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ArcSegment.Point Property

Gets or sets the endpoint of the elliptical arc.

Namespace: System.Windows.Media
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public Point Point { get; set; }
/** @property */
public Point get_Point ()

/** @property */
public void set_Point (Point value)

public function get Point () : Point

public function set Point (value : Point)

<object>
  <object.Point>
    <Point .../>
  </object.Point>
</object>
<object Point="Point" .../>

Property Value

The point to which the arc is drawn. The default value is (0,0).

The ArcSegment class defines only the destination point of the arc it represents; the beginning point of the arc is the current point of the PathFigure to which the ArcSegment is added.

If the arc segment's start point and end point are the same, no arc is drawn.

For most arcs of a particular position, size, and rotation, there are four different arcs that can be drawn; the IsLargeArc and SweepDirection properties indicate which arc to use.

Of the four candidate arc sweeps, two represent large arcs with sweeps of 180 degrees or greater, and two represent smaller arcs with sweeps 180 degrees or less. If IsLargeArc is true, then one of the two larger arc sweeps is chosen; otherwise, if is false, one of the smaller arc sweeps is chosen. The remaining two arc candidates are each drawn in a different direction: Counterclockwise or Clockwise. The SweepDirection property specifies which one to use.

The following illustration shows several elliptical arcs that are identical except for their Point settings.

Several ArcSegment objects with different Point settings


ArcSegments with different Point settings

This example shows how to draw an elliptical arc. To create an elliptical arc, use the PathGeometry, PathFigure, and ArcSegment classes.

In the following examples, an elliptical arc is drawn from (10,100) to (200,100). The arc has a Size of 100 by 50 device-independent pixels, a RotationAngle of 45 degrees, an IsLargeArc setting of true, and a SweepDirection of Counterclockwise.

In Extensible Application Markup Language (XAML), you can use attribute syntax to describe a path.

<Path Stroke="Black" StrokeThickness="1"  
  Data="M 10,100 A 100,50 45 1 0 200,100" />

(Note that this attribute syntax actually creates a StreamGeometry, a lighter-weight version of a PathGeometry. For more information, see the Path Markup Syntax page.)

In XAML, you can also draw an elliptical arc by explicitly using object tags. The following is equivalent to the preceding XAML markup.

<Path Stroke="Black" StrokeThickness="1">
  <Path.Data>
    <PathGeometry>
      <PathGeometry.Figures>
        <PathFigureCollection>
          <PathFigure StartPoint="10,100">
            <PathFigure.Segments>
              <PathSegmentCollection>
                <ArcSegment Size="100,50" RotationAngle="45" IsLargeArc="True" SweepDirection="CounterClockwise" Point="200,100" />
              </PathSegmentCollection>
            </PathFigure.Segments>
          </PathFigure>
        </PathFigureCollection>
      </PathGeometry.Figures>
    </PathGeometry>
  </Path.Data>
</Path>

This example is part of a larger sample. For the complete sample, see the Geometries Sample.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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