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文件: /usr/share/doc/python-urwid-1.1.1/docs/manual/wsel.py
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import urwid class SelectablePudding(urwid.Widget): _sizing = frozenset(['flow']) _selectable = True def __init__(self): self.pudding = "pudding" def rows(self, size, focus=False): return 1 def render(self, size, focus=False): (maxcol,) = size num_pudding = maxcol / len(self.pudding) pudding = self.pudding if focus: pudding = pudding.upper() return urwid.TextCanvas([pudding * num_pudding], maxcol=maxcol) def keypress(self, size, key): (maxcol,) = size if len(key) > 1: return key if key.lower() in self.pudding: # remove letter from pudding n = self.pudding.index(key.lower()) self.pudding = self.pudding[:n] + self.pudding[n+1:] if not self.pudding: self.pudding = "pudding" self._invalidate() else: return key
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