VB.Net Tutorial/2D Graphics/Pie

Drawing various pies on a form

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawPieDemo
   public Shared Sub Main
        Application.Run(New FrmArcTest)
   End Sub
End class
Public Class FrmArcTest
   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.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()
      "
      "frmArcTest
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.BackColor = System.Drawing.SystemColors.ControlLight
      Me.ClientSize = New System.Drawing.Size(292, 221)
      Me.Name = "frmArcTest"
      Me.Text = "Drawing Arcs"
   End Sub
#End Region
   Protected Overrides Sub OnPaint( _
   ByVal paintEvent As PaintEventArgs)
      Dim graphicsObject As Graphics = paintEvent.Graphics
      Dim rectangle1 As Rectangle = New Rectangle(15, 35, 80, 80)
      Dim brush1 As SolidBrush = New SolidBrush(Color.Firebrick)
      Dim pen1 As Pen = New Pen(brush1, 1)
      Dim brush2 As SolidBrush = New SolidBrush(Color.DarkBlue)
      Dim pen2 As Pen = New Pen(brush2, 1)
      " start at 0 and sweep 360 degrees
      graphicsObject.DrawArc(pen2, rectangle1, 0, 360)
      " start at 0 and sweep -270 degrees
      rectangle1.Location = New Point(185, 35)
      graphicsObject.DrawArc(pen2, rectangle1, 0, -270)
   End Sub
End Class

Draw Pie

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 Nothing) Then
            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.ruboBox
   "Required by the Windows Form Designer
   Private components As System.ruponentModel.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.ruboBox()
      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(24, 16)
      Me.cboImage.Name = "cboImage"
      Me.cboImage.Size = New System.Drawing.Size(121, 21)
      Me.cboImage.TabIndex = 0
      "
      "FrmComboBox
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(292, 273)
      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 0 " case circle is selected
            myGraphics.DrawEllipse(myPen, 50, 50, 150, 150)
         Case 1 
            myGraphics.DrawRectangle(myPen, 50, 50, 150, 150)
         Case 2 
            myGraphics.DrawEllipse(myPen, 50, 85, 150, 115)
         Case 3 
            myGraphics.DrawPie(myPen, 50, 50, 150, 150, 0, 45)
         Case 4 
            myGraphics.FillEllipse(mySolidBrush, 50, 50, 150, 150)
         Case 5 
            myGraphics.FillRectangle(mySolidBrush, 50, 50, 150, 150)
         Case 6 
            myGraphics.FillEllipse(mySolidBrush, 50, 85, 150, 115)
         Case 7 
            myGraphics.FillPie(mySolidBrush, 50, 50, 150, 150, 0, 45)
      End Select
   End Sub
End Class

Fill pies

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawPieDemo
   public Shared Sub Main
        Application.Run(New FrmArcTest)
   End Sub
End class
Public Class FrmArcTest
   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.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()
      "
      "frmArcTest
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.BackColor = System.Drawing.SystemColors.ControlLight
      Me.ClientSize = New System.Drawing.Size(292, 221)
      Me.Name = "frmArcTest"
      Me.Text = "Drawing Arcs"
   End Sub
#End Region
   Protected Overrides Sub OnPaint( _
   ByVal paintEvent As PaintEventArgs)
      Dim graphicsObject As Graphics = paintEvent.Graphics
      Dim rectangle1 As Rectangle = New Rectangle(15, 35, 80, 80)
      Dim brush1 As SolidBrush = New SolidBrush(Color.Firebrick)
      Dim pen1 As Pen = New Pen(brush1, 1)
      Dim brush2 As SolidBrush = New SolidBrush(Color.DarkBlue)
      Dim pen2 As Pen = New Pen(brush2, 1)
      " start at 0 and sweep 360 degrees
      rectangle1.Location = New Point(15, 120)
      rectangle1.Size = New Size(80, 40)
      graphicsObject.FillPie(brush2, rectangle1, 0, 360)
      " start at 270 and sweep -90 degrees
      rectangle1.Location = New Point(100, 120)
      graphicsObject.FillPie(brush2, rectangle1, 270, -90)
      " start at 0 and sweep -270 degrees
      rectangle1.Location = New Point(185, 120)
      graphicsObject.FillPie(brush2, rectangle1, 0, -270)
   End Sub
End Class