What is the best way to display an animated icon in a QTableView?

Question

I\'ve been struggling with this for some times now, and I can\'t seem to find the right way to do this.

What I would like is the ability to use an animated icon as a dec

Answer 1

The best solution is to use QSvgRenderer within delegate.

It's very easy to implement and unlike gif, SVG is lightweight and supports transparency.

    TableViewDelegate::TableViewDelegate(TableView* view, QObject* parent)
    : QStyledItemDelegate(parent), m_view(view)
{
    svg_renderer = new QSvgRenderer(QString{ ":/res/img/spinning_icon.svg" }, m_view);

    connect(svg_renderer, &QSvgRenderer::repaintNeeded,
        [this] {
        m_view->viewport()->update();
    });
}


void TableViewDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,
    const QModelIndex& index) const
{
    QStyleOptionViewItem opt{ option };
    initStyleOption(&opt, index);

    if (index.column() == 0) {
        if (condition)
        {
            // transform bounds, otherwise fills the whole cell
            auto bounds = opt.rect;
            bounds.setWidth(28);
            bounds.moveTo(opt.rect.center().x() - bounds.width() / 2,
                opt.rect.center().y() - bounds.height() / 2);

            svg_renderer->render(painter, bounds);
        }
    }

    QStyledItemDelegate::paint(painter, opt, index);
}

Here's a nice website where you can generate your own spinning icon and export in SVG.