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.content.Context;
  import android.util.AttributeSet;
  import android.view.MotionEvent;
  import android.view.ViewConfiguration;
  import android.widget.RelativeLayout;
  
  /**
   * Custom Button with a special 'pressed' effect for touch events.
   */
  public class CardLayout extends RelativeLayout {
  
      private boolean mSwiping = false;
      private float mDownX = 0.f;
      private float mDownY = 0.f;
      private float mTouchSlop = 0.f;
  
      public CardLayout(Context context) {
          super(context);
          init();
      }
  
      public CardLayout(Context context, AttributeSet attrs) {
          super(context, attrs);
          init();
      }
  
      public CardLayout(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
          init();
      }
  
      private void init(){
          setFocusable(true);
          setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
          setWillNotDraw(false);
          setClickable(true);
  
          mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop() * 2.f;
      }
  
      @Override
      public boolean onTouchEvent(MotionEvent event) {
          switch(event.getAction()){
              case MotionEvent.ACTION_CANCEL:
              case MotionEvent.ACTION_UP:
                  mSwiping = false;
                  break;
          }
          return super.onTouchEvent(event);
      }
  
      @Override
      public boolean onInterceptTouchEvent(MotionEvent event) {
  
          switch(event.getAction()){
              case MotionEvent.ACTION_MOVE:
                  if( !mSwiping ){
                      mSwiping = Math.abs(mDownX - event.getX()) > mTouchSlop;
                  }
                  break;
              case MotionEvent.ACTION_DOWN:
                  mDownX = event.getX();
                  mDownY = event.getY();
                  mSwiping = false;
                  break;
              case MotionEvent.ACTION_CANCEL:
              case MotionEvent.ACTION_UP:
                  mSwiping = false;
                  break;
          }
          return mSwiping;
      }
  }