Help with the basics setting up a Qt Gui

Hi all!

I'm really just getting started with Qt and learning the basics. Historically I've only ever really done Command Line driven stuff, with minimal event drivers.

I wrote a Sudoku Solver in C++ (big whoop I know, but we all started somewhere!). I'd trying to put a Gui together, but I'm really struggling with the basics here. I'd like to set up a 9x9 grid where such that I can display the results of my solver. I thought of using QTableWidget for this, but that was a bit a of a disaster. I thought about doing just a simple matrix of 81 text boxes but can't understand how the gridlayout widget works (is it just me or does a lot of the Qt documentation leave a lot of to be desired - a few examples surely wouldn't kill them). Also - with the 81 text boxes approach, it seems so in-elegant.

Anyway, I thought I'd appeal to the good nature of the coding community and say that I'd really appreciate some handholding.

Thank you in anticipation of your help!

I hope you will find it useful

Code:

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#include <QtCore>
#include <QtWidgets>
 
int main(int argc, char * argv[])
{
    QApplication app(argc,argv);
 
    QWidget mainWidget;
    mainWidget.setWindowTitle("3x3x3x3");
 
    QGridLayout * mainLayout = new QGridLayout(&mainWidget);
    mainLayout->setSpacing(0);
 
    for(int mr = 0; mr < 3; mr++)
    {
        for(int mc = 0; mc < 3; mc++)
        {
            QFrame * widget = new QFrame;
            widget->setFrameStyle(QFrame::Plain);
            widget->setFrameShape(QFrame::Box);
 
            QGridLayout * gridLayout = new QGridLayout(widget);
            gridLayout->setSpacing(0);
            gridLayout->setMargin(0);
 
            for(int r = 0; r < 3; r++)
            {
                for(int c = 0; c < 3; c++)
                {
                    QLabel * tile = new QLabel("X");
                    tile->setFrameStyle(QFrame::Plain);
                    tile->setFrameShape(QFrame::Box);
                    tile->setMargin(5);
 
                    gridLayout->addWidget(tile, r, c, 1, 1, Qt::AlignCenter);
                }
            }
 
            mainLayout->addWidget(widget, mr, mc, 1, 1, Qt::AlignCenter);
        }
    }
 
    mainWidget.show();
 
    return app.exec();
}
 
#include "main.moc"

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Attachment 9414