def _filter_changed(self, filter):
""" Handles the 'filter' expression being changed.
"""
self._block = ExpressionBlock.from_string(filter)
self._inputs = dict.fromkeys(self._block.inputs)
self.updated = True
self._name_updated()
def _evaluate_changed ( self, evaluate ):
""" Handles the 'evaluate' trait being changed.
"""
self._block = ExpressionBlock.from_string( evaluate )
self._inputs = dict.fromkeys( self._block.inputs )
self._data = None
if self.context is not None:
self.context.post_context_modified(
ContextModified( modified = [ self.name ] )
)
