I also solved this problem. I revised the code as shown below line.
"curveZoom.setData(dataRnd[:ptrDataRnd])" ->
"curveZoom.setData(dataRnd[0:ptrDataRnd])"
I wonder the convention of the numpy array.
The meaning of "dataRnd[:ptrDataRnd]" is to specify range from 0th to
ptrDataRnd. Am I wrong?
Please tell me the truth.
# added lines
def updateZoom():
curveZoom.setData(dataRnd[0:ptrDataRnd])
2016년 6월 20일 월요일 오후 4시 46분 25초 UTC+9, actis oh 님의 말:
>
> I solved this problem with adding "updateZoom()" function.
> Code revised is shown as below.
> And another problem occurred as the console message below.
> What is the reason?
> Would you please help me?
>
> Console message :
>
> *C:\Python27\lib\site-packages\pyqtgraph\graphicsItems\AxisItem.py:841:
> RuntimeWarning: overflow encountered in double_scalars*
> * xScale = -bounds.height() / dif*
> *C:\Python27\lib\site-packages\pyqtgraph\graphicsItems\AxisItem.py:847:
> RuntimeWarning: invalid value encountered in double_scalars*
> * xRange = [x * xScale - offset for x in self.range]*
> *C:\Python27\lib\site-packages\pyqtgraph\graphicsItems\AxisItem.py:871:
> RuntimeWarning: invalid value encountered in double_scalars*
> * x = (v * xScale) - offset*
>
> *Process finished with exit code 0*
>
> Revised code :
>
> # -*- coding: utf-8 -*-
>
> import pyqtgraph as pg
> from pyqtgraph.Qt import QtCore, QtGui
> import numpy as np
> from pyqtgraph.dockarea import *
>
> app = QtGui.QApplication([])
> gui = QtGui.QMainWindow()
> area = DockArea()
> gui.setCentralWidget(area)
> gui.resize(1000,500)
> gui.setWindowTitle("Scroll and Zoomed Plot")
>
> dockCtrl = Dock("Plot Control", size=(200, 500))
> dockCtrl.setFixedWidth(200)
> area.addDock(dockCtrl, 'left')
> winCtrl = pg.LayoutWidget()
> dockCtrl.addWidget(winCtrl)
>
> restartBttn = QtGui.QPushButton("Restart")
> restartBttn.setMinimumSize(100,40)
> winCtrl.addWidget(restartBttn)
>
> def RestartPlot():
> global dataRnd,ptrDataRnd
> timer.stop()
> dataRnd = np.empty(100)
> ptrDataRnd = 0
> timer.start(50)
>
> restartBttn.clicked.connect(RestartPlot)
>
> dockScroll = Dock("Scrolling plot", size=(800,250))
> area.addDock(dockScroll, 'right')
> winScroll = pg.GraphicsWindow()
> dockScroll.addWidget(winScroll)
>
> dockZoom = Dock("Zoomed plot", size=(800,250))
> area.addDock(dockZoom, 'right')
> winZoom = pg.GraphicsWindow()
> dockZoom.addWidget(winZoom)
> area.moveDock(dockScroll, 'top', dockZoom)
>
> plotScroll = winScroll.addPlot()
> plotScroll.setDownsampling(mode='peak')
> plotScroll.setClipToView(True)
> curveScroll = plotScroll.plot()
>
> dataRnd = np.empty(100)
> ptrDataRnd = 0
>
> def updateScroll():
> global dataRnd, ptrDataRnd
> dataRnd[ptrDataRnd] = np.random.normal()
> ptrDataRnd += 1
> if ptrDataRnd >= dataRnd.shape[0]:
> tmp = dataRnd
> dataRnd = np.empty(dataRnd.shape[0] * 2)
> dataRnd[:tmp.shape[0]] = tmp
> curveScroll.setData(dataRnd[:ptrDataRnd])
>
> LinRegionItem = pg.LinearRegionItem([0,100])
> LinRegionItem.setZValue(-10)
> plotScroll.addItem(LinRegionItem)
>
> plotZoom = winZoom.addPlot()
> curveZoom = plotZoom.plot(dataRnd, pen=(255,255,255,200))
>
> def updatePlot():
> plotZoom.setXRange(*LinRegionItem.getRegion(), padding=0)
> def updateRegion():
> LinRegionItem.setRegion(plotZoom.getViewBox().viewRange()[0])
>
> LinRegionItem.sigRegionChanged.connect(updatePlot)
> plotZoom.sigXRangeChanged.connect(updateRegion)
> updatePlot()
>
> # added lines
> def updateZoom():
> curveZoom.setData(dataRnd[:ptrDataRnd])
>
> # update all plots
> def update():
> updateScroll()
> # added lines
>
> updateZoom()
>
> timer = pg.QtCore.QTimer()
> timer.timeout.connect(update)
> timer.start(50)
>
> gui.show()
>
> if __name__ == '__main__':
> import sys
>
> if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
> QtGui.QApplication.instance().exec_()
>
>
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