How to add first point of edit sketch

BarbaraSchneider2

I want to create a polyline using a Button, not a Tool (see why below ). I use the following code:

 

 

protected override async void OnClick()
{
	try
	{
		var spatialRef = GeometryFunctions.CreateLV95SpatialReference();

		// Get mouse coordinates
		System.Drawing.Point screenPoint = Cursor.Position;
		System.Windows.Point winPoint = new System.Windows.Point(screenPoint.X, screenPoint.Y);

		var cursorPoint = await QueuedTask.Run(() =>
		{
			return MapView.Active.ScreenToMap(winPoint);				
		});

		// Get current sketch
		Polyline existingWbl = await MapView.Active.GetCurrentSketchAsync() as Polyline;

		// Add point to current sketch
		var newWbl = AddPointToPolyline(existingWbl, cursorPoint, spatialRef);
		await MapView.Active.SetCurrentSketchAsync(newWbl);
	}
	catch (Exception ex)
	{
		ProPopupMessage.Error(MiscUtils.GetMethodName(), ex.Message);
	}
}

private Polyline AddPointToPolyline(Polyline polyline, MapPoint newPoint, SpatialReference spatialRef)
{		
	PolylineBuilderEx polylineBuilder = new PolylineBuilderEx(spatialRef);
	polylineBuilder.HasZ = true;

	// Step through all points
	List<MapPoint> newPointList = new List<MapPoint>();
	if (polyline != null)
	{                
        foreach (var existingPoint in polyline.Points)
		{
			newPointList.Add(existingPoint);
		}
	}
	newPointList.Add(newPoint);
		
	// Add polyline part
	polylineBuilder.AddPart(newPointList);
	return polylineBuilder.ToGeometry();	
}

 

 

This code works if there already exists a sketch. If I want to add the first point of the polyline, however, it doesn't show on the stereo map. In ArcObjects, this was possible!

Why do I want to create a polyline using a button instead of a tool? I want to use a button on a 3D mouse (https://pro.arcgis.com/en/pro-app/latest/help/analysis/image-analyst/set-up-the-stereo-mapping-stealth-3d-mouse.htm)

GKmieliauskas

Depending on your testing results I would suggest a little bit to change my first scenario.

Before calling StartSketchAsync execute your dummy tool using FrameworkApplication.SetCurrentToolAsync("<dummy_tool_id>");