RectEvaluator

public class RectEvaluator implements TypeEvaluator


This evaluator can be used to perform type interpolation between Rect values.

Summary

Public constructors

Construct a RectEvaluator that returns a new Rect on every evaluate call.

Constructs a RectEvaluator that modifies and returns reuseRect in evaluate calls.

Public methods

@Override @NonNull Rect
evaluate(float fraction, @NonNull Rect startValue, @NonNull Rect endValue)

This function returns the result of linearly interpolating the start and end Rect values, with fraction representing the proportion between the start and end values.

Public constructors

RectEvaluator

public RectEvaluator()

Construct a RectEvaluator that returns a new Rect on every evaluate call. To avoid creating an object for each evaluate call, RectEvaluator should be used whenever possible.

RectEvaluator

public RectEvaluator(@NonNull Rect reuseRect)

Constructs a RectEvaluator that modifies and returns reuseRect in evaluate calls. The value returned from evaluate should not be cached because it will change over time as the object is reused on each call.

Parameters
@NonNull Rect reuseRect

A Rect to be modified and returned by evaluate.

Public methods

evaluate

@Override
public @NonNull Rect evaluate(float fraction, @NonNull Rect startValue, @NonNull Rect endValue)

This function returns the result of linearly interpolating the start and end Rect values, with fraction representing the proportion between the start and end values. The calculation is a simple parametric calculation on each of the separate components in the Rect objects (left, top, right, and bottom).

If RectEvaluator was used to construct this RectEvaluator, the object returned will be the reuseRect passed into the constructor.

Parameters
float fraction

The fraction from the starting to the ending values

@NonNull Rect startValue

The start Rect

@NonNull Rect endValue

The end Rect

Returns
@NonNull Rect

A linear interpolation between the start and end values, given the fraction parameter.