Generating Log files

Hi

I want to generate a log file for my application. Does Qt have any inbuilt function for that??

I am using qDebug to return some information during the execution of the process.

I want to put all my qDebug and qWarnings into a log file along with the time of generation of the text.

I can stream the qDebug into a file,before i do that, i want to know if there are any inbuilt function.

have a look at qInstallMsgHandler, you can install your message handler which will save qDebug info into file. also read this thread.

thanks mate. the thread and the qInstallMsgHandler helped.

But the log file keeps on writing in the same line. it doesnt go to the next line.
there is a endl in the code.

any ideas as to how to fix this?

that code works fine for me. :)

I am using this code

Code:

---

void myMessageHandler(QtMsgType type, const char *msg)
{
    QString txt;
    QDateTime date;
 
    txt = msg;
    txt.prepend(" - ");
    txt.prepend(date.currentDateTime().toString());
 
    QFile outFile("log.txt");
    outFile.open(QIODevice::WriteOnly | QIODevice::Append);
    QTextStream ts(&outFile);
    ts << txt <<endl<<flush;
 
 
}
 
int main(int argc, char *argv[])
{
    qInstallMsgHandler(myMessageHandler);
    QApplication a(argc, argv);
    MainWindow w;
    return a.exec();
}

---

I am able to get all the data in 1 line

Quote:

---

Tue Jul 14 10:15:54 2009 - i am in debug
Tue Jul 14 10:16:06 2009 - i am in debug

---

One more question, will qDebug work only if the app is built in debug mode??

try to pass "\n" instead of endl.. QTextStream takes care of unix and windows line deliminaters.
qDebug will work in debug mode only i think.

i am not able to see the text in the new line only if i open the file in notepad.

If I open the same file in wordpad its all written in different lines.

weird

thanks for the info.

I've just ran code again and got the following result

Quote:

---

Tue Jul 14 16:19:47 2009 - "00in.png"
Tue Jul 14 16:19:47 2009 - "00out.png"
Tue Jul 14 16:19:47 2009 - "01in.png"
...

---

i.e. works fine, btw in release mode I had the same result.
PS. what platform do you use? what is Qt's version? I've tested on windows.

I am using Qt 2.1 and it is working even in release mode.

I am able to get each statement in a new line if I open the file in wordpad.

thanks for the help

HOLY COW!! ... Qt 2.1...!!!!!!

Quote:

---

Originally Posted by srohit24

I am using Qt 2.1 and it is working even in release mode.

I am able to get each statement in a new line if I open the file in wordpad.

thanks for the help

---

wow, I don't even know what to say :p

I have installed this

qt-sdk-win-opensource-2009.02.1.exe

so, this is not Qt 2.1, this is Qt 4.5.x.
is the problem solved?