GraphicsPathIterator.CopyData Method

Source:

GraphicsPathIterator.cs

Source:

GraphicsPathIterator.cs

Source:

GraphicsPathIterator.cs

public:
 int CopyData(cli::array <System::Drawing::PointF> ^ % points, cli::array <System::Byte> ^ % types, int startIndex, int endIndex);

public int CopyData (ref System.Drawing.PointF[] points, ref byte[] types, int startIndex, int endIndex);

member this.CopyData : PointF[] * Byte[] * int * int -> int

Public Function CopyData (ByRef points As PointF(), ByRef types As Byte(), startIndex As Integer, endIndex As Integer) As Integer

Parameters

Returns

The number of points copied.

Examples

The following example is designed for use with Windows Forms, and it requires PaintEventArgs e, an OnPaint event object. The code performs the following actions:

• Creates a graphics path.

• Populates it with several primitives and some markers.

• Lists the path data on the left side of the screen.

• Creates a GraphicsPathIterator and rewinds it.

• Increments the path data index to the second marker.

• Calls the CopyData method to copy the path data contained between the start and end indexes to the points and types arrays.

• Lists this copied data on the right side of the screen.

public:
   void CopyDataExample( PaintEventArgs^ e )
   {
      // Create a graphics path.
      GraphicsPath^ myPath = gcnew GraphicsPath;

      // Set up a points array.
      array<Point>^ myPoints = {Point(20,20),Point(120,120),Point(20,120),Point(20,20)};

      // Create a rectangle.
      Rectangle myRect = Rectangle(120,120,100,100);

      // Add the points, rectangle, and an ellipse to the path.
      myPath->AddLines( myPoints );
      myPath->SetMarkers();
      myPath->AddRectangle( myRect );
      myPath->SetMarkers();
      myPath->AddEllipse( 220, 220, 100, 100 );

      // Get the total number of points for the path, and arrays of
      // the  points and types.
      int myPathPointCount = myPath->PointCount;
      array<PointF>^myPathPoints = myPath->PathPoints;
      array<Byte>^myPathTypes = myPath->PathTypes;

      // Set up variables for listing the array of points on the left
      // side of the screen.
      int i;
      float j = 20;
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8 );
      SolidBrush^ myBrush = gcnew SolidBrush( Color::Black );

      // List the set of points and types and types to the left side
      // of the screen.
      for ( i = 0; i < myPathPointCount; i++ )
      {
         e->Graphics->DrawString( myPathPoints[ i ].X + ", " + myPathPoints[ i ].Y + ", " + myPathTypes[ i ], myFont, myBrush, 20, j );
         j += 20;
      }

      // Create a GraphicsPathIterator for myPath and rewind it.
      GraphicsPathIterator^ myPathIterator = gcnew GraphicsPathIterator( myPath );
      myPathIterator->Rewind();

      // Set up the arrays to receive the copied data.
      array<PointF>^points = gcnew array<PointF>(myPathIterator->Count);
      array<Byte>^types = gcnew array<Byte>(myPathIterator->Count);
      int myStartIndex;
      int myEndIndex;
      
      // Increment the starting index to the second marker in the
      // path.
      myPathIterator->NextMarker( myStartIndex, myEndIndex );
      myPathIterator->NextMarker( myStartIndex, myEndIndex );
      
      // Copy all the points and types from the starting index to the
      // ending index to the points array and the types array
      // respectively.
      int numPointsCopied = myPathIterator->CopyData( points, types, myStartIndex, myEndIndex );
      
      // List the copied points to the right side of the screen.
      j = 20;
      int copiedStartIndex = 0;
      for ( i = 0; i < numPointsCopied; i++ )
      {
         copiedStartIndex = myStartIndex + i;
         e->Graphics->DrawString( String::Format( "Point: {0}, Value: {1}, Type: {2}", copiedStartIndex, points[ i ], types[ i ] ), myFont, myBrush, 200, j );
         j += 20;

      }
   }

public void CopyDataExample(PaintEventArgs e)
{
             
    // Create a graphics path.
    GraphicsPath myPath = new GraphicsPath();
             
    // Set up a points array.
    Point[] myPoints =
             {
                 new Point(20, 20),
                 new Point(120, 120),
                 new Point(20, 120),
                 new Point(20, 20)
             };
             
    // Create a rectangle.
    Rectangle myRect = new Rectangle(120, 120, 100, 100);
             
    // Add the points, rectangle, and an ellipse to the path.
    myPath.AddLines(myPoints);
    myPath.SetMarkers();
    myPath.AddRectangle(myRect);
    myPath.SetMarkers();
    myPath.AddEllipse(220, 220, 100, 100);
             
    // Get the total number of points for the path, and arrays of
    // the  points and types.
    int myPathPointCount = myPath.PointCount;
    PointF[] myPathPoints = myPath.PathPoints;
    byte[] myPathTypes = myPath.PathTypes;
             
    // Set up variables for listing the array of points on the left
    // side of the screen.
    int i;
    float j = 20;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
             
    // List the set of points and types and types to the left side
    // of the screen.
    for(i=0; i<myPathPointCount; i++)
    {
        e.Graphics.DrawString(myPathPoints[i].X.ToString()+
            ", " + myPathPoints[i].Y.ToString() + ", " +
            myPathTypes[i].ToString(),
            myFont,
            myBrush,
            20,
            j);
        j+=20;
    }
             
    // Create a GraphicsPathIterator for myPath and rewind it.
    GraphicsPathIterator myPathIterator =
        new GraphicsPathIterator(myPath);
    myPathIterator.Rewind();
             
    // Set up the arrays to receive the copied data.
    PointF[] points = new PointF[myPathIterator.Count];
    byte[] types = new byte[myPathIterator.Count];
    int myStartIndex;
    int myEndIndex;
             
    // Increment the starting index to the second marker in the
    // path.
    myPathIterator.NextMarker(out myStartIndex, out myEndIndex);
    myPathIterator.NextMarker(out myStartIndex, out myEndIndex);
             
    // Copy all the points and types from the starting index to the
    // ending index to the points array and the types array
    // respectively.
    int numPointsCopied = myPathIterator.CopyData(
        ref points,
        ref types,
        myStartIndex,
        myEndIndex);
             
    // List the copied points to the right side of the screen.
    j = 20;
    int copiedStartIndex = 0;
    for(i=0; i<numPointsCopied; i++)
    {
        copiedStartIndex = myStartIndex + i;
        e.Graphics.DrawString(
            "Point: " + copiedStartIndex.ToString() +
            ", Value: " + points[i].ToString() +
            ", Type: " + types[i].ToString(),
            myFont,
            myBrush,
            200,
            j);
        j+=20;
    }
}

Public Sub CopyDataExample(ByVal e As PaintEventArgs)

    ' Create a graphics path.
    Dim myPath As New GraphicsPath

    ' Set up a points array.
    Dim myPoints As Point() = {New Point(20, 20), _
    New Point(120, 120), New Point(20, 120), New Point(20, 20)}

    ' Create a rectangle.
    Dim myRect As New Rectangle(120, 120, 100, 100)

    ' Add the points, rectangle, and an ellipse to the path.
    myPath.AddLines(myPoints)
    myPath.SetMarkers()
    myPath.AddRectangle(myRect)
    myPath.SetMarkers()
    myPath.AddEllipse(220, 220, 100, 100)

    ' Get the total number of points for the path, and 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 listing the array of points on the left side
    ' of 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)

    ' List the set of points and types and types to the left side of
    ' the screen.
    For i = 0 To myPathPointCount - 1
        e.Graphics.DrawString(myPathPoints(i).X.ToString() + ", " + _
        myPathPoints(i).Y.ToString() + ", " + _
        myPathTypes(i).ToString(), myFont, myBrush, 20, j)
        j += 20
    Next i

    ' Create a GraphicsPathIterator for myPath and rewind it.
    Dim myPathIterator As New GraphicsPathIterator(myPath)
    myPathIterator.Rewind()

    ' Set up the arrays to receive the copied data.
    Dim points(myPathIterator.Count) As PointF
    Dim types(myPathIterator.Count) As Byte
    Dim myStartIndex As Integer
    Dim myEndIndex As Integer

    ' Increment the starting index to the second marker in the path.
    myPathIterator.NextMarker(myStartIndex, myEndIndex)
    myPathIterator.NextMarker(myStartIndex, myEndIndex)

    ' Copy all the points and types from the starting index to the
    ' ending index to the  points array and the types array
    ' respectively.
    Dim numPointsCopied As Integer = myPathIterator.CopyData(points, _
    types, myStartIndex, myEndIndex)

    ' List the copied points to the right side of the screen.
    j = 20
    Dim copiedStartIndex As Integer = 0
    For i = 0 To numPointsCopied - 1
        copiedStartIndex = myStartIndex + i
        e.Graphics.DrawString("Point: " + _
        copiedStartIndex.ToString() + ", Value: " + _
        points(i).ToString() + ", Type: " + types(i).ToString(), _
        myFont, myBrush, 200, j)
        j += 20
    Next i
End Sub

Remarks

Use the startIndex and endIndex parameters to copy a specified range of the path data.

Source:

GraphicsPathIterator.cs

Source:

GraphicsPathIterator.cs

public:
 int CopyData(Span<System::Drawing::PointF> points, Span<System::Byte> types, int startIndex, int endIndex);

public int CopyData (Span<System.Drawing.PointF> points, Span<byte> types, int startIndex, int endIndex);

member this.CopyData : Span<System.Drawing.PointF> * Span<byte> * int * int -> int

Public Function CopyData (points As Span(Of PointF), types As Span(Of Byte), startIndex As Integer, endIndex As Integer) As Integer

Parameters

Returns

The number of points copied.