尝试在PyQt5中打开PyQtGraph窗口

Question

我的OptionsViz类正在单独工作。但是，当我抛出异步内容时，它什么也没显示。为了简洁起见，我需要删除该代码，因此请不要将其丢弃。

from PyQt5.QtWidgets import QApplication, QMainWindow, QDockWidget
from PyQt5 import QtGui, QtCore
# from quamash import QEventLoop, QThreadExecutor
import pyqtgraph as pg
import numpy as np

class OptionViz():

  def __init__(self, app):
    self.app = app

    p = pg.plot()
    p.setWindowTitle('pyqtgraph example: PlotSpeedTest')
    p.setRange(QtCore.QRectF(0, -10, 5000, 20))
    p.setLabel('bottom', 'Index', units='B')
    self.curve = p.plot()
    self.data = np.random.normal(size=(50, 5000))

    timer = QtCore.QTimer()
    timer.timeout.connect(self.update)
    timer.start(0)

  def update(self):
    self.curve.setData(self.data[self.ptr % 10])
    self.app.processEvents()  ## force complete redraw for every plot


async def main():
  app = QApplication([])
  OptionViz(app)


loop = asyncio.get_event_loop()
loop.create_task(main())
loop.run_forever()

Answer 1

import sys
import asyncio
from qasync import QEventLoop
from PyQt5 import QtCore, QtWidgets
import pyqtgraph as pg
import numpy as np


class OptionViz:
    def __init__(self, app):
        self.app = app
        p = pg.plot()
        p.setWindowTitle("pyqtgraph example: PlotSpeedTest")
        p.setRange(QtCore.QRectF(0, -10, 5000, 20))
        p.setLabel("bottom", "Index", units="B")
        self.curve = p.plot()


async def main(viz):
    data = np.random.normal(size=(50, 5000))
    ptr = 0
    while True:
        viz.curve.setData(data[ptr % 10])
        await asyncio.sleep(0.1)
        ptr += 1


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    loop = QEventLoop(app)
    asyncio.set_event_loop(loop)
    viz = OptionViz(app)
    loop.create_task(main(viz))
    loop.run_forever()