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# -*- coding: utf-8 -*-
# Copyright (C) 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/>.
"""
A single App instances holds the signals that are shared among different
frontend UI components. The App also keeps a reference to the backend object
and the signaler get signals from the backend.
"""
from PySide import QtCore, QtGui
from leap.bitmask.config.leapsettings import LeapSettings
from leap.bitmask.backend.backend_proxy import BackendProxy
from leap.bitmask.backend.leapsignaler import LeapSignaler
from leap.bitmask.logs.utils import get_logger
logger = get_logger()
class App(QtGui.QWidget):
# the user has changed which services are enabled for a particular account
# args: account (Account), active services (list of str)
service_selection_changed = QtCore.Signal(object, list)
def __init__(self):
QtGui.QWidget.__init__(self)
self.settings = LeapSettings()
self.backend = BackendProxy()
self.backend.start()
self.signaler = LeapSignaler()
self.signaler.start()
self.soledad_started = False
# periodically check if the backend is alive
self._backend_checker = QtCore.QTimer(self)
self._backend_checker.timeout.connect(self._check_backend_status)
self._backend_checker.start(2000)
def _check_backend_status(self):
"""
TRIGGERS:
self._backend_checker.timeout
Check that the backend is running. Otherwise show an error to the user.
"""
if not self.backend.online:
logger.critical("Backend is not online.")
QtGui.QMessageBox.critical(
self, self.tr("Application error"),
self.tr("There is a problem contacting the backend, please "
"restart Bitmask."))
self._backend_checker.stop()
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