UI.py 文件源码

def keypress(self, size, key):
        if key=='enter':
            line=self.edit_text.strip()
            if line:
                urwid.emit_signal(self,'line_entered', line)
                self.history.append(line)
            self._history_index=len(self.history)
            self.edit_text=u''
        if key=='up':

            self._history_index-=1
            if self._history_index< 0:
                self._history_index= 0
            else:
                self.edit_text=self.history[self._history_index]
        if key=='down':
            self._history_index+=1
            if self._history_index>=len(self.history):
                self._history_index=len(self.history)
                self.edit_text=u''
            else:
                self.edit_text=self.history[self._history_index]
        else:
            urwid.Edit.keypress(self, size, key)