QTextEdit - disable paste()

Hi all,

For 2 days I'm fighting with QTextEdit to disable pasting. I disabled Ctrl+P by keyPressEvent().
I don't know how to grab Middle Mouse Button (linux shortcut fo paste).

Code:

---

void Edytor::mousePressEvent ( QMouseEvent * e ) {
 
  if(e->button()==(Qt::MidButton)){
    qDebug()<<"middle";
    e->accept();
    return;
  };
  QTextEdit::mousePressEvent(e);
};

---

When I use above it shows 'middle' but also takes default action (pastes text).
Any idea?

There is a chance the following works.

Code:

---

if(event->buttons().test(Qt::MidButton)) {
  return;
}

---

Otherwise you can reimplement QTextEdit::insertFromMimeData like this

Code:

---

class Edit : public QTextEdit
{
public:
  //the following effectively disables paste (as well as drop)
  void insertFromMimeData(const QMimeData *src) {}
};

---

Edit:
However note that the above will also disable text drop. You can tackle that by setting a flag in dragEnterEvent and checking the same in the reimplemented insertFromMimeData method.
Do read the docs for clear picture.

Thank you for reply.
First is same I did.

I've also tried the second before

Code:

---

bool Edytor::canInsertFromMimeData (const QMimeData*){
  qDebug()<<"CanInsert";
  return false;
};
 
void Edytor::insertFromMimeData (QMimeData*){
  qDebug()<<"Insert";
  return;
};

---

But it doesn't work too.

I checked qt source code.

Code:

---

void QTextEdit::paste()
{
    Q_D(QTextEdit);
    d->control->paste();
}

---

d is instance of QTextEdit.
Line d->control->paste() invokes paste method of QTextControl class.
Which looks like below:

Code:

---

void QTextControl::paste()
 {
     const QMimeData *md = QApplication::clipboard()->mimeData();
     if (md)
         insertFromMimeData(md);
 }

---

It invokes insertFromMimeData(QMimeData *src) but not from QTextEdit but from QTextControl to which I have no access.

Am I wrong somewhere?

Any further developments here? I also tried sub-classing QTextEdit and overriding canInsertFromMimeData (const QMimeData*) as the docs seem to indicate should work, but if doesn't for me. I also tried overriding canPaste() without success. Any other ideas?

Thanks,

Rob