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POI just cannot get QTcpServer working (newConnection never called)
 

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  1. POI just cannot get QTcpServer working (newConnection never called)
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    <p>I know similar question to this have been asked, but I haven't found an answer that fixes my problem.</p> <p>I'm adapting some existing Qt code to add server functionality to a program my company uses. To that end I added a QTcpServer object to the existing dialog, call listen() and connect a slot to the newConnection emitter, like:</p> <pre><code> .h class QConsole : public QDialog { Q_OBJECT public: void init(); public slots: void new_Connection(); private: QTcpServer m_Server; } .cpp void QConsole::init() { m_Server.listen(QHostAddress::Any, 12346); QDialog::connect(&amp;m_Server, SIGNAL(newConnection()), this, SLOT(new_Connection())); } </code></pre> <p>Main is:</p> <pre><code> int main( int argc, char *argv[] ) { QApplication app(argc, argv); QConsole * _output_window = new QConsole(desktopRect); _output_window-&gt;init(); _output_window-&gt;show(); return app.exec(); } </code></pre> <p>new_Connection() never gets called so I can't see the relevance, but here it is: </p> <pre><code> void QConsole::new_Connection() { } </code></pre> <p>This works fine in that my program starts listening on the port specified and if I telnet to it a connection of sorts it made, but new_Connection() is never ever ever called!</p> <p>I've seen posts on this problem dating back to 2005 so it's obviously not a new thing, but what I haven't found is a satisfactory answer to the problem (or any answer actually). This has got everyone at work stumped, even the person that has written a Qt server program. I'm guessing that there is something fundamentally wrong with the existing framework, but I have no idea what it might be. </p> <p>I have been tearing my hair out for a day and a half over this, and the closes I got to success was using waitForNewConnection() which would actually return me a socket, but when I connected to the readReady() emitter, that was never fired either. So what would prevent these signals never getting called? </p> <p>Please spare my sanity and help me as much as you can.</p>
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    1. COThat code works just fine here. Please post the new_Connection code, and show how you're calling that `init` method. Adding a minimal `main` to get your code to work minimally would be nice.
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    2. COmain code added. There has to be something in my project setup that is preventing the signals being called, but I can't figure it out for the life of me!
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    3. COhow are you determining that the slot is not called?
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