[OT] Guidelines for handling data in a GUI application?

[Jef Driesen <jefdriesen hotmail com>]

I'm ready to write my first real GUI application (using gtkmm of 
course). I studied the gtkmm documentation and can make simple 
applications. The focus there was on the user interface part (e.g. 
adding widgets, event handling and stuff like that). But that is only 
one part of an application. My application must also be able to show and 
modify data. But I don't know how to do that in a "well designed" way.

I looked for more information, but I couldn't find what I'm looking for. 
I do find lots of information on GUI toolkits and database APIs, but 
almost nothing useful on how to glue them together. Does anyone know 
where I can find more information on this (websites, books,...)?

To give you some more background on my project: My application stores 
its data in an sqlite database. The application will have one main 
window, probably some type of master-detail view, with a listview for a 
(readonly) overview of the main database table and a detail part to 
modify that data. All the other data in the database is related to that 
main table (e.g. data to populate widgets in the detail part of the main 
window) and modified using secondary windows.