Version: 2021.1
LanguageEnglish
  • C#

WheelEvent

class in UnityEngine.UIElements

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Inherits from:UIElements.MouseEventBase_1

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Implemented in:UnityEngine.UIElementsModule

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Description

Mouse wheel event.

Properties

deltaThe amount of scrolling applied with the mouse wheel.

Constructors

WheelEventConstructor. Use GetPooled() to get an event from a pool of reusable events.

Protected Methods

InitResets the event members to their initial values.

Static Methods

GetPooledGets an event from the event pool and initializes it with the given values. Use this function instead of creating new events. Events obtained using this method need to be released back to the pool. You can use `Dispose()` to release them.

Inherited Members

Properties

bubblesWhether this event type bubbles up in the event propagation path.
currentTargetThe current target of the event. This is the VisualElement, in the propagation path, for which event handlers are currently being executed.
dispatchWhether 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.
eventTypeIdRetrieves the type ID for this event instance.
imguiEventThe IMGUIEvent at the source of this event. The source can be null since not all events are generated by IMGUI.
isDefaultPreventedReturn true if the default actions should not be executed for this event.
isImmediatePropagationStoppedWhether StopImmediatePropagation() was called for this event.
isPropagationStoppedWhether StopPropagation() was called for this event.
originalMousePositionThe original mouse position of the IMGUI event, before it is transformed to the current target local coordinates.
pooledWhether the event is allocated from a pool of events.
propagationPhaseThe current propagation phase.
targetThe 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.
timestampThe time when the event was created.
tricklesDownWhether this event is sent down the event propagation path during the TrickleDown phase.
eventTypeIdRetrieves the type ID for this event instance.
actionKeyReturns true if the platform-specific action key is pressed. This key is Cmd on macOS, and Ctrl on all other platforms.
altKeyReturns true if the Alt key is pressed.
buttonInteger that indicates which mouse button is pressed: 0 is the left button, 1 is the right button, 2 is the middle button.
clickCountThe number of times the button is pressed.
commandKeyReturns true if the Windows/Cmd key is pressed.
ctrlKeyReturns true if the Ctrl key is pressed.
currentTargetThe current target of the event. The current target is the element in the propagation path for which event handlers are currently being executed.
localMousePositionThe mouse position in the current target coordinate system.
modifiersFlags that hold pressed modifier keys (Alt, Ctrl, Shift, Windows/Cmd).
mouseDeltaThe difference of the mouse position between the previous mouse event and the current mouse event.
mousePositionThe mouse position in the screen coordinate system.
pressedButtonsA bitmask that describes the currently pressed buttons.
shiftKeyReturns true if the Shift key is pressed.

Public Methods

DisposeImplementation of IDisposable.
PreventDefaultWhether the default actions are prevented from being executed for this event.
StopImmediatePropagationImmediately stops the propagation of the event. The event is not sent to other elements along the propagation path. This method prevents other event handlers from executing on the current target.
StopPropagationStops propagating this event. The event is not sent to other elements along the propagation path. This method does not prevent other event handlers from executing on the current target.
DisposeImplementation of IDispose.

Static Methods

RegisterEventTypeRegisters an event class to the event type system.
GetPooledGets an event from the event pool. Use this function instead of creating new events. Events obtained using this method need to be released back to the pool. You can use `Dispose()` to release them.
TypeIdGets the type ID for the event class.