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