#: A namedtuple which contains information about a child change event.
#: The `old` slot will be the ordered list of old children. The `new`
#: slot will be the ordered list of new children.
ChildrenEvent = namedtuple('ChildrenEvent', 'old new')
#: A namedtuple which contains information about a parent change event.
#: The `old` slot will be the old parent and the `new` slot will be
#: the new parent.
ParentEvent = namedtuple('ParentEvent', 'old new')
#: The identifier generator for object instances.
object_id_generator = id_generator('o_')
class ChildrenEventContext(object):
""" A context manager which will emit a child event on an Object.
This context manager will automatically emit the child event on an
Object when the context is exited. This context manager can also be
safetly nested; only the top-level context for a given object will
emit the child event, effectively collapsing all transient state.
"""
#: Class level storage for tracking nested context managers.
_counters = defaultdict(int)
def __init__(self, parent):
#------------------------------------------------------------------------------
# Copyright (c) 2012, Enthought, Inc.
# All rights reserved.
#------------------------------------------------------------------------------
import logging
from urlparse import urlparse
from enaml.utils import id_generator
from .q_deferred_caller import deferredCall
from .qt_resource import convert_resource
logger = logging.getLogger(__name__)
#: An id generator for making requests to the server.
req_id_generator = id_generator('r_')
class DeferredResource(object):
""" An deferred resource object returned by a `QtURLRequestManager`.
Instances of this class are provided to widgets when they request a
resource url. Since the url may need to be retrieved from a server,
Loading occurs asynchronously. This object allows a widget to supply
a callback to be invoked when the resource is loaded.
"""
__slots__ = ('_callback')
def __init__(self):
""" Initialize a DeferredResource.
#: The dispatch function for action dispatching.
dispatch_action = make_dispatcher('on_action_', logger)
#: A namedtuple which contains information about a child change event.
#: The `old` slot will be the ordered list of old children. The `new`
#: slot will be the ordered list of new children.
ChildrenEvent = namedtuple('ChildrenEvent', 'old new')
#: A namedtuple which contains information about a parent change event.
#: The `old` slot will be the old parent and the `new` slot will be
#: the new parent.
ParentEvent = namedtuple('ParentEvent', 'old new')
#: The identifier generator for object instances.
object_id_generator = id_generator('o_')
class ChildrenEventContext(object):
""" A context manager which will emit a child event on an Object.
This context manager will automatically emit the child event on an
Object when the context is exited. This context manager can also be
safetly nested; only the top-level context for a given object will
emit the child event, effectively collapsing all transient state.
"""
#: Class level storage for tracking nested context managers.
_counters = defaultdict(int)
def __init__(self, parent):
# All rights reserved.
#------------------------------------------------------------------------------
import logging
from urlparse import urlparse
from enaml.utils import id_generator
from .q_deferred_caller import deferredCall
from .qt_resource import convert_resource
logger = logging.getLogger(__name__)
#: An id generator for making requests to the server.
req_id_generator = id_generator('r_')
class DeferredResource(object):
""" An deferred resource object returned by a `QtURLRequestManager`.
Instances of this class are provided to widgets when they request a
resource url. Since the url may need to be retrieved from a server,
Loading occurs asynchronously. This object allows a widget to supply
a callback to be invoked when the resource is loaded.
"""
__slots__ = ('_callback')
def __init__(self):
""" Initialize a DeferredResource.
