When using a custom delegate to paint the items of a QTableWidget, how can the delegate be configured to use the correct background colour for selected items?

[Bastian]

Hi,

Normally, when a QTableWidget item is selected, the background appears dark blue, but when I use a custom delegate to paint the items (taken from a Stack Overflow post, https://stackoverflow.com/questions/1956542/how-to-make-item-view-render-rich-html-text-in-qt/1956781#1956781) the background appears light blue instead.

What do I need to do to match the original behaviour when using the delegate?

Thanks.

[mrjj]

Hi
Add some extra code to the painting (set the brush)

void HtmlDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                         const QModelIndex &index) const
{
    QStyleOptionViewItemV4 optionV4 = option;
    initStyleOption(&optionV4, index);

    QStyle *style = optionV4.widget ? optionV4.widget->style() : QApplication::style();

    QTextDocument doc;
    doc.setHtml(optionV4.text);

    /// Painting item without text
    optionV4.text = QString();

    if (option.state & QStyle::State_Selected) { //////////// new
        painter->setPen(Qt::white);
        painter->setBrush(option.palette.highlightedText());
    }

    style->drawControl(QStyle::CE_ItemViewItem, &option, painter, option.widget); // slightly changed

    QAbstractTextDocumentLayout::PaintContext ctx;

    // Highlighting text if item is selected
    if (optionV4.state & QStyle::State_Selected) {
        ctx.palette.setColor(QPalette::Text, optionV4.palette.color(QPalette::Active,
                                                                    QPalette::HighlightedText));
        ctx.palette.setColor(QPalette::Highlight, Qt::green);
        ctx.palette.setColor(QPalette::Base, Qt::green);
    }

    QRect textRect = style->subElementRect(QStyle::SE_ItemViewItemText, &optionV4);
    painter->save();
    painter->translate(textRect.topLeft());
    painter->setClipRect(textRect.translated(-textRect.topLeft()));
    doc.documentLayout()->draw(painter, ctx);
    painter->restore();
}

[Bastian]

@mrjj Thanks! That's fixed it.