upstream/ipython Files · IPython/frontend/qt/util.py

* Improved frontend-side kernel restart support....

* Improved frontend-side kernel restart support. * Updated pykernel to support heartbeat. * Various minor cleanups

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      """ Defines miscellaneous Qt-related helper classes and functions.

      """

      # System library imports.

      from PyQt4 import QtCore

      # IPython imports.

      from IPython.utils.traitlets import HasTraits

      #-----------------------------------------------------------------------------

      # Metaclasses

      #-----------------------------------------------------------------------------

      MetaHasTraits = type(HasTraits)

      MetaQObject = type(QtCore.QObject)

      # You can switch the order of the parents here and it doesn't seem to matter.

      class MetaQObjectHasTraits(MetaQObject, MetaHasTraits):

          """ A metaclass that inherits from the metaclasses of both HasTraits and

              QObject. 

              Using this metaclass allows a class to inherit from both HasTraits and

              QObject. See QtKernelManager for an example.

          """

          pass

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				""" Defines miscellaneous Qt-related helper classes and functions.
				"""

				# System library imports.
				from PyQt4 import QtCore

				# IPython imports.
				from IPython.utils.traitlets import HasTraits

				#-----------------------------------------------------------------------------
				# Metaclasses
				#-----------------------------------------------------------------------------

				MetaHasTraits = type(HasTraits)
				MetaQObject = type(QtCore.QObject)

				# You can switch the order of the parents here and it doesn't seem to matter.
				class MetaQObjectHasTraits(MetaQObject, MetaHasTraits):
				""" A metaclass that inherits from the metaclasses of both HasTraits and
				QObject.

				Using this metaclass allows a class to inherit from both HasTraits and
				QObject. See QtKernelManager for an example.
				"""
				pass