How to subscribe changes of Microsoft.UI.Xaml.Application.Current.Resources?

[MartyIX]

Hi,

I noticed that these calls on MAUI's side takes 1-2 ms every time and it adds up over time and I would like to optimize it.

Is is possible to listen to changes of Microsoft.UI.Xaml.Application.Current.Resources (documentation)?

I have found there is RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback) but I'm not sure if it really is what I'm looking for. If it is, I'm still not sure how to listen if ContentControlThemeFontFamily (see) or ControlContentThemeFontSize got changed.

Would anyone know please?

Thank you

[MartyIX]

@codendone I created the dotnet/maui#22782 PR, it's a very small change. Perhaps somebody from the WinUI team could chime in with a helpful comment.