| bubbles | Whether this event type bubbles up in the event propagation path. |
| currentTarget | The current target of the event. This is the VisualElement, in the propagation path, for which event handlers are currently being executed. |
| dispatch | 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 | Retrieves the type ID for this event instance. |
| imguiEvent | The IMGUIEvent at the source of this event. The source can be null since not all events are generated by IMGUI. |
| isDefaultPrevented | Return true if the default actions should not be executed for this event. |
| isImmediatePropagationStopped | Whether StopImmediatePropagation() was called for this event. |
| isPropagationStopped | Whether StopPropagation() was called for this event. |
| originalMousePosition | The original mouse position of the IMGUI event, before it is transformed to the current target local coordinates. |
| pooled | Whether the event is allocated from a pool of events. |
| propagationPhase | The current propagation phase. |
| target | 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 | The time when the event was created. |
| tricklesDown | Whether this event is sent down the event propagation path during the TrickleDown phase. |
| eventTypeId | Retrieves the type ID for this event instance. |
| actionKey | Returns true if the platform-specific action key is pressed. This key is Cmd on macOS, and Ctrl on all other platforms. |
| altKey | Returns true if the Alt key is pressed. |
| button | Integer that indicates which mouse button is pressed: 0 is the left button, 1 is the right button, 2 is the middle button. |
| clickCount | The number of times the button is pressed. |
| commandKey | Returns true if the Windows/Cmd key is pressed. |
| ctrlKey | Returns true if the Ctrl key is pressed. |
| currentTarget | The current target of the event. The current target is the element in the propagation path for which event handlers are currently being executed. |
| localMousePosition | The mouse position in the current target coordinate system. |
| modifiers | Flags that hold pressed modifier keys (Alt, Ctrl, Shift, Windows/Cmd). |
| mouseDelta | The difference of the mouse position between the previous mouse event and the current mouse event. |
| mousePosition | The mouse position in the screen coordinate system. |
| pressedButtons | A bitmask that describes the currently pressed buttons. |
| shiftKey | Returns true if the Shift key is pressed. |