VB.Net Tutorial/2D Graphics/Scale

Scale(1,1)

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class Scaling11
   public Shared Sub Main
        Application.Run(New ScalingFontsForm)
   End Sub
End class


Public Class ScalingFontsForm
    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()
        "
        "ScalingFontsForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(512, 70)
        Me.Name = "ScalingFontsForm"
        Me.Text = "ScalingFontsForm"
    End Sub
#End Region

    Sub ScalingFontsForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        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 format As StringFormat = New StringFormat()
        format.Alignment = StringAlignment.Center
        format.LineAlignment = StringAlignment.Center
        Dim matrix As Matrix = New Matrix()
        g.ResetTransform()
        g.DrawRectangle(Pens.Black, x, y, width, height)
        matrix.Reset()
        matrix.Scale(1, 1)
        g.Transform = matrix
        g.DrawString("Scale(1,1)", Me.Font, Brushes.Black, New RectangleF(x, y, width, height), format)
    End Sub
End Class

Scale(-1, -1) (2)

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class ScalingNegative
   public Shared Sub Main
        Application.Run(New ScalingFontsForm)
   End Sub
End class


Public Class ScalingFontsForm
    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()
        "
        "ScalingFontsForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(512, 70)
        Me.Name = "ScalingFontsForm"
        Me.Text = "ScalingFontsForm"
    End Sub
#End Region

    Sub ScalingFontsForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        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 format As StringFormat = New StringFormat()
        format.Alignment = StringAlignment.Center
        format.LineAlignment = StringAlignment.Center
        Dim matrix As Matrix = New Matrix()
        g.ResetTransform()
        g.DrawRectangle(Pens.Black, x, y, width, height)
        matrix.Reset()
        matrix.Scale(-1, -1)
        g.Transform = matrix
        g.DrawString("Scale(-1,-1)", Me.Font, Brushes.Black, New RectangleF(-x - width, -y - height, width, height), format)
    End Sub
End Class

Scale(1,3)

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class Scaling13
   public Shared Sub Main
        Application.Run(New ScalingFontsForm)
   End Sub
End class


Public Class ScalingFontsForm
    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()
        "
        "ScalingFontsForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(512, 70)
        Me.Name = "ScalingFontsForm"
        Me.Text = "ScalingFontsForm"
    End Sub
#End Region

    Sub ScalingFontsForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        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 format As StringFormat = New StringFormat()
        format.Alignment = StringAlignment.Center
        format.LineAlignment = StringAlignment.Center
        Dim matrix As Matrix = New Matrix()
        g.ResetTransform()
        g.DrawRectangle(Pens.Black, x, y, width, height)
        matrix.Reset()
        matrix.Scale(1, 3)
        g.Transform = matrix
        g.DrawString("Scale(1,3)", Me.Font, Brushes.Black, New RectangleF(x, y / 3.0F, width, height / 3.0F), format)
    End Sub
End Class

Scale(3, 1)

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class Scaling31
   public Shared Sub Main
        Application.Run(New ScalingFontsForm)
   End Sub
End class


Public Class ScalingFontsForm
    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()
        "
        "ScalingFontsForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(512, 70)
        Me.Name = "ScalingFontsForm"
        Me.Text = "ScalingFontsForm"
    End Sub
#End Region

    Sub ScalingFontsForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        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 format As StringFormat = New StringFormat()
        format.Alignment = StringAlignment.Center
        format.LineAlignment = StringAlignment.Center
        Dim matrix As Matrix = New Matrix()
        g.ResetTransform()
        g.DrawRectangle(Pens.Black, x, y, width, height)
        matrix.Reset()
        matrix.Scale(3, 1)
        g.Transform = matrix
        g.DrawString("Scale(3,1)", Me.Font, Brushes.Black, New RectangleF(x / 3.0F, y, width / 3.0F, height), format)
    End Sub
End Class

Scale Diamond

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class TranslateTransformScaleTransform
   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)
        DrawDiamond(e.Graphics)

        e.Graphics.TranslateTransform(-125, -125, MatrixOrder.Append)
        e.Graphics.ScaleTransform(2, 2, MatrixOrder.Append)
        e.Graphics.TranslateTransform(125, 125, MatrixOrder.Append)
        DrawDiamond(e.Graphics)
    End Sub
    Private Sub DrawDiamond(ByVal gr As Graphics)
        Dim pts() As Point = { _
            New Point(75, 125), _
            New Point(125, 75), _
            New Point(175, 125), _
            New Point(125, 175) _
        }
        gr.DrawPolygon(Pens.Black, pts)
    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 Class

Scale first and then Transform

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class ScaleFirstThenTransform
   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)
        e.Graphics.ScaleTransform(30, 30, MatrixOrder.Append)
        e.Graphics.TranslateTransform(50, 60, MatrixOrder.Append)
        DrawArrow(e.Graphics, HatchStyle.Vertical)
    End Sub
    Private Sub DrawArrow(ByVal gr As Graphics, ByVal hatch_style As HatchStyle)
        Dim pts() As Point = { _
            New Point(0, 1), _
            New Point(2, 1), _
            New Point(2, 0), _
            New Point(4, 2), _
            New Point(2, 4), _
            New Point(2, 3), _
            New Point(0, 3) _
        }
        gr.FillPolygon(New HatchBrush(hatch_style, Color.Black, Color.White), pts)
        gr.DrawPolygon(New Pen(Color.Black, 0), pts)
    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 Class