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"""Defines a KernelManager that provides signals and slots."""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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from IPython.external.qt import QtCore
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from IPython.utils.traitlets import HasTraits, Type
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from .util import MetaQObjectHasTraits, SuperQObject
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class QtKernelRestarterMixin(MetaQObjectHasTraits('NewBase', (HasTraits, SuperQObject), {})):
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_timer = None
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class QtKernelManagerMixin(MetaQObjectHasTraits('NewBase', (HasTraits, SuperQObject), {})):
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""" A KernelClient that provides signals and slots.
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"""
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kernel_restarted = QtCore.Signal()
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class QtKernelClientMixin(MetaQObjectHasTraits('NewBase', (HasTraits, SuperQObject), {})):
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""" A KernelClient that provides signals and slots.
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"""
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# Emitted when the kernel client has started listening.
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started_channels = QtCore.Signal()
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# Emitted when the kernel client has stopped listening.
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stopped_channels = QtCore.Signal()
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#---------------------------------------------------------------------------
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# 'KernelClient' interface
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#---------------------------------------------------------------------------
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#------ Channel management -------------------------------------------------
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def start_channels(self, *args, **kw):
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""" Reimplemented to emit signal.
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"""
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super(QtKernelClientMixin, self).start_channels(*args, **kw)
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self.started_channels.emit()
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def stop_channels(self):
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""" Reimplemented to emit signal.
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"""
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super(QtKernelClientMixin, self).stop_channels()
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self.stopped_channels.emit()
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