Stroke.GetGeometry Method (DrawingAttributes)

Gets the Geometry of the current Stroke using the specified DrawingAttributes.

Namespace:  System.Windows.Ink
Assembly:  PresentationCore (in PresentationCore.dll)

public Geometry GetGeometry(
	DrawingAttributes drawingAttributes
)

Parameters

drawingAttributes
Type: System.Windows.Ink.DrawingAttributes

The DrawingAttributes that determines the Geometry of the Stroke.

Return Value

Type: System.Windows.Media.Geometry
A Geometry that represents the Stroke.

The GetGeometry method uses the Width, Height, FitToCurve, StylusTip and StylusTipTransform properties of drawingAttributes to determine the Geometry. Consider caching the Geometry to avoid calling GetGeometry multiple times, which may impact performance.

The following example demonstrates how to draw a circle at each StylusPoint of a Stroke. If the FitToCurve property is set to true, the GetBezierStylusPoints is used to get the stylus points. Otherwise, the StylusPoints property is used.

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);
    }

}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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