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#/*##########################################################################
# Copyright (C) 2004-2016 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"
import sys
from PyMca5.PyMcaGui import PyMcaQt as qt
QTVERSION = qt.qVersion()
DEBUG = 0
SOURCE_EVENT = qt.QEvent.User
class SourceEvent(qt.QEvent):
def __init__(self, ddict=None):
if ddict is None:
ddict = {}
self.dict = ddict
qt.QEvent.__init__(self, SOURCE_EVENT)
import time
try:
import thread
except ImportError:
import _thread as thread
import weakref
class QSource(qt.QObject):
sigUpdated = qt.pyqtSignal(object)
def __init__(self):
qt.QObject.__init__(self, None) #no parent
self.surveyDict = {}
self.selections = {}
self._pollTime = 0.7 #700 ms
self.pollerThreadId = None
def setPollTime(self, pollTime):
"""Set polling time (in milliseconds)"""
self._pollTime = max(pollTime * 0.001, 0.001)
return self._pollTime * 1000
def getPollTime(self):
return self._pollTime * 1000
def addToPoller(self, dataObject):
"""Set polling for data object"""
sourceName = dataObject.info['SourceName']
if sourceName != self.sourceName:
raise KeyError("Trying to survey key %s on wrong source %s" % (self.sourceName,dataObject.info['SourceName']))
#that is general to any source
key = dataObject.info['Key']
reference = id(dataObject)
def dataObjectDestroyed(ref, dataObjectKey=key, dataObjectRef=reference):
if DEBUG:
print('data object destroyed, key was %s' % dataObjectKey)
print('data object destroyed, ref was 0x%x' % dataObjectRef)
print("self.surveyDict[key] = ",self.surveyDict[key])
n = len(self.surveyDict[dataObjectKey])
if n > 0:
n = list(range(n))
n.reverse()
for i in n:
if not len(dir(self.surveyDict[dataObjectKey][i])):
del self.surveyDict[dataObjectKey][i]
if len(self.surveyDict[dataObjectKey]) == 0:
del self.surveyDict[dataObjectKey]
if DEBUG:
print("SURVEY DICT AFTER DELETION = ", self.surveyDict)
return
# create a weak reference to the dataObject and we call it dataObjectRef
dataObjectRef=weakref.proxy(dataObject, dataObjectDestroyed)
try:
if dataObjectRef not in self.surveyDict[key]:
self.surveyDict[key].append(dataObjectRef)
self.selections[key].append((id(dataObjectRef), dataObjectRef.info))
except KeyError:
self.surveyDict[key] = [dataObjectRef]
self.selections[key] = [(id(dataObjectRef), dataObjectRef.info)]
except ReferenceError:
if DEBUG:
print("NOT ADDED TO THE POLL dataObject = ", dataObject)
return
if DEBUG:
print("SURVEY DICT AFTER ADDITION = ", self.surveyDict)
if self.pollerThreadId is None:
# start a new polling thread
#print "starting new thread"
self.pollerThreadId = thread.start_new_thread(self.__run, ())
def __run(self):
#print "RUN"
while len(self.surveyDict) > 0:
#for key in self.surveyDict is dangerous
# runtime error: dictionnary changed during iteration
# a mutex is needed
if DEBUG:
print("In loop")
dummy = list(self.surveyDict.keys())
eventsToPost = {}
#for key in self.surveyDict:
for key in dummy:
if key not in eventsToPost:
eventsToPost[key] = []
if self.isUpdated(self.sourceName, key):
if DEBUG:
print(self.sourceName,key,"is updated")
try:
if len(self.surveyDict[key]):
#there are still instances of dataObjects
event = SourceEvent()
event.dict['Key'] = key
event.dict['event'] = 'updated'
event.dict['id'] = self.surveyDict[key]
scanselection = False
if 'scanselection' in self.surveyDict[key][0].info:
scanselection = \
self.surveyDict[key][0].info['scanselection']
if (key == 'SCAN_D') or scanselection:
event.dict['scanselection'] = True
else:
event.dict['scanselection'] = False
eventsToPost[key].append(event)
else:
del self.surveyDict[key]
del self.selections[key]
except KeyError:
if DEBUG:
print("key error in loop")
pass
for key in eventsToPost:
for event in eventsToPost[key]:
qt.QApplication.postEvent(self, event)
qt.QApplication.instance().processEvents()
time.sleep(self._pollTime)
if DEBUG:
print("woke up")
self.pollerThreadId = None
self.selections = {}
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