Solved Getting QProcess to send Signals...
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I have created a QWizardPage class, which has the following code in its constructor:
Process = new QProcess(this); connect(Process, SIGNAL(stateChanged(QProcess::ProcessState)), this, SLOT(onRunning(QProcess::ProcessState))); connect(Process, SIGNAL(readyReadStandardOutput()), this, SLOT(onOutput())); connect(Process, SIGNAL(readyReadStandardError()), this, SLOT(onError()));
I have overriden the QWizardPage::initializePage() function and the code of my version of this function includes the following line:
Process->startDetached(Command);
where Command is QString that represents what should be executed. I see that this execution does take place and it does produce some text on stdout. However, none of the signals QProcess::stateChanged(QProcess::ProcessState), QProcess::readyReadStandardOutput() and QProcess::readyReadStandardError() get triggered as the slots in my QWizardPage to which these signals are connected do not get executed when the Command is executed. Is there anything that I should do to activate the signalling or so?
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Hi,
startDetached is a static method thus it doesn't use the Process object at all. Use start if you want to get something from your process.
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Great! That solved it. Wasn't aware that startDetached is static...
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Well, the method documentation as well as QProcess's list of static methods are pretty clear.
However, with Qt 5.10, there will be a new version of that method.