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from Components.Converter.Converter import Converter
from Components.Element import cached
class StringListSelection(Converter, object):
"extracts the first element of a the current string list element for displaying it on LCD"
def __init__(self, args):
Converter.__init__(self, args)
def selChanged(self):
self.downstream_elements.changed((self.CHANGED_ALL, 0))
@cached
def getText(self):
cur = self.source.current
if cur and len(cur):
return cur[0]
return None
text = property(getText)
def changed(self, what):
if what[0] == self.CHANGED_DEFAULT:
self.source.onSelectionChanged.append(self.selChanged)
Converter.changed(self, what)
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