# EventBase > The base class for all UIElements events. The class implements IDisposable to ensure proper release of the event from the pool and of any unmanaged resources, when necessary. ## Definition * **Type:** Class * **Namespace:** [UnityEngine.UIElements](/engine/6000.3/script-reference/unityengine/uielements.md) * **Assembly:** UnityEngine.UIElementsModule * **Implements:** [IDisposable](https://learn.microsoft.com/dotnet/api/system.idisposable) ```csharp public abstract class EventBase : IDisposable ``` ## Constructors | Constructor | Description | | --------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- | | [EventBase()](/engine/6000.3/script-reference/unityengine/uielements/eventbase/ctor.md) | Constructor. Avoid creating new event instances. Instead, use GetPooled() to get an instance from a pool of reusable event instances. | ## Properties | Property | Description | | ---------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [bubbles](/engine/6000.3/script-reference/unityengine/uielements/eventbase/bubbles.md) | Returns whether this event type bubbles up in the event propagation path during the BubbleUp phase. | | [currentTarget](/engine/6000.3/script-reference/unityengine/uielements/eventbase/currenttarget.md) | The current target of the event. This is the VisualElement, in the propagation path, for which event handlers are currently being executed. | | [dispatch](/engine/6000.3/script-reference/unityengine/uielements/eventbase/dispatch.md) | Indicates whether the event is being dispatched to a visual element. An event cannot be redispatched while it being dispatched. If you need to recursively dispatch an event, it is recommended that you use a copy of the event. | | [eventTypeId](/engine/6000.3/script-reference/unityengine/uielements/eventbase/eventtypeid.md) | Retrieves the type ID for this event instance. | | [ignoreDisabledElements](/engine/6000.3/script-reference/unityengine/uielements/eventbase/ignoredisabledelements.md) | If this property is true, callbacks for this event are not invoked when the current target is disabled, unless those callbacks are registered using the [CallbackOptions.IncludeDisabled](/engine/6000.3/script-reference/unityengine/uielements/callbackoptions/includedisabled.md) option. | | [imguiEvent](/engine/6000.3/script-reference/unityengine/uielements/eventbase/imguievent.md) | The IMGUIEvent at the source of this event. The source can be null since not all events are generated by IMGUI. | | [isImmediatePropagationStopped](/engine/6000.3/script-reference/unityengine/uielements/eventbase/isimmediatepropagationstopped.md) | Indicates whether [EventBase.StopImmediatePropagation()](/engine/6000.3/script-reference/unityengine/uielements/eventbase/stopimmediatepropagation.md) was called for this event. | | [isPropagationStopped](/engine/6000.3/script-reference/unityengine/uielements/eventbase/ispropagationstopped.md) | Returns true if [EventBase.StopPropagation()](/engine/6000.3/script-reference/unityengine/uielements/eventbase/stoppropagation.md) or [EventBase.StopImmediatePropagation()](/engine/6000.3/script-reference/unityengine/uielements/eventbase/stopimmediatepropagation.md) was called for this event. | | [originalMousePosition](/engine/6000.3/script-reference/unityengine/uielements/eventbase/originalmouseposition.md) | The original mouse position of the IMGUI event, before it is transformed to the current target local coordinates. | | [pooled](/engine/6000.3/script-reference/unityengine/uielements/eventbase/pooled.md) | Whether the event is allocated from a pool of events. | | [propagationPhase](/engine/6000.3/script-reference/unityengine/uielements/eventbase/propagationphase.md) | The current propagation phase for this event. | | [target](/engine/6000.3/script-reference/unityengine/uielements/eventbase/target.md) | The target visual element that received this event. Unlike currentTarget, this target does not change when the event is sent to other elements along the propagation path. | | [timestamp](/engine/6000.3/script-reference/unityengine/uielements/eventbase/timestamp.md) | The time when the event was dispatched, in milliseconds. | | [tricklesDown](/engine/6000.3/script-reference/unityengine/uielements/eventbase/tricklesdown.md) | Returns whether this event is sent down the event propagation path during the TrickleDown phase. | ## Methods | Method | Description | | ------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------- | | [Dispose](/engine/6000.3/script-reference/unityengine/uielements/eventbase/dispose.md) | Implementation of IDisposable. | | [Init](/engine/6000.3/script-reference/unityengine/uielements/eventbase/init.md) | Resets all event members to their initial values. | | [PostDispatch](/engine/6000.3/script-reference/unityengine/uielements/eventbase/postdispatch.md) | Allows subclasses to perform custom logic after the event has been dispatched. | | [PreDispatch](/engine/6000.3/script-reference/unityengine/uielements/eventbase/predispatch.md) | Allows subclasses to perform custom logic before the event is dispatched. | | [StopImmediatePropagation](/engine/6000.3/script-reference/unityengine/uielements/eventbase/stopimmediatepropagation.md) | Stops the propagation of the event to other targets, and prevents other subscribers to the event on this target to receive the event. | | [StopPropagation](/engine/6000.3/script-reference/unityengine/uielements/eventbase/stoppropagation.md) | Stops the propagation of the event to other targets. All subscribers to the event on this target still receive the event. | ## Static Methods | Method | Description | | ---------------------------------------------------------------------------------------------------------- | -------------------------------------------------- | | [RegisterEventType](/engine/6000.3/script-reference/unityengine/uielements/eventbase/registereventtype.md) | Registers an event class to the event type system. |