# TransitionRunEvent

> Event sent when a transition is created (i.e. added to the set of running transitions).

## Definition

* **Type:** Class
* **Namespace:** [UnityEngine.UIElements](/engine/6000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule
* **Inherits from:** [TransitionEventBase\<TransitionRunEvent>](/engine/6000.0/script-reference/unityengine/uielements/transitioneventbase1.md)
* **Implements:** [IDisposable](https://learn.microsoft.com/dotnet/api/system.idisposable), [ITransitionEvent](/engine/6000.0/script-reference/unityengine/uielements/itransitionevent.md)

```csharp
public sealed class TransitionRunEvent : TransitionEventBase<TransitionRunEvent>, IDisposable, ITransitionEvent
```

## Inheritance

**Inherited Members:**

* [TransitionEventBase\<TransitionRunEvent>.GetPooled(StylePropertyName, double)](/engine/6000.0/script-reference/unityengine/uielements/transitioneventbase1/getpooled.md)
* [TransitionEventBase\<TransitionRunEvent>.AffectsProperty(StylePropertyName)](/engine/6000.0/script-reference/unityengine/uielements/transitioneventbase1/affectsproperty.md)
* [TransitionEventBase\<TransitionRunEvent>.stylePropertyNames](/engine/6000.0/script-reference/unityengine/uielements/transitioneventbase1/stylepropertynames.md)
* [TransitionEventBase\<TransitionRunEvent>.elapsedTime](/engine/6000.0/script-reference/unityengine/uielements/transitioneventbase1/elapsedtime.md)
* [EventBase\<TransitionRunEvent>.TypeId()](/engine/6000.0/script-reference/unityengine/uielements/eventbase1/typeid.md)
* [EventBase\<TransitionRunEvent>.GetPooled()](/engine/6000.0/script-reference/unityengine/uielements/eventbase1/getpooled.md)
* [EventBase\<TransitionRunEvent>.Dispose()](/engine/6000.0/script-reference/unityengine/uielements/eventbase1/dispose.md)
* [EventBase\<TransitionRunEvent>.eventTypeId](/engine/6000.0/script-reference/unityengine/uielements/eventbase1/eventtypeid.md)
* [EventBase.StopPropagation()](/engine/6000.0/script-reference/unityengine/uielements/eventbase/stoppropagation.md)
* [EventBase.StopImmediatePropagation()](/engine/6000.0/script-reference/unityengine/uielements/eventbase/stopimmediatepropagation.md)
* [EventBase.timestamp](/engine/6000.0/script-reference/unityengine/uielements/eventbase/timestamp.md)
* [EventBase.bubbles](/engine/6000.0/script-reference/unityengine/uielements/eventbase/bubbles.md)
* [EventBase.tricklesDown](/engine/6000.0/script-reference/unityengine/uielements/eventbase/tricklesdown.md)
* [EventBase.target](/engine/6000.0/script-reference/unityengine/uielements/eventbase/target.md)
* [EventBase.isPropagationStopped](/engine/6000.0/script-reference/unityengine/uielements/eventbase/ispropagationstopped.md)
* [EventBase.isImmediatePropagationStopped](/engine/6000.0/script-reference/unityengine/uielements/eventbase/isimmediatepropagationstopped.md)
* [EventBase.propagationPhase](/engine/6000.0/script-reference/unityengine/uielements/eventbase/propagationphase.md)
* [EventBase.currentTarget](/engine/6000.0/script-reference/unityengine/uielements/eventbase/currenttarget.md)
* [EventBase.dispatch](/engine/6000.0/script-reference/unityengine/uielements/eventbase/dispatch.md)
* [EventBase.imguiEvent](/engine/6000.0/script-reference/unityengine/uielements/eventbase/imguievent.md)
* [EventBase.originalMousePosition](/engine/6000.0/script-reference/unityengine/uielements/eventbase/originalmouseposition.md)