package com.bawei.myapplication.gesture;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

/**

• 這裡是手勢拖動

• @author hasee
  */
  public class CustomGestureView extends View{
  Paint mPaint;
  float mTouchX = 300, mTouchY = 300, mCircleRadius = 50;

  public CustomGestureView(Context context) {
  super(context);
  init();
  }

  public CustomGestureView(Context context, @Nullable AttributeSet attrs) {
  super(context, attrs);
  init();
  }
  private void init() {
  mPaint = new Paint();
  mPaint.setColor(Color.RED);
  mPaint.setStrokeWidth(10);
  mPaint.setStyle(Paint.Style.FILL);

   //監聽touch事件
   setOnTouchListener(new OnTouchListener() {
       @Override
       public boolean onTouch(View v, MotionEvent event) {
  
           //獲取點選位置
           mTouchX = event.getX();
           mTouchY = event.getY();
  
           //重新整理view
           invalidate();
  
           return true;
       }
   });
  

  }

  @Override
  protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  //畫圓
  //第一個引數，圓心x軸位置
  //第二個引數，圓心y軸位置
  //第三個引數，圓形半徑
  //第四個引數，畫筆
  canvas.drawCircle(mTouchX, mTouchY, mCircleRadius, mPaint);
  }
  }