the preview updating. Why is this, and how do I cause a preview update?

-- 
David Hodson  --  this night wounds time