QTextDocument find and regular expresion

[oficjalne100]

Hello
I write text editor and I want to remove trailing spaces from document before save. I think the right way is to use
QTextCursor QTextDocument::find(const QRegExp & expr, int position = 0, FindFlags options = 0) const
for that. So I write regular expression and I tested it in separated program (based on regexp example from qt framework). But sadly it not works and I don't known why. It seems that problem lies in \n character. My code is below (both regexps don't work). Please tell me what I am doing wrong.

best regards
Szyk Cech

QTextCursor lOrgPosition = aEditor->textCursor();
        //QRegExp lRe(QString("(?: |\\t)+") + QChar(0x2029));
        QRegExp lRe("(?: |\\t)+\\n");
        lRe.setMinimal(true);
 
        QTextDocument* lDoc = aEditor->textCursor().document();
        QTextCursor lCursor = lDoc->find(lRe, 0);
        while(!lCursor.isNull())
        {
            lCursor.removeSelectedText();
            lCursor = lDoc->find(lRe, lCursor.position());
        }
        aEditor->setTextCursor(lOrgPosition);

QTextCursor lOrgPosition = aEditor->textCursor();
        //QRegExp lRe(QString("(?: |\\t)+") + QChar(0x2029));
        QRegExp lRe("(?: |\\t)+\\n");
        lRe.setMinimal(true);

        QTextDocument* lDoc = aEditor->textCursor().document();
        QTextCursor lCursor = lDoc->find(lRe, 0);
        while(!lCursor.isNull())
        {
            lCursor.removeSelectedText();
            lCursor = lDoc->find(lRe, lCursor.position());
        }
        aEditor->setTextCursor(lOrgPosition);

To copy to clipboard, switch view to plain text mode