upstream/ipython Files · IPython/terminal/pt_inputhooks/qt.py

Always run the OS X loop even if no windows....

Always run the OS X loop even if no windows. Otherwise this can trigger infinite Python-Icon-In-Dock bouncing. See . I will guess that this is because application on OS X may not have windows and still need to process events. It may be that an alternative is to run the loop only once the first time, but I'm unsure. at_least_once = False def inputhook(context): """Inputhook for Cocoa (NSApp)""" NSApp = _NSApp() window_count = msg( msg(NSApp, n('windows')), n('count') ) if not window_count and not at_least_once: at_least_once = True return _stop_on_read(context.fileno()) msg(NSApp, n('run')) if not _triggered.is_set(): # app closed without firing callback, # probably due to last window being closed. # Run the loop manually in this case, # since there may be events still to process (#9734) CoreFoundation.CFRunLoopRun() Closes

Thomas Kluyver - - Load All Authors

File last commit:

r22707:3a42b331


                r23167:260e9884

Download file

             qt.py
        
                    30 lines
            
             | 1.0 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / IPython / terminal / pt_inputhooks / qt.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      import sys

      from IPython.external.qt_for_kernel import QtCore, QtGui

      # If we create a QApplication, keep a reference to it so that it doesn't get

      # garbage collected.

      _appref = None

      def inputhook(context):

          global _appref

          app = QtCore.QCoreApplication.instance()

          if not app:

              _appref = app = QtGui.QApplication([" "])

          event_loop = QtCore.QEventLoop(app)

          if sys.platform == 'win32':

              # The QSocketNotifier method doesn't appear to work on Windows.

              # Use polling instead.

              timer = QtCore.QTimer()

              timer.timeout.connect(event_loop.quit)

              while not context.input_is_ready():

                  timer.start(50)  # 50 ms

                  event_loop.exec_()

                  timer.stop()

          else:

              # On POSIX platforms, we can use a file descriptor to quit the event

              # loop when there is input ready to read.

              notifier = QtCore.QSocketNotifier(context.fileno(), QtCore.QSocketNotifier.Read)

              notifier.setEnabled(True)

              notifier.activated.connect(event_loop.exit)

              event_loop.exec_()

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				import sys
				from IPython.external.qt_for_kernel import QtCore, QtGui

				# If we create a QApplication, keep a reference to it so that it doesn't get
				# garbage collected.
				_appref = None

				def inputhook(context):
				global _appref
				app = QtCore.QCoreApplication.instance()
				if not app:
				_appref = app = QtGui.QApplication([" "])
				event_loop = QtCore.QEventLoop(app)

				if sys.platform == 'win32':
				# The QSocketNotifier method doesn't appear to work on Windows.
				# Use polling instead.
				timer = QtCore.QTimer()
				timer.timeout.connect(event_loop.quit)
				while not context.input_is_ready():
				timer.start(50) # 50 ms
				event_loop.exec_()
				timer.stop()
				else:
				# On POSIX platforms, we can use a file descriptor to quit the event
				# loop when there is input ready to read.
				notifier = QtCore.QSocketNotifier(context.fileno(), QtCore.QSocketNotifier.Read)
				notifier.setEnabled(True)
				notifier.activated.connect(event_loop.exit)
				event_loop.exec_()