QStyledItemDelegate with QListView grows, but doesn't shrink



  • I have a class derived from QStyledItemDelegate that I am using to display HTML in a QListView. In order to bind my item delegate to the QListView, I use the following:

    ui->myListView->setItemDelegate(new HTMLDelegate(this));
    

    The QListView has defaults set, with the exception of the resizeMode property, which I have changed from Fixed to Adjust.

    From the sizeHint method, the option.rect property only reflects growth, not shrinking, which causes my resulting undesired behavior:

    QSize HTMLDelegate::sizeHint(const QStyleOptionViewItem &option,
                                 const QModelIndex &index) const
    {
        QStyleOptionViewItemV4 options = option;
        initStyleOption(&options, index);
    
        QTextDocument doc;
        doc.setHtml(index.data().toString());
        doc.setTextWidth(option.rect.width());
        return QSize(doc.idealWidth(), doc.size().height());
    }
    

    I can manually call a reset() on the QListView, and that will properly resize my items, but it also deselects any selected items. Sure, I could re-select the item, but I don't really see it as an elegant solution.

    Any ideas around my problem?


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