GraphicsPathIterator.NextPathType メソッド

.NET Framework クラス ライブラリ リファレンス

GraphicsPathIterator.NextPathType メソッド

すべてが同じ種類のデータ点から成る次のグループの開始インデックスと終了インデックスを取得します。

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 Function NextPathType ( _
    <OutAttribute> ByRef pathType As
 Byte, _
    <OutAttribute> ByRef startIndex As
 Integer, _
    <OutAttribute> ByRef endIndex As
 Integer _
) As Integer

Visual Basic (使用法)

Dim instance As GraphicsPathIterator
Dim pathType As Byte
Dim startIndex As Integer
Dim endIndex As Integer
Dim returnValue As Integer

returnValue = instance.NextPathType(pathType, startIndex, endIndex)

C#

public int NextPathType (
    out byte pathType,
    out int startIndex,
    out int endIndex
)

C++

public:
int NextPathType (
    [OutAttribute] unsigned char% pathType, 
    [OutAttribute] int% startIndex, 
    [OutAttribute] int% endIndex
)

J#

public int NextPathType (
    /** @attribute OutAttribute() */ /** @ref */ byte pathType, 
    /** @attribute OutAttribute() */ /** @ref */ int startIndex,
 
    /** @attribute OutAttribute() */ /** @ref */ int endIndex
)

JScript

JScript では、値型の引数は参照渡しされません。

パラメータ

pathType

[出力] グループのすべてのポイントで共有されるポイント タイプを受け取ります。返される可能性があるタイプは、PathPointType 列挙体から取得できます。

startIndex

[出力] ポイント グループの開始インデックスを受け取ります。

endIndex

[出力] ポイント グループの終了インデックスを受け取ります。

戻り値
このメソッドは、グループ内のデータ点の数を返します。パスにそれ以上グループがない場合は、0 を返します。

使用例

次の例は、Windows フォームでの使用を意図してデザインされており、OnPaint イベントの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。

• GraphicsPath オブジェクトを作成します。

• 3 本の直線、1 つの四角形、および 1 つの楕円を追加します。

• すべての点の値を画面の左側に一覧表示します。

• GraphicsPathIterator を作成し、そのオブジェクトが指す位置を先頭に戻します。

• for ループ内で、NextPathType メソッドと NextPathType メソッドを使用して点を反復処理します。

• 反復呼び出しによって返された値を使用して、サブパス番号、その中に含まれる点の数、およびパス内の点の種類を画面の右側に一覧表示します。

• 画面に点の合計数を表す値を表示します。

ListPathPoints はヘルパ関数であり、すべてではありませんが、ほとんどの表示コードをグラフィックス パス コードから切り離します。

Visual Basic

Public Sub NextPathTypeExample(ByVal
 e As PaintEventArgs)

    ' Create the GraphicsPath.
    Dim myPath As New GraphicsPath
    Dim myPoints As Point() = {New Point(20,
 20), _
    New Point(120, 120), New Point(20, 120),
 New Point(20, 20)}
    Dim myRect As New Rectangle(120,
 120, 100, 100)

    ' Add 3 lines, a rectangle, and an ellipse.
    myPath.AddLines(myPoints)
    myPath.AddRectangle(myRect)
    myPath.AddEllipse(220, 220, 100, 100)

    ' List all of the path points to the screen.
    ListPathPointsHelper(e, myPath, Nothing, 20, 1)

    ' Create a GraphicsPathIterator.
    Dim myPathIterator As New
 GraphicsPathIterator(myPath)

    ' Rewind the Iterator.
    myPathIterator.Rewind()

    ' Iterate the subpaths and types, and list the results
    ' to the screen.
    Dim j As Integer = 20
    Dim i As Integer
    Dim mySubPaths, subPathStartIndex, subPathEndIndex As
 Integer
    Dim IsClosed As [Boolean]
    Dim subPathPointType As Byte
    Dim pointTypeStartIndex, pointTypeEndIndex, _
    numPointsFound As Integer
    Dim myFont As New Font("Arial",
 8)
    Dim myBrush As New SolidBrush(Color.Black)
    j = 20
    For i = 0 To 2
        mySubPaths = myPathIterator.NextSubpath(subPathStartIndex, _
            subPathEndIndex, IsClosed)
        numPointsFound = myPathIterator.NextPathType(subPathPointType, _
            pointTypeStartIndex, pointTypeEndIndex)
        e.Graphics.DrawString("SubPath: " & i
 & "  Points Found: " & _
            numPointsFound.ToString() & "  Type of Points:
 " & _
        subPathPointType.ToString(), myFont, myBrush, 200, j)
        j += 20
    Next i

    ' List the total number of path points to the screen.
    ListPathPointsHelper(e, myPath, myPathIterator, 200, 2)
End Sub

' This is a helper function used by NextPathTypeExample.
Public Sub ListPathPointsHelper(ByVal
 e As PaintEventArgs, _
ByVal myPath As GraphicsPath, ByVal
 myPathIterator As GraphicsPathIterator, _
ByVal xOffset As Integer,
 ByVal listType As Integer)

    ' Get the total number of points for the path,
    ' and the arrays of the points and types.
    Dim myPathPointCount As Integer
 = myPath.PointCount
    Dim myPathPoints As PointF() = myPath.PathPoints
    Dim myPathTypes As Byte()
 = myPath.PathTypes

    ' Set up variables for drawing the points to the screen.
    Dim i As Integer
    Dim j As Single = 20
    Dim myFont As New Font("Arial",
 8)
    Dim myBrush As New SolidBrush(Color.Black)
    If listType = 1 Then
        ' List all the path points to the screen.

        ' Draw the set of path points and types to the screen.
        For i = 0 To myPathPointCount - 1
            e.Graphics.DrawString(myPathPoints(i).X.ToString() + ",
 " + _
                myPathPoints(i).Y.ToString() + ", "
 + _
            myPathTypes(i).ToString(), myFont, myBrush, xOffset, j)
            j += 20
        Next i
    Else
        If listType = 2 Then
            ' Display the total number of path points.

            ' Draw the total number of points to the screen.
            Dim myPathTotalPoints As Integer
 = myPathIterator.Count
            e.Graphics.DrawString("Total Points = "
 + _
                myPathTotalPoints.ToString(), myFont, myBrush, xOffset, _
                100)
        Else
            e.Graphics.DrawString("Wrong or no list type argument.",
 _
                myFont, myBrush, xOffset, 200)
        End If
    End If
End Sub

C#

public void NextPathTypeExample(PaintEventArgs
 e)
{
             
    // Create the GraphicsPath.
    GraphicsPath myPath = new GraphicsPath();

    Point[] myPoints = {new Point(20, 20), new
 Point(120, 120), 
         new Point(20, 120),new Point(20, 20)
 }; 
    Rectangle myRect = new Rectangle(120, 120, 100, 100);
             
    // Add 3 lines, a rectangle, and an ellipse.
    myPath.AddLines(myPoints);
    myPath.AddRectangle(myRect);
    myPath.AddEllipse(220, 220, 100, 100);
             
    // List all of the path points to the screen.
    ListPathPoints(e, myPath, null, 20, 1);
             
    // Create a GraphicsPathIterator.
    GraphicsPathIterator myPathIterator = new
        GraphicsPathIterator(myPath);
             
    // Rewind the Iterator.
    myPathIterator.Rewind();
             
    // Iterate the subpaths and types, and list the results to
             
    // the screen.
    int i, j = 20;
    int mySubPaths, subPathStartIndex, subPathEndIndex;
    Boolean IsClosed;
    byte subPathPointType;
    int pointTypeStartIndex,  pointTypeEndIndex, numPointsFound;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
    j = 20;
    for(i = 0;i < 3; i++)
    {
        mySubPaths = myPathIterator.NextSubpath(
            out subPathStartIndex,
            out subPathEndIndex,
            out IsClosed);
        numPointsFound = myPathIterator.NextPathType(
            out subPathPointType,
            out pointTypeStartIndex,
            out pointTypeEndIndex);
        e.Graphics.DrawString(
            "SubPath: " + i +
            "  Points Found: " + numPointsFound.ToString() +
            "  Type of Points: " + subPathPointType.ToString(),
            myFont,
            myBrush,
            200,
            j);
        j+=20;
    }
             
    // List the total number of path points to the screen.
    ListPathPoints(e, myPath, myPathIterator, 200, 2);
}
             
//-------------------------------------------------------
//This function is a helper function used by
// NextPathTypeExample.
//-------------------------------------------------------
public void ListPathPoints(
    PaintEventArgs e,
    GraphicsPath myPath,
    GraphicsPathIterator myPathIterator,
    int xOffset,
    int listType)
{
             
    // Get the total number of points for the path,
    // and the arrays of the points and types.
    int myPathPointCount = myPath.PointCount;
    PointF[] myPathPoints = myPath.PathPoints;
    byte[] myPathTypes = myPath.PathTypes;
             
    // Set up variables for drawing the points to the screen.
    int i;
    float j = 20;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
    if (listType == 1) 
        // List all the path points to the screen.
    {
             
        // Draw the set of path points and types to the screen.
        for(i=0; i<myPathPointCount; i++)
        {
            e.Graphics.DrawString(myPathPoints[i].X.ToString()+
                ", " + myPathPoints[i].Y.ToString() + ", " +
                myPathTypes[i].ToString(),
                myFont,
                myBrush,
                xOffset,
                j);
            j+=20;
        }
    }
    else if (listType == 2) 
        // Display the total number of path points.
    {
             
        // Draw the total number of points to the screen.
        int myPathTotalPoints = myPathIterator.Count;
        e.Graphics.DrawString("Total Points = " +
            myPathTotalPoints.ToString(),
            myFont,
            myBrush,
            xOffset,
            100);
    }
    else
    {
        e.Graphics.DrawString("Wrong or no list type argument.",
            myFont, myBrush, xOffset, 200);
    }
}

C++

public:
   void NextPathTypeExample( PaintEventArgs^ e )
   {
      // Create the GraphicsPath.
      GraphicsPath^ myPath = gcnew GraphicsPath;
      array<Point>^ myPoints = {Point(20,20),Point(120,120),Point(20,120),Point(20
,20)};
      Rectangle myRect = Rectangle(120,120,100,100);

      // Add 3 lines, a rectangle, and an ellipse.
      myPath->AddLines( myPoints );
      myPath->AddRectangle( myRect );
      myPath->AddEllipse( 220, 220, 100, 100 );

      // List all of the path points to the screen.
      ListPathPoints( e, myPath, nullptr, 20, 1 );

      // Create a GraphicsPathIterator.
      GraphicsPathIterator^ myPathIterator = gcnew GraphicsPathIterator( myPath );

      // Rewind the Iterator.
      myPathIterator->Rewind();

      // Iterate the subpaths and types, and list the results to
      // the screen.
            int i;
      int j = 20;
      int mySubPaths;
      int subPathStartIndex;
      int subPathEndIndex;
      Boolean IsClosed;
      Byte subPathPointType;
      int pointTypeStartIndex;
      int pointTypeEndIndex;
      int numPointsFound;
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8
 );
      SolidBrush^ myBrush = gcnew SolidBrush( Color::Black );
      j = 20;
      for ( i = 0; i < 3; i++ )
      {
         mySubPaths = myPathIterator->NextSubpath( subPathStartIndex, subPathEndIndex,
 IsClosed );
         numPointsFound = myPathIterator->NextPathType( subPathPointType, pointTypeStartIndex,
 pointTypeEndIndex );
         e->Graphics->DrawString( String::Format( "SubPath: {0}  Points
 Found: {1}  Type of Points: {2}", i,
               numPointsFound, subPathPointType ), myFont, myBrush, 200.0f, (float)j
 );
         j += 20;
      }

      // List the total number of path points to the screen.
      ListPathPoints( e, myPath, myPathIterator, 200, 2 );
   }

   //-------------------------------------------------------
   //This function is a helper function used by
   // NextPathTypeExample.
   //-------------------------------------------------------
   void ListPathPoints( PaintEventArgs^ e, GraphicsPath^ myPath,
 GraphicsPathIterator^ myPathIterator, int xOffset, int
 listType )
   {
      // Get the total number of points for the path,
      // and the arrays of the points and types.
      int myPathPointCount = myPath->PointCount;
      array<PointF>^myPathPoints = myPath->PathPoints;
      array<Byte>^myPathTypes = myPath->PathTypes;

      // Set up variables for drawing the points to the screen.
      int i;
      float j = 20;
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8
 );
      SolidBrush^ myBrush = gcnew SolidBrush( Color::Black );
      if ( listType == 1 )
      {
         // Draw the set of path points and types to the screen.
         for ( i = 0; i < myPathPointCount; i++ )
         {
            e->Graphics->DrawString( myPathPoints[ i ].X + ", " +
 myPathPoints[ i ].Y + ", " + myPathTypes[ i ],
                  myFont, myBrush, (float)xOffset, (float)j
 );
            j += 20;
         }
      }
      else
      if ( listType == 2 )
      {
         // Draw the total number of points to the screen.
         int myPathTotalPoints = myPathIterator->Count;
         e->Graphics->DrawString( String::Format( "Total Points = {0}",
 myPathTotalPoints ), myFont, myBrush, (float)xOffset, 100.0f
 );
      }
      else
      {
         e->Graphics->DrawString( "Wrong or no list type argument.",
 myFont, myBrush, (float)xOffset, 200.0f );
      }
   }

J#

public void NextPathTypeExample(PaintEventArgs
 e)
{
    // Create the GraphicsPath.
    GraphicsPath myPath = new GraphicsPath();
    Point myPoints[] = { new Point(20, 20), new
 Point(120, 120), 
                        new Point(20, 120), new
 Point(20, 20) };
    Rectangle myRect = new Rectangle(120, 120, 100, 100);

    // Add 3 lines, a rectangle, and an ellipse.
    myPath.AddLines(myPoints);
    myPath.AddRectangle(myRect);
    myPath.AddEllipse(220, 220, 100, 100);

    // List all of the path points to the screen.
    ListPathPoints(e, myPath, null, 20, 1);

    // Create a GraphicsPathIterator.
    GraphicsPathIterator myPathIterator = new GraphicsPathIterator(myPath);

    // Rewind the Iterator.
    myPathIterator.Rewind();

    // Iterate the subpaths and types, and list the results to
    // the screen.
    int j = 20;
    int i;
    int mySubPaths, subPathStartIndex=0, subPathEndIndex=0;
    boolean IsClosed = false;
    ubyte subPathPointType = 0;
    int pointTypeStartIndex=0, pointTypeEndIndex=0, numPointsFound;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.get_Black());

    j = 20;
    for (i = 0; i < 3; i++) {
        mySubPaths = myPathIterator.NextSubpath(subPathStartIndex, 
            subPathEndIndex, IsClosed);
        numPointsFound = myPathIterator.NextPathType(subPathPointType, 
            pointTypeStartIndex, pointTypeEndIndex);
        e.get_Graphics().DrawString("SubPath: " + i + "  Points Found:
 " 
            + System.Convert.ToString(numPointsFound) 
            + "  Type of Points: " 
            + System.Convert.ToString(subPathPointType),
            myFont, myBrush, 200, j);
        j += 20;
    }

    // List the total number of path points to the screen.
    ListPathPoints(e, myPath, myPathIterator, 200, 2);
} //NextPathTypeExample

//-------------------------------------------------------
//This function is a helper function used by
// NextPathTypeExample.
//-------------------------------------------------------
public void ListPathPoints(PaintEventArgs e,
 GraphicsPath myPath, 
    GraphicsPathIterator myPathIterator, int xOffset, int
 listType)
{
    // Get the total number of points for the path,
    // and the arrays of the points and types.
    int myPathPointCount = myPath.get_PointCount();
    PointF myPathPoints[] = myPath.get_PathPoints();
    ubyte myPathTypes[] = myPath.get_PathTypes();

    // Set up variables for drawing the points to the screen.
    int i;
    float j = 20;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.get_Black());

    if (listType == 1) {
        // List all the path points to the screen.
        // Draw the set of path points and types to the screen.
        for (i = 0; i < myPathPointCount; i++) {
            e.get_Graphics().DrawString(System.Convert.ToString(
                myPathPoints[i].get_X()) + ", "  
                + System.Convert.ToString(myPathPoints[i].get_Y()) + ", "
  
                + myPathTypes.get_Item(i).ToString(), myFont, myBrush, 
                xOffset, j);
            j += 20;
        }
    }
    else {
        if (listType == 2) {
            // Display the total number of path points.
            // Draw the total number of points to the screen.
            int myPathTotalPoints = myPathIterator.get_Count();

            e.get_Graphics().DrawString("Total Points = " 
                + System.Convert.ToString(myPathTotalPoints), myFont, 
                myBrush, xOffset, 100);
        }
        else {
            e.get_Graphics().DrawString("Wrong or no list type argument.",
 
                myFont, myBrush, xOffset, 200);
        }
    }
} //ListPathPoints

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
GraphicsPathIterator クラス
GraphicsPathIterator メンバ
System.Drawing.Drawing2D 名前空間