Create Region from Rectangle
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class CreateRegionFromRectangle
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
public class Form1
Inherits System.Windows.Forms.Form
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim g As Graphics = Me.CreateGraphics()
g.Clear(Me.BackColor)
Dim rect1 As New Rectangle(20, 20, 60, 80)
Dim rect2 As New Rectangle(100, 100, 30, 40)
Dim rgn1 As New [Region](rect2)
g.ExcludeClip(rect1)
g.ExcludeClip(rgn1)
g.FillRectangle(Brushes.Red, 0, 0, 200, 200)
g.Dispose()
End Sub
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
End Sub
End ClassRegion: Complement
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionComplement
public Shared Sub Main
Application.Run(New CombinationsForm)
End Sub
End class
Public Class CombinationsForm
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()
"
"CombinationsForm
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(200, 118)
Me.Name = "CombinationsForm"
Me.Text = "CombinationsForm"
End Sub
#End Region
Private Sub CombinationsForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim width As Single = Me.ClientSize.Width
Dim height As Single = Me.ClientSize.Height
Dim rect As RectangleF = New RectangleF(0, 0, width, height)
Dim path1 As GraphicsPath = New GraphicsPath()
Dim path2 As GraphicsPath = New GraphicsPath()
Dim path1Rect As RectangleF = New RectangleF(0, 0, width * 2.0F / 3.0F, height)
Dim path2rect As RectangleF = path1Rect
path2rect.Offset(width * 1.0F / 3.0F, 0)
path1.AddEllipse(path1Rect)
path2.AddEllipse(path2rect)
Dim region As Region = New Region(path1)
region.ruplement(path2)
g.FillRegion(Brushes.Red, region)
g.TranslateTransform(width, 0)
End Sub
End ClassRegion: Exclude
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionExclude
public Shared Sub Main
Application.Run(New CombinationsForm)
End Sub
End class
Public Class CombinationsForm
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()
"
"CombinationsForm
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(200, 118)
Me.Name = "CombinationsForm"
Me.Text = "CombinationsForm"
End Sub
#End Region
Private Sub CombinationsForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim width As Single = Me.ClientSize.Width
Dim height As Single = Me.ClientSize.Height
Dim rect As RectangleF = New RectangleF(0, 0, width, height)
Dim path1 As GraphicsPath = New GraphicsPath()
Dim path2 As GraphicsPath = New GraphicsPath()
Dim path1Rect As RectangleF = New RectangleF(0, 0, width * 2.0F / 3.0F, height)
Dim path2rect As RectangleF = path1Rect
path2rect.Offset(width * 1.0F / 3.0F, 0)
path1.AddEllipse(path1Rect)
path2.AddEllipse(path2rect)
Dim region As Region = New Region(path1)
region.Exclude(path2)
g.FillRegion(Brushes.Red, region)
g.TranslateTransform(width, 0)
End Sub
End ClassRegion: Intersect
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionIntersect
public Shared Sub Main
Application.Run(New CombinationsForm)
End Sub
End class
Public Class CombinationsForm
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()
"
"CombinationsForm
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(200, 118)
Me.Name = "CombinationsForm"
Me.Text = "CombinationsForm"
End Sub
#End Region
Private Sub CombinationsForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim width As Single = Me.ClientSize.Width
Dim height As Single = Me.ClientSize.Height
Dim rect As RectangleF = New RectangleF(0, 0, width, height)
Dim path1 As GraphicsPath = New GraphicsPath()
Dim path2 As GraphicsPath = New GraphicsPath()
Dim path1Rect As RectangleF = New RectangleF(0, 0, width * 2.0F / 3.0F, height)
Dim path2rect As RectangleF = path1Rect
path2rect.Offset(width * 1.0F / 3.0F, 0)
path1.AddEllipse(path1Rect)
path2.AddEllipse(path2rect)
Dim region As Region = New Region(path1)
region.Intersect(path2)
g.FillRegion(Brushes.Red, region)
g.TranslateTransform(width, 0)
End Sub
End ClassRegion.MakeEmpty, Region.MakeInfinite, Region.GetBounds
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionMakeEmptyMakeInfinite
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
public class Form1
Inherits System.Windows.Forms.Form
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim g As Graphics = Me.CreateGraphics()
g.Clear(Me.BackColor)
Dim rect1 As New Rectangle(20, 20, 60, 80)
Dim rect2 As New Rectangle(50, 30, 60, 80)
Dim rgn1 As New [Region](rect1)
Dim rgn2 As New [Region](rect2)
If Not rgn1.IsEmpty(g) Then
rgn1.MakeEmpty()
End If
If Not rgn2.IsInfinite(g) Then
rgn2.MakeInfinite()
End If " Get bounds of the infinite region
Dim rect As RectangleF = rgn2.GetBounds(g)
Console.WriteLine(rect.ToString())
g.FillRegion(Brushes.Red, rgn2)
g.Dispose()
End Sub
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
End Sub
End ClassRegion: Union
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionUnion
public Shared Sub Main
Application.Run(New CombinationsForm)
End Sub
End class
Public Class CombinationsForm
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()
"
"CombinationsForm
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(200, 118)
Me.Name = "CombinationsForm"
Me.Text = "CombinationsForm"
End Sub
#End Region
Private Sub CombinationsForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim width As Single = Me.ClientSize.Width
Dim height As Single = Me.ClientSize.Height
Dim rect As RectangleF = New RectangleF(0, 0, width, height)
Dim path1 As GraphicsPath = New GraphicsPath()
Dim path2 As GraphicsPath = New GraphicsPath()
Dim path1Rect As RectangleF = New RectangleF(0, 0, width * 2.0F / 3.0F, height)
Dim path2rect As RectangleF = path1Rect
path2rect.Offset(width * 1.0F / 3.0F, 0)
path1.AddEllipse(path1Rect)
path2.AddEllipse(path2rect)
Dim region As Region = New Region(path1)
region.Union(path2)
g.FillRegion(Brushes.Red, region)
g.TranslateTransform(width, 0)
End Sub
End ClassRegion: Xor
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionXor
public Shared Sub Main
Application.Run(New CombinationsForm)
End Sub
End class
Public Class CombinationsForm
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()
"
"CombinationsForm
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(200, 118)
Me.Name = "CombinationsForm"
Me.Text = "CombinationsForm"
End Sub
#End Region
Private Sub CombinationsForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim width As Single = Me.ClientSize.Width
Dim height As Single = Me.ClientSize.Height
Dim rect As RectangleF = New RectangleF(0, 0, width, height)
Dim path1 As GraphicsPath = New GraphicsPath()
Dim path2 As GraphicsPath = New GraphicsPath()
Dim path1Rect As RectangleF = New RectangleF(0, 0, width * 2.0F / 3.0F, height)
Dim path2rect As RectangleF = path1Rect
path2rect.Offset(width * 1.0F / 3.0F, 0)
path1.AddEllipse(path1Rect)
path2.AddEllipse(path2rect)
Dim region As Region = New Region(path1)
region.Xor(path2)
g.FillRegion(Brushes.Red, region)
g.TranslateTransform(width, 0)
End Sub
End Class
