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library/src/main/java/com/google/android/material/motion/family/tween/ObjectTween.java
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| /* | ||
| * Copyright 2016-present The Material Motion Authors. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.google.android.material.motion.family.tween; | ||
|
|
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| import android.animation.TimeInterpolator; | ||
| import android.support.annotation.NonNull; | ||
| import android.support.annotation.Nullable; | ||
| import android.view.animation.AccelerateDecelerateInterpolator; | ||
|
|
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| import com.google.android.material.motion.runtime.Performer; | ||
| import com.google.android.material.motion.runtime.Plan; | ||
|
|
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| /** | ||
| * Interpolate an object's {@link TweenProperty} from one value to another. | ||
| */ | ||
| public class ObjectTween<T, V> extends Plan<T> { | ||
|
|
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| /** | ||
| * The property whose value will be tweened. | ||
| */ | ||
| public TweenProperty<? super T, V> property; | ||
|
|
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| /** | ||
| * The duration of the animation in milliseconds. | ||
| */ | ||
| public long duration; | ||
| /** | ||
| * The start delay of the animation in milliseconds. | ||
| */ | ||
| public long delay; | ||
|
|
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| /** | ||
| * An array of objects providing the value of the animation for each keyframe. | ||
| */ | ||
| public V[] values; | ||
|
|
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| /** | ||
| * An optional array that defines the pacing of the animation. Each offset corresponds to its | ||
| * identically-indexed value in the {@link #values} array. Each offset is a floating point | ||
| * number in the range of [0,1] that defines the fraction of the {@link #duration} at which the | ||
| * corresponding value should apply. If null, each value is assumed to be evenly spaced. | ||
| */ | ||
| @Nullable | ||
| public float[] offsets; | ||
|
|
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| /** | ||
| * An optional array that defines the timing functions to be used between any two values. If | ||
| * {@link #values} is of length n, then this should be of length n-1. If null, each timing | ||
| * function is assumed to be linear. | ||
| * <p> | ||
| * These timing functions composes with the {@link #timingFunction overall timing function}. | ||
| */ | ||
| @Nullable | ||
| public TimeInterpolator[] interTimingFunctions; | ||
|
|
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| /** | ||
| * The overall timing function to apply to the animation. If null, the overall timing function | ||
| * is assumed to be {@link AccelerateDecelerateInterpolator}. | ||
| * <p> | ||
| * This timing function composes with the keyframe {@link #interTimingFunctions}. | ||
| */ | ||
| @Nullable | ||
| public TimeInterpolator timingFunction; | ||
|
|
||
| /** | ||
| * Initializes an ObjectTween plan for the given property with the values as the keyframes. | ||
| * <p> | ||
| * If {@code values.length == 1}, the sole value will be treated as the final value. The initial | ||
| * value will be calculated from the target. | ||
| */ | ||
| @SafeVarargs | ||
| protected ObjectTween(TweenProperty<? super T, V> property, long duration, @NonNull V... values) { | ||
| this.property = property; | ||
| this.duration = duration; | ||
| this.values = values; | ||
| } | ||
|
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| @Override | ||
| protected Class<? extends Performer<T>> getPerformerClass() { | ||
| return (Class<? extends Performer<T>>) new TweenPerformer<T>().getClass(); | ||
| } | ||
| } |
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