1 /* 2 * Copyright (C) 2016 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 17 package com.android.systemui.statusbar; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorListenerAdapter; 21 import android.animation.ValueAnimator; 22 import android.util.ArrayMap; 23 import android.util.ArraySet; 24 import android.view.View; 25 import android.view.ViewGroup; 26 27 import com.android.systemui.Interpolators; 28 import com.android.systemui.R; 29 import com.android.systemui.statusbar.notification.TransformState; 30 import com.android.systemui.statusbar.stack.StackStateAnimator; 31 32 import java.util.Stack; 33 34 /** 35 * A view that can be transformed to and from. 36 */ 37 public class ViewTransformationHelper implements TransformableView { 38 39 private static final int TAG_CONTAINS_TRANSFORMED_VIEW = R.id.contains_transformed_view; 40 41 private ArrayMap<Integer, View> mTransformedViews = new ArrayMap<>(); 42 private ArrayMap<Integer, CustomTransformation> mCustomTransformations = new ArrayMap<>(); 43 private ValueAnimator mViewTransformationAnimation; 44 addTransformedView(int key, View transformedView)45 public void addTransformedView(int key, View transformedView) { 46 mTransformedViews.put(key, transformedView); 47 } 48 reset()49 public void reset() { 50 mTransformedViews.clear(); 51 } 52 setCustomTransformation(CustomTransformation transformation, int viewType)53 public void setCustomTransformation(CustomTransformation transformation, int viewType) { 54 mCustomTransformations.put(viewType, transformation); 55 } 56 57 @Override getCurrentState(int fadingView)58 public TransformState getCurrentState(int fadingView) { 59 View view = mTransformedViews.get(fadingView); 60 if (view != null && view.getVisibility() != View.GONE) { 61 return TransformState.createFrom(view); 62 } 63 return null; 64 } 65 66 @Override transformTo(final TransformableView notification, final Runnable endRunnable)67 public void transformTo(final TransformableView notification, final Runnable endRunnable) { 68 if (mViewTransformationAnimation != null) { 69 mViewTransformationAnimation.cancel(); 70 } 71 mViewTransformationAnimation = ValueAnimator.ofFloat(0.0f, 1.0f); 72 mViewTransformationAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { 73 @Override 74 public void onAnimationUpdate(ValueAnimator animation) { 75 transformTo(notification, animation.getAnimatedFraction()); 76 } 77 }); 78 mViewTransformationAnimation.setInterpolator(Interpolators.LINEAR); 79 mViewTransformationAnimation.setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD); 80 mViewTransformationAnimation.addListener(new AnimatorListenerAdapter() { 81 public boolean mCancelled; 82 83 @Override 84 public void onAnimationEnd(Animator animation) { 85 if (!mCancelled) { 86 if (endRunnable != null) { 87 endRunnable.run(); 88 } 89 setVisible(false); 90 } else { 91 abortTransformations(); 92 } 93 } 94 95 @Override 96 public void onAnimationCancel(Animator animation) { 97 mCancelled = true; 98 } 99 }); 100 mViewTransformationAnimation.start(); 101 } 102 103 @Override transformTo(TransformableView notification, float transformationAmount)104 public void transformTo(TransformableView notification, float transformationAmount) { 105 for (Integer viewType : mTransformedViews.keySet()) { 106 TransformState ownState = getCurrentState(viewType); 107 if (ownState != null) { 108 CustomTransformation customTransformation = mCustomTransformations.get(viewType); 109 if (customTransformation != null && customTransformation.transformTo( 110 ownState, notification, transformationAmount)) { 111 ownState.recycle(); 112 continue; 113 } 114 TransformState otherState = notification.getCurrentState(viewType); 115 if (otherState != null) { 116 ownState.transformViewTo(otherState, transformationAmount); 117 otherState.recycle(); 118 } else { 119 // there's no other view available 120 CrossFadeHelper.fadeOut(mTransformedViews.get(viewType), transformationAmount); 121 } 122 ownState.recycle(); 123 } 124 } 125 } 126 127 @Override transformFrom(final TransformableView notification)128 public void transformFrom(final TransformableView notification) { 129 if (mViewTransformationAnimation != null) { 130 mViewTransformationAnimation.cancel(); 131 } 132 mViewTransformationAnimation = ValueAnimator.ofFloat(0.0f, 1.0f); 133 mViewTransformationAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { 134 @Override 135 public void onAnimationUpdate(ValueAnimator animation) { 136 transformFrom(notification, animation.getAnimatedFraction()); 137 } 138 }); 139 mViewTransformationAnimation.addListener(new AnimatorListenerAdapter() { 140 public boolean mCancelled; 141 142 @Override 143 public void onAnimationEnd(Animator animation) { 144 if (!mCancelled) { 145 setVisible(true); 146 } else { 147 abortTransformations(); 148 } 149 } 150 151 @Override 152 public void onAnimationCancel(Animator animation) { 153 mCancelled = true; 154 } 155 }); 156 mViewTransformationAnimation.setInterpolator(Interpolators.LINEAR); 157 mViewTransformationAnimation.setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD); 158 mViewTransformationAnimation.start(); 159 } 160 161 @Override transformFrom(TransformableView notification, float transformationAmount)162 public void transformFrom(TransformableView notification, float transformationAmount) { 163 for (Integer viewType : mTransformedViews.keySet()) { 164 TransformState ownState = getCurrentState(viewType); 165 if (ownState != null) { 166 CustomTransformation customTransformation = mCustomTransformations.get(viewType); 167 if (customTransformation != null && customTransformation.transformFrom( 168 ownState, notification, transformationAmount)) { 169 ownState.recycle(); 170 continue; 171 } 172 TransformState otherState = notification.getCurrentState(viewType); 173 if (otherState != null) { 174 ownState.transformViewFrom(otherState, transformationAmount); 175 otherState.recycle(); 176 } else { 177 // There's no other view, lets fade us in 178 // Certain views need to prepare the fade in and make sure its children are 179 // completely visible. An example is the notification header. 180 if (transformationAmount == 0.0f) { 181 ownState.prepareFadeIn(); 182 } 183 CrossFadeHelper.fadeIn(mTransformedViews.get(viewType), transformationAmount); 184 } 185 ownState.recycle(); 186 } 187 } 188 } 189 190 @Override setVisible(boolean visible)191 public void setVisible(boolean visible) { 192 if (mViewTransformationAnimation != null) { 193 mViewTransformationAnimation.cancel(); 194 } 195 for (Integer viewType : mTransformedViews.keySet()) { 196 TransformState ownState = getCurrentState(viewType); 197 if (ownState != null) { 198 ownState.setVisible(visible, false /* force */); 199 ownState.recycle(); 200 } 201 } 202 } 203 abortTransformations()204 private void abortTransformations() { 205 for (Integer viewType : mTransformedViews.keySet()) { 206 TransformState ownState = getCurrentState(viewType); 207 if (ownState != null) { 208 ownState.abortTransformation(); 209 ownState.recycle(); 210 } 211 } 212 } 213 214 /** 215 * Add the remaining transformation views such that all views are being transformed correctly 216 * @param viewRoot the root below which all elements need to be transformed 217 */ addRemainingTransformTypes(View viewRoot)218 public void addRemainingTransformTypes(View viewRoot) { 219 // lets now tag the right views 220 int numValues = mTransformedViews.size(); 221 for (int i = 0; i < numValues; i++) { 222 View view = mTransformedViews.valueAt(i); 223 while (view != viewRoot.getParent()) { 224 view.setTag(TAG_CONTAINS_TRANSFORMED_VIEW, true); 225 view = (View) view.getParent(); 226 } 227 } 228 Stack<View> stack = new Stack<>(); 229 // Add the right views now 230 stack.push(viewRoot); 231 while (!stack.isEmpty()) { 232 View child = stack.pop(); 233 if (child.getVisibility() == View.GONE) { 234 continue; 235 } 236 Boolean containsView = (Boolean) child.getTag(TAG_CONTAINS_TRANSFORMED_VIEW); 237 if (containsView == null) { 238 // This one is unhandled, let's add it to our list. 239 int id = child.getId(); 240 if (id != View.NO_ID) { 241 // We only fade views with an id 242 addTransformedView(id, child); 243 continue; 244 } 245 } 246 child.setTag(TAG_CONTAINS_TRANSFORMED_VIEW, null); 247 if (child instanceof ViewGroup && !mTransformedViews.containsValue(child)){ 248 ViewGroup group = (ViewGroup) child; 249 for (int i = 0; i < group.getChildCount(); i++) { 250 stack.push(group.getChildAt(i)); 251 } 252 } 253 } 254 } 255 resetTransformedView(View view)256 public void resetTransformedView(View view) { 257 TransformState state = TransformState.createFrom(view); 258 state.setVisible(true /* visible */, true /* force */); 259 state.recycle(); 260 } 261 262 /** 263 * @return a set of all views are being transformed. 264 */ getAllTransformingViews()265 public ArraySet<View> getAllTransformingViews() { 266 return new ArraySet<>(mTransformedViews.values()); 267 } 268 269 public static abstract class CustomTransformation { 270 /** 271 * Transform a state to the given view 272 * @param ownState the state to transform 273 * @param notification the view to transform to 274 * @param transformationAmount how much transformation should be done 275 * @return whether a custom transformation is performed 276 */ transformTo(TransformState ownState, TransformableView notification, float transformationAmount)277 public abstract boolean transformTo(TransformState ownState, 278 TransformableView notification, 279 float transformationAmount); 280 281 /** 282 * Transform to this state from the given view 283 * @param ownState the state to transform to 284 * @param notification the view to transform from 285 * @param transformationAmount how much transformation should be done 286 * @return whether a custom transformation is performed 287 */ transformFrom(TransformState ownState, TransformableView notification, float transformationAmount)288 public abstract boolean transformFrom(TransformState ownState, 289 TransformableView notification, 290 float transformationAmount); 291 292 /** 293 * Perform a custom initialisation before transforming. 294 * 295 * @param ownState our own state 296 * @param otherState the other state 297 * @return whether a custom initialization is done 298 */ initTransformation(TransformState ownState, TransformState otherState)299 public boolean initTransformation(TransformState ownState, 300 TransformState otherState) { 301 return false; 302 } 303 customTransformTarget(TransformState ownState, TransformState otherState)304 public boolean customTransformTarget(TransformState ownState, 305 TransformState otherState) { 306 return false; 307 } 308 } 309 } 310