VB.Net/GUI/Ruler

Simple Ruler

Imports System
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Text
Imports System.Globalization
Imports System.Text
Imports System.Collections
Public Class MainClass
    
    Shared Sub Main()
        
        Dim myform As Form = New PageUnitsForm()
        Application.Run(myform)
    End Sub
End Class

Public Class PageUnitsForm
    Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
    Public Sub New()
        MyBase.New()
        "This call is required by the Windows Form Designer.
        InitializeComponent()
        "Add any initialization after the InitializeComponent() call
    End Sub
    "Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    Friend WithEvents statusBar1 As System.Windows.Forms.StatusBar
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.statusBar1 = New System.Windows.Forms.StatusBar()
        Me.SuspendLayout()
        "
        "statusBar1
        "
        Me.statusBar1.Location = New System.Drawing.Point(0, 244)
        Me.statusBar1.Name = "statusBar1"
        Me.statusBar1.Size = New System.Drawing.Size(292, 22)
        Me.statusBar1.TabIndex = 1
        Me.statusBar1.Text = "statusBar1"
        "
        "PageUnitsForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.statusBar1})
        Me.Name = "PageUnitsForm"
        Me.Text = "PageUnitsForm"
        Me.ResumeLayout(False)
    End Sub
#End Region
    Sub PaintInInches(ByVal g As Graphics)
        g.PageUnit = GraphicsUnit.Inch
        g.PageScale = 1
        Dim rulerFont As Font = New Font("MS Sans Serif", 8.25F)
        Dim blackPen As Pen = New Pen(Color.Red, 0)
        Dim rulerFontHeight As Single = rulerFont.GetHeight(g)
        Dim rulerRect As RectangleF = New RectangleF(0, 0, 6.5F, rulerFontHeight * 1.5F)
        Dim i As Single
        For i = 1 To 6
            Dim rect As RectangleF = New RectangleF(i - rulerFontHeight, 0, rulerFontHeight * 2, rulerFontHeight)
            Dim format As StringFormat = New StringFormat()
            format.Alignment = StringAlignment.Center
            g.DrawString(i.ToString(), rulerFont, Brushes.Black, rect, format)
        Next
        For i = 0.5 To 6.5 Step 1
            g.DrawLine(blackPen, i, 0, i, rulerFontHeight / 2)
        Next
    End Sub

    Private Sub PageUnitsForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
        PaintInInches(e.Graphics)
    End Sub
    
    Private Function PixelsToInches(ByVal pixels As Single) As Single
        Dim g As Graphics = Me.CreateGraphics()
        Return pixels / g.DpiY
    End Function
    
End Class