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.setMargin(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)
Qt.QObject.connect(self.details_button, Qt.SIGNAL("clicked()"),
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)