enter(event) {
		this.hover = true;
		this.isDirty = true;
		if (this.isDraggable === true) {
			eventEmitter.addListener(POINTERMOVE, this.#boundPointerMoveHandler);
			// to memorize where we grab the object
			this.grabOffset = vector2dPool.get(0, 0);
		}
		return this.onOver(event);
	}
function callback for the pointerEnter event
@ignore