Interactive draggable chart

[energiok]

Description

I’d love to have a chart component where users can drag data points directly on the chart to update their values in real time. This would be extremely useful for calibration tasks, “what-if” analyses, and general experimentation with data.

As a reference, the chartjs-plugin-dragdata project demonstrates how this can be done in Chart.js.

Have you provided an initial effort estimate for this issue?

I am no FlowFuse team member

[hotNipi]

I don't think such thing must be feature of base chart node.
But here's one example for you.
https://discourse.nodered.org/t/line-chart-as-schedule-interface-drag-points-to-modify-hourly-values/94839

[bartbutenaers]

Hi just my 2 cents...

I was busy migrating the ui-chart node from ChartJs to Echarts, however that has been paused due to familly stuff.
Had a quick look, and I see here that Echarts offers the possibility to drag datapoints in a chart. So this "might" be possible in the future, whenever the Echarts migration is completed.

Not saying it will become available, because that decision is up to the core developers of this repo.

@energioek perhaps you can explain those use cases a bit more in detail, because that might be useful for others. I can imagine that it is e.g. useful when you want to change in your dashboard some temperature profile, or stuff like that.