Vauxhall Astra - Cloth on the rooftop's inside coming off !!!

[kaka_uet]

Hi, I know this might sound like a rather silly question but I was
wondering if anyone could render a bit of an advice for fixing the
inside of my car's rooftop. Apparently the cloth lining, which is
meant to be glued(???) to the rooftop has been coming off gradually and
now literally rests on my head. I would appreciate any advice I can
get.

Thanks

 

[sttam]

i just used some pins for my omega.