Show Icons in Header of QTreeView

[blackbubblegum]

Hey there,

I have a QTreeView and reimplemented a QStandardItemModel. For some special columns I want to display icons instead of text. So I rewrote QStandardItemModel::headerData(...). I should return a QVariant created with an Icon at these columns. But the icon is not shown in the QTreeView. Instead the header is empty there.

My code looks like this:

QVariant result = QStandardItemModel::headerData( section,
                                                  orientation,
                                                  role
                                                  );
 
    if (result.toString().compare(QString("Special Column")) == 0)
    {
        QPixmap pixmap = QPixmap(5, 5);
        pixmap.fill(Qt::red);
        QIcon icon = QIcon(pixmap);
        result.setValue(icon);
    }
    return result;

QVariant result = QStandardItemModel::headerData( section,
                                                  orientation,
                                                  role
                                                  );
    
    if (result.toString().compare(QString("Special Column")) == 0)
    {
        QPixmap pixmap = QPixmap(5, 5);
        pixmap.fill(Qt::red);
        QIcon icon = QIcon(pixmap);
        result.setValue(icon);
    }
    return result;

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I tried it with returning a lot of different Variants (icon, string, pixmap etc.) but nothing except QString works.

Did I mised something?
Do I need to reimplement paint from HeaderView?

Thanks and happy new year to all of you,
bbg