ComboBox Cell renderer : ComboBox « GUI « VB.Net Tutorial

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VB.Net Tutorial » GUI » ComboBox 
14.6.7.ComboBox Cell renderer
ComboBox Cell renderer
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected 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.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()
        Me.XButton = New System.Windows.Forms.Button
        Me.ColorList = New System.Windows.Forms.ComboBox
        Me.SuspendLayout()
        '
        'XButton
        '
        Me.XButton.Location = New System.Drawing.Point(11224)
        Me.XButton.Name = "XButton"
        Me.XButton.Size = New System.Drawing.Size(7523)
        Me.XButton.TabIndex = 0
        Me.XButton.Text = "Button1"
        Me.XButton.UseVisualStyleBackColor = True
        '
        'ColorList
        '
        Me.ColorList.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed
        Me.ColorList.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList
        Me.ColorList.FormattingEnabled = True
        Me.ColorList.Location = New System.Drawing.Point(8864)
        Me.ColorList.Name = "ColorList"
        Me.ColorList.Size = New System.Drawing.Size(12121)
        Me.ColorList.TabIndex = 1
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292221)
        Me.Controls.Add(Me.ColorList)
        Me.Controls.Add(Me.XButton)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "Control Drawing"
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents XButton As System.Windows.Forms.Button
    Friend WithEvents ColorList As System.Windows.Forms.ComboBox

End Class
Public Class Form1
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgsHandles Me.Load
        ColorList.Items.Add("Red")
        ColorList.Items.Add("Orange")
        ColorList.Items.Add("Yellow")
        ColorList.Items.Add("Green")
        ColorList.Items.Add("Blue")
        ColorList.Items.Add("Indigo")
        ColorList.Items.Add("Violet")
    End Sub

    Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgsHandles Me.Paint
        e.Graphics.DrawEllipse(Pens.Black, 1010, Me.ClientRectangle.Width - 20, _
            Me.ClientRectangle.Height - 20)
    End Sub

    Private Sub XButton_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgsHandles XButton.Paint
        Dim usePen As Pen

        e.Graphics.Clear(SystemColors.Control)

        usePen = New Pen(SystemColors.ControlText, 3)
        e.Graphics.DrawRectangle(usePen, XButton.ClientRectangle)

        usePen.Dispose()
    End Sub

    Private Sub ColorList_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgsHandles ColorList.DrawItem
        Dim useBrush As Brush

        If (e.Index = -1Then Return

        e.DrawBackground()

        useBrush = New SolidBrush(Color.FromName(CStr(ColorList.Items(e.Index))))
        e.Graphics.FillRectangle(useBrush, _
            e.Bounds.Left + 2, e.Bounds.Top + 2, _
            e.Bounds.Width - 4, e.Bounds.Height - 4)
        useBrush.Dispose()

        e.Graphics.DrawRectangle(Pens.Black, _
            e.Bounds.Left + 2, e.Bounds.Top + 2, _
            e.Bounds.Width - 4, e.Bounds.Height - 4)
        e.DrawFocusRectangle()
    End Sub

    Private Sub XButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgsHandles XButton.Click
        MsgBox("Button clicked.")
    End Sub
End Class

public class ComboBoxCellRenderer
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
14.6.ComboBox
14.6.1.Get Text from ComboBoxGet Text from ComboBox
14.6.2.Set text for ComboBoxSet text for ComboBox
14.6.3.ComboBox Selected Index Changed eventComboBox Selected Index Changed event
14.6.4.Add value to ComboBoxAdd value to ComboBox
14.6.5.ComboBox selection event and Add itemsComboBox selection event and Add items
14.6.6.Using ComboBox to select shape to drawUsing ComboBox to select shape to draw
14.6.7.ComboBox Cell rendererComboBox Cell renderer
14.6.8.Use ComboBox to control TextBox font colorUse ComboBox to control TextBox font color
14.6.9.HatchBrush Illustration by using ComboBoxHatchBrush Illustration by using ComboBox
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