They are breaking Curly’s Law here (https://blog.codinghorror.com/curlys-law-do-one-thing/ https://blog.codinghorror.com/curlys-law-do-one-thing/), the screenX/

They are breaking Curly’s Law here (https://blog.codinghorror.com/curlys-law-do-one-thing/ https://blog.codinghorror.com/curlys-law-do-one-thing/), the screenX/Y location mean one thing: the location of the mouse event on screen. Using it for anything else is a huge red flag.