QTextEdit from cout stream not displayed at once

Dear all,
I search in the web and I found out that a way to redirect std::cout to a QTextEditor is to implement a class

Code:

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class QDebugStream : public std::basic_streambuf<char>

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The implementation of the class is in the attached file.
I made the call of the class in this way (Ui_outputView I designed myself through qtDesigner, it is just a Widget containing a QTextEditor "consoleTextEdit")

Code:

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class OutputView : public QWidget, private Ui_outputView
{
    Q_OBJECT
 
public:
    OutputView(QWidget* parent = NULL){    
	setupUi(this);
	consoleTextEdit->toPlainText();
        qout = new QDebugStream(std::cout, consoleTextEdit);
}
    ~OutputView(){}
 
private:
	QDebugStream *qout;
 
};

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The code works fine, I can display the output text but I have two main questions:
1- I would like that the text is displayed not all at once: so far the text is displayed when the function that contains all the prints "cout<<" returns. I would like to see the output as in happen in the console when the cout is called.
2- is it worth perhaps to use QTextStream to catch the standard output and display it in a QTextEdit? Any hints on how to do that?

Thanks in advance for your help, if something is not clear please let me know.
Regards,
Annalisa

Dear, the problem is getting serious now that the code takes several minutes to run the calculation.... I have the GUI in stand-by for several minutes, I would like to display the std::cout in the QTextEditor as a stream during the calculation and not all at once at the end as it is now.... is it a problem of repaint?

PLEASE HELP!!!

Annalisa

Did you try implementing

Code:

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virtual std::basic_streambuf::sync();

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in QDebugStream class?

Hi!

Thanks for your answer.
I looked a bit in the web regarding the hint you gave me and I learnt a lot about streams this evening!!! :)

Btw I think I found a simple way of solving my problem, I just add the line

QCoreApplication::processEvents();

every time log_window->append(...) is called inside QDebugStream. I found the solution on this useful link
http://www.qtcentre.org/wiki/index.p...GUI_Responsive
it as drwbacks for multithread application but so far I think is an easy solution for my problem and I don't have to deal with multithread! and most important: IT WORKS

Thanks a lot again for your time and your help!
If you have any further comment on the problem please let me know

Regards
Annalisa

Q

Quote:

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CoreApplication::ProcessEvents();

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I wrote it in the wrong format ...