GraphicsPath.Reset-Methode

Leert das PathPoints-Array und das PathTypes-Array und legt FillMode auf Alternate fest.

Namespace: System.Drawing.Drawing2D
Assembly: System.Drawing (in system.drawing.dll)

Syntax

'Declaration
Public Sub Reset
'Usage
Dim instance As GraphicsPath

instance.Reset

public void Reset ()

public:
void Reset ()

public void Reset ()

public function Reset ()

Beispiel

Das folgende Codebeispiel ist für die Verwendung mit Windows Forms vorgesehen und erfordert das OnPaint-Ereignisobjekt PaintEventArgse. Der Code führt die folgenden Aktionen aus:

Erstellt einen Pfad.
Fügt diesem mehrere geometrische Grundformen hinzu.
Zeichnet das Punktearray des Pfads auf dem Bildschirm.
Setzt den Pfad auf einen leeren Zustand zurück.
Das Punktearray wird erneut abgerufen, sofern vorhanden.
Zeichnet das Array auf dem Bildschirm.

Beachten Sie, dass nach dem Zurücksetzen des Pfads kein Array gefunden wird.

Public Sub GraphicsPathResetExample(ByVal e As PaintEventArgs)
    Dim myFont As New Font("Arial", 8)

    ' Create a path and add a line, an ellipse, and an arc.
    Dim myPath As New GraphicsPath
    myPath.AddLine(New Point(0, 0), New Point(100, 100))
    myPath.AddEllipse(100, 100, 200, 250)
    myPath.AddArc(300, 250, 100, 100, 0, 90)

    ' Draw the pre-reset points array to the screen.
    DrawPointsHelper1(e, myPath.PathPoints, 20)

    ' Reset the path.
    myPath.Reset()

    ' See if any points remain.
    If myPath.PointCount > 0 Then

        ' Draw the post-reset points array to the screen.
        DrawPointsHelper1(e, myPath.PathPoints, 150)

        ' If there are no points, say so.
    Else
        e.Graphics.DrawString("No Points", myFont, Brushes.Black, _
        150, 20)
    End If
End Sub

' A helper function used by GraphicsPathResetExample to draw points.
Public Sub DrawPointsHelper1(ByVal e As PaintEventArgs, _
ByVal pathPoints() As PointF, ByVal xOffset As Integer)
    Dim y As Integer = 20
    Dim myFont As New Font("Arial", 8)
    Dim i As Integer
    For i = 0 To pathPoints.Length - 1
        e.Graphics.DrawString(pathPoints(i).X.ToString() + _
        ", " + pathPoints(i).Y.ToString(), myFont, Brushes.Black, _
        xOffset, y)
        y += 20
    Next i
End Sub

public void GraphicsPathResetExample(PaintEventArgs e)
{
    Font myFont = new Font("Arial", 8);
             
    // Create a path and add a line, an ellipse, and an arc.
    GraphicsPath myPath = new GraphicsPath();
    myPath.AddLine(new Point(0, 0), new Point(100, 100));
    myPath.AddEllipse(100, 100, 200, 250);
    myPath.AddArc(300, 250, 100, 100, 0, 90);
             
    // Draw the pre-reset points array to the screen.
    DrawPoints1(e, myPath.PathPoints, 20);
             
    // Reset the path.
    myPath.Reset();
             
    // See if any points remain.
    if(myPath.PointCount > 0)
    {
             
        // Draw the post-reset points array to the screen.
        DrawPoints1(e, myPath.PathPoints, 150);
    }
    else
             
        // If there are no points, say so.
        e.Graphics.DrawString("No Points",
            myFont,
            Brushes.Black,
            150,
            20);
} 
//End GraphicsPathResetExample
             
// A helper function GraphicsPathResetExample uses to draw the points.
             
// to the screen.
public void DrawPoints1(PaintEventArgs e, PointF[] pathPoints, int xOffset)
{
    int y = 20;
    Font myFont = new Font("Arial", 8);
    for(int i=0;i < pathPoints.Length; i++)
    {
        e.Graphics.DrawString(pathPoints[i].X.ToString() + ", " +
            pathPoints[i].Y.ToString(),
            myFont,
            Brushes.Black,
            xOffset,
            y);
        y += 20;
    }
} 
// End DrawPoints

public:
   void GraphicsPathResetExample( PaintEventArgs^ e )
   {
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8 );
      
      // Create a path and add a line, an ellipse, and an arc.
      GraphicsPath^ myPath = gcnew GraphicsPath;
      myPath->AddLine( Point(0,0), Point(100,100) );
      myPath->AddEllipse( 100, 100, 200, 250 );
      myPath->AddArc( 300, 250, 100, 100, 0, 90 );
      
      // Draw the pre-reset points array to the screen.
      DrawPoints1( e, myPath->PathPoints, 20 );
      
      // Reset the path.
      myPath->Reset();
      
      // See if any points remain.
      if ( myPath->PointCount > 0 )
      {
         
         // Draw the post-reset points array to the screen.
         DrawPoints1( e, myPath->PathPoints, 150 );
      }
      else
            e->Graphics->DrawString( "No Points", myFont, Brushes::Black, 150, 20 );
      // If there are no points, say so.
   }


   //End GraphicsPathResetExample
   // A helper function GraphicsPathResetExample uses to draw the points.
   // to the screen.
   void DrawPoints1( PaintEventArgs^ e, array<PointF>^ pathPoints, int xOffset )
   {
      int y = 20;
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8 );
      for ( int i = 0; i < pathPoints->Length; i++ )
      {
         e->Graphics->DrawString( String::Concat( pathPoints[ i ].X, ", ", pathPoints[ i ].Y ), myFont, Brushes::Black, (float)xOffset, (float)y );
         y += 20;

      }
   }
   // End DrawPoints

public void GraphicsPathResetExample(PaintEventArgs e)
{
    Font myFont = new Font("Arial", 8);

    // Create a path and add a line, an ellipse, and an arc.
    GraphicsPath myPath = new GraphicsPath();

    myPath.AddLine(new Point(0, 0), new Point(100, 100));
    myPath.AddEllipse(100, 100, 200, 250);
    myPath.AddArc(300, 250, 100, 100, 0, 90);

    // Draw the pre-reset points array to the screen.
    DrawPoints1(e, myPath.get_PathPoints(), 20);

    // Reset the path.
    myPath.Reset();

    // See if any points remain.
    if (myPath.get_PointCount() > 0) {
        // Draw the post-reset points array to the screen.
        DrawPoints1(e, myPath.get_PathPoints(), 150);
    }
    // If there are no points, say so.
    else {
        e.get_Graphics().DrawString("No Points", myFont,
            Brushes.get_Black(), 150, 20);
    }
} //GraphicsPathResetExample
//End GraphicsPathResetExample

// A helper function GraphicsPathResetExample uses to draw the points.

// to the screen.
public void DrawPoints1(PaintEventArgs e, PointF pathPoints[], int xOffset)
{
    int y = 20;
    Font myFont = new Font("Arial", 8);

    for (int i = 0; i < pathPoints.length; i++) {
        e.get_Graphics().DrawString(
            System.Convert.ToString(pathPoints[i].get_X())  
            + ", " + System.Convert.ToString(pathPoints[i].get_Y()), myFont, 
            Brushes.get_Black(), xOffset, y);
        y += 20;
    }
} //DrawPoints1
// End DrawPoints

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

GraphicsPath-Klasse
GraphicsPath-Member
System.Drawing.Drawing2D-Namespace

Last updated on 2007-08-20

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