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;
using System.Windows.Forms.DataVisualization.Charting;

namespace WindowsFormsApplication1
{
    public partial class CandleChartTest : Form
    {
        private int _nDays = 60;

        public CandleChartTest()
        {
            InitializeComponent();
            nDaysTextBox.Text = _nDays.ToString();
            cbShowLine.Checked = true;
        }

        private void CandleChartTest_Load(object sender, EventArgs e)
        {
            // Populate series data
            FillData();
        }

        private void FillData()
        {
            Random rand;
            // Use a number to calculate a starting value for 
            // the pseudo-random number sequence
            rand = new Random();

            // The number of days for stock data
            int period = _nDays;
            try
            {
                period = Convert.ToInt32(nDaysTextBox.Text);
            }
            catch
            {
                // bad data entered use default data and reset textbox data
                period = _nDays;
                nDaysTextBox.Text = _nDays.ToString();
            }

            // The first High value
            double high = rand.NextDouble() * 40;

            // The first Close value
            double close = high - rand.NextDouble();
            // Close can not be less than zero
            if (close < 0.0)
                close = 0.0;

            // The first Low value
            double low = close - rand.NextDouble();
            // Low can not be less than zero
            if (low < 0.0)
                low = 0.0;

            // The first Open value
            double open = (high - low) * rand.NextDouble() + low;

            // The first day X and Y values
            chart1.Series["Price"].Points.AddXY(DateTime.Parse("1/2/2002"), high);
            chart1.Series["Price"].Points[0].YValues[1] = low;

            // The Open value is not used.
            chart1.Series["Price"].Points[0].YValues[2] = open;
            chart1.Series["Price"].Points[0].YValues[3] = close;

            // Begin with the line chart
            chart1.Series["Close"].Points.AddXY(DateTime.Parse("1/2/2002"), close);

            // Days loop
            for (int day = 1; day <= period; day++)
            {

                // Calculate High, Low and Close values
                high = chart1.Series["Price"].Points[day - 1].YValues[2] + rand.NextDouble();

                close = high - rand.NextDouble();
                // Close can not be less than zero
                if (close < 0.0)
                    close = 0.0;

                low = close - rand.NextDouble();
                // Low can not be less than zero
                if (low < 0.0)
                    low = 0.0;

                open = (high - low) * rand.NextDouble() + low;

                // The low cannot be less than yesterday close value.
                //if (low > chart1.Series["Price"].Points[day - 1].YValues[2])
                //    low = chart1.Series["Price"].Points[day - 1].YValues[2];

                // Set data points values
                chart1.Series["Price"].Points.AddXY(day, high);
                chart1.Series["Price"].Points[day].XValue = chart1.Series["Price"].Points[day - 1].XValue + 1;
                chart1.Series["Price"].Points[day].YValues[1] = low;
                chart1.Series["Price"].Points[day].YValues[2] = open;
                chart1.Series["Price"].Points[day].YValues[3] = close;

                // Set data point for line chart
                chart1.Series["Close"].Points.AddXY(day, close);
                chart1.Series["Close"].Points[day].XValue = chart1.Series["Close"].Points[day - 1].XValue + 1;

            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Clear the populate series data
            chart1.Series["Price"].Points.Clear();
            chart1.Series["Close"].Points.Clear();
            FillData();
        }

        private void cbShowLine_CheckedChanged(object sender, EventArgs e)
        {
            if (cbShowLine.Checked)
            {
                chart1.Series["Close"].Enabled = true;
            }
            else
            {
                chart1.Series["Close"].Enabled = false;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            (new InteractiveChart()).Show();
        }

    }
}