package ru.startandroid.develop.p1031multitouch;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.TextView;

public class MainActivity extends Activity implements OnTouchListener {

  StringBuilder sb = new StringBuilder();
  TextView tv;
  int upPI = 0;
  int downPI = 0;
  boolean inTouch = false;
  String result = "";

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    tv = new TextView(this);
    tv.setTextSize(30);
    tv.setOnTouchListener(this);
    setContentView(tv);
  }

  @Override
  public boolean onTouch(View view, MotionEvent event) {
    // событие
    int actionMask = event.getActionMasked();
    // индекс касания
    int pointerIndex = event.getActionIndex();
    // число касаний
    int pointerCount = event.getPointerCount();

    switch (actionMask) {
    case MotionEvent.ACTION_DOWN: // первое касание
      inTouch = true;
    case MotionEvent.ACTION_POINTER_DOWN: // последующие касания
      downPI = pointerIndex;
      break;

    case MotionEvent.ACTION_UP: // прерывание последнего касания
      inTouch = false;
      sb.setLength(0);
    case MotionEvent.ACTION_POINTER_UP: // прерывания касаний
      upPI = pointerIndex;
      break;

    case MotionEvent.ACTION_MOVE: // движение
      sb.setLength(0);

      for (int i = 0; i < 10; i++) {
        sb.append("Index = " + i);
        if (i < pointerCount) {
          sb.append(", ID = " + event.getPointerId(i));
          sb.append(", X = " + event.getX(i));
          sb.append(", Y = " + event.getY(i));
        } else {
          sb.append(", ID = ");
          sb.append(", X = ");
          sb.append(", Y = ");
        }
        sb.append("\r\n");
      }
      break;
    }
    result = "down: " + downPI + "\n" + "up: " + upPI + "\n";

    if (inTouch) {
      result += "pointerCount = " + pointerCount + "\n" + sb.toString();
    }
    tv.setText(result);
    return true;
  }
}