def __init__(self, headings):
""" Constuct a list header. """
super(ListHeader, self).__init__()
self.append_class(self.LIST_HEADER_CLASS)
self.append_class(HEADED_LIST_ITEM_CLASS)
for h in headings:
col_head = Div()
col_head.set_text(h)
col_head.append_class(LIST_COLUMN_CLASS)
self.append_child(col_head)