This graphing technique works in my head, why not in RL?

Alright, I am trying to create a graph that changes every second and just shows a 3 second history. In my head it would make sense to tie it into the T variable (Time in seconds), so I have form1 outputting T to a text box on form2 and then everytime that textbox changes it graphs the new chart.

The reason I am doing the step ladder approach is because I wanted the numbers to appear under the points as they travel.

does this make any sense at all, or am I completely off base?

Imports System.Windows.Forms.DataVisualization.Charting

Public Class Form2

    Dim chart1 As New Chart

    Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

  开发者_运维技巧  Private Sub TextBox11_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox10.TextChanged

        If Form1.T <= 2 Then

            Label1.Visible = False

            TextBox20.Text = TextBox21.Text
            TextBox31.Text = TextBox32.Text

                TextBox21.Text = TextBox22.Text
            TextBox32.Text = TextBox33.Text

            TextBox22.Text = Form1.TextBox10.Text
            TextBox33.Text = Form1.TextBox4.Text

            Dim s1() As Point = {New Point(Form1.T - 2, TextBox20.Text), New Point(Form1.T - 1, TextBox21.Text), New Point(Form1.T, TextBox22.Text)}
            Dim s2() As Point = {New Point(Form1.T - 2, TextBox31.Text), New Point(Form1.T - 1, TextBox32.Text), New Point(Form1.T, TextBox33.Text)}
            For x As Integer = Form1.T - 2 To Form1.T
                chart1.Series(0).Points.Add(x, s1(x).Y)
            Next

            chart1.Series.Add("Series2")

            chart1.Series(0).ChartType = DataVisualization.Charting.SeriesChartType.Line
            chart1.Series(1).ChartType = DataVisualization.Charting.SeriesChartType.Line

            For x As Integer = Form1.T - 2 To Form1.T
                chart1.Series(1).Points.Add(x, s1(x).Y)
            Next

            chart1.Series(0).Label = "PSS"
            chart1.Series(1).Label = "USS"

        End If
    End Sub

End Class

I would move the code from the TextChanged event in to a public sub that takes the T variable as a parameter on the same form. From your first form you can just call the public sub directly without having to worry about using a hidden text box and it's events.

Something along the lines of...

Public Class Form2
     Public sub TimerChange(T as integer)
         ...
     End Sub
End Class

Then in the main form

Dim frm as new Form2
frm.show
frm.TimerChange(T)