StreamGeometryContext Class
Describes a geometry using drawing commands. This class is used with the StreamGeometry class to create a lightweight geometry that does not support data binding, animation, or modification.
System.Windows.Threading::DispatcherObject
System.Windows.Media::StreamGeometryContext
Assembly: PresentationCore (in PresentationCore.dll)
The StreamGeometryContext type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | Dispatcher | Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.) |
| Name | Description | |
|---|---|---|
![]() | ArcTo | Draws an arc to the specified point. |
![]() | BeginFigure | Specifies the starting point for a new figure. |
![]() | BezierTo | Draws a Bezier curve to the specified point. |
![]() | CheckAccess | Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) |
![]() | Close | Closes this context and flushes its content so that it can be rendered. |
![]() | 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 it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | LineTo | Draws a straight line to the specified Point. |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | PolyBezierTo | Draws one or more connected Bezier curves. |
![]() | PolyLineTo | Draws one or more connected straight lines. |
![]() | PolyQuadraticBezierTo | Draws one or more connected quadratic Bezier curves. |
![]() | QuadraticBezierTo | Draws a quadratic Bezier curve. |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
![]() | VerifyAccess | Enforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) |
| Name | Description | |
|---|---|---|
![]() ![]() | IDisposable::Dispose | This member supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code. |
| Exception | Condition |
|---|---|
| InvalidOperationException | An attempt was made to add a segment without starting a figure by calling the BeginFigure method. |
StreamGeometry is light-weight alternative to PathGeometry for creating geometric shapes. Use a StreamGeometry when you need to describe a complex geometry but do not want the overhead of supporting data binding, animation, or modification. For example, because of its efficiency, the StreamGeometry class is a good choice for describing adorners.
The following example uses attribute syntax to create a triangular StreamGeometry in XAML.
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <StackPanel> <Path Data="F0 M10,100 L100,100 100,50Z" StrokeThickness="1" Stroke="Black"/> </StackPanel> </Page>
For more information about StreamGeometry attribute syntax, see the Path Markup Syntax page.
The next example uses a StreamGeometry to define a triangle in code. First, the example creates a StreamGeometry, then obtains a StreamGeometryContext and uses it to describe the triangle.
The next example creates a method that uses a StreamGeometry and StreamGeometryContext to define a geometric shape based on specified parameters.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
