public virtual void DeFocus()
{
InputController.MouseManager.ScrolledUp -= OnScrollUp;
InputController.MouseManager.ScrolledDown -= OnScrollDown;
InputController.MouseManager.LeftButtonDown -= OnLeftClick;
InputController.MouseManager.MouseMoved -= OnMouseMove;
_dropDownButton.DeFocus();
if (_scroller != null)
{
_scroller.DeFocus();
}
}