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package test.smartonet.com.myapplication;

import android.annotation.SuppressLint;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;

import org.w3c.dom.Text;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;

/**
 * zhaohan creat 2019/3/6
 */
public class MainActivity extends AppCompatActivity {
  String TAG = "主程序";
  float mPosX;
  float mPosY;
  float mCurPosX;
  float mCurPosY;
  int offset=10;//偏移量
  int friction = 10;//摩擦力
  final List list = new ArrayList();

  @SuppressLint("ClickableViewAccessibility")
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final PagerScrollView scrollView = findViewById(R.id.main);
    list.add((HorizontalScrollView) findViewById(R.id.hor));
    list.add((HorizontalScrollView) findViewById(R.id.hor1));
    list.add((HorizontalScrollView) findViewById(R.id.hor2));
    list.add((HorizontalScrollView) findViewById(R.id.hor3));
    list.add((HorizontalScrollView) findViewById(R.id.hor4));
    list.add((HorizontalScrollView) findViewById(R.id.hor5));
    list.add((HorizontalScrollView) findViewById(R.id.hor6));



    for(HorizontalScrollView horizontalScrollView:list){
      horizontalScrollView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
          switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
              mPosX = event.getX();
              mPosY = event.getY();
              Log.w(TAG,mPosY+"");
              break;
            case MotionEvent.ACTION_MOVE:
              mCurPosX = event.getX();
              mCurPosY = event.getY();
            case MotionEvent.ACTION_UP:
              if (mCurPosX - mPosX > 0 && (Math.abs(mCurPosX - mPosX) > offset)) {
                int speed = 10;//速度
                int distance = 20;//滑动距离
                if((Math.abs(mCurPosX - mPosX))>50){
                  speed = (int) Math.abs(mCurPosX - mPosX)/friction;
                  distance = (int) Math.abs(mCurPosX - mPosX)/3;//滑动距离
                }
                //向右滑動
                Log.w(TAG,"向右滑动了！");
                while(distance>0) {
                  distance = distance - speed;
                  for(HorizontalScrollView horizontalScrollView:list){
                    horizontalScrollView.smoothScrollBy(distance, 0);
                  }
                }
                return true;//true为屏蔽范围内的其他滑动监听
              } else if (mCurPosX - mPosX < 0 && (Math.abs(mCurPosX - mPosX) > offset)) {
                int speed = 10;//速度
                int distance = 20;//滑动距离
                if((Math.abs(mCurPosX - mPosX))>50){
                  speed = (int) Math.abs(mCurPosX - mPosX)/friction;
                  distance = (int) Math.abs(mCurPosX - mPosX)/3;//滑动距离
                }
                //向左滑动
                Log.w(TAG,"向左滑动了！");
                //改为滑动
                while(distance>0){
                  distance=distance-speed;
                  for(HorizontalScrollView horizontalScrollView:list){
                    horizontalScrollView.smoothScrollBy(-distance,0 );
                  }
                }
                return true;//true为屏蔽范围内的其他滑动监听
              }
              break;
          }
          return true;//true为屏蔽范围内的其他滑动监听
        }
      });
    }
  }
}

class PagerScrollView extends ScrollView {

  private float xDistance, yDistance, xLast, yLast;

  public PagerScrollView(Context context) {
    super(context);
  }

  public PagerScrollView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public PagerScrollView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    switch (ev.getAction()) {
      case MotionEvent.ACTION_DOWN:
        xDistance = yDistance = 0f;
        xLast = ev.getX();
        yLast = ev.getY();
        break;
      case MotionEvent.ACTION_MOVE:
        final float curX = ev.getX();
        final float curY = ev.getY();

        xDistance += Math.abs(curX - xLast);
        yDistance += Math.abs(curY - yLast);
        xLast = curX;
        yLast = curY;

        /**
         * X轴滑动距离大于Y轴滑动距离，也就是用户横向滑动时，返回false，ScrollView不处理这次事件，
         * 让子控件中的TouchEvent去处理，所以横向滑动的事件交由ViewPager处理，
         * ScrollView只处理纵向滑动事件
         */
        if (xDistance > yDistance) {
          return false;
        }
    }

    return super.onInterceptTouchEvent(ev);
  }
}