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GeometryGroup Class

Represents a composite geometry, composed of other Geometry objects.

Namespace:  System.Windows.Media
Assembly:  System.Windows (in System.Windows.dll)
'Declaration
<ContentPropertyAttribute("Children", True)> _
Public NotInheritable Class GeometryGroup _
	Inherits Geometry
<GeometryGroup>
  oneOrMoreGeometries
</GeometryGroup>

XAML Values

oneOrMoreGeometries

One or more object elements that derive from Geometry. Typically, these are any combination of the Silverlight defined classes EllipseGeometry, GeometryGroup, LineGeometry, PathGeometry, and RectangleGeometry. Object elements defined here become members of the Children collection when code accesses the Children property at run time.

The GeometryGroup type exposes the following members.

  NameDescription
Public methodSupported by Silverlight for Windows PhoneGeometryGroupInitializes a new instance of the GeometryGroup class.
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  NameDescription
Public propertySupported by Silverlight for Windows PhoneBoundsGets a Rect that specifies the axis-aligned bounding box of the Geometry. (Inherited from Geometry.)
Public propertySupported by Silverlight for Windows PhoneChildrenGets or sets the GeometryCollection that contains the objects that define this GeometryGroup.
Public propertySupported by Silverlight for Windows PhoneDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertySupported by Silverlight for Windows PhoneFillRuleGets or sets how the intersecting areas of the objects contained in this GeometryGroup are combined.
Public propertySupported by Silverlight for Windows PhoneTransformGets or sets the Transform object applied to a Geometry. (Inherited from Geometry.)
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  NameDescription
Public methodSupported by Silverlight for Windows PhoneCheckAccessDetermines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneClearValueClears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetAnimationBaseValueReturns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetValueReturns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodSupported by Silverlight for Windows PhoneMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneReadLocalValueReturns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneSetValueSets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberSupported by Silverlight for Windows PhoneChildrenPropertyIdentifies the Children dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhoneFillRulePropertyIdentifies the FillRule dependency property.
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FillRule is relevant for a GeometryGroup because the combined geometry can potentially have segment combinations where the application of a fill rule will have an effect.

In XAML usages, GeometryGroup uses Children as its content property and supports implicit collection usage. Therefore, to declare transforms that will be in a GeometryGroup in XAML, you declare one or more geometries as object elements, placing them in order as the child elements of the GeometryGroup. Nesting GeometryGroup objects is permitted.

Composite geometry objects can be created using a GeometryGroup. The GeometryGroup object creates an amalgamation of the Geometry objects it contains without combining their area. Any number of Geometry objects can be added to a GeometryGroup. The following example uses a GeometryGroup to create a composite geometry.


<Canvas>
  <Path Stroke="Black" StrokeThickness="1" Fill="#CCCCFF">
    <Path.Data>

      <!-- Creates a composite shape from three geometries. -->
      <GeometryGroup FillRule="EvenOdd">
        <LineGeometry StartPoint="10,10" EndPoint="50,30" />
        <EllipseGeometry Center="40,70" RadiusX="30" RadiusY="30" />
        <RectangleGeometry Rect="30,55 100 30" />
      </GeometryGroup>
    </Path.Data>
  </Path>
</Canvas>


The following illustration shows the output of the example.

A composite Geometry

Shapes.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

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

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

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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