How to add staggered item entrance animation to WinUI ItemsRepeater?

Question

ItemsControl has an ItemContainerTransitions property that supports <EntranceThemeTransition IsStaggeringEnabled="True" />. I want to move to ItemsRepeater for its improved performance with large lists. But ItemsRepeater doesn't seem to provide any bulit-in functionality similar to EntranceThemeTransition. Anyone know how I might achieve a similar animation effect for ItemsRepeater?

Answer 1

As of right now, there only is a preview API without documentation. You can take a look at the WinUI's MUXControlsTestApp that implemented some examples of using the ElementAnimator to create animations here: https://github.com/microsoft/microsoft-ui-xaml/tree/main/dev/Repeater/TestUI/Samples/AnimationSamples