GridFieldOrderableRows::getColumnContent PHP Method

    public function getColumnContent($grid, $record, $col)
    {
        // In case you are using GridFieldEditableColumns, this ensures that
        // the correct sort order is saved. If you are not using that component,
        // this will be ignored by other components, but will still work for this.
        $sortFieldName = sprintf('%s[GridFieldEditableColumns][%s][%s]', $grid->getName(), $record->ID, $this->getSortField());
        $sortField = new HiddenField($sortFieldName, false, $record->getField($this->getSortField()));
        $sortField->addExtraClass('ss-orderable-hidden-sort');
        $sortField->setForm($grid->getForm());
        return ViewableData::create()->customise(array('SortField' => $sortField))->renderWith('GridFieldOrderableRowsDragHandle');
    }