Custom ViewBox about pglive HOT 4 CLOSED

Thank you much sir!
I did it. i create a custom viewbox, custom axis, and put them to a plotitem and then put plotitem into plotwidget. I can fully custom all of them. it is so good.

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To answer first part of your question. You can get viewbox by calling viewbox = plot.getViewBox(). But if your aim is to modify mouse events, I would suggest to overload LivePlotWidget with your custom event handlers.
Here is an example (getting ViewBox is there as well):

import signal
from threading import Thread
import pglive.examples_pyqt5 as examples
from pglive.sources.data_connector import DataConnector
from pglive.sources.live_candleStickPlot import LiveCandleStickPlot
from pglive.sources.live_plot_widget import LivePlotWidget
from pyqtgraph import QtCore  # type: ignore

"""
In this example candlestick plot is displayed.
"""
class CustomLivePlotWidget(LivePlotWidget):

    def mouseMoveEvent(self, ev: QtCore.QEvent) -> None:
        super().mouseMoveEvent(ev)
        print("Mouse move:", ev.pos())

    def wheelEvent(self, ev):
        super().wheelEvent(ev)
        print("Mouse wheel:", ev.angleDelta())

win = CustomLivePlotWidget(title="Candlestick Plot @ 10Hz")
plot = LiveCandleStickPlot()
win.addItem(plot)

data_connector = DataConnector(plot, max_points=50, update_rate=10)

# Get viewbox
viewbox = plot.getViewBox()
print(viewbox)

win.show()

Thread(target=examples.candle_generator, args=(data_connector,)).start()
signal.signal(signal.SIGINT, lambda sig, frame: examples.stop())
examples.app.exec()
examples.stop()

Regarding second part of the question. I have to have a look at this. I'm not sure if the numpy array is limiting factor here. I would say it's the drawing part itself, as pglive is plotting all items every time plot is redrawn. Maybe there is some way to optimize it by caching some objects. How many candles do you expect to plot in your app?

You may consider using https://github.com/domarm-comat/pglive#plot-speed-optimizations to limit number of candles by using LiveAxisRange.

I will get back to you with this. I'm a bit busy right now, so please be patient :).

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That's good to hear! You're welcome :).

Do you still have issue with the performance or you manage to optimize it to your liking?

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I am still doing with my project, I will report and ask you if i have a problem. Thank for your time!

from pglive.