|
|
# System library imports
|
|
|
from PyQt4 import QtCore, QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from frontend_widget import FrontendWidget
|
|
|
|
|
|
|
|
|
class IPythonWidget(FrontendWidget):
|
|
|
""" A FrontendWidget for an IPython kernel.
|
|
|
"""
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'QObject' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, parent=None):
|
|
|
super(IPythonWidget, self).__init__(parent)
|
|
|
|
|
|
self._magic_overrides = {}
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _execute(self, source, hidden):
|
|
|
""" Reimplemented to override magic commands.
|
|
|
"""
|
|
|
magic_source = source.strip()
|
|
|
if magic_source.startswith('%'):
|
|
|
magic_source = magic_source[1:]
|
|
|
magic, sep, arguments = magic_source.partition(' ')
|
|
|
if not magic:
|
|
|
magic = magic_source
|
|
|
|
|
|
callback = self._magic_overrides.get(magic)
|
|
|
if callback:
|
|
|
output = callback(arguments)
|
|
|
if output:
|
|
|
self.appendPlainText(output)
|
|
|
self._show_prompt()
|
|
|
else:
|
|
|
super(IPythonWidget, self)._execute(source, hidden)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'FrontendWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def execute_file(self, path, hidden=False):
|
|
|
""" Reimplemented to use the 'run' magic.
|
|
|
"""
|
|
|
self.execute('run %s' % path, hidden=hidden)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'IPythonWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def set_magic_override(self, magic, callback):
|
|
|
""" Overrides an IPython magic command. This magic will be intercepted
|
|
|
by the frontend rather than passed on to the kernel and 'callback'
|
|
|
will be called with a single argument: a string of argument(s) for
|
|
|
the magic. The callback can (optionally) return text to print to the
|
|
|
console.
|
|
|
"""
|
|
|
self._magic_overrides[magic] = callback
|
|
|
|
|
|
def remove_magic_override(self, magic):
|
|
|
""" Removes the override for the specified magic, if there is one.
|
|
|
"""
|
|
|
try:
|
|
|
del self._magic_overrides[magic]
|
|
|
except KeyError:
|
|
|
pass
|
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
import signal
|
|
|
from IPython.frontend.qt.kernelmanager import QtKernelManager
|
|
|
|
|
|
# Create a KernelManager.
|
|
|
kernel_manager = QtKernelManager()
|
|
|
kernel_manager.start_kernel()
|
|
|
kernel_manager.start_listening()
|
|
|
|
|
|
# Don't let Qt or ZMQ swallow KeyboardInterupts.
|
|
|
# FIXME: Gah, ZMQ swallows even custom signal handlers. So for now we leave
|
|
|
# behind a kernel process when Ctrl-C is pressed.
|
|
|
#def sigint_hook(signum, frame):
|
|
|
# QtGui.qApp.quit()
|
|
|
#signal.signal(signal.SIGINT, sigint_hook)
|
|
|
signal.signal(signal.SIGINT, signal.SIG_DFL)
|
|
|
|
|
|
# Create the application, making sure to clean up nicely when we exit.
|
|
|
app = QtGui.QApplication([])
|
|
|
def quit_hook():
|
|
|
kernel_manager.stop_listening()
|
|
|
kernel_manager.kill_kernel()
|
|
|
app.aboutToQuit.connect(quit_hook)
|
|
|
|
|
|
# Launch the application.
|
|
|
widget = IPythonWidget()
|
|
|
widget.kernel_manager = kernel_manager
|
|
|
widget.setWindowTitle('Python')
|
|
|
widget.resize(640, 480)
|
|
|
widget.show()
|
|
|
app.exec_()
|
|
|
|
|
|
|
|
|
|
