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Stroke.GetGeometry Method

  • Reference

Definition

Namespace:
System.Windows.Ink
Assembly:
PresentationCore.dll

Gets the Geometry of the current Stroke.

Overloads

GetGeometry()

Gets the Geometry of the current Stroke.
GetGeometry(DrawingAttributes)

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

GetGeometry()

Gets the Geometry of the current Stroke.

public:
 System::Windows::Media::Geometry ^ GetGeometry();
public System.Windows.Media.Geometry GetGeometry ();
member this.GetGeometry : unit -> System.Windows.Media.Geometry
Public Function GetGeometry () As Geometry

Returns

Geometry

A Geometry that represents the Stroke.

Remarks

Use the GetGeometry method to get a PathGeometry to customize the shape of the Stroke. Consider caching the Geometry to avoid calling GetGeometry multiple times, which may impact performance.

Applies to

GetGeometry(DrawingAttributes)

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

public:
 System::Windows::Media::Geometry ^ GetGeometry(System::Windows::Ink::DrawingAttributes ^ drawingAttributes);
public System.Windows.Media.Geometry GetGeometry (System.Windows.Ink.DrawingAttributes drawingAttributes);
member this.GetGeometry : System.Windows.Ink.DrawingAttributes -> System.Windows.Media.Geometry
Public Function GetGeometry (drawingAttributes As DrawingAttributes) As Geometry

Parameters

drawingAttributes
DrawingAttributes

The DrawingAttributes that determines the Geometry of the Stroke.

Returns

Geometry

A Geometry that represents the Stroke.

Examples

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);
    }
}

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

Remarks

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.

Applies to