Как использовать идиому Qt PIMPL? ⇐ C++

[Anonymous]

PIMPL stands for Pointer to IMPLementation. The implementation stands for "implementation detail": something that the users of the class need not to be concerned with.

Qt's own class implementations cleanly separate out the interfaces from the implementations through the use of the PIMPL idiom. Yet, the mechanisms provided by Qt are undocumented. How to use them?

I'd like this to be the canonical question about "how do I PIMPL" in Qt. The answers are to be motivated by a simple coordinate entry dialog interface shown below.

The motivation for the use of PIMPL becomes apparent when we have anything with a semi-complex implementation. Further motivation is given in this question. Even a fairly simple class has to pull in a lot of other headers in its interface.





The PIMPL-based interface is fairly clean and readable.

// CoordinateDialog.h #include #include class CoordinateDialogPrivate; class CoordinateDialog : public QDialog { Q_OBJECT Q_DECLARE_PRIVATE(CoordinateDialog) #if QT_VERSION

Источник: https://stackoverflow.com/questions/252 ... impl-idiom