using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;



namespace mianjian

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void panel1_Paint(object sender, PaintEventArgs e)

        {



            XYLinesFactory.DrawXY(panel1);

            XYLinesFactory.DrawYLine(panel1, 45, 85, 8);

            XYLinesFactory.DrawXLine(panel1,18,4,14);  





        }





        private void textBox1_KeyDown(object sender, KeyEventArgs e)

        {

            if (e.KeyCode == Keys.Enter)

            {

                string[] ss = textBox1.Text.Trim().Split(new char[] { ',' });



                int x = Convert.ToInt32(ss[0]);

                int y = Convert.ToInt32(ss[1]);



                Graphics g = textBox1.CreateGraphics();

                g.FillEllipse(Brushes.Red, new Rectangle(4, 45, x, y));

            }

        }







    }





    class XYLinesFactory

    {

        #region   画出X轴与Y轴

        /// <summary>   

        /// 在任意的panel里画一个坐标，坐标所在的四边形距离panel边52像素   

        /// </summary>   

        /// <param name="pan"></param> 

        public static void DrawXY(Panel pan)

        {

            Graphics g = pan.CreateGraphics();

      &nb