How to save a treeview as .csv file in Qt?

[fbengo]

I need to save the current view of my QTreeView (QSortFilterProxyModel and QStandardItemModel) as a .csv file. Unfortunately, I don't know where to start...

My code only prints the parent (root) items. I need to print both parents and their children.
I think this can be solved by recursion, but I am not sure how... Any ideas?

My treeview:

http://i.imgur.com/R9rvPDh.png

My code:

QFile file(filePath);
            if (file.open(QFile::WriteOnly))
            {
                QTextStream stream(&file);              
                for (int i = 0; i < proxyModel->rowCount(); i++)
                {
                    QModelIndex index0 = proxyModel->index(i, 0);
                    QModelIndex index1 = proxyModel->index(i, 1);
                    QModelIndex index2 = proxyModel->index(i, 2);
                    QModelIndex index3 = proxyModel->index(i, 3);
                    QModelIndex index4 = proxyModel->index(i, 4);
                    stream << proxyModel->data(index0).toString() << "," <<  proxyModel->data(index1).toString() << "," << proxyModel->data(index2).toString() << "," << proxyModel->data(index3).toString() << "," << proxyModel->data(index4).toString();
                    stream << "\n";                 
                }
                file.close();
            }

Ouput:

(0008,0005),SpecificCharacterSet,CS,10,ISO_IR 100
(0008,0008),ImageType,CS,36,ORIGINAL\PRIMARY\M\HEADER_CORRECTED
(0008,0016),SOPClassUID,UI,26,1.2.840.10008.5.1.4.1.1.4
(0008,0018),SOPInstanceUID,UI,46,1.3.12.2.1107.5.2.5.11090.5.0.5823661031981777
(0008,0020),StudyDate,DA,8,20040305
(0008,0021),SeriesDate,DA,8,20040305
(0008,0022),AcquisitionDate,DA,8,20040305
(0008,0023),ContentDate,DA,8,20040305
(0008,0030),StudyTime,TM,14,085922.859000
(0008,0031),SeriesTime,TM,14,090019.359000
(0008,0032),AcquisitionTime,TM,14,085939.762492
(0008,0033),ContentTime,TM,14,090021.062000
(0008,0050),AccessionNumber,SH,2,0
(0008,0060),Modality,CS,2,MR
(0008,0070),Manufacturer,LO,8,SIEMENS
(0008,0080),InstitutionName,LO,18,cJf7JCqV84P^te1az
(0008,0090),ReferringPhysicianName,PN,20,FLp8xklEDWOqavQWiJ9
(0008,1010),StationName,SH,8,unknown
(0008,1030),StudyDescription,LO,12,WRIST^RIGHT
(0008,103e),SeriesDescription,LO,18,SCOUT 3-PLANE RT.
(0008,1070),OperatorsName,PN,14,RIORDAN, JAMES

[raven-worx]

@fbengo

void someFunction()
{
        QFile file(filePath);
            if (file.open(QFile::WriteOnly))
            {
                QTextStream stream(&file);
                this->printTree( 0, QModelIndex(), stream );
                file.close();
            }
}

void printTree( int level, const QModelIndex & index, QTextStream  & stream )
{
         QString indent;
         for( int j = 0; j < level; ++j )
             indent.append( "   " );

        // print index itself
        if( index.isValid() )
        {
             stream << indent;
             for( int c = 0; c < index.model()->columnCount(index.parent()); ++c )
             {
                     QModelIndex columnIndex = index.sibling(index.row(), c);
                     stream << index.data().toString();
             }
             stream << "\\n";
       }

       //print children
       for (int r = 0; r < index.model()->rowCount(index); r++)
        {
               const QModelIndex childIndex = index.child( r, 0 );
                this->printTree( level+1, childIndex, stream );
        }
}

No guarantee that it works - wrote it straight down from my head - but i hope it gives you an idea, how the recursion can be done.

[fbengo]

This post is deleted!

[fbengo]

@raven-worx

Thank you very much for your effort, but I have still a question...
How do I use this on my proxyModel?

NEVERMIND, I FOUND THE MISTAKE :)

 for( int c = 0; c < index.model()->columnCount(index.parent()); c++)
             {
                     QModelIndex columnIndex = index.sibling(index.row(), c);
                     stream << index.data().toString();
             }

SHOULD BE:

 for( int c = 0; c < index.model()->columnCount(index.parent()); c++)
             {
                     QModelIndex columnIndex = index.sibling(index.row(), c);
                     stream << columnIndex .data().toString();
             }

THANK YOU SOOOO MUCH FOR YOUR HELP!! I cannot believe how you can get up with this, without trying :) I am new in the Qt world and one day I wil also be experienced as you.. :P

[raven-worx]

@fbengo
oops..sry my bad.
but as i said... straight from my head :)

just adapt the starting method:

void someFunction()
{
        QFile file(filePath);
            if (file.open(QFile::WriteOnly))
            {
                QTextStream stream(&file);
                for (int r = 0; r < model->rowCount(); r++)
                        this->printTree( 0, model->index(r,0), stream );
                file.close();
            }
}