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Philipp
Philipp

Reputation: 987

QTcpServer - how to multi-thread - example is bad

I'm trying to make QTcpServer start a separate thread for each connection. There's example code available that does just that: http://doc.qt.io/qt-5/qtnetwork-threadedfortuneserver-example.html

This code works by subclassing QThread. If I build my code based on that example, I'm pretty soon running into "QObject: Cannot create children for a parent that is in a different thread." warnings.

There is documentation from Qt that advises against subclassing QThread, because that is "doing it wrong": http://blog.qt.io/blog/2010/06/17/youre-doing-it-wrong/

So, my question is, if the Qt provided example code is directly in violation of the Qt recommended practice, is there an example of the correct way to do it? Any example I've found so far subclasses QThread.

Upvotes: 0

Views: 785

Answers (1)

Matt
Matt

Reputation: 15186

Qt is a developing product. And, I seem, subclassing QThread is still considered as legal practice. It is just an older technique, so old examples use it.

Your problem seems to be the wrong usage of QObject(s) across different threads, rather than QThread subclassing. First try to find the code which issues the warnings.

Upvotes: 0

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