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

* Added 'started_listening' and 'stopped_listening' signals to QtKernelManager. The FrontendWidget listens for these signals....

* Added 'started_listening' and 'stopped_listening' signals to QtKernelManager. The FrontendWidget listens for these signals. * Created a metaclass to permit inheriting from both HasTraits and QObject * Made 'continuation_prompt' a protected variable of ConsoleWidget for API consistency * Made FrontendWidget's constructor consistent with QWidget conventions.

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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

      MetaHasTraits = type(HasTraits)

      MetaQObject = type(QtCore.QObject)

      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.

          """

          def __init__(cls, name, bases, dct):

              MetaQObject.__init__(cls, name, bases, dct)

              MetaHasTraits.__init__(cls, name, bases, dct)

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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


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

				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.
				"""

				def __init__(cls, name, bases, dct):
				MetaQObject.__init__(cls, name, bases, dct)
				MetaHasTraits.__init__(cls, name, bases, dct)