def remove_component(self, component_id):
""" Remove a component from a data set
:param component_id: the component to remove
:type component_id: :class:`~glue.core.component_id.ComponentID`
"""
if component_id in self._components:
self._components.pop(component_id)
if self.hub:
msg = DataRemoveComponentMessage(self, component_id)
self.hub.broadcast(msg)
msg = ComponentsChangedMessage(self)
self.hub.broadcast(msg)
def remove_component(self, component_id):
""" Remove a component from a data set
:param component_id: the component to remove
:type component_id: :class:`~glue.core.component_id.ComponentID`
"""
# TODO: avoid too many messages when removing a component triggers
# the removal of derived components.
if component_id in self._components:
self._components.pop(component_id)
self._removed_derived_that_depend_on(component_id)
if self.hub:
msg = DataRemoveComponentMessage(self, component_id)
self.hub.broadcast(msg)
msg = ComponentsChangedMessage(self)
self.hub.broadcast(msg)
def add_component(self, component, label):
""" Add a new component to this data set.
:param component: object to add. Can be a Component,
array-like object, or ComponentLink
:param label:
The label. If this is a string,
a new :class:`glue.core.component_id.ComponentID` with this label will be
created and associated with the Component
:type component: :class:`~glue.core.component.Component` or
array-like
:type label: :class:`str` or :class:`~glue.core.component_id.ComponentID`
:raises:
TypeError, if label is invalid
ValueError if the component has an incompatible shape
:returns:
The ComponentID associated with the newly-added component
"""
if isinstance(component, ComponentLink):
return self.add_component_link(component, label=label)
if not isinstance(component, Component):
component = Component.autotyped(component)
if isinstance(component, DerivedComponent):
if len(self._components) == 0:
raise TypeError(
"Cannot add a derived component as a first component")
component.set_parent(self)
if not (self._check_can_add(component)):
raise ValueError("The dimensions of component %s are "
"incompatible with the dimensions of this data: "
"%r vs %r" % (label, component.shape, self.shape))
if isinstance(label, ComponentID):
component_id = label
if component_id.parent is None:
component_id.parent = self
else:
component_id = ComponentID(label, parent=self)
if len(self._components) == 0:
# TODO: make sure the following doesn't raise a componentsraised message
self._create_pixel_and_world_components(ndim=component.ndim)
# In some cases, such as when loading a session, we actually disable the
# auto-creation of pixel and world coordinates, so the first component
# may be a coordinate component with no shape. Therefore we only set the
# shape once a component has a valid shape rather than strictly on the
# first component.
if self._shape == () and component.shape != ():
self._shape = component.shape
is_present = component_id in self._components
self._components[component_id] = component
if self.hub and not is_present:
msg = DataAddComponentMessage(self, component_id)
self.hub.broadcast(msg)
msg = ComponentsChangedMessage(self)
self.hub.broadcast(msg)
return component_id
def add_component(self, component, label, hidden=False):
""" Add a new component to this data set.
:param component: object to add. Can be a Component,
array-like object, or ComponentLink
:param label:
The label. If this is a string,
a new :class:`glue.core.component_id.ComponentID` with this label will be
created and associated with the Component
:type component: :class:`~glue.core.component.Component` or
array-like
:type label: :class:`str` or :class:`~glue.core.component_id.ComponentID`
:raises:
TypeError, if label is invalid
ValueError if the component has an incompatible shape
:returns:
The ComponentID associated with the newly-added component
"""
if isinstance(component, ComponentLink):
component = DerivedComponent(self, component)
if not isinstance(component, Component):
component = Component.autotyped(component)
if isinstance(component, DerivedComponent):
component.set_parent(self)
if not (self._check_can_add(component)):
raise ValueError("The dimensions of component %s are "
"incompatible with the dimensions of this data: "
"%r vs %r" % (label, component.shape, self.shape))
if isinstance(label, ComponentID):
component_id = label
else:
component_id = ComponentID(label, hidden=hidden)
is_present = component_id in self._components
self._components[component_id] = component
first_component = len(self._components) == 1
if first_component:
if isinstance(component, DerivedComponent):
raise TypeError("Cannot add a derived component as "
"first component")
self._shape = component.shape
self._create_pixel_and_world_components()
if self.hub and (not is_present):
msg = DataAddComponentMessage(self, component_id)
self.hub.broadcast(msg)
msg = ComponentsChangedMessage(self)
self.hub.broadcast(msg)
return component_id
