Cannot access color properties from ExpressionAnimation

microsoft / microsoft-ui-xaml

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Cannot access color properties from ExpressionAnimation #9393

Open Youssef1313 opened 8 months ago

Youssef1313 commented 8 months ago

Describe the bug

var exp = _visual.Compositor.CreateExpressionAnimation("c1.R");
exp.SetColorParameter("c1", new() { R = 40 });
_visual.StartAnimation("TransformMatrix._42", exp);

An invalid subchannel was specified in the expression.

Steps to reproduce the bug

Expected behavior

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Screenshots

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NuGet package version

None

Windows version

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Additional context

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ChewWorker commented 8 months ago

It appears that you are defining a color animation and then trying to use that to transform a matrix component. That is not supported.

Youssef1313 commented 8 months ago

@ChewWorker It is not really about setting it to transform matrix. But just accessing color channels in general.

ChewWorker commented 5 months ago

@Youssef1313 I'm sorry I don't understand. If it's not really about the transform matrix, why does the repro have the transform matrix in it? Is there still a problem if you eliminate that line?