topic GeometryEditor FeedbackLine access in .NET Maps SDK Questions

GeometryEditor FeedbackLine access

DmitriyKolokolnikov — Fri, 27 Sep 2024 07:43:41 GMT

Can I access the FeedbackLine when dragging a node in the GeometryEditor to display, for example, the current polyline length during the drag? Thanks

Re: GeometryEditor FeedbackLine access

GKmieliauskas — Fri, 27 Sep 2024 10:15:36 GMT

Hi,

I think link to another thread could be helpful for you:

Solved: Add GeometryChanged event to the new GeometryEdito... - Esri Community

Re: GeometryEditor FeedbackLine access

DmitriyKolokolnikov — Fri, 27 Sep 2024 13:33:56 GMT

Thank you for the quick response. Unfortunately, this is not quite what I need. I need to obtain the geometry during the process of dragging a vertex. It seems that currently it’s only possible to get the geometry at the end of the dragging, i.e., after releasing the mouse.

Re: GeometryEditor FeedbackLine access

GKmieliauskas — Fri, 27 Sep 2024 14:15:06 GMT

Have you read blog about migrating from SketchEditor -> GeometryEditor inside the thread I mentioned above. Look at the part "Asynchronous start task with geometry result"

Re: GeometryEditor FeedbackLine access

DmitriyKolokolnikov — Fri, 27 Sep 2024 14:57:48 GMT

Yes, I have read that. I can get the geometry, but only after the node dragging is complete. However, I need to get it during the dragging.

Re: GeometryEditor FeedbackLine access

GKmieliauskas — Fri, 27 Sep 2024 18:37:27 GMT

If you need to get it during dragging you need to listen for PropertyChanged event as in sample from thread:

mapView.GeometryEditor.PropertyChanged += (s, e) => { if (e.PropertyName == nameof(mapView.GeometryEditor.Geometry)) { // Geometry has changed } };

Re: GeometryEditor FeedbackLine access

DmitriyKolokolnikov — Sat, 28 Sep 2024 05:47:54 GMT

The PropertyChanged for the GeometryEditor.Geometry property is triggered only after the vertex dragging is completed, i.e., after the mouse button is released.

Re: GeometryEditor FeedbackLine access

HamishDuff — Mon, 30 Sep 2024 14:30:58 GMT

Hi @DmitriyKolokolnikov,

Thank you for your question. Currently you cannot access the FeedbackLine length during a drag action, as you've mentioned it is only possible to retrieve the length after a subsequent vertex has been placed.

I'll make a note of this as a potential enhancement.

Re: GeometryEditor FeedbackLine access

Mike_Quetel — Tue, 01 Oct 2024 15:39:41 GMT

I'd like to register support for this as an enhancement. It sounds like OP and I have similar use cases where we would like to provide continuous feedback (length, area, etc.) about the interim geometry before a vertex is actually placed by the user.

Re: GeometryEditor FeedbackLine access

FelicityRhone — Wed, 13 May 2026 23:33:47 GMT

I also have a use case where getting the geometry of the feedback line would be useful. I guess I can calculate it myself from the mouse position to the current selected vertex, but it would be handy if it was more accessible somehow. I want to show the user a label with the length of the feedback line displayed as they're drawing (among other things). Any update on this as a feature enhancement request, i.e. is the request tracked somewhere?

Re: GeometryEditor FeedbackLine access

FelicityRhone — Wed, 13 May 2026 23:32:20 GMT

Actually my workaround of calculating it myself won't work in the scenario where snapping is being applied, because then the mouse position doesn't match up perfectly with the snapped end of the feedback line 😞

I just started a new topic about this issue.