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- package com.reactnativenavigation.views.element.animators;
-
- import android.animation.TypeEvaluator;
- import android.graphics.Rect;
-
- public class ClipBoundsEvaluator implements TypeEvaluator<Rect> {
- private int fromWidth;
- private int fromHeight;
- private int toWidth;
- private int toHeight;
- private final Rect result = new Rect();
-
- @Override
- public Rect evaluate(float ratio, Rect from, Rect to) {
- sync(from, to);
-
- if (toHeight == fromHeight ) {
- result.bottom = toHeight;
- } else {
- if (toHeight > fromHeight) {
- result.bottom = (int) (toHeight - (toHeight - fromHeight) * (1 - ratio));
- } else {
- result.bottom = (int) (toHeight + (fromHeight - toHeight) * (1 - ratio));
- }
- }
-
- if (toWidth == fromWidth) {
- result.right = toWidth;
- } else {
- if (toWidth > fromWidth) {
- result.right = (int) (toWidth - (toWidth - fromWidth) * (1 - ratio));
- } else {
- result.right = (int) (toWidth + (fromWidth - toWidth) * (1 - ratio));
- }
- }
- return result;
- }
-
- private void sync(Rect from, Rect to) {
- fromWidth = from.right;
- fromHeight = from.bottom;
- toWidth = to.right;
- toHeight = to.bottom;
- }
- }
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