[Qt-interest] how to traverse through QStandardItemModel

[wim.delvaux at adaptiveplanet.com]

On Monday 21 June 2010 23:28:31 Malyushytsky, Alex wrote:
> What is wrong with using
> QStandardItem * QStandardItemModel::item ( int row, int column = 0 ) const
> in nested loops - by row and column?

void dumpModel( const QAbstractItemModel * M, const QModelIndex & Top, const 
QString & S ) {
    QModelIndex Item;

    if( ! Top.isValid() ) {
      qDebug() << "Dumping model" << M;
    }

    for( int r = 0; r < M->rowCount( Top );r ++ ) {
      for( int c = 0; c < M->columnCount( Top );c ++ ) {
        Item = M->index( r, c, Top );
        qDebug() << S << r << Item << Item.data( Qt::DisplayRole );
      }
      for( int c = 0; c < M->columnCount( Top );c ++ ) {
        Item = M->index( r, c, Top );
        dumpModel( M, Item, S + " " );
      }
    }
}


> 
> Alex
> 
> 
> From: qt-interest-bounces at trolltech.com
>  [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Valeriy Portnyagin
>  Sent: Monday, June 21, 2010 8:18 AM
> To: qt-interest at trolltech.com
> Subject: [Qt-interest] how to traverse through QStandardItemModel
> 
> hello all,
> I find the simple way for walking through all items in the
>  QStandardItemModel, in instance, like this: - QList<QStandardItem*>
>  model->getAllItems().
>   - QList<QModelIndex> model->getAllItems().
> 
> I leant all function in this class but didn't find something convenient.
>  there is an example with QFileSystemModel:
> 
> QFileSystemModel *model = new QFileSystemModel;
> QModelIndex parentIndex = model->index(QDir::currentPath());
> int numRows = model->rowCount(parentIndex);
> for (int row = 0; row < numRows; ++row) {
>         QModelIndex index = model->index(row, 0, parentIndex);
>         QString text = model->data(index, Qt::DisplayRole).toString();
>         // Display the text in a widget.
>      }
> 
> I don't like such variant.
> 
> So, how i understand i need my own function for the traverse my
>  QStandardItemModel or i have missed something?
> 
> regards,
> Valery Portnyagin.
> 
> 
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