PyQt4控件失去焦点和获得焦点

#QListView控件多选设置
self.ui.listView.setSelectionMode(QAbstractItemView.ExtendedSelection)

#初始化QListView控件焦点事件

self.ui.listView.installEventFilter(self)

#焦点响应事件

def eventFilter(self, widget, event):

     #失去焦点

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

        print 'focus out'

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

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

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