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from pyqtgraph.Qt import QtCore, QtGui
class ThreadsafeTimer(QtCore.QObject):
"""
Thread-safe replacement for QTimer.
"""
timeout = QtCore.Signal()
sigTimerStopRequested = QtCore.Signal()
sigTimerStartRequested = QtCore.Signal(object)
def __init__(self):
QtCore.QObject.__init__(self)
self.timer = QtCore.QTimer()
self.timer.timeout.connect(self.timerFinished)
self.timer.moveToThread(QtCore.QCoreApplication.instance().thread())
self.moveToThread(QtCore.QCoreApplication.instance().thread())
self.sigTimerStopRequested.connect(self.stop, QtCore.Qt.QueuedConnection)
self.sigTimerStartRequested.connect(self.start, QtCore.Qt.QueuedConnection)
def start(self, timeout):
isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
if isGuiThread:
#print "start timer", self, "from gui thread"
self.timer.start(timeout)
else:
#print "start timer", self, "from remote thread"
self.sigTimerStartRequested.emit(timeout)
def stop(self):
isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
if isGuiThread:
#print "stop timer", self, "from gui thread"
self.timer.stop()
else:
#print "stop timer", self, "from remote thread"
self.sigTimerStopRequested.emit()
def timerFinished(self):
self.timeout.emit()
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