[QGIS-Developer] Calculate area/perimtere/length of polygon/line while editing

[Catania, Luke A ERDC-RDE-GRL-VA CIV]

I need to calculate these values on the fly while I am in an edit session resizing a polygon or a line.  I need the user to see this calculation while they are editing not after the edits are committed. I already have the UI set up to capture after commit, but I need to capture while they are moving vertices and update the values in the UI, so they don't keep editing and then committing just to see if they are close.  I want them to know before they commit.

Any idea how to achieve this?

Luke Catania
US Army ERDC-GRL
JCMS Site Planning Developer

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