Disable animation scrolling to initial position in CarouselView

[jsuarezruiz]

Description of Change

Disable animation scrolling to initial position in CarouselView. With a high number of items, the time to complete the animation is noticeable.

Issues Resolved

• fixes [Bug] CarouselView should not animate an initial Position on Android #11081

API Changes

Added AnimateInitialPosition property to CarouselView.

Platforms Affected

• Core/XAML (all platforms)
• iOS
• Android
• UWP

Behavioral/Visual Changes

None

Before/After Screenshots

Not applicable

Testing Procedure

Launch Core Gallery and navigate to the issue 11081. If the selected Item is the Item 2, directly without animations, the test has passed.

PR Checklist

• Targets the correct branch
• Tests are passing (or failures are unrelated)

[rmarinho]

Why don't you just use AnimatePositionChanges = false ? What if you want the animation on load?

[jsuarezruiz]

Added AnimateInitialPosition property (is not a BindableProperty) to allow in a simple way to manage if the initial position is animated or not. by default, the initial position is not animated.

[jsuarezruiz]

Retarget to 5.0.0

[jsuarezruiz]

@rmarinho Previously, a new bool property was added to the CarouselView to manage if the initial position was animated or not. However, CarouselView has changed a lot and by default the position is set without animation. So this PR only has an example to validate the issue.