[QScintilla] Discovery the correct TextCursor QRect / Coordinate

[PPK-Webprogramm]

Hi all on list,

i have implement on QsciScintilla  the QT4 QCompleter [ 
http://doc.trolltech.com/4.2/qcompleter.html ] combobox and its run 
Super.. i grab data from a sqlite3 database file ...  + user words.

I can grab and save word on 
http://www.qt-apps.org/content/show.php/QKeyWord+grep+Robot+-+Word-Completer?content=59422

Now my problem i can not find the correct QRect from TextCursor,  how i 
find it?

to start or not the QCompleter i use :

class QSCINTILLA_EXPORT QsciScintilla : public QsciScintillaBase
{
    Q_OBJECT

public:
.......
inline QString TextUnderCursor() {
    return getWord(SendScintilla(SCI_GETCURRENTPOS));
    }
........

How to make the same to have it QRect 
http://doc.trolltech.com/4.3/qrect.html  ?

http://www.qtcentre.org/forum/f-qt-programming-2/t-move-qcompleter-on-qrect-xy-8421.html
screenshoot:
http://www.qtcentre.org/forum/attachment.php?attachmentid=1456&d=1186397139


Best regards  Peter Hohl