How can I make the handler be called when the data changes?

Question

Qt

There is a tabbar. Each tab is a separate calculation. Each tab has its own fields for entering values. Please tell me how to make it more compact and more correct, so that with any change in the values ​​​​of the input fields, the calculation function is called. Is it necessary to write such processing for everyone? Or is there an easier solution.

Answer 1

QObject::connect
QLineEdit::textChanged