Use data for render from separate thread

[FunnyJingl]

Hi!

I have a some trouble related to update renderer with data generated from separate thread.

Basic code for usage here:

app = QApplication([])

p = pvqt.BackgroundPlotter()
sphere = pv.Sphere(radius=5)
p.add_mesh(mesh=sphere, color="red")

# create thread for feeding data
# A thread that produces data
def producer(out_q):
    while True:
        # Produce some data
        data = np.random.uniform(-5, 5, 1)
        out_q.put(data)
        time.sleep(0.1)

# A thread that consumes data
def consumer(in_q):
    app.exec()

    while True:
        # Get some data
        data = in_q.get()

        # Process the data
        p.update_coordinates(sphere.center + data, mesh=sphere, render=True)

# Create the shared queue and launch both threads
q = Queue()
t1 = Thread(target=consumer, args=(q,))
t2 = Thread(target=producer, args=(q,))
t1.start()
t2.start()

Here main window just freezes while threads are generate and get data. I tried with callback usage, but I confused about point how to send data from another thread to QTWindow. Can you advice some optimal way to do that?