GraphicsPath.Reset 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

PathPoints 配列と PathTypes 配列を空にし、FillMode を Alternateに設定します。

public:
 void Reset();

public void Reset ();

member this.Reset : unit -> unit

Public Sub Reset ()

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。

• パスを作成します。

• 複数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。

• パスを空の状態にリセットします。

• ポイント配列を取得し直します (存在する場合)。

• 配列を画面に描画します。

リセット呼び出しの後に配列が見つからないことに注意してください。

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