c++qtqfilesystemwatcherqfileinfo

Why does QFileSystemWatcher emit multiple signals? and QFileInfo for the first time writes a zero file size

When a file is changed, the signal should fire 1 time, but for me it works several times.

In setings function, I request size and it prints

parser::parser(QObject *parent) : QObject(parent)
{
    setings();
    qDebug()<< baseWay <<"\n";

    fsWatcher = new QFileSystemWatcher();
    fsWatcher->addPath( baseWay + "auth.log" );
    QObject::connect(fsWatcher, SIGNAL( fileChanged(QString) ), this, SLOT( changed(QString) ));
}

After I change the document, the signal processes 2 times, although I saved the document and changed it 1 time.

void parser::changed(const QString &flName)
{
    QFileInfo qfi(flName);
    qDebug() << "name = " << flName << "size = " << qfi.size();
}

Why does QFileSystemWatcher give a signal 2 times?

Why does QFileInfo produce a zero size on the first request?

I edit the file Notepad ++

Solution

  • The problem was in the text editor and its methods of working with the file.