content: /*
   *
   *  MIT License
   *
   *  Copyright (c) 2017 Alibaba Group
   *
   *  Permission is hereby granted, free of charge, to any person obtaining a copy
   *  of this software and associated documentation files (the "Software"), to deal
   *  in the Software without restriction, including without limitation the rights
   *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   *  copies of the Software, and to permit persons to whom the Software is
   *  furnished to do so, subject to the following conditions:
   *
   *  The above copyright notice and this permission notice shall be included in all
   *  copies or substantial portions of the Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   *  SOFTWARE.
   *
   */
  
  package com.tmall.ultraviewpager.transformer;
  
  import android.support.v4.view.ViewPager;
  import android.view.View;
  
  /**
   * Created by mikeafc on 15/12/3.
   */
  public class UltraScaleTransformer implements ViewPager.PageTransformer {
      private static final float MIN_SCALE = 0.75f;
  
      @Override
      public void transformPage(View page, float position) {
          final int pageWidth = page.getWidth();
          final float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position));
  
          if (position < 0) { // [-1,0]
              // Scale the page down (between MIN_SCALE and 1)
              page.setScaleX(scaleFactor);
              page.setScaleY(scaleFactor);
  
          } else if (position == 0) {
              page.setScaleX(1);
              page.setScaleY(1);
  
          } else if (position <= 1) { // (0,1]
              // Scale the page down (between MIN_SCALE and 1)
              page.setScaleX(scaleFactor);
              page.setScaleY(scaleFactor);
  
          }
      }
  }
  