Stroke.DrawCore(DrawingContext, DrawingAttributes) Metode

Definisi

Ruang nama:

System.Windows.Ink

Rakitan:

PresentationCore.dll

Merender Stroke pada yang ditentukan DrawingContext menggunakan DrawingAttributes.

protected:
 virtual void DrawCore(System::Windows::Media::DrawingContext ^ drawingContext, System::Windows::Ink::DrawingAttributes ^ drawingAttributes);

protected virtual void DrawCore(System.Windows.Media.DrawingContext drawingContext, System.Windows.Ink.DrawingAttributes drawingAttributes);

abstract member DrawCore : System.Windows.Media.DrawingContext * System.Windows.Ink.DrawingAttributes -> unit
override this.DrawCore : System.Windows.Media.DrawingContext * System.Windows.Ink.DrawingAttributes -> unit

Protected Overridable Sub DrawCore (drawingContext As DrawingContext, drawingAttributes As DrawingAttributes)

Parameter

drawingContext

DrawingContext

Objek DrawingContext tempat goresan akan dirender.

drawingAttributes

DrawingAttributes

Objek DrawingAttributes yang menentukan atribut stroke yang digambar.

Contoh

Contoh berikut menunjukkan cara menggambar lingkaran di setiap StylusPointStroke. FitToCurve Jika properti diatur ke true, GetBezierStylusPoints digunakan untuk mendapatkan titik stylus. Jika tidak, StylusPoints properti digunakan.

protected override void DrawCore(DrawingContext context, DrawingAttributes overrides)
{
    // Draw the stroke. Calling base.DrawCore accomplishes the same thing.
    Geometry geometry = GetGeometry(overrides);
    context.DrawGeometry(new SolidColorBrush(overrides.Color), null, geometry);

    StylusPointCollection points;

    // Get the stylus points used to draw the stroke.  The points used depends on
    // the value of FitToCurve.
    if (this.DrawingAttributes.FitToCurve)
    {
        points = this.GetBezierStylusPoints();
    }
    else
    {
        points = this.StylusPoints;
    }

    // Draw a circle at each stylus point.
    foreach (StylusPoint p in points)
    {
        context.DrawEllipse(null, new Pen(Brushes.Black, 1), (Point)p, 5, 5);
    }
}

Protected Overrides Sub DrawCore(ByVal context As DrawingContext, _
        ByVal overridedAttributes As DrawingAttributes)

    ' Draw the stroke. Calling base.DrawCore accomplishes the same thing.
    Dim geometry As Geometry = GetGeometry(overridedAttributes)
    context.DrawGeometry(New SolidColorBrush(overridedAttributes.Color), Nothing, geometry)

    Dim points As StylusPointCollection

    ' Get the stylus points used to draw the stroke.  The points used depends on
    ' the value of FitToCurve.
    If Me.DrawingAttributes.FitToCurve Then
        points = Me.GetBezierStylusPoints()
    Else
        points = Me.StylusPoints
    End If

    ' Draw a circle at each stylus point.
    Dim p As StylusPoint
    For Each p In points
        context.DrawEllipse(Nothing, New Pen(Brushes.Black, 1), CType(p, Point), 5, 5)
    Next p

End Sub

Keterangan

Ambil alih DrawCore metode untuk melakukan gambar kustom saat Anda mewarisi dari Stroke kelas .