QTableWidget has the line -1?

[LowEel]

Hi All,

I am pretty new to Qt development, so today I tried to do something easy, like showing a list of filenames into a QTableWidget.
By itself the code is not so complex:

#include <QApplication>
#include <QDir>
#include <QDebug>
#include <QTableWidget>
#include <QMainWindow>

int main(int argc, char *argv[])
{
     QApplication app(argc, argv);
     QMainWindow *finestra = new QMainWindow();

     QDir path("/etc/tinc/bosenet/hosts/");
    //two files here
     QStringList files = path.entryList(QDir::Files);
     qDebug() << files.count() << files ;


     QTableWidget*  tabella = new QTableWidget();
     tabella->setRowCount(files.count() );
     tabella->setColumnCount(1);
     tabella->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);


     int row = -1;
     foreach (QString filename , files  )
     {
         qDebug() << files.count() << row <<  filename ;
         tabella->setItem(row,1, new QTableWidgetItem(filename)  );
         row++;
     }

    finestra->setCentralWidget(tabella);
    finestra->show();

    return app.exec();
}

the problem is that, it only shows the 2 files when the initial row index is set to -1 . Which makes me crazy, since I was thinking it should start with 0.

If I put the initial value to 0, it still works, just showing the first row empty, and the second one with the first file name.
I put some qDebug lines (see the code) to see what's happening, and the debug was:

2 ("RedOctober", "Vulvatron")
2 -1 "RedOctober"
2 0 "Vulvatron"

("RedOctober" and "Vulvatron" are the two files into the folder).

it is not a problem by itself: once I know that this should start with -1, ok for me.

I am using QT 5.5.1 on Linux Lubuntu g++ (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609

Is it a bug, or something?
I am afraid If I write everything starting with -1 , then it will not compile on other systems.

Thanks in advance.

[SGaist]

Hi and welcome to devnet,

You're on the wrong column, it should be 0.