/usr/lib/python2.7/dist-packages/pyqtgraph/examples/ScatterPlotSpeedTest.py is in python-pyqtgraph 0.9.10-5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | #!/usr/bin/python
# -*- coding: utf-8 -*-
"""
For testing rapid updates of ScatterPlotItem under various conditions.
(Scatter plots are still rather slow to draw; expect about 20fps)
"""
## Add path to library (just for examples; you do not need this)
import initExample
from pyqtgraph.Qt import QtGui, QtCore, USE_PYSIDE
import numpy as np
import pyqtgraph as pg
from pyqtgraph.ptime import time
#QtGui.QApplication.setGraphicsSystem('raster')
app = QtGui.QApplication([])
#mw = QtGui.QMainWindow()
#mw.resize(800,800)
if USE_PYSIDE:
from ScatterPlotSpeedTestTemplate_pyside import Ui_Form
else:
from ScatterPlotSpeedTestTemplate_pyqt import Ui_Form
win = QtGui.QWidget()
win.setWindowTitle('pyqtgraph example: ScatterPlotSpeedTest')
ui = Ui_Form()
ui.setupUi(win)
win.show()
p = ui.plot
p.setRange(xRange=[-500, 500], yRange=[-500, 500])
data = np.random.normal(size=(50,500), scale=100)
sizeArray = (np.random.random(500) * 20.).astype(int)
ptr = 0
lastTime = time()
fps = None
def update():
global curve, data, ptr, p, lastTime, fps
p.clear()
if ui.randCheck.isChecked():
size = sizeArray
else:
size = ui.sizeSpin.value()
curve = pg.ScatterPlotItem(x=data[ptr%50], y=data[(ptr+1)%50],
pen='w', brush='b', size=size,
pxMode=ui.pixelModeCheck.isChecked())
p.addItem(curve)
ptr += 1
now = time()
dt = now - lastTime
lastTime = now
if fps is None:
fps = 1.0/dt
else:
s = np.clip(dt*3., 0, 1)
fps = fps * (1-s) + (1.0/dt) * s
p.setTitle('%0.2f fps' % fps)
p.repaint()
#app.processEvents() ## force complete redraw for every plot
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(0)
## Start Qt event loop unless running in interactive mode.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
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