VB.Net Tutorial/2D Graphics/Pen Alignment

List all Pen Alignment

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class AlignmentsDemo
   public Shared Sub Main
        Application.Run(New AlignmentsForm)
   End Sub
End class
Public Class AlignmentsForm
    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()
        components = New System.ruponentModel.Container()
        Me.Text = "AlignmentsForm"
    End Sub
#End Region

    Private Sub AlignmentsForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        Dim alignNames As String() = System.Enum.GetNames(GetType(PenAlignment))
        Array.Sort(alignNames)
        Dim x As Integer = 0
        Dim y As Integer = 0
        Dim width As Integer = Me.ClientRectangle.Width
        Dim height As Integer = Me.ClientRectangle.Height
        Dim blackBrush As Brush = Brushes.Black
        Dim redPen As Pen = Pens.Red
        Dim alignName As String
        For Each alignName In alignNames
            Dim pen As Pen = New Pen(Color.White, 13)
            g.DrawEllipse(pen, x + 10, y + 10, width - 20, height - 20)
            g.DrawEllipse(redPen, x + 10, y + 10, width - 20, height - 20)
            Dim format As StringFormat = New StringFormat()
            format.Alignment = StringAlignment.Center
            format.LineAlignment = StringAlignment.Center
            g.DrawString(alignName, Me.Font, blackBrush, New RectangleF(x, y, width, height), format)
            y = y + 15
        Next
    End Sub
End Class

PenAlignment Illustration

Imports System
Imports System.Drawing
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Drawing.Drawing2D
public class PenAlignmentComboBox
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Inherits System.Windows.Forms.Form
    Private penColor As Color = Color.Red
    Dim penWidth As Integer = 5
#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 Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents ComboBox1 As System.Windows.Forms.ruboBox
    Friend WithEvents numericUpDown1 As System.Windows.Forms.NumericUpDown
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents ColorBtn As System.Windows.Forms.Button
    Friend WithEvents Draw As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.ruboBox1 = New System.Windows.Forms.ruboBox
        Me.numericUpDown1 = New System.Windows.Forms.NumericUpDown
        Me.Label3 = New System.Windows.Forms.Label
        Me.ColorBtn = New System.Windows.Forms.Button
        Me.Draw = New System.Windows.Forms.Button
        CType(Me.numericUpDown1, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        "Label1
        "
        Me.Label1.Location = New System.Drawing.Point(8, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(80, 23)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Pen Alignment"
        "
        "Label2
        "
        Me.Label2.Location = New System.Drawing.Point(8, 56)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(72, 23)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "Pen Width"
        "
        "ComboBox1
        "
        Me.ruboBox1.Location = New System.Drawing.Point(96, 16)
        Me.ruboBox1.Name = "ComboBox1"
        Me.ruboBox1.Size = New System.Drawing.Size(121, 21)
        Me.ruboBox1.TabIndex = 2
        Me.ruboBox1.Text = "ComboBox1"
        "
        "numericUpDown1
        "
        Me.numericUpDown1.Location = New System.Drawing.Point(96, 56)
        Me.numericUpDown1.Name = "numericUpDown1"
        Me.numericUpDown1.Size = New System.Drawing.Size(32, 20)
        Me.numericUpDown1.TabIndex = 7
        "
        "Label3
        "
        Me.Label3.Location = New System.Drawing.Point(136, 56)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(56, 23)
        Me.Label3.TabIndex = 8
        Me.Label3.Text = "Pen Color"
        "
        "ColorBtn
        "
        Me.ColorBtn.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(0, Byte), CType(0, Byte))
        Me.ColorBtn.FlatStyle = System.Windows.Forms.FlatStyle.Flat
        Me.ColorBtn.Location = New System.Drawing.Point(192, 56)
        Me.ColorBtn.Name = "ColorBtn"
        Me.ColorBtn.Size = New System.Drawing.Size(24, 16)
        Me.ColorBtn.TabIndex = 9
        "
        "Draw
        "
        Me.Draw.Location = New System.Drawing.Point(56, 104)
        Me.Draw.Name = "Draw"
        Me.Draw.Size = New System.Drawing.Size(120, 40)
        Me.Draw.TabIndex = 10
        Me.Draw.Text = "DrawGraphics"
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(360, 349)
        Me.Controls.Add(Me.Draw)
        Me.Controls.Add(Me.ColorBtn)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.numericUpDown1)
        Me.Controls.Add(Me.ruboBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Pen Alignment and Pen Types Sample"
        CType(Me.numericUpDown1, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        AddPenAlignments()
    End Sub
    Private Sub AddPenAlignments()
        comboBox1.Items.Add(PenAlignment.Center)
        comboBox1.Text = PenAlignment.Center.ToString()
        comboBox1.Items.Add(PenAlignment.Inset)
        comboBox1.Items.Add(PenAlignment.Left)
        comboBox1.Items.Add(PenAlignment.Outset)
        comboBox1.Items.Add(PenAlignment.Right)
    End Sub "AddPenAlignments
    Private Sub Draw_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Draw.Click
        Dim g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        Dim pn1 As New Pen(Color.Blue, 3)
        pn1.Width = CSng(numericUpDown1.Value)
        pn1.Color = ColorBtn.BackColor
        Dim str As String = ComboBox1.Text
        Select Case str
            Case "Center"
                pn1.Alignment = PenAlignment.Center
            Case "Inset"
                pn1.Alignment = PenAlignment.Inset
            Case "Left"
                pn1.Alignment = PenAlignment.Left
            Case "Outset"
                pn1.Alignment = PenAlignment.Outset
            Case "Right"
                pn1.Alignment = PenAlignment.Right
            Case Else
        End Select
        g.DrawRectangle(pn1, 80, 150, 150, 150)
        Dim brush As New LinearGradientBrush(New Rectangle(10, 10, 20, 20), Color.Blue, Color.Green, 45.0F)
        g.FillRectangle(brush, 90, 160, 130, 130)
        pn1.Dispose()
        g.Dispose()
    End Sub
End Class