content: /*
   * Copyright (C) 2014 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 androidx.test.ui.app;
  
  import android.content.Context;
  import android.util.AttributeSet;
  import android.view.MotionEvent;
  import android.view.View;
  import androidx.viewpager.widget.ViewPager;
  
  /**
   * Vertical ViewPager which overrides onTouchEvent to swap the MotionEvent
   */
  public class VerticalViewPager extends ViewPager {
  
    public VerticalViewPager(Context context) {
      super(context);
      setPageTransformer(true, new VerticalPageTransformer());
      setOverScrollMode(OVER_SCROLL_NEVER);
    }
  
    public VerticalViewPager(Context context, AttributeSet attrs) {
      super(context, attrs);
      setPageTransformer(true, new VerticalPageTransformer());
      setOverScrollMode(OVER_SCROLL_NEVER);
    }
  
    @Override
    public boolean onTouchEvent(MotionEvent event) {
      event.setLocation(event.getY() * getWidth() / getHeight(),
          event.getX() * getHeight() / getWidth());
      return super.onTouchEvent(event);
    }
  
    /**
     * Vertical PageTransformer which changes the animation for from horizontal to vertical.
     */
    private class VerticalPageTransformer implements ViewPager.PageTransformer {
  
      @Override
      public void transformPage(View  view, float position) {
          view.setTranslationX(-view.getWidth() * position);
          view.setTranslationY(view.getHeight() * position);
      }}
  }
  