John Doe 25 This is the John Doe row Mary Unknown 50 This is the Mary Unknown row Builder demo gtk3-demo 250 440 Builder True True The menubar True _File True True _New True True _Open True True _Save True True Save _As True True True _Quit True win.quit True _Edit True True _Copy True True _Cut True True _Paste True True _Help True True _Help True win.help True _About True win.about False True The toolbar True New Create a new file document-new True Open Open a file document-open True Save Save a file document-save True True True Copy Copy selected object into the clipboard edit-copy True Cut Cut selected object into the clipboard edit-cut True Paste Paste object from the clipboard edit-paste 1 False in True True liststore1 3 Name list A list of person with name, surname and age columns Name 0 Surname 1 Age 2 2 True True 3 False