GraphicsPath.Reset Méthode

Définition

Vide les tableaux PathPoints et PathTypes et assigne la valeur FillMode à Alternate.Empties the PathPoints and PathTypes arrays and sets the FillMode to Alternate.

public:
 void Reset();
public void Reset ();
member this.Reset : unit -> unit
Public Sub Reset ()

Exemples

L’exemple de code suivant est conçu pour être utilisé avec Windows Forms, et il requiert PaintEventArgse, un objet d’événement OnPaint.The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, an OnPaint event object. Le code effectue les actions suivantes :The code performs the following actions:

  • Crée un chemin d’accès.Creates a path.

  • Y ajoute plusieurs Primitives.Adds several primitives to it.

  • Dessine le tableau de points du tracé à l’écran.Draws the path's points array to the screen.

  • Rétablit un état vide pour le chemin d’accès.Resets the path to an empty state.

  • Acquiert à nouveau le tableau de points (s’il existe).Re-acquires the points array (if it exists).

  • Dessine le tableau à l’écran.Draws the array to the screen.

Notez qu’il ne trouve aucun tableau après l’appel de réinitialisation.Notice that it finds no array following the reset call.

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.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 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

S’applique à