| Aurimas Liutikas | ac5fe7c | 2018-03-06 14:40:53 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package androidx.fragment.app; |
| 17 | |
| 18 | import android.animation.Animator; |
| 19 | import android.graphics.Rect; |
| 20 | import android.transition.TransitionValues; |
| 21 | import android.transition.Visibility; |
| 22 | import android.view.View; |
| 23 | import android.view.ViewGroup; |
| 24 | |
| 25 | import java.util.ArrayList; |
| 26 | |
| 27 | /** |
| 28 | * Visibility transition that tracks which targets are applied to it. |
| 29 | * This transition does no animation. |
| 30 | */ |
| 31 | class TrackingVisibility extends Visibility implements TargetTracking { |
| 32 | public final ArrayList<View> targets = new ArrayList<>(); |
| 33 | private final Rect[] mEpicenter = new Rect[1]; |
| 34 | |
| 35 | @Override |
| 36 | public Animator onAppear(ViewGroup sceneRoot, View view, TransitionValues startValues, |
| 37 | TransitionValues endValues) { |
| 38 | targets.add(endValues.view); |
| 39 | Rect epicenter = getEpicenter(); |
| 40 | if (epicenter != null) { |
| 41 | mEpicenter[0] = new Rect(epicenter); |
| 42 | } else { |
| 43 | mEpicenter[0] = null; |
| 44 | } |
| 45 | return null; |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | public Animator onDisappear(ViewGroup sceneRoot, View view, TransitionValues startValues, |
| 50 | TransitionValues endValues) { |
| 51 | targets.add(startValues.view); |
| 52 | Rect epicenter = getEpicenter(); |
| 53 | if (epicenter != null) { |
| 54 | mEpicenter[0] = new Rect(epicenter); |
| 55 | } else { |
| 56 | mEpicenter[0] = null; |
| 57 | } |
| 58 | return null; |
| 59 | } |
| 60 | |
| 61 | @Override |
| 62 | public ArrayList<View> getTrackedTargets() { |
| 63 | return targets; |
| 64 | } |
| 65 | |
| 66 | @Override |
| 67 | public void clearTargets() { |
| 68 | targets.clear(); |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | public Rect getCapturedEpicenter() { |
| 73 | return mEpicenter[0]; |
| 74 | } |
| 75 | } |
