Using ComboBox to select shape to draw : ComboBox « GUI « VB.Net Tutorial

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VB.Net Tutorial » GUI » ComboBox 
14.6.6.Using ComboBox to select shape to draw
Using ComboBox to select shape to draw
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class DrawShapes
   public Shared Sub Main
        Application.Run(New FrmComboBox)
   End Sub
End class

Public Class FrmComboBox
   Inherits 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 NothingThen
            components.Dispose()
         End If
      End If
      MyBase.Dispose(disposing)
   End Sub

   ' contains shape list (circle, square, ellipse, pie
   Friend WithEvents cboImage As System.Windows.Forms.ComboBox

   'Required by the Windows Form Designer
   Private components As System.ComponentModel.Container

   '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.cboImage = New System.Windows.Forms.ComboBox()
      Me.SuspendLayout()
      '
      'cboImage
      '
      Me.cboImage.DropDownWidth = 121
      Me.cboImage.Items.AddRange(New Object() {"Circle""Square""Ellipse""Pie""Filled Circle""Filled Square""Filled Ellipse""Filled Pie"})
      Me.cboImage.Location = New System.Drawing.Point(2416)
      Me.cboImage.Name = "cboImage"
      Me.cboImage.Size = New System.Drawing.Size(12121)
      Me.cboImage.TabIndex = 0
      '
      'FrmComboBox
      '
      Me.AutoScaleBaseSize = New System.Drawing.Size(513)
      Me.ClientSize = New System.Drawing.Size(292273)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cboImage})
      Me.Name = "FrmComboBox"
      Me.Text = "ComboBoxTest"
      Me.ResumeLayout(False)

   End Sub

#End Region

   Private Sub cboImage_SelectedIndexChanged _
      (ByVal sender As System.Object, _
      ByVal e As System.EventArgs_
      Handles cboImage.SelectedIndexChanged

      Dim myGraphics As Graphics = MyBase.CreateGraphics()
      Dim myPen As New Pen(Color.DarkRed)
      Dim mySolidBrush As New SolidBrush(Color.DarkRed)

      myGraphics.Clear(Color.White)

      Select Case cboImage.SelectedIndex
         Case ' case circle is selected
            myGraphics.DrawEllipse(myPen, 5050150150)
         Case 
            myGraphics.DrawRectangle(myPen, 5050150150)
         Case 
            myGraphics.DrawEllipse(myPen, 5085150115)
         Case 
            myGraphics.DrawPie(myPen, 5050150150045)
         Case 
            myGraphics.FillEllipse(mySolidBrush, 5050150150)
         Case 
            myGraphics.FillRectangle(mySolidBrush, 5050150150)
         Case 
            myGraphics.FillEllipse(mySolidBrush, 5085150115)
         Case 
            myGraphics.FillPie(mySolidBrush, 5050150150045)
      End Select
   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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