Could you use a GtkListBox? With a list box you can add a widget to the row and 
connect the "enter-notify-event" and "leave-notify-event" signals. There is 
example code for a list box at

https://blog.gtk.org/2017/06/01/drag-and-drop-in-lists-revisited/

It is drag and drop but you could change up widgets and connect different 
signals easy enough.


Eric

 


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