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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.animation.TimeInterpolator;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
/**
* This transition captures the visibility of target objects before and
* after a scene change and animates any changes by sliding the target
* objects into or out of place.
*
* @hide
*/
public class Slide extends Visibility {
// TODO: Add parameter for sliding factor - it's hard-coded below
private static final TimeInterpolator sAccelerator = new AccelerateInterpolator();
private static final TimeInterpolator sDecelerator = new DecelerateInterpolator();
@Override
public Animator onAppear(ViewGroup sceneRoot,
TransitionValues startValues, int startVisibility,
TransitionValues endValues, int endVisibility) {
View endView = (endValues != null) ? endValues.view : null;
endView.setTranslationY(-2 * endView.getHeight());
ObjectAnimator anim = ObjectAnimator.ofFloat(endView, View.TRANSLATION_Y,
-2 * endView.getHeight(), 0);
anim.setInterpolator(sDecelerator);
return anim;
}
@Override
public Animator onDisappear(ViewGroup sceneRoot,
TransitionValues startValues, int startVisibility,
TransitionValues endValues, int endVisibility) {
View startView = (startValues != null) ? startValues.view : null;
startView.setTranslationY(0);
ObjectAnimator anim = ObjectAnimator.ofFloat(startView, View.TRANSLATION_Y, 0,
-2 * startView.getHeight());
anim.setInterpolator(sAccelerator);
return anim;
}
}
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