@SuppressWarnings("unchecked")
protected void whenClassroomsTableSelectionChanged(ListSelectionEvent anEvent) {
DefaultListSelectionModel source = (DefaultListSelectionModel) anEvent.getSource();
if (source.isSelectionEmpty()) {
classroomSelected = null;
moveAssignmentOfClassroomButton.setEnabled(false);
} else {
int index = source.getMinSelectionIndex();
List<Classroom> model =
((ReadOnlyTableModel<Classroom>) classroomsTable.getModel()).getModel();
classroomSelected = model.get(index);
moveAssignmentOfClassroomButton.setEnabled(
!classroomSelected.equals(assignment.getAssignableItem()));
}
}
