PyQt:计时器不能从另一个线程启动

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)

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1楼 · 发布于 2024-10-01 13:33:37

规则如下：除了运行Qt事件循环的主线程之外，您不能从任何线程调用任何GUI函数。当您看到关于QTimer的错误时，可能是因为GUI中的某个东西在内部使用了一个计时器，它是从另一个线程触发的。在

在您的情况下，最有可能的罪魁祸首是您正在从工作线程操作qgraphicscene。我会尝试重新安排代码主线程重新加载是响应newSnap信号而不是在它之前调用的。在

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