using drawCheck() to customize checkbox in QTableView

[nimaweb]

Hi folks,
My QTableView is shown in the picture below. As you see the Online column and the Locked column are checkable.

But what I'm having difficulty with is how to customize the check indicator. I want my QTableView like what is shown in the following picture (it's gimped):

As you already might have guessed, I should implement this protected function in my delegate:

void QItemDelegate::drawCheck ( QPainter * painter, const QStyleOptionViewItem & option, const QRect & rect, Qt::CheckState state ) const

void QItemDelegate::drawCheck ( QPainter * painter, const QStyleOptionViewItem & option, const QRect & rect, Qt::CheckState state ) const

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As you can see, I want to show two different images (actually four) considering which column is being rendered. But drawCheck doesn't provide any argument which shows which column is being rendered (like a QModelIndex).