SESL Material/com.google.android.material.shape/InterpolateOnScrollPositionChangeHelper

InterpolateOnScrollPositionChangeHelper

open class InterpolateOnScrollPositionChangeHelper

Helper class to handle shape interpolation when shaped views enter or exit the window.

Constructors

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constructor(shapedView: View, materialShapeDrawable: MaterialShapeDrawable, containingScrollView: ScrollView)
Instantiate a scroll position helper.

Functions

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open fun setContainingScrollView(containingScrollView: ScrollView)
Set the ScrollView which contains the View being interpolated.
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open fun setMaterialShapeDrawable(materialShapeDrawable: MaterialShapeDrawable)
Set the MaterialShapeDrawable which will be interpolated.
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open fun startListeningForScrollChanges(@NonNull viewTreeObserver: ViewTreeObserver)
Start listening for scroll changes and interpolating based on position.
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open fun stopListeningForScrollChanges(@NonNull viewTreeObserver: ViewTreeObserver)
Stop listening for scroll changes and interpolating based on position.
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open fun updateInterpolationForScreenPosition()
Updates the MaterialShapeDrawable's interpolation based on the View's position in the containing ScrollView.