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# -*- coding: utf-8 -*-
# frontend_app.py
# Copyright (C) 2013, 2014 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import multiprocessing
import signal
import sys
import os
from functools import partial
from PySide import QtCore, QtGui
from leap.bitmask.config import flags
from leap.bitmask.gui import locale_rc # noqa - silence pylint
from leap.bitmask.gui.mainwindow import MainWindow
from leap.bitmask.util import dict_to_flags
import logging
logger = logging.getLogger(__name__)
def signal_handler(window, signum, frame):
"""
Signal handler that quits the running app cleanly.
:param window: a window with a `quit` callable
:type window: MainWindow
:param signum: number of the signal received (e.g. SIGINT -> 2)
:type signum: int
:param frame: current stack frame
:type frame: frame or None
"""
pname = multiprocessing.current_process().name
logger.debug("{0}: SIGNAL #{1} catched.".format(pname, signum))
window.quit()
def run_frontend(options, flags_dict):
"""
Run the GUI for the application.
:param options: a dict of options parsed from the command line.
:type options: dict
:param flags_dict: a dict containing the flag values set on app start.
:type flags_dict: dict
"""
dict_to_flags(flags_dict)
start_hidden = options["start_hidden"]
# We force the style if on KDE so that it doesn't load all the kde
# libs, which causes a compatibility issue in some systems.
# For more info, see issue #3194
if flags.STANDALONE and os.environ.get("KDE_SESSION_UID") is not None:
sys.argv.append("-style")
sys.argv.append("Cleanlooks")
qApp = QtGui.QApplication(sys.argv)
# To test:
# $ LANG=es ./app.py
locale = QtCore.QLocale.system().name()
qtTranslator = QtCore.QTranslator()
if qtTranslator.load("qt_%s" % locale, ":/translations"):
qApp.installTranslator(qtTranslator)
appTranslator = QtCore.QTranslator()
if appTranslator.load("%s.qm" % locale[:2], ":/translations"):
qApp.installTranslator(appTranslator)
# Needed for initializing qsettings it will write
# .config/leap/leap.conf top level app settings in a platform
# independent way
qApp.setOrganizationName("leap")
qApp.setApplicationName("leap")
qApp.setOrganizationDomain("leap.se")
# HACK:
# We need to do some 'python work' once in a while, otherwise, no python
# code will be called and the Qt event loop will prevent the signal
# handlers for SIGINT/SIGTERM to be called.
# see: http://stackoverflow.com/a/4939113/687989
timer = QtCore.QTimer()
timer.start(500) # You may change this if you wish.
timer.timeout.connect(lambda: None) # Let the interpreter run each 500 ms.
window = MainWindow(start_hidden=start_hidden)
sigterm_handler = partial(signal_handler, window)
# ignore SIGINT since app.py takes care of signaling SIGTERM to us.
signal.signal(signal.SIGINT, signal.SIG_IGN)
signal.signal(signal.SIGTERM, sigterm_handler)
sys.exit(qApp.exec_())
if __name__ == '__main__':
run_frontend()
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