Статья
11/18/2011

PathFigure Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Represents a subsection of a geometry, a single connected series of two-dimensional geometric segments.

Inheritance Hierarchy

System.Object
System.Windows.DependencyObject
System.Windows.Media.PathFigure

Namespace: System.Windows.Media
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
<ContentPropertyAttribute("Segments", True)> _
Public NotInheritable Class PathFigure _
    Inherits DependencyObject

[ContentPropertyAttribute("Segments", true)]
public sealed class PathFigure : DependencyObject

<PathFigure .../>
-or-
<PathFigure ...>
  oneOrMorePathSegments
</PathFigure

XAML Values

oneOrMorePathSegments
One or more object elements that derive from PathSegment: typically these are ArcSegment, BezierSegment, LineSegment, PolyBezierSegment, PolyQuadraticBezierSegment, or QuadraticBezierSegment. Object elements defined here become members of the PathSegmentCollection when code accesses the Segments property at run time.

The PathFigure type exposes the following members.

Constructors

	Name	Description
	PathFigure	Initializes a new instance of the PathFigure class.

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Properties

	Name	Description
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
	IsClosed	Gets or sets a value that indicates whether this figure's first and last segments are connected.
	IsFilled	Gets or sets a value that indicates whether the contained area of this PathFigure is to be used for hit-testing, rendering, and clipping.
	Segments	Gets or sets the collection of segments that define the shape of this PathFigure object.
	StartPoint	Gets or sets the Point where the PathFigure begins.

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Methods

	Name	Description
	CheckAccess	Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
	ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetAnimationBaseValue	Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
	SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Fields

	Name	Description
	IsClosedProperty	Identifies the IsClosed dependency property.
	IsFilledProperty	Identifies the IsFilled dependency property.
	SegmentsProperty	Identifies the Segments dependency property.
	StartPointProperty	Identifies the StartPoint dependency property.

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Remarks

The defining property of a PathFigure is its StartPoint, because it specifies the point from which the first contained line segment starts.

If you want a geometry where various figures are not connected to one another, you would specify multiple PathFigure objects within the PathFigureCollection, each with different StartPoint values.

Examples

The following example creates a simple PathGeometry made up of a single PathFigure with a LineSegment and displays it using a Path element. The PathFigure object's StartPoint is set to 10,20 and a LineSegment is defined with an end point of 100,130. The following illustration shows the PathGeometry created by this example.

A PathGeometry that contains a single LineSegment

Diagonal line.

<Canvas>
  <Path Stroke="Black" StrokeThickness="1">
    <Path.Data>
      <PathGeometry>
        <PathGeometry.Figures>
          <PathFigure StartPoint="10,20">
            <PathFigure.Segments>
              <LineSegment Point="100,130"/>
            </PathFigure.Segments>
          </PathFigure>
        </PathGeometry.Figures>
      </PathGeometry>
    </Path.Data>
  </Path>
</Canvas>

This example uses multiple segments in a PathFigure.

A PathGeometry

Pathfigure

<Canvas>
  <Path Stroke="Black" StrokeThickness="1" >
    <Path.Data>
      <PathGeometry>
        <PathGeometry.Figures>
          <PathFigure StartPoint="10,50">
            <PathFigure.Segments>
              <BezierSegment Point1="100,0"
                Point2="200,200"
                Point3="300,100"/>
              <LineSegment Point="400,100" />
              <ArcSegment Size="50,50" RotationAngle="45"
                IsLargeArc="True" SweepDirection="Clockwise"
                Point="200,100"/>
            </PathFigure.Segments>
          </PathFigure>
        </PathGeometry.Figures>
      </PathGeometry>
    </Path.Data>
  </Path>
</Canvas>

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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