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我正在用python製作一個Qt GUI，並且出現錯誤：QObject :: startTimer：定時器不能從另一個線程啓動。它發生在我運行readModemSnap方法時。我一直在爲此工作了近一個星期，嘗試了許多不同的設計模式，用於在網絡上發現的Qt線程，但沒有成功。PyQt：定時器不能從另一個線程開始
class ModemScopeWindow(QMainWindow, Ui_ModemScope):
def __init__(self, parent=None):
super(ModemScopeWindow, self).__init__(parent)
# Set up the user interface from Designer.
self.setupUi(self)
self.thread = MainThread()
"""
signal connections
"""
self.thread.newSnap.connect(self.updateScene)
self.thread.updateStatus.connect(self.setStatus)
self.thread.connectionLock.lock()
self.thread.runLock.lock()
self.connect(self.runButton, SIGNAL("clicked()"), self.thread.runLock.unlock, Qt.QueuedConnection)
self.connect(self.connectButton, SIGNAL("clicked()"), self.thread.connectionLock.unlock, Qt.QueuedConnection)
class MainThread(QThread):
newSnap = pyqtSignal(QGraphicsScene)
updateStatus = pyqtSignal(str)
initConnect = pyqtSignal()
def __init__(self, parent = None):
super(MainThread, self).__init__(parent)
self.samples = []
self.connectionLock = QMutex()
self.runLock = QMutex()
self.cliMute = QMutex()
self._displayCrosshairs = True
self._displayGrid = True
self.persistantMode = False
self.sampleDepth = 1
self._currentHaam = "4"
color = QColor(10,255,71)
self.plotPen = QPen(color)
self._leftXscene = -VIEW_SIZE/2
self._topYscene = -VIEW_SIZE/2
self._rightXscene = VIEW_SIZE/2
self._bottomYscene = VIEW_SIZE/2
self._leftXworld = -10.0
self._topYworld = 10.0
self._rightXworld = 10.0
self._bottomYworld = -10.0
self._scene = QGraphicsScene(self._leftXscene, self._topYscene, VIEW_SIZE, VIEW_SIZE, self)
self.start(QThread.HighestPriority)
def run(self):
self.updateStatus.emit("Enter target IP address and press Connect")
self.connectionLock.lock()
self.connectModem()
while(1):
self.runLock.lock()
#compile scene
self.readModemSnap()
self.newSnap.emit(self._scene)
self.runLock.unlock()
def readModemSnap(self):
self.updateStatus.emit("Reading Modem Snap...")
print len(self.samples)
if len(self.samples) >= self.sampleDepth:# and not self.persistantMode:
self.samples.pop(0)
self.cliMute.lock()
temp = cli.getModemSnap()
self.cliMute.unlock()
self.samples.append(temp)
self.cliMute.lock()
modType = cli.modemRead(80)
self.cliMute.unlock()
if((modType | 0x0FFFFFFF) == 0x0FFFFFFF):
modType = "0";
else:
modType = "%x"%modType
modType = str(modType)
modType = "0"
self.updateStatus.emit("Done")
self.refresh()
self._currentHaam = modType[0]
if self._displayGrid:
self.plotModulation(self._currentHaam)
self.handleSnapshotResponse()
self.updateStatus.emit("Ready to Run")
def refresh(self):
#delete scene
items = self._scene.items()
for x in items:
self._scene.removeItem(x)
#repaint the crosshairs
if self._displayCrosshairs:
self.plotLine(-VIEW_SIZE,0,+VIEW_SIZE,0, self.plotPen)
self.plotLine(0, -VIEW_SIZE,0, +VIEW_SIZE, self.plotPen)
self.plotScaleTicks()
#repaint grid
if self._displayGrid:
self.plotModulation(self._currentHaam)
self.newSnap.emit(self._scene)
def handleSnapshotResponse(self):
for x in range(len(self.samples)):
for sample in self.samples[x]:
upper = (sample >> 16) & 0xffff;
lower = sample & 0xffff
if (upper & 0x8000):
upper -= 0x10000
if (lower & 0x8000):
lower -= 0x10000
upper = float(upper)/128.0
lower = float(lower)/128.0
self.plot(upper, lower)
你可以看到我沒有從另一個線程啓動任何線程。我使用main來啓動創建MainThread的UI，該MainThread在構建時自行啓動。當我評論線出來本地化的問題時，我發現它的時候，我在readModemSnap方法中調用self.refresh（）和self.handleSnapshotResponse（）。任何人都可以指出我做錯了什麼？或任何關於QThreading的教程？在此先感謝
多線程GUI很難並且通常毫無意義。你爲什麼試試它？正常模式，可以工作的模式是在後臺線程上運行耗時的任務，但將所有GUI代碼移動到主GUI線程上。 – 2011-05-30 20:58:44
檢查出http://stackoverflow.com/questions/1595649/threading-in-a-pyqt-application-use-qt-threads-or-python-threads，因爲它可能會有所幫助。 – synthesizerpatel 2011-06-02 07:45:17