Public Sub NextPathTypeExample(ByVal e As PaintEventArgs)
' Create the GraphicsPath.
Dim myPath As New GraphicsPath
Dim myPoints As Point() = {New Point(20, 20), _
New Point(120, 120), New Point(20, 120), New Point(20, 20)}
Dim myRect As New Rectangle(120, 120, 100, 100)
' Add 3 lines, a rectangle, and an ellipse.
myPath.AddLines(myPoints)
myPath.AddRectangle(myRect)
myPath.AddEllipse(220, 220, 100, 100)
' List all of the path points to the screen.
ListPathPointsHelper(e, myPath, Nothing, 20, 1)
' Create a GraphicsPathIterator.
Dim myPathIterator As New GraphicsPathIterator(myPath)
' Rewind the Iterator.
myPathIterator.Rewind()
' Iterate the subpaths and types, and list the results
' to the screen.
Dim j As Integer = 20
Dim i As Integer
Dim mySubPaths, subPathStartIndex, subPathEndIndex As Integer
Dim IsClosed As [Boolean]
Dim subPathPointType As Byte
Dim pointTypeStartIndex, pointTypeEndIndex, _
numPointsFound As Integer
Dim myFont As New Font("Arial", 8)
Dim myBrush As New SolidBrush(Color.Black)
j = 20
For i = 0 To 2
mySubPaths = myPathIterator.NextSubpath(subPathStartIndex, _
subPathEndIndex, IsClosed)
numPointsFound = myPathIterator.NextPathType(subPathPointType, _
pointTypeStartIndex, pointTypeEndIndex)
e.Graphics.DrawString("SubPath: " & i & " Points Found: " & _
numPointsFound.ToString() & " Type of Points: " & _
subPathPointType.ToString(), myFont, myBrush, 200, j)
j += 20
Next i
' List the total number of path points to the screen.
ListPathPointsHelper(e, myPath, myPathIterator, 200, 2)
End Sub
' This is a helper function used by NextPathTypeExample.
Public Sub ListPathPointsHelper(ByVal e As PaintEventArgs, _
ByVal myPath As GraphicsPath, ByVal myPathIterator As GraphicsPathIterator, _
ByVal xOffset As Integer, ByVal listType As Integer)
' Get the total number of points for the path,
' and the arrays of the points and types.
Dim myPathPointCount As Integer = myPath.PointCount
Dim myPathPoints As PointF() = myPath.PathPoints
Dim myPathTypes As Byte() = myPath.PathTypes
' Set up variables for drawing the points to the screen.
Dim i As Integer
Dim j As Single = 20
Dim myFont As New Font("Arial", 8)
Dim myBrush As New SolidBrush(Color.Black)
If listType = 1 Then
' List all the path points to the screen.
' Draw the set of path points and types to the screen.
For i = 0 To myPathPointCount - 1
e.Graphics.DrawString(myPathPoints(i).X.ToString() + ", " + _
myPathPoints(i).Y.ToString() + ", " + _
myPathTypes(i).ToString(), myFont, myBrush, xOffset, j)
j += 20
Next i
Else
If listType = 2 Then
' Display the total number of path points.
' Draw the total number of points to the screen.
Dim myPathTotalPoints As Integer = myPathIterator.Count
e.Graphics.DrawString("Total Points = " + _
myPathTotalPoints.ToString(), myFont, myBrush, xOffset, _
100)
Else
e.Graphics.DrawString("Wrong or no list type argument.", _
myFont, myBrush, xOffset, 200)
End If
End If
End Sub
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