THANK YOU - First of all I´d like to say thank you to the community because as a newbee it was hard to get my first app to work. But now it does and that's because here I found so much helpful answers! Mille Grazie.
THE APP - My app organises my small parts collection in the workshop. In an SQLite database all Metadata is stored like: Box Numbers, Shelf and Rack Numbers, Descriptions of what is in the Boxes. All Images are stored in a Folder on the OS. In the Database I only save the Paths to the Images.
THE PROBLEM - When I do a Search I get the Results in a Pagination Window displaying only 5 Matches. You can klick NEXT to see the next 5 Matches. But sometimes not all Pictures are loaded properly. Some Frames stay blank sometimes. Then you klick NEXT - and - BACK and then they are there. I´m sure the Problem is that my Computer can´t load all the images always quick enough.
THE QUESTION - Is there a way in TKinter to make the Program check if an Image was properly displayed before proceeding with the next one?
This is the desired view with all Images loaded: