Thanks! The thing I didn't know was when you import an file in python the
interpreter executes the code in that file. So I added the if __name
=='__main__' to the beginning of the file.
Op donderdag 1 juni 2017 18:03:27 UTC+2 schreef Vasilije Mehandzic:
>
> 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*
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> *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__(*
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> *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]
> <javascript:>> 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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>
>
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