PyQt4控件失去焦點和獲得焦點

#QListView控件多選設置
self.ui.listView.setSelectionMode(QAbstractItemView.ExtendedSelection)

#初始化QListView控件焦點事件

self.ui.listView.installEventFilter(self)

#焦點響應事件

def eventFilter(self, widget, event):

     #失去焦點

    if event.type() == QtCore.QEvent.FocusOut:

        print 'focus out'

        #注意要有返回值  不然會出 TypeError: invalid result type from mouseoverEvent.eventFilter()
        return False

    #獲得焦點
    if event.type()==QtCore.QEvent.FocusIn:
        print 'focus in'

        return False
    else:
        # we don't care about other events
        return False