Mega Code Archive
Ruler
<![CDATA[
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MatrixMarginsDemo
public Shared Sub Main
Application.Run(New MatrixMarginsForm)
End Sub
End class
Public Class MatrixMarginsForm
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.ComponentModel.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"
'
'MatrixMarginsForm
'
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 = "MatrixMarginsForm"
Me.Text = "MatrixMarginsForm"
Me.ResumeLayout(False)
End Sub
#End Region
Private Function InchesToPixels(ByVal inches As Single) As Single
Dim g As Graphics = Me.CreateGraphics()
Return inches * g.DpiY
End Function
Function InchesToPixels(ByVal rect As RectangleF) As RectangleF
Return New RectangleF(InchesToPixels(rect.X), InchesToPixels(rect.Y), InchesToPixels(rect.Width), InchesToPixels(rect.Height))
End Function
Function PixelsToInches(ByVal pixels As Single) As Single
Dim g As Graphics = Me.CreateGraphics
Return pixels / g.DpiY
End Function
Sub PaintInInches(ByVal g As Graphics)
Dim matrix As Matrix = New Matrix()
matrix.Scale(g.DpiX, g.DpiY)
g.Transform = matrix
Dim rulerFont As Font = New Font("MS Sans Serif", 8.25F / g.DpiY)
Dim blackPen As Pen = New Pen(Color.Black, 0)
Dim rulerFontHeight As Single = rulerFont.GetHeight(g)
Dim rulerRect As RectangleF = New RectangleF(0, 0, 6.5F, rulerFontHeight * 1.5F)
g.DrawRectangle(blackPen, rulerRect.X, rulerRect.Y, rulerRect.Width, rulerRect.Height)
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
Sub Margins_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
PaintInInches(e.Graphics)
ShowClientSize()
End Sub
Sub ShowClientSize()
Dim g As Graphics = Me.CreateGraphics
Dim matrix As Matrix = New Matrix()
matrix.Scale(g.DpiX, g.DpiY)
g.Transform = matrix
Dim bottomRight As PointF() = New PointF() {New PointF(Me.ClientSize.Width, Me.ClientSize.Height)}
g.TransformPoints(CoordinateSpace.World, CoordinateSpace.Device, bottomRight)
statusBar1.Text = String.Format("ClientSize= {0} pixels, {1} inches", Me.ClientSize, bottomRight(0))
End Sub
Sub MarginsForm_Resize(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Resize
Me.Invalidate()
End Sub
End Class
]]>