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from __future__ import absolute_import, division, print_function
import operator
import numpy as np
from glue.external import six
from glue.core.component_link import BinaryComponentLink
from glue.core.subset import InequalitySubsetState
__all__ = ['PixelComponentID', 'ComponentID', 'PixelComponentID', 'ComponentIDDict']
# access to ComponentIDs via .item[name]
class ComponentIDDict(object):
def __init__(self, data, **kwargs):
self.data = data
def __getitem__(self, key):
result = self.data.find_component_id(key)
if result is None:
raise KeyError("ComponentID not found or not unique: %s"
% key)
return result
class ComponentID(object):
"""
References a :class:`glue.core.component.Component` object within a :class:`~glue.core.data.Data` object.
ComponentIDs behave as keys::
component_id = data.id[name]
data[component_id] -> numpy array
"""
def __init__(self, label, hidden=False):
""":param label: Name for the ID
:type label: str"""
self._label = str(label)
self._hidden = hidden
@property
def label(self):
return self._label
@label.setter
def label(self, value):
"""Change label.
.. warning::
Label changes are not currently tracked by client
classes. Label's should only be changd before creating other
client objects
"""
self._label = str(value)
@property
def hidden(self):
"""Whether to hide the component by default"""
return self._hidden
def __str__(self):
return str(self._label)
def __repr__(self):
return str(self._label)
def __eq__(self, other):
if np.issubsctype(type(other), np.number):
return InequalitySubsetState(self, other, operator.eq)
return other is self
# In Python 3, if __eq__ is defined, then __hash__ has to be re-defined
if six.PY3:
__hash__ = object.__hash__
def __ne__(self, other):
if np.issubsctype(type(other), np.number):
return InequalitySubsetState(self, other, operator.ne)
return other is not self
def __gt__(self, other):
return InequalitySubsetState(self, other, operator.gt)
def __ge__(self, other):
return InequalitySubsetState(self, other, operator.ge)
def __lt__(self, other):
return InequalitySubsetState(self, other, operator.lt)
def __le__(self, other):
return InequalitySubsetState(self, other, operator.le)
def __add__(self, other):
return BinaryComponentLink(self, other, operator.add)
def __radd__(self, other):
return BinaryComponentLink(other, self, operator.add)
def __sub__(self, other):
return BinaryComponentLink(self, other, operator.sub)
def __rsub__(self, other):
return BinaryComponentLink(other, self, operator.sub)
def __mul__(self, other):
return BinaryComponentLink(self, other, operator.mul)
def __rmul__(self, other):
return BinaryComponentLink(other, self, operator.mul)
def __div__(self, other):
return BinaryComponentLink(self, other, operator.div)
def __rdiv__(self, other):
return BinaryComponentLink(other, self, operator.div)
def __truediv__(self, other):
return BinaryComponentLink(self, other, operator.truediv)
def __rtruediv__(self, other):
return BinaryComponentLink(other, self, operator.truediv)
def __pow__(self, other):
return BinaryComponentLink(self, other, operator.pow)
def __rpow__(self, other):
return BinaryComponentLink(other, self, operator.pow)
class PixelComponentID(ComponentID):
"""
The ID of a component which is a pixel position in the data - this allows
us to make assumptions in certain places. For example when a polygon
selection is done in pixel space, it can easily be broadcast along
dimensions.
"""
def __init__(self, axis, label, hidden=False):
self.axis = axis
super(PixelComponentID, self).__init__(label, hidden=hidden)
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