Geometry Geometry Geometry Class

Definition

Provides a base class for objects that define geometric shapes. Geometry objects can be used for clipping regions and as geometry definitions for rendering two-dimensional graphical data as a Path.

public : class Geometry : DependencyObject, IGeometry
public class Geometry : DependencyObject, IGeometry
Public Class Geometry Inherits DependencyObject Implements IGeometry
Inheritance
Attributes
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)

Remarks

For properties that take a Geometry, you need to specify a nonabstract derived type of Geometry, as an object element for XAML, or as a defined instance for code. For details, see reference pages for EllipseGeometry, GeometryGroup, LineGeometry, PathGeometry, or RectangleGeometry.

Geometries can be conceptualized as being "simple" or "complex". EllipseGeometry, LineGeometry, and RectangleGeometry are the simple geometries, which specify the geometrical shape as one element with basic coordinate or dimension properties. GeometryGroup and PathGeometry are the complex geometries. GeometryGroup combines other geometries that it holds as child objects. PathGeometry uses either a set of nested figure/segment path definition elements, or a compact string syntax that's usually output by designers, to describe a complex path for the geometry.

A Geometry does not entirely define its own rendering, in that it's not a UIElement itself and needs to be provided as some property value for a UIElement in order to cause a rendering effect. Typically, a Geometry is provided as data for a Path (which is a kind of Shape ).

The PathIcon.Data property takes a Geometry. In practice, you'd typically specify a PathGeometry for this, with its Figures property value expressed in the compact string syntax for a path.

GeometryCollection is a strongly typed collection for Geometry items. The GeometryGroup.Children property uses a GeometryCollection.

Geometry versus Shape

The Shape class has a Fill, Stroke, and other rendering properties that Geometry and its derived classes lack. The Shape class is a FrameworkElement and therefore participates in the layout system; its derived classes can be used as the content of any element that supports UIElement children. The Geometry class, on the other hand, simply defines the geometry as a graphics primitive, and cannot render itself. You could conceivably use Geometry as a property type for custom UI element properties where the basic graphics primitive expressions enabled by Geometry are useful as a definition.

Geometry for UIElement.Clip

To provide a value for the UIElement.Clip property in the Windows Runtime, you must specifically use a RectangleGeometry, not any Geometry derived type. If you're porting XAML or code from other XAML frameworks, see if you can change your UIElement.Clip to use RectangleGeometry. Otherwise, you might need to change the Z-order relationship and use techniques such as an overlay of an ImageBrush with a modified RenderTargetBitmap source that has alpha transparency for the "clipping" parts.

Geometry derived classes

Geometry is the parent class for several derived classes that define different categories of practical geometries:

Properties

Bounds Bounds Bounds

Gets a Rect that specifies the axis-aligned bounding box of the Geometry.

public : Rect Bounds { get; }
public Rect Bounds { get; }
Public ReadOnly Property Bounds As Rect
Value
Rect Rect Rect

The axis-aligned bounding box of the Geometry.

See Also

Dispatcher Dispatcher Dispatcher

Inherited from DependencyObject

Empty Empty Empty

Gets an empty geometry object.

public : static Geometry Empty { get; }
public static Geometry Empty { get; }
Public Static ReadOnly Property Empty As Geometry
Value
Geometry Geometry Geometry

The empty geometry object.

StandardFlatteningTolerance StandardFlatteningTolerance StandardFlatteningTolerance

Gets the standard tolerance used for polygonal approximation.

public : static double StandardFlatteningTolerance { get; }
public static double StandardFlatteningTolerance { get; }
Public Static ReadOnly Property StandardFlatteningTolerance As double
Value
double double double

The standard tolerance. The default value is 0.25.

Transform Transform Transform

Gets or sets the Transform object applied to a Geometry.

public : Transform Transform { get; set; }
public Transform Transform { get; set; }
Public ReadWrite Property Transform As Transform
<geometry>
  <geometry.Transform>
    singleTransform
  </geometry.Transform
</geometry>
Value
Transform Transform Transform

The transformation applied to the Geometry. Note that this value may be a single Transform or a list of Transform items.

TransformProperty TransformProperty TransformProperty

Identifies the Transform dependency property.

public : static DependencyProperty TransformProperty { get; }
public static DependencyProperty TransformProperty { get; }
Public Static ReadOnly Property TransformProperty As DependencyProperty
Value
DependencyProperty DependencyProperty DependencyProperty

The identifier for the Transform dependency property.

Methods

ClearValue(DependencyProperty) ClearValue(DependencyProperty) ClearValue(DependencyProperty)

Inherited from DependencyObject

GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty)

Inherited from DependencyObject

GetValue(DependencyProperty) GetValue(DependencyProperty) GetValue(DependencyProperty)

Inherited from DependencyObject

ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty)

Inherited from DependencyObject

RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback)

Inherited from DependencyObject

SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object)

Inherited from DependencyObject

UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64)

Inherited from DependencyObject

See Also