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Refactor MultiPlotSpeedTest.py

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* Change variable to meaningful name,
* Remove the outdated commented out code.
This commit is contained in:
Billy Su 2018-02-03 10:16:09 +08:00
parent 4ed09ebdf1
commit 81562b0252
1 changed files with 16 additions and 24 deletions
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40
examples/MultiPlotSpeedTest.py
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@ -12,32 +12,27 @@ from pyqtgraph.Qt import QtGui, QtCore
import numpy as np import numpy as np
import pyqtgraph as pg import pyqtgraph as pg
from pyqtgraph.ptime import time from pyqtgraph.ptime import time
#QtGui.QApplication.setGraphicsSystem('raster')
app = QtGui.QApplication([]) app = QtGui.QApplication([])
#mw = QtGui.QMainWindow()
#mw.resize(800,800)
p = pg.plot() plot = pg.plot()
p.setWindowTitle('pyqtgraph example: MultiPlotSpeedTest') plot.setWindowTitle('pyqtgraph example: MultiPlotSpeedTest')
#p.setRange(QtCore.QRectF(0, -10, 5000, 20)) plot.setLabel('bottom', 'Index', units='B')
p.setLabel('bottom', 'Index', units='B')
nPlots = 100 nPlots = 100
nSamples = 500 nSamples = 500
#curves = [p.plot(pen=(i,nPlots*1.3)) for i in range(nPlots)]
curves = [] curves = []
for i in range(nPlots): for idx in range(nPlots):
c = pg.PlotCurveItem(pen=(i,nPlots*1.3)) curve = pg.PlotCurveItem(pen=(idx,nPlots*1.3))
p.addItem(c) plot.addItem(curve)
c.setPos(0,i*6) curve.setPos(0,idx*6)
curves.append(c) curves.append(curve)
p.setYRange(0, nPlots*6) plot.setYRange(0, nPlots*6)
p.setXRange(0, nSamples) plot.setXRange(0, nSamples)
p.resize(600,900) plot.resize(600,900)
rgn = pg.LinearRegionItem([nSamples/5.,nSamples/3.]) rgn = pg.LinearRegionItem([nSamples/5.,nSamples/3.])
p.addItem(rgn) plot.addItem(rgn)
data = np.random.normal(size=(nPlots*23,nSamples)) data = np.random.normal(size=(nPlots*23,nSamples))
@ -46,13 +41,12 @@ lastTime = time()
fps = None fps = None
count = 0 count = 0
def update(): def update():
global curve, data, ptr, p, lastTime, fps, nPlots, count global curve, data, ptr, plot, lastTime, fps, nPlots, count
count += 1 count += 1
#print "---------", count
for i in range(nPlots): for i in range(nPlots):
curves[i].setData(data[(ptr+i)%data.shape[0]]) curves[i].setData(data[(ptr+i)%data.shape[0]])
#print " setData done."
ptr += nPlots ptr += nPlots
now = time() now = time()
dt = now - lastTime dt = now - lastTime
@ -62,13 +56,11 @@ def update():
else: else:
s = np.clip(dt*3., 0, 1) s = np.clip(dt*3., 0, 1)
fps = fps * (1-s) + (1.0/dt) * s fps = fps * (1-s) + (1.0/dt) * s
p.setTitle('%0.2f fps' % fps) plot.setTitle('%0.2f fps' % fps)
#app.processEvents() ## force complete redraw for every plot #app.processEvents() ## force complete redraw for every plot
timer = QtCore.QTimer() timer = QtCore.QTimer()
timer.timeout.connect(update) timer.timeout.connect(update)
timer.start(0) timer.start(0)
## Start Qt event loop unless running in interactive mode. ## Start Qt event loop unless running in interactive mode.
if __name__ == '__main__': if __name__ == '__main__':