QTextEdit - disable paste()

[Gopala Krishna]

There is a chance the following works.

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

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

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Otherwise you can reimplement QTextEdit::insertFromMimeData like this

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

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

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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.