File: CloseEventNotifyingWidget.py

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#/*##########################################################################
# Copyright (C) 2004-2014 V.A. Sole, European Synchrotron Radiation Facility
#
# This file is part of the PyMca X-ray Fluorescence Toolkit developed at
# the ESRF by the Software group.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
#############################################################################*/
__author__ = "V.A. Sole - ESRF Data Analysis"
__contact__ = "sole@esrf.fr"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
from PyMca5.PyMcaGui import PyMcaQt as qt

class HDFInfoCustomEvent(qt.QEvent):
    def __init__(self, ddict):
        if ddict is None:
            ddict = {}
        self.dict = ddict
        qt.QEvent.__init__(self, qt.QEvent.User)

class CloseEventNotifyingWidget(qt.QWidget):
    def __init__(self, parent=None):
        qt.QWidget.__init__(self, parent)
        self._notifyCloseEventToWidget = []

    def notifyCloseEventToWidget(self, widget):
        if widget not in self._notifyCloseEventToWidget:
            self._notifyCloseEventToWidget.append(widget)

    def closeEvent(self, event):
        if len(self._notifyCloseEventToWidget):
            for widget in self._notifyCloseEventToWidget:
                ddict={}
                ddict['event'] = 'closeEventSignal'
                ddict['id']    = id(self)
                newEvent = HDFInfoCustomEvent(ddict)
                qt.QApplication.postEvent(widget,
                                      newEvent)
            self._notifyCloseEventToWidget = []
        return qt.QWidget.closeEvent(self, event)