GraphicsPath.Reverse メソッド

定義

名前空間:

System.Drawing.Drawing2D

アセンブリ:

System.Drawing.Common.dll

パッケージ:

System.Drawing.Common v9.0.0-preview.6.24327.6

ソース:

GraphicsPath.cs

この GraphicsPathの PathPoints 配列内のポイントの順序を逆にします。

public:
 void Reverse();

public void Reverse ();

member this.Reverse : unit -> unit

Public Sub Reverse ()

例

次のコード例は、Windows フォームで使用できるように設計されており、OnPaint イベント オブジェクトである PaintEventArgseが必要です。 このコードは、次のアクションを実行します。

• パスを作成し、パスにいくつかのプリミティブを追加します。

• パスのポイント配列を画面に描画します。

• 反転したポイント配列を画面に描画します。

ポイントの 2 番目の一覧が最初のリストと逆の順序になっていることに注意してください。

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