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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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 android.transition;
import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.view.View;
import android.view.ViewGroup;
/**
* This transition captures the rotation property of targets before and after
* the scene change and animates any changes.
*
* @hide
*/
public class Rotate extends Transition {
private static final String PROPNAME_ROTATION = "android:rotate:rotation";
@Override
public void captureStartValues(TransitionValues transitionValues) {
transitionValues.values.put(PROPNAME_ROTATION, transitionValues.view.getRotation());
}
@Override
public void captureEndValues(TransitionValues transitionValues) {
transitionValues.values.put(PROPNAME_ROTATION, transitionValues.view.getRotation());
}
@Override
public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues,
TransitionValues endValues) {
if (startValues == null || endValues == null) {
return null;
}
final View view = endValues.view;
float startRotation = (Float) startValues.values.get(PROPNAME_ROTATION);
float endRotation = (Float) endValues.values.get(PROPNAME_ROTATION);
if (startRotation != endRotation) {
view.setRotation(startRotation);
return ObjectAnimator.ofFloat(view, View.ROTATION,
startRotation, endRotation);
}
return null;
}
}
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