65 lines
2.2 KiB
Java
65 lines
2.2 KiB
Java
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/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.transition;
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import android.animation.Animator;
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import android.animation.ObjectAnimator;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.view.View;
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import android.view.ViewGroup;
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/**
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* This transition captures the rotation property of targets before and after
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* the scene change and animates any changes.
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*
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* @hide
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*/
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public class Rotate extends Transition {
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private static final String PROPNAME_ROTATION = "android:rotate:rotation";
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@Override
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public void captureStartValues(TransitionValues transitionValues) {
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transitionValues.values.put(PROPNAME_ROTATION, transitionValues.view.getRotation());
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}
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@Override
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public void captureEndValues(TransitionValues transitionValues) {
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transitionValues.values.put(PROPNAME_ROTATION, transitionValues.view.getRotation());
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}
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@Nullable
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@Override
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public Animator createAnimator(@NonNull ViewGroup sceneRoot,
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@Nullable TransitionValues startValues,
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@Nullable TransitionValues endValues) {
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if (startValues == null || endValues == null) {
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return null;
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}
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final View view = endValues.view;
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float startRotation = (Float) startValues.values.get(PROPNAME_ROTATION);
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float endRotation = (Float) endValues.values.get(PROPNAME_ROTATION);
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if (startRotation != endRotation) {
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view.setRotation(startRotation);
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return ObjectAnimator.ofFloat(view, View.ROTATION,
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startRotation, endRotation);
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}
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return null;
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}
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}
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