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.content.Context;
  import android.view.View;
  
  /**
   * An abstract class which defines animators for CardStreamLinearLayout.
   */
  abstract class CardStreamAnimator {
  
      protected float mSpeedFactor = 1.f;
  
      /**
       * Set speed factor of animations. Higher value means longer duration & slow animation.
       *
       * @param speedFactor speed type 1: SLOW, 2: NORMAL, 3:FAST
       */
      public void setSpeedFactor(float speedFactor) {
          mSpeedFactor = speedFactor;
      }
  
      /**
       * Define initial animation of each child which fired when a user rotate a screen.
       *
       * @param context
       * @return ObjectAnimator for initial animation
       */
      public abstract ObjectAnimator getInitalAnimator(Context context);
  
      /**
       * Define disappearing animation of a child which fired when a view is removed programmatically
       *
       * @param context
       * @return ObjectAnimator for disappearing animation
       */
      public abstract ObjectAnimator getDisappearingAnimator(Context context);
  
      /**
       * Define appearing animation of a child which fired when a view is added programmatically
       *
       * @param context
       * @return ObjectAnimator for appearing animation
       */
      public abstract ObjectAnimator getAppearingAnimator(Context context);
  
      /**
       * Define swipe-in (back to the origin position) animation of a child
       * which fired when a view is not moved enough to be removed.
       *
       * @param view   target view
       * @param deltaX delta distance by x-axis
       * @param deltaY delta distance by y-axis
       * @return ObjectAnimator for swipe-in animation
       */
      public abstract ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY);
  
      /**
       * Define swipe-out animation of a child
       * which fired when a view is removing by a user swipe action.
       *
       * @param view   target view
       * @param deltaX delta distance by x-axis
       * @param deltaY delta distance by y-axis
       * @return ObjectAnimator for swipe-out animation
       */
      public abstract ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY);
  
      /**
       * A simple CardStreamAnimator implementation which is used to turn animations off.
       */
      public static class EmptyAnimator extends CardStreamAnimator {
  
          @Override
          public ObjectAnimator getInitalAnimator(Context context) {
              return null;
          }
  
          @Override
          public ObjectAnimator getDisappearingAnimator(Context context) {
              return null;
          }
  
          @Override
          public ObjectAnimator getAppearingAnimator(Context context) {
              return null;
          }
  
          @Override
          public ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY) {
              return null;
          }
  
          @Override
          public ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY) {
              return null;
          }
      }
  
  }
  
  