Hi, Robert! Several years ago I tried to make a utility for visualizing calls of user-defined functions ( classmethods ). Perhaps this will help in the implementation of your own idea.

not only properties. Also:

d ..AnotherMethod() // of THIS class

w ..#Parameter // of THIS class

and even 

d ..AnotherClassMethod()  //of course in ClassMethod or Method of THIS class

double dot - shortcut to THIS class context

Oops, I missed the phrase about user input
As far as I know, commands for reading input do not work in the output window