I am using pyqtgraph for real-time data plotting. Unfortunately, the library does not support time series real-time plotting, so I went googling and found someone that had written specific classes for that (you can find it here). I used these classes once with no problem at all, but now python instantly crashes upon call of the 'TimeSeriesPlot()' class. I tried to delete all .pyc files in the python folder and all subfolders, but that did not change anything, neither did a repair of the python install. Any ideas as to what causes the problem and how to solve it? Has anyone been confronted to that sort of problem?
My configuration is:
- Windows 7 Home Edition Blockquote
- Python 2.7.5
- Pyside 1.1.2 with QT 4.8
- PyQtGraph 0.9.7
Here is the content of the file I have been trying to execute:
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pyqtgraph as pg
class TimeSeriesPlotViewBox(pg.ViewBox):
def __init__(self, timeSeriesPlot, *args, **kwds):
pg.ViewBox.__init__(self, *args, **kwds)
self.timeSeriesPlot = timeSeriesPlot
def mouseClickEvent(self, ev):
if ev.button() == QtCore.Qt.RightButton:
self.timeSeriesPlot.xFrom = None
self.timeSeriesPlot.xTo = None
self.timeSeriesPlot.updateView()
self.enableAutoRange(pg.ViewBox.XAxis,1.0)
self.enableAutoRange(pg.ViewBox.YAxis,1.0)
def mouseDoubleClickEvent(self, ev):
if ev.button() == QtCore.Qt.LeftButton:
xFrom = 0
if not self.timeSeriesPlot.xFrom is None and self.timeSeriesPlot.xFrom < 0:
xFrom = self.timeSeriesPlot.xFrom
else:
xFrom = -len(self.timeSeriesPlot.timedata)
self.timeSeriesPlot.xFrom = int(round(xFrom / 2.0))
self.timeSeriesPlot.updateView()
self.enableAutoRange(pg.ViewBox.XAxis,1.0)
self.enableAutoRange(pg.ViewBox.YAxis,1.0)
def mouseDragEvent(self, ev):
if ev.button() == QtCore.Qt.RightButton:
ev.ignore()
else:
pg.ViewBox.mouseDragEvent(self, ev)
class TimeSeriesPlot(pg.QtCore.QObject):
def __init__(self, tsTitle, parent = None):
pg.QtCore.QObject.__init__(self, parent)
self.vb =TimeSeriesPlotViewBox(self)
self.plt = pg.PlotWidget(viewBox=self.vb, title = tsTitle)
self.vb.sigRangeChangedManually.connect(self.zoom)
#time axis
self.timedata = []
#val data
self.valdata = []
self.curveVal = pg.PlotDataItem([])
self.plt.addItem(self.curveVal)
self.xFrom = -50
self.xTo = None
def zoom(self):
xlimits,ylimits = self.vb.viewRange()
import bisect
self.xFrom = bisect.bisect_left(self.timedata,xlimits[0])
self.xTo = bisect.bisect_right(self.timedata,xlimits[1])
self.vb.disableAutoRange(pg.ViewBox.XAxis)
self.vb.disableAutoRange(pg.ViewBox.YAxis)
self.updateView()
def show(self):
self.plt.show()
def updateModel(self,newdata):
time = float(newdata["time"])
val = float(newdata["val"])
self.timedata.append(time)
self.valdata.append(val)
def updateView(self):
useAA = True
viewSlice = None
maxElementCnt = 500.0
if self.xFrom is None and self.xTo is None:
elementCnt = len(self.timedata)
step = max(int(round(elementCnt / maxElementCnt)),1)
viewSlice = slice(-elementCnt,None,step)
elif self.xFrom < 0:
elementCnt = -self.xFrom
step = max(int(round(elementCnt / maxElementCnt)),1)
viewSlice = slice(-elementCnt,None,step)
else:
elementCnt = self.xTo - self.xFrom
step = max(int(round(elementCnt / maxElementCnt)),1)
viewSlice = slice(self.xFrom,self.xTo,step)
useAA = True
self.curveVal.setData(x=self.timedata[viewSlice],y=self.valdata[viewSlice],clear=True,antialias=useAA)
####################################
TimeSeriesPlot('plot')