VB.Net/2D/Pen

Материал из VB Эксперт
Версия от 15:41, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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Draw Curve with Different pens

<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing.Text Imports System.Drawing Public Class MainClass

   Shared Sub Main(ByVal args As String())
       Dim myform As Form = New Form1()
       Application.Run(myform)
   End Sub

End Class

Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       " Define the curve"s control points.
       Dim pts() As Point = { _
           New Point(200, 30), _
           New Point(200, 150), _
           New Point(10, 50), _
           New Point(250, 200), _
           New Point(20, 200), _
           New Point(250, 50), _
           New Point(100, 250) _
       }
       " Draw the closed curve.
       e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
       For tension As Single = 0 To 2 Step 0.25
           Dim curve_pen As New Pen(Color.Black, tension * 4 + 1)
           e.Graphics.DrawClosedCurve(curve_pen, pts, tension, _
               Drawing2D.FillMode.Alternate)
       Next tension
       " Draw rectangles on the control points.
       For i As Integer = 0 To pts.Length - 1
           e.Graphics.FillRectangle(Brushes.White, pts(i).X - 2, pts(i).Y - 2, 5, 5)
           e.Graphics.DrawRectangle(Pens.Black, pts(i).X - 2, pts(i).Y - 2, 5, 5)
       Next i
   End Sub

End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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.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()
       Me.SuspendLayout()
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(364, 309)
       Me.Name = "Form1"
       Me.Text = "Title"
       Me.ResumeLayout(False)
   End Sub

End Class

      </source>


Draw thick rectangle outline in red

<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Drawing.Text Public Class MainClass

  Shared Sub Main()
       Dim myform As Form = New FrmDrawShapes()
       Application.Run(myform)
  End Sub " Main

End Class

Public Class FrmDrawShapes

  Inherits System.Windows.Forms.Form
  1. 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()
     "
     "frmDrawShapes
     "
     Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
     Me.ClientSize = New System.Drawing.Size(520, 197)
     Me.Name = "frmDrawShapes"
     Me.Text = "Drawing Shapes"
  End Sub
  1. End Region
  " draw various shapes on form
  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
     " references to object we will use
     Dim graphicsObject As Graphics = e.Graphics
     " pen and location for red outline rectangle
     Dim thickRedPen As Pen = New Pen(Color.Red, 10)
     Dim drawArea2 As Rectangle = New Rectangle(80, 30, 65, 100)
     " draw thick rectangle outline in red
     graphicsObject.DrawRectangle(thickRedPen, drawArea2)
  End Sub " OnPaint

End Class

      </source>


Draw with Pen Compound Array

<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms

Public Class MainClass

  Shared Sub Main()
      Dim form1 As Form = New Form1()
      Application.Run(form1)
  End Sub " ValidationError

End Class


Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
       Dim the_pen As New Pen(Color.Black, 10)
       the_pen.rupoundArray = New Single() {0.0, 0.2, 0.4, 0.6, 0.8, 1.0}
       e.Graphics.DrawRectangle(the_pen, 20, 50, 100, 100)
       e.Graphics.DrawEllipse(the_pen, 150, 50, 100, 100)
   End Sub

End Class


<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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.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()
       Me.SuspendLayout()
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(292, 273)
       Me.Name = "Form1"
       Me.Text = "TransformArrow"
       Me.ResumeLayout(False)
   End Sub

End Class


      </source>


Pen Compound Array Demo 1

<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms

Public Class MainClass

  Shared Sub Main()
      Dim form1 As Form = New Form1()
      Application.Run(form1)
  End Sub " ValidationError

End Class


Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
       Dim the_pen As New Pen(Color.Black, 10)
       the_pen.rupoundArray = New Single() {0.0, 0.45, 0.55, 1.0}
       e.Graphics.DrawLine(the_pen, 10, 20, 400, 20)
   End Sub

End Class


<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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.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()
       Me.SuspendLayout()
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(292, 273)
       Me.Name = "Form1"
       Me.Text = "TransformArrow"
       Me.ResumeLayout(False)
   End Sub

End Class


      </source>


Pen"s Compound Array

<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text

Public Class MainClass

 Shared Sub Main()
    Dim form1 As Form1 = new Form1
    Application.Run(form1)
 End Sub
 

End Class


Public Class Form1

 Inherits System.Windows.Forms.Form
  1. 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()
   Me.SuspendLayout()
   "
   "Form1
   "
   Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
   Me.ClientSize = New System.Drawing.Size(392, 213)
   Me.Controls.AddRange(New System.Windows.Forms.Control() {})
   Me.Name = "Form1"
   Me.Text = "Form1"
   Me.ResumeLayout(False)
 End Sub
  1. End Region
 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 End Sub
 Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
   Dim G As Graphics = e.Graphics
   Dim P1 As Pen = New Pen(Color.Blue, 10)
   "compoundarray
   Dim P3 As Pen = New Pen(Color.Blue, 20)
   Dim lines() As Single = {0.0, 0.1, 0.9, 1.0}
   P3.rupoundArray = lines
   G.DrawLine(P3, 20, CInt(Me.Height / 2), Me.Width - 20, CInt(Me.Height / 2))
 End Sub

End Class

      </source>


Pen width Demo

<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms

Public Class MainClass

  Shared Sub Main()
      Dim form1 As Form = New Form1()
      Application.Run(form1)
  End Sub " ValidationError

End Class


Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
       Dim the_pen As New Pen(Color.Black, 1)
       e.Graphics.DrawLine(the_pen, 50, 10, 200, 10)
       the_pen.Width = 5
       e.Graphics.DrawLine(the_pen, 50, 40, 200, 40)
       the_pen.Width = 10
       e.Graphics.DrawLine(the_pen, 50, 100, 200, 100)
       the_pen.Width = 20
       e.Graphics.DrawLine(the_pen, 50, 200, 200, 200)
   End Sub

End Class


<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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.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()
       Me.SuspendLayout()
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(292, 273)
       Me.Name = "Form1"
       Me.Text = "TransformArrow"
       Me.ResumeLayout(False)
   End Sub

End Class


      </source>


Transformed Pen

<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms Imports System.Math Public Class MainClass

  Shared Sub Main()
      Dim form1 As Form = New Form1()
      Application.Run(form1)
  End Sub 

End Class

Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       Const Cx As Integer = 120
       Const Cy As Integer = 120
       Const R As Integer = 100
       Const PEN_WID As Integer = 10
       Dim the_pen As New Pen(Color.Black, PEN_WID)
       the_pen.ScaleTransform(1, 4, MatrixOrder.Append)
       the_pen.RotateTransform(45, MatrixOrder.Append)
       e.Graphics.SmoothingMode = SmoothingMode.AntiAlias
       e.Graphics.ScaleTransform(1, 4, MatrixOrder.Append)
       e.Graphics.RotateTransform(45, MatrixOrder.Append)
       For angle As Single = 0 To 2 * PI Step PI / 8
           Dim graphics_state As GraphicsState = e.Graphics.Save
           e.Graphics.TranslateTransform( _
               CSng(Cx + R * Cos(angle)), _
               CSng(Cy + R * Sin(angle)), _
               MatrixOrder.Append)
           e.Graphics.DrawEllipse(Pens.White, -PEN_WID , -PEN_WID , PEN_WID, PEN_WID)
           e.Graphics.Restore(graphics_state)
       Next angle
   End Sub

End Class


<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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.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()
       Me.SuspendLayout()
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(200, 200)
       Me.Name = "Form1"
       Me.Text = ""
       Me.ResumeLayout(False)
   End Sub

End Class


      </source>