Docs on IAnimationObject and CompositionAnimation.SetExpressionReferenceParameter

[trympet]

Issue Type

[ ] Bug Report
[ ] Feature Request
[ ] Sample request
[x] Documentation issue or request
[ ] Other – Please describe:

Request

There are no proper docs on IAnimationObject nor CompositionAnimation.SetExpressionReferenceParameter. What scenario are these intended to support?

[raymond-wh-leung]

Thanks for posting the question. IAnimationObject is to allow a custom object (that is backed by composition objects) to participate in ExpressionAnimations, by redirecting its properties to the underlying composition object.

The doc has been updated at:

• https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.composition.ianimationobject?view=windows-app-sdk-1.2&branch=main
• https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.composition.compositionanimation.setexpressionreferenceparameter?view=windows-app-sdk-1.2&branch=main

[trympet]

Very cool, thanks Raymond! 😊