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 RealChart : Form
 {
  private Queue<double> dataQueue = new Queue<double>(100);

  private int curValue = 0;

  private int num = 5;//每次刪除增加幾個點

  public RealChart()
  {
   InitializeComponent();
  }

  /// <summary>
  /// 初始化事件
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void btnInit_Click(object sender, EventArgs e)
  {
   InitChart();
  }

  /// <summary>
  /// 開始事件
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void btnStart_Click(object sender, EventArgs e)
  {
   this.timer1.Start();
  }

  /// <summary>
  /// 停止事件
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void btnStop_Click(object sender, EventArgs e)
  {
   this.timer1.Stop();
  }

  /// <summary>
  /// 定時器事件
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void timer1_Tick(object sender, EventArgs e)
  {
   UpdateQueueValue();
   this.chart1.Series[0].Points.Clear();
   for(int i=0;i<dataQueue.Count;i++){
    this.chart1.Series[0].Points.AddXY((i+1), dataQueue.ElementAt(i));
   }
  }

  /// <summary>
  /// 初始化圖表
  /// </summary>
  private void InitChart() {
   //定義圖表區(qū)域
   this.chart1.ChartAreas.Clear();
   ChartArea chartArea1 = new ChartArea("C1");
   this.chart1.ChartAreas.Add(chartArea1);
   //定義存儲和顯示點的容器
   this.chart1.Series.Clear();
   Series series1 = new Series("S1");
   series1.ChartArea = "C1";
   this.chart1.Series.Add(series1);
   //設置圖表顯示樣式
   this.chart1.ChartAreas[0].AxisY.Minimum = 0;
   this.chart1.ChartAreas[0].AxisY.Maximum =100;
   this.chart1.ChartAreas[0].AxisX.Interval = 5;
   this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver;
   this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver;
   //設置標題
   this.chart1.Titles.Clear();
   this.chart1.Titles.Add("S01");
   this.chart1.Titles[0].Text = "XXX顯示";
   this.chart1.Titles[0].ForeColor = Color.RoyalBlue;
   this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
   //設置圖表顯示樣式
   this.chart1.Series[0].Color = Color.Red;
   if (rb1.Checked)
   {
    this.chart1.Titles[0].Text =string.Format( "XXX {0} 顯示",rb1.Text);
    this.chart1.Series[0].ChartType = SeriesChartType.Line;
   }
   if (rb2.Checked) {
    this.chart1.Titles[0].Text = string.Format("XXX {0} 顯示", rb2.Text);
    this.chart1.Series[0].ChartType = SeriesChartType.Spline;
   }
   this.chart1.Series[0].Points.Clear();
  }

  //更新隊列中的值
  private void UpdateQueueValue() {

   if (dataQueue.Count > 100) {
    //先出列
    for (int i = 0; i < num; i++)
    {
     dataQueue.Dequeue();
    }
   }
   if (rb1.Checked)
   {
    Random r = new Random();
    for (int i = 0; i < num; i++)
    {
     dataQueue.Enqueue(r.Next(0, 100));
    }
   }
   if (rb2.Checked) {
    for (int i = 0; i < num; i++)
    {
     //對curValue只取[0,360]之間的值
     curValue = curValue % 360;
     //對得到的正玄值，放大50倍，并上移50
     dataQueue.Enqueue((50*Math.Sin(curValue*Math.PI / 180))+50);
     curValue=curValue+10;
    }
   }
  }
 }
}