MainWindow 0 0 800 600 Reading Helper Read Edit Qt::Horizontal Qt::Vertical 20 40 Add Book Add Person 0 0 800 24 File Edit Books People Quit Add Add Book Edit Edit Book Add Add A Person Edit Edit A Person Read Read Book Preferences editBtn clicked() actionEditPerson trigger() 722 117 -1 -1 addBtn clicked() actionAddPerson trigger() 722 532 -1 -1 bookBtn clicked() actionAddBook trigger() 722 491 -1 -1 readBtn clicked() actionRead trigger() 722 67 -1 -1