[TYPO3] [Extension and Wordspace] How it works ?

[Sylvain Gourvil]

Hi all,

I am new with workspace and i do not understand how it works with my 
extension in frontend.

I developped a news extension taht works.

Now I have to implement frontend preview for it.

Here's my code -- I took a look before to tt_news extension --

        $singleWhere = 'tx_mediaactusop_news.uid=' . 
intval($this->piVars['showUid']);

        $res = $GLOBALS['TYPO3_DB']->exec_SELECTquery(
            '*',
            'tx_mediaactusop_news',
            $singleWhere);

        $row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res);
        // get the translated record if the content language is not the 
default language
        if ($GLOBALS['TSFE']->sys_language_content) {
            $OLmode = ($this->sys_language_mode == 
'strict'?'hideNonTranslated':'');
            $row = 
$GLOBALS['TSFE']->sys_page->getRecordOverlay('tx_mediaactusop_news.uid', 
$row, $GLOBALS['TSFE']->sys_language_content, $OLmode);
        }
        if ($this->versioningEnabled) {
            // get workspaces Overlay
            
$GLOBALS['TSFE']->sys_page->versionOL('tx_mediaactusop_news.uid',$row);
            // fix pid for record from workspace
            
$GLOBALS['TSFE']->sys_page->fixVersioningPid('tx_mediaactusop_news.uid',$row);
        }

But it never get my draft version when admin in draft with preview setted.

How do I manage this in FE ?

Thanks in advance and sorry for noob issue ^^