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# qsettings.py -- utility functions related to QSettings
#
# Copyright (c) 2014 - 2014 by Wilbert Berendsen
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
Generic helper functions regarding QSettings
"""
from PyQt5.QtCore import QUrl
def get_string_list(settings, key):
"""Makes sure a list of strings is returned for the key.
You can write the value with settings.setValue(key, ['bla', 'bla',]), but
when you need to read the value with settings.value(key, [], str), things
go wrong when an empty list was stored. So please use this function when
reading a list of strings from QSettings.
"""
try:
value = settings.value(key, [], str)
except TypeError:
value = []
else:
if not isinstance(value, list):
if not value:
value = []
else:
value = [value]
return value
def get_url_list(settings, key):
"""Makes sure a list of QUrl instances is returned for the key.
You can write the value with settings.setValue(key, [url, url]), but
when you need to read the value with settings.value(key, [], QUrl), things
go wrong when an empty list was stored. So please use this function when
reading a list of strings from QSettings.
"""
try:
value = settings.value(key, [], QUrl)
except TypeError:
value = []
else:
if isinstance(value, QUrl):
value = []
return value
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