Long story short :
I moved to the Gnome 3.10 desktop environment and I enjoy ( I'll blog post more about soon ). But I found the lack of thumbnail support for 80% of my files in 'Files' frustrating. No *.ora and *.kra thumbnails ? ( aka Open Raster , and Krita native file format ). Both multi-layered, both open format, both awesome.
A lot of thumbnailer exist over the Internet for 'Files' ; but most are broken : based on gtk2, or older version of Python, or using old Gconf way under Gnome 2. So, I decided to get hand dirty and write my own. Surprisingly , it worked and if you look at my code, I promise you a good laugh. But it works. So I share. Download and Install :
All you need is here : https://github.com/Deevad/gnome-kra-ora-thumbnailer
Scroll down on the link and start by the README file ; I tried to explain all in it. Notes :
- Works also for Linux Mint 's Cinnamon Nemo file browser.
- Don't forget in preferences to allow thumbnail preview for files larger than 100MB ; those layered files tend to be large.