# Context

> Provides access to visualization data and features for a graph.

## Definition

* **Type:** Class
* **Namespace:** [Unity.GraphToolkit.Editor.GraphVisualization](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization.md)
* **Assembly:** UnityEditor
* **Implements:** [IDisposable](https://learn.microsoft.com/dotnet/api/system.idisposable)

```csharp
public sealed class Context : IDisposable
```

## Remarks

Create a [Context](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context.md) through [Registry.CreateVisualizationContext](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/registry/createvisualizationcontext.md). The context remains valid until you call [Context.Dispose](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/dispose.md). While the context is alive, you can apply visualization changes to graph elements (retrieved as references) in the associated graph. Each context has a unique [Context.VisualizationContextID](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/visualizationcontextid.md) assigned at creation, which lets you distinguish ownership when multiple consumers operate on the same graph. Disposing the context unregisters it from the [Registry](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/registry.md) and clears any visualization data added through it.

Additional Resources: [Registry](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/registry.md), [GraphMotion](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/graphmotion.md)

Create a visualization context for a graph, retrieve a port reference from it, and set a port preview value. The using statement ensures the context is disposed when no longer needed.

## Examples

```csharp
using Context context = Registry.CreateVisualizationContext(graphID);
PortReference port = context.GetPortReference(portUID);
port.SetPreview("42.0");
```

## Properties

| Property                                                                                                                                                 | Description                                                                                                                                                                                                   |
| -------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [ConditionCustomizationEnabled](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/conditioncustomizationenabled.md)   | Whether the condition customization feature is enabled for this visualization context. Enabled by default.                                                                                                    |
| [IsGraphLoaded](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/isgraphloaded.md)                                   | Indicates whether the graph identified by the associated [Graph.ID](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graph/id.md) is currently loaded.                                               |
| [IsValid](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/isvalid.md)                                               | Indicates whether this context can still be used. The value becomes false after [Context.Dispose](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/dispose.md) is called. |
| [Motion](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/motion.md)                                                 | The animation system used to drive animations on graph elements in this visualization context.                                                                                                                |
| [NodeCustomizationEnabled](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/nodecustomizationenabled.md)             | Whether the node customization feature is enabled for this visualization context. Enabled by default.                                                                                                         |
| [PortPreviewEnabled](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/portpreviewenabled.md)                         | Whether the port preview feature is enabled for this visualization context. Enabled by default.                                                                                                               |
| [StateCustomizationEnabled](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/statecustomizationenabled.md)           | Whether the state customization feature is enabled for this visualization context. Enabled by default.                                                                                                        |
| [TransitionCustomizationEnabled](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/transitioncustomizationenabled.md) | Whether the transition customization feature is enabled for this visualization context. Enabled by default.                                                                                                   |
| [VisualizationContextID](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/visualizationcontextid.md)                 | The unique identifier for this context.                                                                                                                                                                       |
| [WireCustomizationEnabled](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/wirecustomizationenabled.md)             | Whether the wire customization feature is enabled for this visualization context. Enabled by default.                                                                                                         |

## Methods

| Method                                                                                                                                   | Description                                                                                                                                                                                                              |
| ---------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| [ClearAllVisualization](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/clearallvisualization.md)   | Clears all visualization data associated with this context.                                                                                                                                                              |
| [Dispose](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/dispose.md)                               | Releases this context and clears all associated visualization data.                                                                                                                                                      |
| [GetConditionReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/getconditionreference.md)   | Returns a [ConditionReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/conditionreference.md) that identifies the condition with the given ID within this visualization context.    |
| [GetNodeReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/getnodereference.md)             | Returns a [NodeReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/nodereference.md) that identifies the node with the given ID within this visualization context.                   |
| [GetPortReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/getportreference.md)             | Retrieves a reference to a port in the graph associated with this context, using the port's unique identifier.                                                                                                           |
| [GetStateReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/getstatereference.md)           | Returns a [StateReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/statereference.md) that identifies the state with the given ID within this visualization context.                |
| [GetTransitionReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/gettransitionreference.md) | Returns a [TransitionReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/transitionreference.md) that identifies the transition with the given ID within this visualization context. |
| [GetWireReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/context/getwirereference.md)             | Returns a [WireReference](/engine/6000.7/script-reference/unity/graphtoolkit/editor/graphvisualization/wirereference.md) that identifies the node with the given ID within this visualization context.                   |