def
ShowAsDropDown(buttonRect as Rect,
windowSize as Vector2)
as void
Parameters
buttonRect
Is used for positioning the window.
windowSize
Is used for setting up initial size of the window.
Description
Show window with dropdown behaviour (e.g. window is closed when it loses focus) and having.
Appearance as 'ShowMode.PopupMenu' (no frame).
Note this function auto fits the window to screen while trying to place it first below then above.
So windowSize might change when fitting it to screen therefore make sure to get 'position' afterwards
to check size was cropped.