Live updating plot

Real-time plotting that subscribes to data streams and keeps updating: the UpdatingPlot and LivePlot containers.

Overview

quatm/GUI/entries/updating_plot.py provides the live updating plot: UpdatingPlot is a subclass of PlotItem that subscribes to data streams and periodically pulls new data to refresh the curve; LivePlot, by contrast, is a widget container that embeds an UpdatingPlot and can carry an image-stream name, which makes it convenient to embed as a dock panel in other windows.

Components

Component	Description
`UpdatingPlot`	Live plot item: subscribes to data streams and keeps updating the curve
`LivePlot`	Widget container: embeds one `UpdatingPlot` and can carry an image stream

Key methods (UpdatingPlot)

Method	Description
`setnewData`	Periodically pulls new data; for 1D arrays it automatically adds an x axis and then updates the curve
`updateConfiguration`	Cancels the old subscriptions, resubscribes according to the stream list configured in properties and rebuilds the curves
`subscribe_window`	Opens the subscription editor to select data streams and reapply the configuration
`configureWindow`	Opens the property-edit dialog to adjust display settings

Usage

from quatm.GUI.entries.updating_plot import UpdatingPlot, LivePlot

plot = UpdatingPlot(name="PMT signal")        # used directly as a plot item
host = LivePlot(name="PMT signal", parent=parent)  # or embedded as a container in the UI

For a more complete description, see Live plotting.