How to draw relay logic in qt??

[NIXIN]

Suppose I have an equation:
A + B * C = D
I want develop a relay logic for this equation. How should I approach? Which libraries in Qt will help to make this successful?

[mrjj]

Hi
What is "relay logic" ?
You want to draw it or what is the goal? :)

Can you provide more details of the project. ?

[koronabora]

@NIXIN said:

relay logic

Make A, B, C and D in gui like QLineEdit. After that catch every signal like QLineEdit::textChanged(const QString &text) and recalc all other values in other places.