package com.x;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;

public class android extends Activity {
 
 NaviImageView nImageView;
 
 
 final static float STEP = 200;
 float mRatio = 1.0f;
 int mBaseDist;
 float mBaseRatio;
 NaviImageView mImg;
 
 
    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
//    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        
//        requestWindowFeature(Window.FEATURE_NO_TITLE);
        
        Log.i("gu","1");
        nImageView.setBackgroundColor(Color.WHITE); 
        Log.i("gu","2");
        nImageView = new NaviImageView(this);
        Log.i("gu","3");
        nImageView.setBitmap( BitmapFactory.decodeResource(getResources(), R.drawable.school_bus));
        Log.i("gu","4");
        mImg=nImageView;
        Log.i("gu","5");
         setContentView(nImageView);
    }
     class NaviImageView extends View {
 /** 이미지 **/
     public Bitmap image = null;
     
     private float startX = 0;
     private float startY = 0;
     
     private float userX = 0;
     private float userY = 0;
     
     final static int TOUCH_TOLERANCE = 4;
     
     public NaviImageView(Context context) {
      super(context);
     }
     public NaviImageView(Context context, AttributeSet attrs) {
      super(context, attrs);
     }
     public NaviImageView(Context context, AttributeSet attrs, int defStyle) {
      super(context, attrs, defStyle);
     }
     public void setBitmap(Bitmap temp) {

      image = temp;
      userX = 0;
      userY = 0;
//      userX = (image.getWidth() - getWindowManager().getDefaultDisplay().getWidth())/ -2;
//      userY = (image.getHeight() - getWindowManager().getDefaultDisplay().getHeight())/ -2;
     }
     protected void onDraw(Canvas canvas) {
      if ( image != null)
    canvas.drawBitmap(image,  userX,  userY, null);
     }
     public boolean onTouchEvent(MotionEvent event) {
      float x = event.getX();
      float y = event.getY();
      switch ( event.getAction() ) {
      case MotionEvent.ACTION_DOWN:
       setUserNavi(x, y);
       break;
      case MotionEvent.ACTION_MOVE:
       processNavi(x, y);
    setUserNavi(x, y);
    invalidate();
       break;
      case MotionEvent.ACTION_UP:
       clearStartPoint();
       invalidate();
       break;
      }
      return true;
     }
     private void processNavi(float x, float y) {
      if( Math.abs( (startX - x)) > TOUCH_TOLERANCE || 
        Math.abs( (startY - y) ) > TOUCH_TOLERANCE ) {
       if ( startX > x )
     userX -= (startX - x );
    else
     userX += ( x - startX );
    if ( startY < y) 
     userY += ( y - startY );
    else 
     userY -= (startY - y);
   }
     }
     private void setUserNavi(float x, float y) {
      startX = x; startY = y;
     }
     private void clearStartPoint() {
      startX = startY = 0;
     }
     
     public boolean onTouchEvent1(MotionEvent event) {
      if (event.getPointerCount() == 2) {
       int action = event.getAction();
       int pureaction = action & MotionEvent.ACTION_MASK;
       if (pureaction == MotionEvent.ACTION_POINTER_DOWN) {
        mBaseDist = getDistance(event);
        mBaseRatio = mRatio;
       } else {
        float delta = (getDistance(event) - mBaseDist) / STEP;
        float multi = (float)Math.pow(2, delta);
        mRatio = Math.min(1024.0f, Math.max(0.1f, mBaseRatio * multi));

        Matrix m = new Matrix();
        m.postScale(mRatio, mRatio);
        mImg.setImageMatrix(m);
       
        
       }
      }
      return true; 
     }

     private void setImageMatrix(Matrix m) {
   // TODO Auto-generated method stub
   
  }
  int getDistance(MotionEvent event) {
      int dx = (int)(event.getX(0) - event.getX(1));
      int dy = (int)(event.getY(0) - event.getY(1));
      return (int)(Math.sqrt(dx * dx + dy * dy));
     }
     
     
     
     
    }
}