VB.Net/2D/Rotate
Rotate 45 degrees
<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms
Public Class MainClass
Shared Sub Main() Dim form1 As Form = New Form1() Application.Run(form1) End Sub " ValidationError
End Class
Public Class Form1
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint " Set the font and font antialiasing properties. Me.Font = New Font("Times New Roman", 20, FontStyle.Bold, GraphicsUnit.Pixel) e.Graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit " Draw the original arrow. DrawArrow(e.Graphics, "Arrow") " Rotate 45 degrees. e.Graphics.RotateTransform(45, MatrixOrder.Append) DrawArrow(e.Graphics, "A2") End Sub " Draw an arrow outline containing some text. Private Sub DrawArrow(ByVal gr As Graphics, ByVal txt As String) " Draw the arrow. Dim pts() As Point = { _ New Point(80, 20), _ New Point(120, 20), _ New Point(120, 10), _ New Point(140, 30), _ New Point(120, 50), _ New Point(120, 40), _ New Point(80, 40) _ } gr.FillPolygon(Brushes.White, pts) gr.DrawPolygon(Pens.Black, pts) " Draw the text. Dim layout_rectangle As New RectangleF(80, 20, 50, 20) Dim string_format As New StringFormat string_format.LineAlignment = StringAlignment.Center string_format.Alignment = StringAlignment.Center gr.DrawString(txt, Me.Font, Brushes.Black, _ layout_rectangle, string_format) End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() 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. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.SuspendLayout() " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(292, 273) Me.Name = "Form1" Me.Text = "TransformArrow" Me.ResumeLayout(False) End Sub
End Class
</source>
Rotate Transform Demo
<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing.Text Imports System.Drawing Imports System.Drawing.Drawing2D Public Class MainClass
Shared Sub Main(ByVal args As String()) Dim myform As Form = New Form1() Application.Run(myform) End Sub
End Class
Public Class Form1
Private Sub Form1_Paint(ByVal sender As Object, _ ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint " Scale by a factor of 90. e.Graphics.ScaleTransform(90, 90, MatrixOrder.Append) " Translate to center on the form. e.Graphics.TranslateTransform( _ Me.ClientRectangle.Width \ 2, _ Me.ClientRectangle.Height \ 2, _ MatrixOrder.Append) For i As Integer = 5 To 360 Step 5 " Save the state. Dim graphics_state As GraphicsState = e.Graphics.Save() " Rotate i degrees. e.Graphics.RotateTransform(i, MatrixOrder.Prepend) " Draw a rectangle. e.Graphics.DrawRectangle(New Pen(Color.Black, 0), -1, -1, 1, 1) " Restore the saved state. e.Graphics.Restore(graphics_state) Next i End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() 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. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.SuspendLayout() " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(500, 500) Me.Name = "Form1" Me.Text = "Title" Me.ResumeLayout(False) End Sub
End Class
</source>
Rotation Demo
<source lang="vbnet"> 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 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.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. <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
</source>