I already sent this code once, so this is my way to use threads.
*# 'calculate' function is an inside-class thread and main thread use
calculated self.y array*
*import numpy as npimport pyqtgraph as pgimport threadingclass
FuncThread(threading.Thread): def __init__(self,t,*a):
self._t=t self._a=a threading.Thread.__init__(*
*self) def run(self): self._t(*self._a)class MyApp(): def
__init__(self): self.number_of_data_steps = 100000 self.qapp
= pg.mkQApp() self.win = pg.GraphicsWindow() plot1 =
self.win.addPlot() curve = plot1.plot() curve.setPen('r')
x = np.linspace(0, self.number_of_data_steps,
self.number_of_data_steps) self.y = np.linspace(-5, 5,
self.number_of_data_steps) calculating_thread =
FuncThread(self.calculate) calculating_thread.start()
while self.win.isVisible(): curve.setData(x,self.y)
self.qapp.processEvents() def calculate(self): while
self.win.isVisible(): self.y += np.random.random(self.number_*
*of_data_steps) - 0.5 if __name__=='__main__': m =
MyApp()*
On Thu, Jun 1, 2017 at 12:34 PM, Quinty van Dijk <[email protected]>
wrote:
> Hi,
>
> I'm trying to plot data from a drone in an updating scrolling plot. For
> the plotting I use the example code number 3 from this file:
> https://github.com/pyqtgraph/pyqtgraph/blob/develop/
> examples/scrollingPlots.py
>
> Now i want to be able to send commands to the drone while the plots keep
> updating, because that's the data that I want to see.
> Now I figured I need to multi thread using Qt, and got my code form here:
> https://groups.google.com/forum/#!topic/pyqtgraph/haiJsGhxTaQ
>
> But when I start the thread the main thread sleeps. I'm new to this and
> have no idea what's happening, can someone help me?
> Without the the threading the plots work just fine.
>
> This is my code:
>
> import pyqtgraph as pg
> import time
> from pyqtgraph.Qt import QtCore, QtGui
> import numpy as np
> from pyardrone import ARDrone, at
> import thread1
>
> ## Code for plot, copied form example.
> --
>
>
> ## Threading and updating part
>
> def update():
> print("update")
> update_plot_vx()
> update_plot_vy()
> update_plot_vz()
>
>
> class Thread(pg.QtCore.QThread):
> newData = pg.QtCore.Signal(object)
> def run(self):
> thread1
>
> timer = pg.QtCore.QTimer()
> timer.timeout.connect(update)
> timer.start(50)
>
> thread = Thread()
> thread.newData.connect(update) #It might be something with row, but
> removing it doesn't change anything
> thread.start()
>
> # Start Qt event loop unless running in interactive mode or using pyside.
> if __name__ == '__main__':
> import sys
> if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
> QtGui.QApplication.instance().exec_()
>
>
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