package it372.drawdots1;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.view.MotionEvent;
import android.view.View;

import java.util.ArrayList;

public class MyView extends View {
    private ArrayList<Point> points;

    public void clearPoints( ) {
        points.clear( );
        invalidate( );
    }

    public MyView(Context c) {
        super(c);
        points = new ArrayList<Point>( );
        this.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent e) {
                if (e.getAction( ) == MotionEvent.ACTION_UP) {
                    points.add(new Point(
                        (int) e.getX( ), (int) e.getY( )));
                 }
                invalidate( );
                return true;
            }
        });
    }

    @Override
    public void onDraw(Canvas c) {
        Paint paint = new Paint( );
        // c.drawColor(Color.parseColor("#e0e0ff"));
        paint.setColor(Color.BLUE);
        int w = getWidth( );
        int h = getHeight( );
        paint.setStrokeWidth(8.0f);
        c.drawLine(0,0, w, 0, paint);
        c.drawLine(w,0, w, h, paint);
        c.drawLine(w, h, 0, h, paint);
        c.drawLine(0,h, 0, 0, paint);
        for(Point p : points) {
            c.drawCircle((float) p.x, (float) p.y, 20, paint);
        }
    }
}