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""" A minimal application using the Qt console-style IPython frontend.
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"""
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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# Systemm library imports
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from PyQt4 import QtGui
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# Local imports
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from IPython.external.argparse import ArgumentParser
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from IPython.frontend.qt.console.frontend_widget import FrontendWidget
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from IPython.frontend.qt.console.ipython_widget import IPythonWidget
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from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget
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from IPython.frontend.qt.kernelmanager import QtKernelManager
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#-----------------------------------------------------------------------------
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# Constants
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#-----------------------------------------------------------------------------
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LOCALHOST = '127.0.0.1'
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#-----------------------------------------------------------------------------
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# Classes
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#-----------------------------------------------------------------------------
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class MainWindow(QtGui.QMainWindow):
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#---------------------------------------------------------------------------
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# 'object' interface
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#---------------------------------------------------------------------------
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def __init__(self, frontend, existing=False):
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""" Create a MainWindow for the specified FrontendWidget.
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"""
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super(MainWindow, self).__init__()
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self._frontend = frontend
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self._existing = existing
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self._frontend.exit_requested.connect(self.close)
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self.setCentralWidget(frontend)
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#---------------------------------------------------------------------------
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# QWidget interface
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#---------------------------------------------------------------------------
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def closeEvent(self, event):
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""" Reimplemented to prompt the user and close the kernel cleanly.
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"""
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kernel_manager = self._frontend.kernel_manager
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# closeall =
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if kernel_manager and kernel_manager.channels_running:
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title = self.window().windowTitle()
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reply = QtGui.QMessageBox.question(self, title,
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"Close just this console, or shutdown the kernel and close "+
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"all windows attached to it?", "Cancel",
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'Close Console', 'Close All')
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print reply
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if reply == 2:
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kernel_manager.shutdown_kernel()
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#kernel_manager.stop_channels()
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event.accept()
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elif reply == 1:
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if self._existing:
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# I don't have the Kernel, I can shutdown
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event.accept()
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else:
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# only destroy the Window, save the Kernel
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self.destroy()
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event.ignore()
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else:
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event.ignore()
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#-----------------------------------------------------------------------------
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# Main entry point
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#-----------------------------------------------------------------------------
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def main():
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""" Entry point for application.
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"""
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# Parse command line arguments.
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parser = ArgumentParser()
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kgroup = parser.add_argument_group('kernel options')
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kgroup.add_argument('-e', '--existing', action='store_true',
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help='connect to an existing kernel')
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kgroup.add_argument('--ip', type=str, default=LOCALHOST,
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help='set the kernel\'s IP address [default localhost]')
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kgroup.add_argument('--xreq', type=int, metavar='PORT', default=0,
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help='set the XREQ channel port [default random]')
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kgroup.add_argument('--sub', type=int, metavar='PORT', default=0,
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help='set the SUB channel port [default random]')
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kgroup.add_argument('--rep', type=int, metavar='PORT', default=0,
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help='set the REP channel port [default random]')
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kgroup.add_argument('--hb', type=int, metavar='PORT', default=0,
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help='set the heartbeat port [default: random]')
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egroup = kgroup.add_mutually_exclusive_group()
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egroup.add_argument('--pure', action='store_true', help = \
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'use a pure Python kernel instead of an IPython kernel')
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egroup.add_argument('--pylab', type=str, metavar='GUI', nargs='?',
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const='auto', help = \
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"Pre-load matplotlib and numpy for interactive use. If GUI is not \
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given, the GUI backend is matplotlib's, otherwise use one of: \
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['tk', 'gtk', 'qt', 'wx', 'inline'].")
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wgroup = parser.add_argument_group('widget options')
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wgroup.add_argument('--paging', type=str, default='inside',
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choices = ['inside', 'hsplit', 'vsplit', 'none'],
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help='set the paging style [default inside]')
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wgroup.add_argument('--rich', action='store_true',
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help='enable rich text support')
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wgroup.add_argument('--gui-completion', action='store_true',
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help='use a GUI widget for tab completion')
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args = parser.parse_args()
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# Don't let Qt or ZMQ swallow KeyboardInterupts.
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import signal
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signal.signal(signal.SIGINT, signal.SIG_DFL)
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# Create a KernelManager and start a kernel.
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kernel_manager = QtKernelManager(xreq_address=(args.ip, args.xreq),
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sub_address=(args.ip, args.sub),
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rep_address=(args.ip, args.rep),
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hb_address=(args.ip, args.hb))
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if args.ip == LOCALHOST and not args.existing:
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if args.pure:
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kernel_manager.start_kernel(ipython=False)
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elif args.pylab:
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kernel_manager.start_kernel(pylab=args.pylab)
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else:
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kernel_manager.start_kernel()
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kernel_manager.start_channels()
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# Create the widget.
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app = QtGui.QApplication([])
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if args.pure:
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kind = 'rich' if args.rich else 'plain'
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widget = FrontendWidget(kind=kind, paging=args.paging)
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elif args.rich or args.pylab:
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widget = RichIPythonWidget(paging=args.paging)
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else:
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widget = IPythonWidget(paging=args.paging)
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widget.gui_completion = args.gui_completion
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widget.kernel_manager = kernel_manager
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# Create the main window.
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window = MainWindow(widget, args.existing)
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window.setWindowTitle('Python' if args.pure else 'IPython')
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window.show()
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# Start the application main loop.
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app.exec_()
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if __name__ == '__main__':
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main()
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