So far as making this OO, I wrote something vaguely similar to this recently, in that it had rows of mostly identical widgets to collect user input. I decided that a "row" was a good candidate to be made a class. On a level above that, you could have a "grid" or "row collection" class that handles things like adding and removing rows to a list or grid. Each of those classes would be partially handling some widgets.
In addition to being easier to read, the good thing about this is that in my app you can add and remove rows dynamically. So when you click a button it just calls "add_row()"; click another and it calls "remove_row()". The "grid" object would handle that, and it can make sure you don't have less than $MIN_ROWS rows or more than $MAX_ROWS rows, and keep track of the current number of rows, etc. etc.
Depends what your requirements are though. Only use OO if it makes sense to use it.
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