| /* |
| * 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; |
| } |
| |
| } |