how to handle asynchronous terminal input properly in a console application?
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Hi,
This Github gist might be an interesting starting point.
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Hi,
This Github gist might be an interesting starting point.
@SGaist I have tried your suggestion code but I'm just having trouble with your code on a Windows setup... I can't write in the console
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Hi,
This Github gist might be an interesting starting point.
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@SGaist if i want to our program works like
TOPtool, when user some time push Q , the program will quit. so I should read cmd in main thread and do work in other thread?@SpartaWHY117 You can do it like this, yes.
Or, if you only need to do something on a regular basis, you can use a QTimer. -
@SpartaWHY117 You can do it like this, yes.
Or, if you only need to do something on a regular basis, you can use a QTimer.@jsulm after reading the source code of 'TOP', i found it use infinite loop
(for(;;))andSTDIN_FILENOto monitor stdin and do some response.However, in Qt,
a.exec()is much more common than infinite loop, so the way inTOPseems doesn't suit for me. I have already useQCommandLineParserto handle init cmd, but have problem to end application. So what is the appropriate way to end the application when user pressed q?(my console application works flow like 'TOP', it will periodically display some info to termianl ) -
@jsulm after reading the source code of 'TOP', i found it use infinite loop
(for(;;))andSTDIN_FILENOto monitor stdin and do some response.However, in Qt,
a.exec()is much more common than infinite loop, so the way inTOPseems doesn't suit for me. I have already useQCommandLineParserto handle init cmd, but have problem to end application. So what is the appropriate way to end the application when user pressed q?(my console application works flow like 'TOP', it will periodically display some info to termianl )@SpartaWHY117 said in how to handle arguments from terminal properly in a console application?:
So what is the appropriate way to end the application when user pressed q?
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@SpartaWHY117 said in how to handle arguments from terminal properly in a console application?:
So what is the appropriate way to end the application when user pressed q?
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@jsulm I have learned that doc, maybe my question doesn't describe clear. what i really want to know is that the design pattern to handle anytime keyborad pressed during the Qt main event loop
exec()@SpartaWHY117 Well, you can do it in a thread using the usual blocking stuff like std::cin, or something like this: https://gist.github.com/gjorquera/2576569
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@SpartaWHY117 Well, you can do it in a thread using the usual blocking stuff like std::cin, or something like this: https://gist.github.com/gjorquera/2576569
Actually that sample do not accept any input.
At least not on win 10/Qt 5.8The QSocketNotifier never seems to signal.
Test project.
https://www.dropbox.com/s/azqyjfkg81vteev/console.zip?dl=0 -
@SpartaWHY117 Well, you can do it in a thread using the usual blocking stuff like std::cin, or something like this: https://gist.github.com/gjorquera/2576569
@jsulm on WIN10 , the sample code can't work.Maybe linux works well.
I found a solution on How to handle keypress events in a Qt console application?
. The final answer works well!
