Source code for taurus.qt.qtgui.display.qfallback

#!/usr/bin/env python

#############################################################################
##
# This file is part of Taurus
##
# http://taurus-scada.org
##
# Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
# Taurus is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
##
# Taurus 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 Lesser General Public License for more details.
##
# You should have received a copy of the GNU Lesser General Public License
# along with Taurus.  If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################

"""A pure Qt widget designed to be displayed when a real widget cannot be
loaded for any reason (example: a dependency library is not installed)"""

__all__ = ["create_fallback", "create_taurus_fallback", "QFallBackWidget",
           "TaurusFallBackWidget"]

__docformat__ = 'restructuredtext'

import sys
import functools
from taurus.external.qt import Qt
from taurus.qt.qtgui.base import TaurusBaseWidget


[docs]def create_fallback(widget_klass_name): return functools.partial(QFallBackWidget, replaces=widget_klass_name, exc_info=sys.exc_info())
[docs]def create_taurus_fallback(widget_klass_name): return functools.partial(TaurusFallBackWidget, replaces=widget_klass_name, exc_info=sys.exc_info())
[docs]class QFallBackWidget(Qt.QWidget): """A FallBack widget to be used when a real widget cannot be loaded for any reason (example: a dependency library is not installed)""" def __init__(self, replaces=None, parent=None, *args, **kwargs): Qt.QWidget.__init__(self, parent) if replaces is None: replaces = self.__class__.__name__ self.replaces = replaces self.exc_info = exc_info = kwargs.get("exc_info") layout = Qt.QVBoxLayout(self) layout.setContentsMargins(2, 2, 2, 2) layout.setSpacing(2) self.setLayout(layout) self.label = Qt.QLabel(self) self.label.setText("'{0}' could not be displayed".format(replaces)) layout.addWidget(self.label, 0, Qt.Qt.AlignVCenter) if exc_info is not None and exc_info[0] is not None: self.details_button = Qt.QPushButton("Details...", self) layout.addWidget(self.details_button, 0, Qt.Qt.AlignTop) self.details_button.clicked.connect(self.onShowDetails) layout.addStretch(1)
[docs] def onShowDetails(self): import taurus.qt.qtgui.dialog msgbox = taurus.qt.qtgui.dialog.TaurusMessageBox(*self.exc_info, parent=self) msgbox.setWindowTitle("{0} Error".format(self.replaces)) msgbox.setText(self.label.text()) msgbox.exec_()
[docs]class TaurusFallBackWidget(QFallBackWidget, TaurusBaseWidget): def __init__(self, replaces=None, parent=None, *args, **kwargs): self.call__init__(QFallBackWidget, replaces=replaces, parent=parent, *args, **kwargs) designMode = kwargs.get("designMode", False) self.call__init__(TaurusBaseWidget, replaces, designMode=designMode)