GraphicsPath.Reset Metode
Definisi
Penting
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Menginisiasi PathPoints array dan PathTypes dan mengatur ke FillModeAlternate.
public:
void Reset();
public void Reset ();
member this.Reset : unit -> unit
Public Sub Reset ()
Contoh
Contoh kode berikut dirancang untuk digunakan dengan Formulir Windows, dan memerlukan PaintEventArgse
, OnPaint objek peristiwa. Kode melakukan tindakan berikut:
Membuat jalur.
Menambahkan beberapa primitif ke dalamnya.
Menggambar array titik jalur ke layar.
Mereset jalur ke status kosong.
Memperoleh kembali array titik (jika ada).
Menggambar array ke layar.
Perhatikan bahwa ia tidak menemukan array setelah panggilan reset.
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
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