重新启动realtime p时pyqtgraph realtime plot中断

Question

因此，在这个程序中，我可以通过更改切片器值来启动Qthread realtime plot，当我将slider值设置为零时，Qthread realtime plot停止绘图。 但有时当我再次尝试重新启动实时绘图时，绘图在短时间内看起来像是中断了，如图所示

在这张图片中，在实际的线图下面有一个单行斜杠

这是我的密码：

用户界面

    from pyqtgraph.Qt import QtCore, QtGui
from PyQt4 import QtCore,QtGui,uic
import sys
import time
from collections import deque
from DynamicThread import DynamicThread
from ThreadRun import ThreadRun

from GUI_ui import Ui_home

class ui(QtGui.QTabWidget):
    akselerasi = 0
    curve = None
    dataGraph = deque(maxlen=20)
    x1 = []
    y1 = []
    aa = False

    def __init__(self,parent = None):
        super(ui,self).__init__(parent = parent)

        self.UiMeja = Ui_home()
        self.UiMeja.setupUi(self)

        self.UiMeja.akselerasi.setMinimum(0)
        self.UiMeja.akselerasi.setMaximum(50)
        self.UiMeja.akselerasi.setValue(0)
        self.UiMeja.akselerasi.valueChanged.connect(self.valueAkselerasi)
        self.UiMeja.akselerasi.sliderReleased.connect(self.getThread)

        self.threadDinamis = DynamicThread()
        self.threadDinamis.dataThread.connect(self.runningDynamic)
        ui.curve = self.UiMejaGetar.graph1.plot(pen=(255,0,0))
        self.UiMeja.graph1.setRange(xRange=None, yRange=[-1, 1 ])
        self.UiMeja.graph1.showGrid(x=True, y=True)
        self.UiMeja.graph1.setMouseEnabled(x=False, y=False)
        self.UiMejaGetar.l1.setText(str(self.UiMejaGetar.akselerasi.value()))

    def getThread(self):

        if self.sender() == self.UiMeja.akselerasi:
            ui.akselerasii = int(self.UiMeja.akselerasi.value())

        if GUI_MejaGetar.akselerasii > 0:
            if ui.aa == True:
                print("second")
                minRange = int(self.UiMeja.akselerasi.value()) * -1
                self.UiMeja.graph1.setRange(xRange=None, yRange=[minRange, int(self.UiMeja.akselerasi.value()) ])
                self.threadDinamis.trigrer(ui.akselerasii)

            else:
                minRange = int(self.UiMeja.akselerasi.value()) * -1
                self.UiMeja.graph1.setRange(xRange=None, yRange=[minRange, int(self.UiMeja.akselerasi.value()) ])
                GUI_MejaGetar.aa = True

                print("first")
                self.threadDinamis.trigrer(GUI_MejaGetar.akselerasii)
                self.threadDinamis.start()
        else:
            self.threadDinamis.stop()
            GUI_MejaGetar.aa = False
            GUI_MejaGetar.dataGraph.clear()
            GUI_MejaGetar.x1 = []
            GUI_MejaGetar.y1 = []

    def runningDynamic(self,generateData):
        #print(generateData['x'])
        GUI_MejaGetar.dataGraph.append({'x': generateData['x'], 'y': generateData['y']})
        GUI_MejaGetar.x1 = [item['x'] for item in GUI_MejaGetar.dataGraph]
        GUI_MejaGetar.y1 = [item['y'] for item in GUI_MejaGetar.dataGraph]
        GUI_MejaGetar.curve.setData(x=GUI_MejaGetar.x1, y=GUI_MejaGetar.y1)


if __name__ == '__main__':

    app = QtGui.QApplication([])
    widget = GUI_MejaGetar()

    widget.show()
    app.exec_()

这是我的线程代码：

动态线程.py

    import time
import sys
from PyQt4 import QtGui, QtCore
from PyQt4.QtCore import QTime, QTimer
from randomMethod import randomMethod

class DynamicThread(QtCore.QThread):
    dataThread = QtCore.pyqtSignal(object)
    dynamicGenerator = randomMethod()
    status = False
    intAkselerasi = 0
    def __init__(self, parent=None):
        QtCore.QThread.__init__(self,parent)
        #self.gui_text = None

    def trigrer(self,num):
        DynamicThread.intAkselerasi = num

    def do_work(self):
        i = 0
        listData = []
        count = 0
        test = 0
        #t = QTime()
        #t.start()
        print("starting.....")

        while DynamicThread.status == True:
            if DynamicThread.intAkselerasi > 0:
                if not listData:
                    value = int(DynamicThread.dynamicGenerator.bits(), 2)
                    dat = value % DynamicThread.intAkselerasi
                    listData.append(dat)
                    count = dat
                else:
                    value = int(DynamicThread.dynamicGenerator.bits(), 2)
                    dat = value % DynamicThread.intAkselerasi

                    if listData[i - 1] < 0:
                        dat = dat * -1
                    test = 0
                    test = count + dat
                    lowLimit = DynamicThread.intAkselerasi * -1
                    if DynamicThread.intAkselerasi > test > lowLimit:
                        count = count + dat
                        listData.append(count)
                    else:
                        if dat < lowLimit:
                            temp = abs(dat)
                            count = count + temp
                            listData.append(temp)
                        else:
                            temp = dat * -1
                            count = count + temp
                            listData.append(temp)
                print(listData[i])
                print("test: ",test)
                print("count: ",count)
                self.dataThread.emit({'x': i,'y':count})
                i = i + 1
                time.sleep(0.1)
            else:
                DynamicThread.status = False
                print("stop")
                break
        print("stoping the process....")

    def run(self):
        self.do_work()

    def start(self):
        DynamicThread.status = True
        super(DynamicThread, self).start()

    def stop(self):
        DynamicThread.status = False

那么，我的代码有什么问题？你知道怎么修吗？谢谢你 （注意：我在raspberry pi 3上运行了这个代码）

Answer 1

为了解决这个问题，我加上

GUI_MejaGetar.dataGraph.clear()
GUI_MejaGetar.x1 = []
GUI_MejaGetar.y1 = []

每次我第一次开始或结束实时循环