How to dispay an icon in the first column of QTreeView

[yogeshm02]

Hi!

Here is what i need: Display an icon in the first column of QTreeView. Icon should remain at 1st column even if the column is dragged to some other position.


Here is what i did: Inherited from QAbstractItemDelegate to create a GItemDelegate whose paint method has something like this

QTreeView *t_view = qobject_cast<QTreeView*>(parent());
    if(t_view)
    if(t_view->header()->visualIndex(index.column()) == 0){
        value = model->data(index, Qt::DecorationRole);
        pixmap = decoration(opt, value);
        pixmapRect = (pixmap.isNull() ? QRect(0, 0, 0, 0):QRect(QPoint(0, 0), option.decorationSize));
    }

QTreeView *t_view = qobject_cast<QTreeView*>(parent());
    if(t_view)
    if(t_view->header()->visualIndex(index.column()) == 0){
        value = model->data(index, Qt::DecorationRole);
        pixmap = decoration(opt, value);
        pixmapRect = (pixmap.isNull() ? QRect(0, 0, 0, 0):QRect(QPoint(0, 0), option.decorationSize));
    }

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New problem: Documentation for header()->visualIndex say that

Hidden sections still have valid visual indexes

Hence, if first column is hidden icon is not visible.
-----------------------------------------------------------
So the question is how to (quickly) determine the first visible column of QTreeView in GItemDelegate.

Thanks

[axeljaeger]

I suggest iterating over all sections from 0 to header()->count() and check for each section wether it's visible. If it is visible, show the icon. If it is not visible, go on with the next section.