Re: Reworked qt terminal is much faster – and fails to work on Mac

[Daniel J S. <dan...@ie...>]

On 02/22/2014 11:45 AM, Jérôme Lodewyck wrote:
> I think it is fine to create the process as non-detached. We should just make
> sure a new process is started (and without leaking memory) if the previous one
> is killed.

Oh yeah; gnuplot_qt could stop somehow.  I'll watch for that.


>  Also, for the -persist option to work, the process should not be
> deleted at exit.

OK, good.  I'll try to figure out how to change a QProcess to persistent.

Thanks,

Dan


>
> Jérôme
>
> Le samedi 22 février 2014 10:55:39 Daniel J Sebald a écrit :
>> It's fairly simple, really.  But first, I'd like to ask if it is alright
>> to create the process not as detached, but just a normal process.  Is
>> that OK?  If that is done, then after starting the QProcess that will
>> create the local server, just wait for the process to write back the
>> server's name and continue onward.  By writing the local server name to
>> standard output (fprint/fflush) when everything is set up and ready to
>> go, the first time that qt_term attempts to connect to the local server
>> will be a success.
>>
>>
>> IN QT_TERM.CPP:
>>
>>       if (!qtgnuplotProcess)
>>           qtgnuplotProcess = new QProcess();
>>       qtgnuplotProcess->start(filename, QStringList());
>>       if (qtgnuplotProcess->waitForStarted())
>>       {
>>           qtgnuplotProcess->waitForReadyRead();
>>           localServerName = qtgnuplotProcess->readAllStandardOutput();
>>           qDebug()<<  localServerName;
>>       }
>>       else
>>       {
>>           qDebug()<<  "QProcess starting failed:"<<
>> qtgnuplotProcess->errorString();
>>       }
>>
>>
>> IN QTGNUPLOTAPPLICATION.CPP:
>>
>> QtGnuplotApplication::QtGnuplotApplication(int&  argc, char** argv)
>>
>> 	: QApplication(argc, argv)
>>
>> {
>> ...
>>       connect(m_eventHandler, SIGNAL(disconnected()), this,
>> SLOT(enterPersistMode()));
>>
>>       fprintf(stdout, sName.toLocal8Bit().data());
>>       fflush(stdout);
>> }
>>
>> Dan
>
>

-- 

Dan Sebald
email: daniel(DOT)sebald(AT)ieee(DOT)org
URL: http://www(DOT)dansebald(DOT)com