Change text color of a specific column for QTreeView

Question

I have widget that inherits from QTreeView, and I want to change the text color, but only for a specific column. Currently I set the stylesheet, so the entire row changes the text color to red when the item is selected.

QTreeView::item:selected {color: red}

I want to change only the color of the first column when the item is selected. I know how to change the colour for specific columns (using ForegroundRole on the model and checking the index column), but I don't know how to do check if the index is selected in the model.

Answer 1

You can use a delegate for that:

class MyDelegate : public QStyledItemDelegate {
public:
    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const {
        if (option.state & QStyle::State_Selected) {
            QStyleOptionViewItem optCopy = option;
            optCopy.palette.setColor(QPalette::Foreground, Qt::red);
        }
        QStyledItemDelegate::paint(painter, optCopy, index);
    }
}

myTreeWidget->setItemDelegateForColumn(0, new MyDelegate);