QStyledItemDelegate + QTreeView::setIndenation causes glitches on text drawing

[MikhailG]

It has been two days I can not get the solution.

I have a custom QStyledItemDelegate and a QTreeView. QTreeView's indentation set to 12. And QStyledItemDelegate's QStyleOptionViewItem::rect set to -12. This set up causes glitches when I change the color of the QTreeView item's text.

void MyItemViewDelegate::initStyleOption(QStyleOptionViewItem* option, const QModelIndex& index) const
{
    if (m_functor->operator ()(index))
    {
        option->rect.adjust(-12, 0, 0, 0);
    }    
}

MyTreeView::MyTreeView(QWidget* parent)
    : QTreeView(parent)
{
    setIndentation(12);
}

What did I miss?

[MikhailG]

So What I forgot to do was to override:

QRect QTreeView::visualRect(const QModelIndex& index) const
   {
       if (m_functor->operator ()(index))
       {
           return QTreeView::visualRect(index).adjusted(-m_indentation, 0, 0, 0);
       }

      return QTreeView::visualRect(index);
   }