ReferenceCallout Leader

[Anonymous]

What I want to do programatically is create a reference callout with a leader oriented diagonally to the upper right.

My attempt was to use the CreateReferenceCallout method to create a a reference callout and rotate it using ElementTransformUtils.RotateElement. However this rotated the entire element. Additionally I cannot control the leader elbow position.

Judging from the lack of relevant methods in the API docs and a 2015/2016 forum post, it seems that this just isn't possible. Is this correct or is there a way to achieve this?

https://forums.autodesk.com/t5/revit-api-forum/revit-2015-setcropregionshape-of-reference-callout/m-... 

[jeremytammik]

Can you achieve the desired result manually through the user interface?

If so, use RevitLookup and other Revit database exploration tools to observe exactly what changes your manual interactions cause in the model:

• http://thebuildingcoder.typepad.com/blog/2017/01/virtues-of-reproduction-research-mep-settings-ontol...
• http://thebuildingcoder.typepad.com/blog/2013/11/intimate-revit-database-exploration-with-the-python...

With that information in hand, you can set out automating this task.

[Anonymous]

It is easy to achieve in the UI. All you need to do is grab the blue leader points and drag them with your mouse.

The CreateReferenceCallout method returns void and snooping the reference callout just shows an Element. Therefore, it appears there is no clear way of editing the reference callout through the API, unless there is some clever trick. 

I'll try exploring some of the other database tools you linked though Jeremy.

Thank you.