How to update the MainWindow query from an "external" class?

["Abdul Pallarés" <abdulet gmail com>]

Hi everybody!!

I'm developing an extension that needs to modify the MainWindow's query
but all the objects that works with this property are privated, is ti
possible to modify? does anyone knows a way? can u tell what object to
use or way to do? The objective of the extension is to find the pictures
not exported with any of the exporters so you know what pictures to
upload to flikr for example

any comment would be very gracefull i dont know what to try more. At the
moment i can show it in a view mode window but its no confortable to
upload a lot of pìctures and i don't want to touch the core of the
application, the next approach could be to open a new MainWindow maybe
but its not a clean way

cheers folks