def set(self, x):
if self._xtype is not None:
if not isinstance(x, self._xtype):
raise TTypeError(
"Invalid value for option `%s`: expected %s, "
"instead got %s" %
(self._name, name_type(self._xtype), name_type(type(x))))
self._value = x
if self._onchange is not None:
self._onchange(x)
def __setattr__(self, key, val):
opt = self._get_opt(key)
if isinstance(opt, DtOption):
if is_type(val, opt.xtype):
opt.value = val
else:
fullkey = self._prefix + key
exptype = name_type(opt.xtype)
acttype = name_type(type(val))
raise TTypeError("Invalid value for option `%s`: expected "
"type %s, got %s instead" %
(fullkey, exptype, acttype))
else:
raise DtAttributeError("Cannot modify group of options `%s`" %
(self._prefix + key))
def register_option(self, key, xtype, default, doc=None):
assert isinstance(key, str)
idot = key.find(".")
if idot == 0:
raise TValueError("Invalid option name `%s`" % key)
elif idot > 0:
prekey = key[:idot]
preval = self._keyvals.get(prekey, None)
if preval is None:
preval = DtConfig(self._prefix + prekey)
self._keyvals[prekey] = preval
if isinstance(preval, DtConfig):
subkey = key[idot + 1:]
preval.register_option(subkey, xtype, default, doc)
else:
fullkey = self._prefix + key
fullprekey = self._prefix + prekey
raise TValueError("Cannot register option `%s` because `%s` "
"is already registered as an option"
% (fullkey, fullprekey))
elif key in self._keyvals:
fullkey = self._prefix + key
raise TValueError("Option `%s` already registered" % fullkey)
elif not (xtype is callable or is_type(default, xtype)):
raise TValueError("Default value `%s` is not of type %s"
% (default, name_type(xtype)))
else:
opt = DtOption(xtype=xtype, default=default, doc=doc,
name=self._prefix + key)
self._keyvals[key] = opt
def __init__(self, name, default, doc=None, xtype=None, onchange=None):
self._name = name
self._default = default
self._doc = doc
self._value = default
self._xtype = xtype
self._onchange = onchange
if xtype and not isinstance(default, xtype):
raise TTypeError("Default value `%r` is not of type %s" %
(default, name_type(xtype)))