GraphicsPathIterator.NextMarker Metode

Definisi

Ruang nama:

System.Drawing.Drawing2D

Rakitan:

System.Drawing.Common.dll

Paket:

System.Drawing.Common v8.0.0

Memindahkan iterator ke penanda berikutnya di jalur.

Overload

NextMarker(GraphicsPath)	Objek ini GraphicsPathIterator memiliki objek yang GraphicsPath terkait dengannya. Metode ini NextMarker(GraphicsPath) menambah yang terkait dengan penanda berikutnya di jalurnya dan menyalin semua titik yang terkandung GraphicsPath antara penanda saat ini dan penanda berikutnya (atau akhir jalur) ke objek kedua GraphicsPath yang diteruskan ke parameter.
NextMarker(Int32, Int32)	Menaikkan GraphicsPathIterator ke penanda berikutnya di jalur dan mengembalikan indeks mulai dan hentikan dengan parameter [out].

NextMarker(GraphicsPath)

Sumber:

GraphicsPathIterator.cs

Objek ini GraphicsPathIterator memiliki objek yang GraphicsPath terkait dengannya. Metode ini NextMarker(GraphicsPath) menambah yang terkait dengan penanda berikutnya di jalurnya dan menyalin semua titik yang terkandung GraphicsPath antara penanda saat ini dan penanda berikutnya (atau akhir jalur) ke objek kedua GraphicsPath yang diteruskan ke parameter.

public:
 int NextMarker(System::Drawing::Drawing2D::GraphicsPath ^ path);

public int NextMarker (System.Drawing.Drawing2D.GraphicsPath path);

member this.NextMarker : System.Drawing.Drawing2D.GraphicsPath -> int

Public Function NextMarker (path As GraphicsPath) As Integer

Parameter

path

GraphicsPath

Objek GraphicsPath tempat titik akan disalin.

Mengembalikan

Int32

Jumlah titik antara penanda ini dan yang berikutnya.

Contoh

Contoh berikut dirancang untuk digunakan dengan Formulir Windows, dan memerlukan PaintEventArgse, OnPaint objek peristiwa. Kode melakukan tindakan berikut:

• GraphicsPath Membuat objek.

• Menambahkan tiga baris, persegi panjang, elips, dan dua penanda.

• Lists nilai semua titik jalur ke sisi kiri layar.

• GraphicsPathIterator Membuat objek.

• GraphicsPath Membuat objek, myPathSection, untuk menerima titik yang disalin.

• NextMarker Memanggil metode , yang berulang ke penanda pertama dan menyalin semua titik yang terkandung di antara penanda tersebut dan di samping myPathSection.

• Mengembalikan jumlah titik yang disalin ke markerPoints.

• Lists nomor penanda (penanda pertama) dan jumlah titik yang dikandungnya di sisi kanan layar.

public:
   void NextMarkerExample2( PaintEventArgs^ e )
   {
      // Create a graphics path.
      GraphicsPath^ myPath = gcnew GraphicsPath;

      // Set up primitives to add to myPath.
      array<Point>^ myPoints = {Point(20,20),Point(120,120),Point(20,120),Point(20,20)};
      Rectangle myRect = Rectangle(120,120,100,100);

      // Add 3 lines, a rectangle, an ellipse, and 2 markers.
      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 the 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 all the values of the path's
      // points to 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 values for all of path points 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.
      GraphicsPathIterator^ myPathIterator = gcnew GraphicsPathIterator( myPath );

      // Rewind the iterator.
      myPathIterator->Rewind();

      // Create a GraphicsPath to receive a section of myPath.
      GraphicsPath^ myPathSection = gcnew GraphicsPath;

      // Retrieve and list the number of points contained in
      // the first marker to the right side of the screen.
      int markerPoints;
      markerPoints = myPathIterator->NextMarker( myPathSection );
      e->Graphics->DrawString( String::Format( "Marker: 1  Num Points: {0}", markerPoints ), myFont, myBrush, 200, 20 );
   }

public void NextMarkerExample2(PaintEventArgs e)
{
             
    // Create a graphics path.
    GraphicsPath myPath = new GraphicsPath();
             
    // Set up primitives to add to myPath.
    Point[] myPoints = {new Point(20, 20), new Point(120, 120), 
        new Point(20, 120),new Point(20, 20) };        
 
    Rectangle myRect = new Rectangle(120, 120, 100, 100);
             
    // Add 3 lines, a rectangle, an ellipse, and 2 markers.
    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 the arrays of the points and types.
    int myPathPointCount = myPath.PointCount;
    PointF[] myPathPoints = myPath.PathPoints;
    byte[] myPathTypes = myPath.PathTypes;
             
    // Set up variables for listing all the values of the path's
    // points to the screen.
    int i;
    float j = 20;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
             
    // List the values for all of path points 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.
    GraphicsPathIterator myPathIterator = new
        GraphicsPathIterator(myPath);
             
    // Rewind the iterator.
    myPathIterator.Rewind();
             
    // Create a GraphicsPath to receive a section of myPath.
    GraphicsPath myPathSection = new GraphicsPath();
             
    // Retrieve and list the number of points contained in
             
    // the first marker to the right side of the screen.
    int markerPoints;
    markerPoints = myPathIterator.NextMarker(myPathSection);
    e.Graphics.DrawString("Marker: 1" + "  Num Points: " +
        markerPoints.ToString(),  myFont, myBrush, 200, 20);
}

Public Sub NextMarkerExample2(ByVal e As PaintEventArgs)

    ' Create a graphics path.
    Dim myPath As New GraphicsPath

    ' Set up primitives to add to myPath.
    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, an ellipse, and 2 markers.
    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 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 array
    ' of 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)

    ' 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, 20, j)
        j += 20
    Next i

    ' Create a GraphicsPathIterator.
    Dim myPathIterator As New GraphicsPathIterator(myPath)

    ' Rewind the iterator.
    myPathIterator.Rewind()

    ' Create a GraphicsPath section.
    Dim myPathSection As New GraphicsPath

    ' List the points contained in the first marker
    ' to the screen.
    Dim markerPoints As Integer
    markerPoints = myPathIterator.NextMarker(myPathSection)
    e.Graphics.DrawString("Marker: 1" + "  Num Points: " + _
        markerPoints.ToString(), myFont, myBrush, 200, 20)
End Sub

Keterangan

SetMarkers Gunakan metode untuk mengatur penanda di jalur. Penanda digunakan untuk membuat grup subjalur. Satu atau beberapa subpath dapat berada di antara dua penanda.

NextMarker(Int32, Int32)

Sumber:

GraphicsPathIterator.cs

Menaikkan GraphicsPathIterator ke penanda berikutnya di jalur dan mengembalikan indeks mulai dan hentikan dengan parameter [out].

public:
 int NextMarker([Runtime::InteropServices::Out] int % startIndex, [Runtime::InteropServices::Out] int % endIndex);

public int NextMarker (out int startIndex, out int endIndex);

member this.NextMarker : int * int -> int

Public Function NextMarker (ByRef startIndex As Integer, ByRef endIndex As Integer) As Integer

Parameter

startIndex

Int32

[out] Referensi bilangan bulat yang diberikan ke parameter ini menerima indeks titik yang memulai subjalur.

endIndex

Int32

[out] Referensi bilangan bulat yang diberikan ke parameter ini menerima indeks titik yang mengakhiri subjalur yang startIndex menunjuk.

Mengembalikan

Int32

Jumlah titik antara penanda ini dan yang berikutnya.

Contoh

Contoh berikut dirancang untuk digunakan dengan Formulir Windows, dan memerlukan PaintEventArgse, OnPaint objek peristiwa. Kode melakukan tindakan berikut:

• GraphicsPath Membuat objek.

• Menambahkan tiga baris, persegi panjang, dan elips 3/4 dengan penanda di antara masing-masing baris.

• Menggambar nilai untuk array titik ke layar.

• GraphicsPathIterator Membuat objek.

• NextMarker Memanggil metode .

• Menggunakan nilai yang dikembalikan dari panggilan berulang ke NextMarker untuk menggambar titik mulai dan berhenti untuk setiap penanda ke layar.

• Menggambar nilai untuk jumlah total titik ke layar.

private:
   void NextMarkerExample( PaintEventArgs^ e )
   {
      // Create the GraphicsPath.
      GraphicsPath^ myPath = gcnew GraphicsPath;
      array<Point>^ myPoints = {Point(20,20),Point(120,120),Point(20,120),Point(20,20)};
      Rectangle myRect = Rectangle(120,120,100,100);

      // Add 3 lines, a rectangle, an ellipse, and 2 markers.
      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 the arrays of the points and types.
      int myPathPointCount = myPath->PointCount;
      array<PointF>^myPathPoints = myPath->PathPoints;
      array<Byte>^myPathTypes = myPath->PathTypes;

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

      // Draw the set of path points and types to 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.
      GraphicsPathIterator^ myPathIterator = gcnew GraphicsPathIterator( myPath );
      int myStartIndex;
      int myEndIndex;

      // Rewind the Iterator.
      myPathIterator->Rewind();

      // Draw the Markers and their start and end points
      // to the screen.
      j = 20;
      for ( i = 0; i < 3; i++ )
      {
         myPathIterator->NextMarker( myStartIndex, myEndIndex );
         e->Graphics->DrawString( String::Format( "Marker {0}:  Start: {1}  End: {2}", i, myStartIndex, myEndIndex ),
               myFont, myBrush, 200, j );
         j += 20;
      }

      // Draw the total number of points to the screen.
      j += 20;
      int myPathTotalPoints = myPathIterator->Count;
      e->Graphics->DrawString( String::Format( "Total Points = {0}", myPathTotalPoints ), myFont, myBrush, 200, j );
   }

private void NextMarkerExample(PaintEventArgs e)
{
             
    // Create the GraphicsPath.
    GraphicsPath myPath = new GraphicsPath();
    Point[] myPoints = {new Point(20, 20), new Point(120, 120), 
        new Point(20, 120),new Point(20, 20) }; 

    Rectangle myRect = new Rectangle(120, 120, 100, 100);
             
    // Add 3 lines, a rectangle, an ellipse, and 2 markers.
    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 the arrays of the points and types.
    int myPathPointCount = myPath.PointCount;
    PointF[] myPathPoints = myPath.PathPoints;
    byte[] myPathTypes = myPath.PathTypes;
             
    // Set up variables for drawing the array
             
    // of points to the screen.
    int i;
    float j = 20;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
             
    // Draw the set of path points and types to 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.
    GraphicsPathIterator myPathIterator = new
        GraphicsPathIterator(myPath);
    int myStartIndex;
    int myEndIndex;
             
    // Rewind the Iterator.
    myPathIterator.Rewind();
             
    // Draw the Markers and their start and end points
             
    // to the screen.
    j=20;
    for(i=0;i<3;i++)
    {
        myPathIterator.NextMarker(out myStartIndex, out myEndIndex);
        e.Graphics.DrawString("Marker " + i.ToString() +
            ":  Start: " + myStartIndex.ToString()+
            "  End: " + myEndIndex.ToString(),
            myFont,
            myBrush,
            200,
            j);
        j += 20;
    }
             
    // Draw the total number of points to the screen.
    j += 20;
    int myPathTotalPoints = myPathIterator.Count;
    e.Graphics.DrawString("Total Points = " +
        myPathTotalPoints.ToString(),
        myFont,
        myBrush,
        200,
        j);
}

Public Sub NextMarkerExample(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, an ellipse, and 2 markers.
    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 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 array of 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)

    ' 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, 20, j)
        j += 20
    Next i

    ' Create a GraphicsPathIterator.
    Dim myPathIterator As New GraphicsPathIterator(myPath)
    Dim myStartIndex As Integer
    Dim myEndIndex As Integer

    ' Rewind the Iterator.
    myPathIterator.Rewind()

    ' Draw the Markers and their start and end points to the screen.
    j = 20
    For i = 0 To 2
        myPathIterator.NextMarker(myStartIndex, myEndIndex)
        e.Graphics.DrawString("Marker " + i.ToString() + _
            ":  Start: " + myStartIndex.ToString() + "  End: " + _
            myEndIndex.ToString(), myFont, myBrush, 200, j)
        j += 20
    Next i

    ' Draw the total number of points to the screen.
    j += 20
    Dim myPathTotalPoints As Integer = myPathIterator.Count
    e.Graphics.DrawString("Total Points = " + _
        myPathTotalPoints.ToString(), myFont, myBrush, 200, j)
End Sub

Keterangan

SetMarkers Gunakan metode untuk mengatur penanda di jalur. Penanda digunakan untuk membuat grup subjalur. Satu atau beberapa subpath dapat berada di antara dua penanda.