getting data out of the simple tree model example

[qt_gotcha]

Fooling around with the treemodel, I hoped this would work. I want to wrte the contents of the treemodel in the simpletreemodel example to a text file. I thought the index function would get the correct data from the child items if the column counter > 0, so that the contents of the children are simply accessible with model.data(i,j). All I get is a list of contents of the parent items (so at index i,0) , I cannot acces the content of the children.

QFile fout("some.txt");
    fout.open(QIODevice::ReadWrite);
    for (int i = 0; i < model.rowCount(); i++)
    {
        QString S = "";
        for (int j = 0; j  < model.columnCount(); j++)
        {
	QVariant d = model.data(model.index(i,j),0);
	S = S + d.toString()+";";
         }
         S = S + "\n";
        QByteArray line(S.toAscii());
         fout.write(line);
    }
    fout.close();

QFile fout("some.txt");
    fout.open(QIODevice::ReadWrite);
    for (int i = 0; i < model.rowCount(); i++)
    {
        QString S = "";
        for (int j = 0; j  < model.columnCount(); j++)
        {
	QVariant d = model.data(model.index(i,j),0);
	S = S + d.toString()+";";
         }
         S = S + "\n";
        QByteArray line(S.toAscii());
         fout.write(line);
    }
    fout.close();

To copy to clipboard, switch view to plain text mode 

my reasoning is not correct obviously, but I don't get it. Thanks

[qt_gotcha]

ok, I am thinking about this as a table, every parent has a different nr children, and each child has several strings in my case (a data input structure for some software I am making). This works better :

QFile fout("hup.txt");
    fout.open(QIODevice::ReadWrite);
    for (int i = 0; i < model.rowCount(); i++)
    {
	    QVariant d = model.data(model.index(i,0),0); // parent
	    QString S = "["+QString::number(i)+"-" + QString::number(0) + "] " + d.toString()+";\n";
 
	    QModelIndex indexParent = model.index(i, 0);
		for (int j = 0; j < model.rowCount(indexParent); j++)
		{
			S = S + "["+QString::number(i)+"-" + QString::number(j) + "] ";
 
    		for (int k = 0; k < model.columnCount(indexParent); k++)
    		{
    			d = model.data(model.index(j, k, indexParent),0);
    			S = S + d.toString()+";";
    		}
    		S = S + "\n";
		}
    	QByteArray line(S.toAscii());
		fout.write(line);
    }
    fout.close();

QFile fout("hup.txt");
    fout.open(QIODevice::ReadWrite);
    for (int i = 0; i < model.rowCount(); i++)
    {
	    QVariant d = model.data(model.index(i,0),0); // parent
	    QString S = "["+QString::number(i)+"-" + QString::number(0) + "] " + d.toString()+";\n";

	    QModelIndex indexParent = model.index(i, 0);
		for (int j = 0; j < model.rowCount(indexParent); j++)
		{
			S = S + "["+QString::number(i)+"-" + QString::number(j) + "] ";

    		for (int k = 0; k < model.columnCount(indexParent); k++)
    		{
    			d = model.data(model.index(j, k, indexParent),0);
    			S = S + d.toString()+";";
    		}
    		S = S + "\n";
		}
    	QByteArray line(S.toAscii());
		fout.write(line);
    }
    fout.close();

To copy to clipboard, switch view to plain text mode