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

[Bastian M. <bma...@we...>]

Am 23.02.2014 04:46, schrieb Daniel J Sebald:
> 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.

Hhhm. I am currently unaware of a Windows API to change a process to the 
"detached" state. If there is indeed such a thing, this could also help 
to finally implement -persist properly on Windows for all interactive 
terminals.

   Bastian


>
> 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
>>
>>
>