GeometryGroup Class

Represents a composite geometry, composed of other Geometry objects.

Inheritance Hierarchy

System.Object
  System.Windows.DependencyObject
    System.Windows.Media.Geometry
      System.Windows.Media.GeometryGroup

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

Syntax

'Declaration
<ContentPropertyAttribute("Children", True)> _
Public NotInheritable Class GeometryGroup _
    Inherits Geometry
[ContentPropertyAttribute("Children", true)]
public sealed class GeometryGroup : Geometry
<GeometryGroup>
  oneOrMoreGeometries
</GeometryGroup>

XAML Values

The GeometryGroup type exposes the following members.

Constructors

  Name Description
Public methodSupported by Silverlight for Windows Phone GeometryGroup Initializes a new instance of the GeometryGroup class.

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Properties

  Name Description
Public propertySupported by Silverlight for Windows Phone Bounds Gets a Rect that specifies the axis-aligned bounding box of the Geometry. (Inherited from Geometry.)
Public propertySupported by Silverlight for Windows Phone Children Gets or sets the GeometryCollection that contains the objects that define this GeometryGroup.
Public propertySupported by Silverlight for Windows Phone Dispatcher Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertySupported by Silverlight for Windows Phone FillRule Gets or sets how the intersecting areas of the objects contained in this GeometryGroup are combined.
Public propertySupported by Silverlight for Windows Phone Transform Gets or sets the Transform object applied to a Geometry. (Inherited from Geometry.)

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Methods

  Name Description
Public methodSupported by Silverlight for Windows Phone CheckAccess Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone ClearValue Clears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone 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.)
Public methodSupported by Silverlight for Windows Phone 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.)
Public methodSupported by Silverlight for Windows Phone GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetType Gets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetValue Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodSupported by Silverlight for Windows Phone MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone ReadLocalValue Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone SetValue Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows Phone ToString Returns a string that represents the current object. (Inherited from Object.)

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Fields

  Name Description
Public fieldStatic memberSupported by Silverlight for Windows Phone ChildrenProperty Identifies the Children dependency property.
Public fieldStatic memberSupported by Silverlight for Windows Phone FillRuleProperty Identifies the FillRule dependency property.

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Remarks

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.

Examples

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.

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.