Stroke.DrawCore(DrawingContext, DrawingAttributes) 方法

定義

命名空間:

System.Windows.Ink

組件:

PresentationCore.dll

使用指定的 Stroke 將 DrawingContext 呈現於指定的 DrawingAttributes 上。

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)

參數

drawingContext

DrawingContext

DrawingContext 物件，筆劃將呈現於其中。

drawingAttributes

DrawingAttributes

定義繪製之筆劃屬性的 DrawingAttributes 物件。

範例

下列範例示範如何在每個 StylusPoint Stroke 上繪製圓形。 FitToCurve如果 屬性設定為 true ，則會 GetBezierStylusPoints 使用 來取得手寫筆點。 否則，會 StylusPoints 使用 屬性。

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

備註

覆寫 方法， DrawCore 以在繼承自 Stroke 類別時執行自訂繪圖。