ArcSegment Class
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Represents an elliptical arc between two points.
Inheritance Hierarchy
System.Object
System.Windows.DependencyObject
System.Windows.Media.PathSegment
System.Windows.Media.ArcSegment
Namespace: System.Windows.Media
Assembly: System.Windows (in System.Windows.dll)
Syntax
'Declaration
Public NotInheritable Class ArcSegment _
Inherits PathSegment
public sealed class ArcSegment : PathSegment
<ArcSegment .../>
The ArcSegment type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
.gif "Public property") .gif "Supported by Silverlight for Windows Phone") |
Dispatcher | Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.) |
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IsLargeArc | Gets or sets a value that indicates whether the arc should be greater than 180 degrees. |
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Point | Gets or sets the endpoint of the elliptical arc. |
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RotationAngle | Gets or sets the amount (in degrees) by which the ellipse is rotated about the x-axis. |
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Size | Gets or sets the x- and y-radius of the arc as a Size structure. |
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SweepDirection | Gets or sets a value that specifies whether the arc is drawn in the Clockwise or Counterclockwise direction. |
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Methods
| Name | Description | |
|---|---|---|
.gif "Public method") |
CheckAccess | Determines whether the calling thread has access to this object. (Inherited from DependencyObject.) |
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ClearValue | Clears the local value of a dependency property. (Inherited from DependencyObject.) |
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Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
.gif "Protected method") |
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.) |
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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.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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GetValue | Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.) |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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ReadLocalValue | Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.) |
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SetValue | Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.) |
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ToString | Returns a string that represents the current object. (Inherited from Object.) |
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Fields
| Name | Description | |
|---|---|---|
.gif "Public field") .gif "Static member") |
IsLargeArcProperty | Identifies the IsLargeArc dependency property. |
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PointProperty | Identifies the Point dependency property. |
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RotationAngleProperty | Identifies the RotationAngle dependency property. |
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SizeProperty | Identifies the Size dependency property. |
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SweepDirectionProperty | Identifies the SweepDirection dependency property. |
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Remarks
Use a PathFigure object to store ArcSegment objects and other segments.
An elliptical arc is defined by its start and end points, x- and y-radius, x-axis rotation factor, a value indicating whether the arc should be greater than 180 degrees, and a value describing the direction in which the arc is drawn. The ArcSegment class does not contain a property for the starting point of the arc; it only defines 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.
The following illustrations demonstrate the different end point, Size, and RotationAngle settings.
.png "ArcSegments with different Point settings")
.png "ArcSegments with different Size settings")
.png "ArcSegments with different RotationAngle settings")
IsLargeArc and SweepDirection
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 IsLargeArc 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 illustrations show different IsLargeArc and SweepDirection settings.
ArcSegment objects with different IsLargeArc settings
.png "ArcSegments with different IsLargeArc settings")
ArcSegment objects with different SweepDirection settings
.png "ArcSegments with different SweepDirection settings")
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.