GraphicsPath.Reverse Méthode

Définition

Espace de noms:

System.Drawing.Drawing2D

Assembly:

System.Drawing.Common.dll

Paquet:

System.Drawing.Common v9.0.0-preview.5.24306.5

Source:

GraphicsPath.cs

Inverse l’ordre des points dans le tableau PathPoints de cette GraphicsPath.

public:
 void Reverse();

public void Reverse ();

member this.Reverse : unit -> unit

Public Sub Reverse ()

Exemples

L’exemple de code suivant est conçu pour être utilisé avec Windows Forms et nécessite PaintEventArgse, un objet d’événement OnPaint. Le code effectue les actions suivantes :

• Crée un chemin et ajoute plusieurs primitives au chemin.

• Dessine le tableau des points du chemin à l’écran.

• Dessine le tableau de points inversés à l’écran.

Notez que la deuxième liste de points est dans l’ordre inverse de la première.

void GraphicsPathReverseExample( PaintEventArgs^ e )
{
   // Create a path and add a line, ellipse, and 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 first set of points to the screen.
   DrawPoints2( e, myPath->PathPoints, 20 );

   // Call GraphicsPath.Reverse.
   myPath->Reverse();

   // Draw the reversed set of points to the screen.
   DrawPoints2( e, myPath->PathPoints, 150 );
}

//End GraphicsPathReverseExample.
// A helper function GraphicsPathReverseExample is used to draw the
// points to the screen.
void DrawPoints2( 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 GraphicsPathReverseExample(PaintEventArgs e)
{
             
    // Create a path and add a line, ellipse, and 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 first set of points to the screen.
    DrawPoints2(e, myPath.PathPoints, 20);
             
    // Call GraphicsPath.Reverse.
    myPath.Reverse();
             
    // Draw the reversed set of points to the screen.
    DrawPoints2(e, myPath.PathPoints, 150);
}
//End GraphicsPathReverseExample.
             
// A helper function GraphicsPathReverseExample is used to draw the
             
// points to the screen.
public void DrawPoints2(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 GraphicsPathReverseExample(ByVal e As PaintEventArgs)

    ' Create a path and add a line, ellipse, and 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 first set of points to the screen.
    DrawPointsHelper2(e, myPath.PathPoints, 20)

    ' Call GraphicsPath.Reverse.
    myPath.Reverse()

    ' Draw the reversed set of points to the screen.
    DrawPointsHelper2(e, myPath.PathPoints, 150)
End Sub

' A helper function used by GraphicsPathReverseExample to draw points.
Public Sub DrawPointsHelper2(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