from swingutils.binding import PropertyAdapter

class CalendarAdapter(PropertyAdapter):

    def __init__(self, holder, srcProperty, dateChooser):

        PropertyAdapter.__init__(self, holder, srcProperty, dateChooser,

                                 u'date')

    def propertyChange(self, event):

        PropertyAdapter.propertyChange(self, event)

        self.destination.enabled = self.source.value is not None

def bindDateChooser(holder, srcProperty, dateChooser, twoway=True):

    adapter = CalendarAdapter(holder, srcProperty, dateChooser)

    holder.addPropertyChangeListener(srcProperty, adapter)

    if twoway:

        dateChooser.addPropertyChangeListener(u'date', adapter)