content: /*
  * Copyright 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 com.example.android.batchstepsensor.cardstream;
  
  import android.animation.ObjectAnimator;
  import android.animation.PropertyValuesHolder;
  import android.annotation.TargetApi;
  import android.content.Context;
  import android.graphics.Point;
  import android.os.Build;
  import android.view.View;
  import android.view.WindowManager;
  import android.view.animation.BounceInterpolator;
  
  class DefaultCardStreamAnimator extends CardStreamAnimator {
  
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      @Override
      public ObjectAnimator getDisappearingAnimator(Context context){
  
          ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(new Object(),
                  PropertyValuesHolder.ofFloat("alpha", 1.f, 0.f),
                  PropertyValuesHolder.ofFloat("scaleX", 1.f, 0.f),
                  PropertyValuesHolder.ofFloat("scaleY", 1.f, 0.f),
                  PropertyValuesHolder.ofFloat("rotation", 0.f, 270.f));
  
          animator.setDuration((long) (200 * mSpeedFactor));
          return animator;
      }
  
      @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
      @Override
      public ObjectAnimator getAppearingAnimator(Context context){
  
          final Point outPoint = new Point();
          WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
          wm.getDefaultDisplay().getSize(outPoint);
  
          ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(new Object(),
                  PropertyValuesHolder.ofFloat("alpha", 0.f, 1.f),
                  PropertyValuesHolder.ofFloat("translationY", outPoint.y / 2.f, 0.f),
                  PropertyValuesHolder.ofFloat("rotation", -45.f, 0.f));
  
          animator.setDuration((long) (200 * mSpeedFactor));
          return animator;
      }
  
      @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
      @Override
      public ObjectAnimator getInitalAnimator(Context context){
  
          ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(new Object(),
                  PropertyValuesHolder.ofFloat("alpha", 0.5f, 1.f),
                  PropertyValuesHolder.ofFloat("rotation", 60.f, 0.f));
  
          animator.setDuration((long) (200 * mSpeedFactor));
          return animator;
      }
  
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      @Override
      public ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY){
  
          float deltaXAbs = Math.abs(deltaX);
  
          float fractionCovered = 1.f - (deltaXAbs / view.getWidth());
          long duration = Math.abs((int) ((1 - fractionCovered) * 200 * mSpeedFactor));
  
          // Animate position and alpha of swiped item
  
          ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(view,
                  PropertyValuesHolder.ofFloat("alpha", 1.f),
                  PropertyValuesHolder.ofFloat("translationX", 0.f),
                  PropertyValuesHolder.ofFloat("rotationY", 0.f));
  
          animator.setDuration(duration).setInterpolator(new BounceInterpolator());
  
          return  animator;
      }
  
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      @Override
      public ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY){
  
          float endX;
          float endRotationY;
  
          float deltaXAbs = Math.abs(deltaX);
  
          float fractionCovered = 1.f - (deltaXAbs / view.getWidth());
          long duration = Math.abs((int) ((1 - fractionCovered) * 200 * mSpeedFactor));
  
          endX = deltaX < 0 ? -view.getWidth() : view.getWidth();
          if (deltaX > 0)
              endRotationY = -15.f;
          else
              endRotationY = 15.f;
  
          // Animate position and alpha of swiped item
          return ObjectAnimator.ofPropertyValuesHolder(view,
                  PropertyValuesHolder.ofFloat("alpha", 0.f),
                  PropertyValuesHolder.ofFloat("translationX", endX),
                  PropertyValuesHolder.ofFloat("rotationY", endRotationY)).setDuration(duration);
  
      }
  
  }
  