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copied!<p>Just to complete the whole picture: further one can find the code to manage the QWidget as QListView item using delegates.</p> <p>I finally found out how to make it work within the subclass of QStyledItemDelegate using its paint(...) method. </p> <p>It seems more effective for performance than previous solution, but this statement one needs to verify =) by investigation what does setIndexWidget() do with created QWidget.</p> <p>So finally, here is the code:</p> <pre><code>class PackageListItemWidget: public QWidget </code></pre> <p>.....</p> <pre><code>class PackageListItemDelegate: public QStyledItemDelegate </code></pre> <p>.....</p> <pre><code>void PackageListItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const { // here we have active painter provided by caller // by the way - we can't use painter->save() and painter->restore() // methods cause we have to call painter->end() method before painting // the QWidget, and painter->end() method deletes // the saved parameters of painter // we have to save paint device of the provided painter to restore the painter // after drawing QWidget QPaintDevice* original_pdev_ptr = painter->device(); // example of simple drawing (selection) before widget if (option.state & QStyle::State_Selected) painter->fillRect(option.rect, option.palette.highlight()); // creating local QWidget (that's why i think it should be fasted, cause we // don't touch the heap and don't deal with a QWidget except painting) PackageListItemWidget item_widget; // Setting some parameters for widget for example // spec. params item_widget.SetPackageName(index.data(Qt::DisplayRole).toString()); // geometry item_widget.setGeometry(option.rect); // here we have to finish the painting of provided painter, cause // 1) QWidget::render(QPainter *,...) doesn't work with provided external painter // and we have to use QWidget::render(QPaintDevice *,...) // which creates its own painter // 2) two painters can't work with the same QPaintDevice at the same time painter->end(); // rendering of QWidget itself item_widget.render(painter->device(), QPoint(option.rect.x(), option.rect.y()), QRegion(0, 0, option.rect.width(), option.rect.height()), QWidget::RenderFlag::DrawChildren); // starting (in fact just continuing) painting with external painter, provided // by caller painter->begin(original_pdev_ptr); // example of simple painting after widget painter->drawEllipse(0,0, 10,10); }; </code></pre>

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