| /* |
| * Copyright 2018 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 androidx.fragment.app; |
| |
| import android.animation.Animator; |
| import android.graphics.Rect; |
| import android.transition.TransitionValues; |
| import android.transition.Visibility; |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Visibility transition that tracks which targets are applied to it. |
| * This transition does no animation. |
| */ |
| class TrackingVisibility extends Visibility implements TargetTracking { |
| public final ArrayList<View> targets = new ArrayList<>(); |
| private final Rect[] mEpicenter = new Rect[1]; |
| |
| @Override |
| public Animator onAppear(ViewGroup sceneRoot, View view, TransitionValues startValues, |
| TransitionValues endValues) { |
| targets.add(endValues.view); |
| Rect epicenter = getEpicenter(); |
| if (epicenter != null) { |
| mEpicenter[0] = new Rect(epicenter); |
| } else { |
| mEpicenter[0] = null; |
| } |
| return null; |
| } |
| |
| @Override |
| public Animator onDisappear(ViewGroup sceneRoot, View view, TransitionValues startValues, |
| TransitionValues endValues) { |
| targets.add(startValues.view); |
| Rect epicenter = getEpicenter(); |
| if (epicenter != null) { |
| mEpicenter[0] = new Rect(epicenter); |
| } else { |
| mEpicenter[0] = null; |
| } |
| return null; |
| } |
| |
| @Override |
| public ArrayList<View> getTrackedTargets() { |
| return targets; |
| } |
| |
| @Override |
| public void clearTargets() { |
| targets.clear(); |
| } |
| |
| @Override |
| public Rect getCapturedEpicenter() { |
| return mEpicenter[0]; |
| } |
| } |
