Rotation Demo
Imports System
Imports System.ComponentModel
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 RotateForm()
Application.Run(myform)
End Sub
End Class
Public Class RotateForm
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.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
'
'RotateForm
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(500, 500)
Me.Name = "RotateForm"
Me.Text = "RotateForm"
End Sub
#End Region
Sub RotateForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim x As Integer = 250
Dim y As Integer = 250
Dim width As Integer = 250
Dim height As Integer = 250
Dim textWidth As Single = g.MeasureString("00", Me.Font).Width
Dim length As Single = 230
Dim textRect As RectangleF = New RectangleF(x + length, y - Me.Font.GetHeight(g) / 2, length, textWidth)
Dim format As StringFormat = New StringFormat()
format.Alignment = StringAlignment.Near
format.LineAlignment = StringAlignment.Center
Dim i As Integer
For i = 0 To 360 Step 10
Dim matrix As Matrix = New Matrix()
matrix.RotateAt(i, New PointF(x, y))
g.Transform = matrix
g.DrawLine(Pens.Black, x, y, x + length, y)
g.DrawString(i.ToString(), Me.Font, Brushes.Black, textRect, format)
Next
End Sub
End Class
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