DrawingContext Class
Describes visual content using draw, push, and pop commands.
Assembly: PresentationCore (in PresentationCore.dll)
The DrawingContext type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | Dispatcher | Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.) |
| Name | Description | |
|---|---|---|
![]() | CheckAccess | Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) |
![]() | Close | Closes the DrawingContext and flushes the content. Afterward, the DrawingContext cannot be modified. |
![]() | DisposeCore | Releases all resources used by the DrawingContext. |
![]() | DrawDrawing | Draws the specified Drawing object. |
![]() | DrawEllipse(Brush, Pen, Point, Double, Double) | Draws an ellipse with the specified Brush and Pen. |
![]() | DrawEllipse(Brush, Pen, Point, AnimationClock, Double, AnimationClock, Double, AnimationClock) | Draws an ellipse with the specified Brush and Pen and applies the specified animation clocks. |
![]() | DrawGeometry | Draws the specified Geometry using the specified Brush and Pen. |
![]() | DrawGlyphRun | Draws the specified text. |
![]() | DrawImage(ImageSource, Rect) | Draws an image into the region defined by the specified Rect. |
![]() | DrawImage(ImageSource, Rect, AnimationClock) | Draws an image into the region defined by the specified Rect and applies the specified animation clock. |
![]() | DrawLine(Pen, Point, Point) | Draws a line between the specified points using the specified Pen. |
![]() | DrawLine(Pen, Point, AnimationClock, Point, AnimationClock) | Draws a line between the specified points using the specified Pen and applies the specified animation clocks. |
![]() | DrawRectangle(Brush, Pen, Rect) | Draws a rectangle with the specified Brush and Pen. The pen and the brush can be nullptr. |
![]() | DrawRectangle(Brush, Pen, Rect, AnimationClock) | Draws a rectangle with the specified Brush and Pen and applies the specified animation clocks. |
![]() | DrawRoundedRectangle(Brush, Pen, Rect, Double, Double) | Draws a rounded rectangle with the specified Brush and Pen. |
![]() | DrawRoundedRectangle(Brush, Pen, Rect, AnimationClock, Double, AnimationClock, Double, AnimationClock) | Draws a rounded rectangle with the specified Brush and Pen and applies the specified animation clocks. |
![]() | DrawText | Draws formatted text at the specified location. |
![]() | DrawVideo(MediaPlayer, Rect) | Draws a video into the specified region. |
![]() | DrawVideo(MediaPlayer, Rect, AnimationClock) | Draws a video into the specified region and applies the specified animation clock. |
![]() | 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.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | Pop | Pops the last opacity mask, opacity, clip, effect, or transform operation that was pushed onto the drawing context. |
![]() | PushClip | Pushes the specified clip region onto the drawing context. |
![]() | PushEffect | Obsolete. Pushes the specified BitmapEffect onto the drawing context. |
![]() | PushGuidelineSet | Pushes the specified GuidelineSet onto the drawing context. |
![]() | PushOpacity(Double) | Pushes the specified opacity setting onto the drawing context. |
![]() | PushOpacity(Double, AnimationClock) | Pushes the specified opacity setting onto the drawing context and applies the specified animation clock. |
![]() | PushOpacityMask | Pushes the specified opacity mask onto the drawing context. |
![]() | PushTransform | Pushes the specified Transform onto the drawing context. |
![]() | 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.) |
![]() | VerifyApiNonstructuralChange | This member supports the WPF infrastructure and is not intended to be used directly from your code. |
| Name | Description | |
|---|---|---|
![]() ![]() | IDisposable::Dispose | This member supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code. |
Use a DrawingContext to populate a Visual or a Drawing with visual content.
Although the DrawingContext draw methods appear similar to the draw methods of the System.Drawing::Graphics type, they function very differently: DrawingContext is used with a retained mode graphics system, while the System.Drawing::Graphics type is used with an immediate mode graphics system. When you use a DrawingContext object's draw commands, you are actually storing a set of rendering instructions (although the exact storage mechanism depends on the type of object that supplies the DrawingContext) that will later be used by the graphics system; you are not drawing to the screen in real-time. For more information about how the Windows Presentation Foundation (WPF) graphics system works, see WPF Graphics Rendering Overview.
You never directly instantiate a DrawingContext; you can, however, acquire a drawing context from certain methods, such as DrawingGroup::Open and DrawingVisual::RenderOpen.
The following example retrieves a DrawingContext from a DrawingVisual and uses it to draw a rectangle.
The next example demonstrates the PushOpacity, PushEffect, and Pop commands. The DrawingContext is obtained from a DrawingGroup and displayed using an Image control.
More Code
| How to: Draw Text to a Visual | The following example shows how to draw text to a DrawingVisual using a DrawingContext object. A drawing context is returned by calling the RenderOpen method of a DrawingVisual object. You can draw graphics and text into a drawing context. |
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.
