GraphicsPath.Reset メソッド

.NET Framework クラス ライブラリ リファレンス

GraphicsPath.Reset メソッド

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

名前空間: System.Drawing.Drawing2D
アセンブリ: System.Drawing (system.drawing.dll 内)
構文

Visual Basic (宣言)

Public Sub Reset

Visual Basic (使用法)

Dim instance As GraphicsPath

instance.Reset

C#

public void Reset ()

C++

public:
void Reset ()

J#

public void Reset ()

JScript

public function Reset ()

使用例

次のコード例は、Windows フォームでの使用を意図してデザインされており、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。

• そのパスに複数のプリミティブを追加します。

• 画面にパスの点配列を描画します。

• パスを空の状態にリセットします。

• 点配列を再取得します (存在する場合)。

• 画面に配列を描画します。

リセット呼び出しの後は配列を見つけられなくなります。

Visual Basic

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

C#

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

C++

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

J#

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

プラットフォーム

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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
GraphicsPath クラス
GraphicsPath メンバ
System.Drawing.Drawing2D 名前空間