QApplication::clipboard not read textCursor cut

[patrik08]

1- If i cut text on QTextEdit subclass ...
QClipboard *netag = QApplication::clipboard();
QString textclip = netag->text(QClipboard::Selection);

QClipboard cant not read null string .... why?

2- If i take text from TextEdit::keyPressEvent(QKeyEvent *e)

QTextCursor tabact = textCursor();
QString actual = tabact.selectedText();

can read is ok but on console newline ("\n") are on unknow char (?) and

QStringList line = actual.split("\n"); can not split . why? only one line result if select 2 or more line...

void TextEdit::IndentText(const  QString text , int x )
{
const QChar Nline('\n');
 
QClipboard  *netag = QApplication::clipboard();
QString textclip = netag->text(QClipboard::Selection); 
 
QStringList line = textclip.split(Nline);
QStringList newline;
     for (int i = 0; i < line.size(); ++i) {   
      QString onel = QString("\t%1").arg(line.at(i));
      newline.append(onel);
     }
 
qDebug() << "### line!!!   "  << line.size();  /* not correct */
const QString reformat = newline.join(Nline);
 
    netag->clear();
    netag->setText(reformat);
    paste();
}
 
void TextEdit::keyPressEvent(QKeyEvent *e)
{
 
     if (e->key() == Qt::Key_Tab) {
 
            QTextCursor tabact = textCursor();
            int stabstart = tabact.selectionStart();
            int stabstop = tabact.selectionEnd();
            const QString actual = tabact.selectedText();
            if (actual.size() > 3) {
                IndentText(actual,1);
                cut();
                qDebug() << "### stabstart   "  << stabstart; 
                qDebug() << "### stabstop   "  << stabstart; 
                return;
            }
      }

void TextEdit::IndentText(const  QString text , int x )
{
const QChar Nline('\n');

QClipboard  *netag = QApplication::clipboard();
QString textclip = netag->text(QClipboard::Selection); 

QStringList line = textclip.split(Nline);
QStringList newline;
     for (int i = 0; i < line.size(); ++i) {   
      QString onel = QString("\t%1").arg(line.at(i));
      newline.append(onel);
     }
   
qDebug() << "### line!!!   "  << line.size();  /* not correct */
const QString reformat = newline.join(Nline);
   
    netag->clear();
    netag->setText(reformat);
    paste();
}

void TextEdit::keyPressEvent(QKeyEvent *e)
{

     if (e->key() == Qt::Key_Tab) {

            QTextCursor tabact = textCursor();
            int stabstart = tabact.selectionStart();
            int stabstop = tabact.selectionEnd();
            const QString actual = tabact.selectedText();
            if (actual.size() > 3) {
                IndentText(actual,1);
                cut();
                qDebug() << "### stabstart   "  << stabstart; 
                qDebug() << "### stabstop   "  << stabstart; 
                return;
            }
      }

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