CODEWITHSUNDEEP
c++qtqt5
Michal
Michal

Reputation: 2039

Is QFileInfo synchronized with file?

Is QFileInfo synchronized with source file? Or it just stores information from the time when the instance was created?

In otherwords, if I create QFileInfo instance for my file. Then I change the file. And then, I create second instance of QFileInfo for this file, will they have different lastModified value?

Upvotes: 3

Views: 197

Answers (1)

Marco
Marco

Reputation: 2020

QFileInfo is not syncronized, the information is read when the object is created.

I have used this small example to verify it.

If you run this in a terminal and then change the file you will see the date changing when you save the file.

#include <QCoreApplication>
#include <QDebug>
#include <QFileInfo>
#include <QDateTime>
#include <QThread>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    while (1)
    {
        QFileInfo f("./file.txt");
        qDebug() << f.lastModified().toString();
        QThread::sleep ( 1 );
    }
    return a.exec();
}

Upvotes: 5

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