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      1 /*
      2  * Copyright (C) 2017 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.notification;
     18 
     19 import android.view.View;
     20 import android.view.animation.Interpolator;
     21 
     22 import com.android.systemui.Interpolators;
     23 import com.android.systemui.statusbar.CrossFadeHelper;
     24 import com.android.systemui.statusbar.TransformableView;
     25 import com.android.systemui.statusbar.ViewTransformationHelper;
     26 
     27 import static com.android.systemui.statusbar.TransformableView.TRANSFORMING_VIEW_TITLE;
     28 import static com.android.systemui.statusbar.notification.TransformState.TRANSFORM_Y;
     29 
     30 /**
     31  * A custom transformation that modifies the interpolator
     32  */
     33 public abstract class CustomInterpolatorTransformation
     34         extends ViewTransformationHelper.CustomTransformation {
     35 
     36     private final int mViewType;
     37 
     38     public CustomInterpolatorTransformation(int viewType) {
     39         mViewType = viewType;
     40     }
     41 
     42     @Override
     43     public boolean transformTo(TransformState ownState, TransformableView notification,
     44             float transformationAmount) {
     45         if (!hasCustomTransformation()) {
     46             return false;
     47         }
     48         TransformState otherState = notification.getCurrentState(mViewType);
     49         if (otherState == null) {
     50             return false;
     51         }
     52         View view = ownState.getTransformedView();
     53         CrossFadeHelper.fadeOut(view, transformationAmount);
     54         ownState.transformViewFullyTo(otherState, this, transformationAmount);
     55         otherState.recycle();
     56         return true;
     57     }
     58 
     59     protected boolean hasCustomTransformation() {
     60         return true;
     61     }
     62 
     63     @Override
     64     public boolean transformFrom(TransformState ownState,
     65             TransformableView notification, float transformationAmount) {
     66         if (!hasCustomTransformation()) {
     67             return false;
     68         }
     69         TransformState otherState = notification.getCurrentState(mViewType);
     70         if (otherState == null) {
     71             return false;
     72         }
     73         View view = ownState.getTransformedView();
     74         CrossFadeHelper.fadeIn(view, transformationAmount);
     75         ownState.transformViewFullyFrom(otherState, this, transformationAmount);
     76         otherState.recycle();
     77         return true;
     78     }
     79 }
     80