GraphicsPathIterator : GraphicsPathIterator « 2D Graphics « VB.Net Tutorial






  1. VB.Net Tutorial
  2. 2D Graphics
  3. GraphicsPathIterator
GraphicsPathIterator
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class GraphicsPathIteratorDemo
   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 = e.Graphics
        ' Create a Rectangle
        Dim rect As New Rectangle(50, 50, 100, 50)
        ' Create a Graphics path
        Dim path As New GraphicsPath
        Dim ptsArray As PointF() = {New PointF(20, 20), New PointF(60, 12), New PointF(100, 20)}
        ' Add a curve, rectangle, ellipse, and a line
        path.AddCurve(ptsArray)
        path.AddRectangle(rect)
        rect.Y += 60
        path.AddEllipse(rect)
        path.AddLine(120, 50, 220, 100)
        ' Draw path
        g.DrawPath(Pens.Blue, path)
        ' Create a Graphics path iterator
        Dim pathIterator As New GraphicsPathIterator(path)
        ' Display total points and sub paths
        Console.WriteLine("Total points = " & pathIterator.Count)
        Console.WriteLine("Sub paths = " & pathIterator.SubpathCount)

        pathIterator.Rewind()
        ' Read all subpaths and their properties
        Dim i As Integer
        For i = 0 To pathIterator.SubpathCount - 1
            Dim strtIdx, endIdx As Integer
            Dim bClosedCurve As Boolean
            pathIterator.NextSubpath(strtIdx, endIdx, bClosedCurve)
            Console.WriteLine("Start Index = " & strtIdx)
            Console.WriteLine("End Index = " & endIdx)
            Console.WriteLine("IsClosed = " & bClosedCurve)
        Next i


  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








17.42.GraphicsPathIterator
17.42.1.GraphicsPathIteratorGraphicsPathIterator