Method undo

src/external/qhexview/src/model/commands/removecommand.cpp:11–15

}

void RemoveCommand::undo() {
    m_buffer->insert(m_offset, m_data);
    Q_EMIT m_hexdocument->dataChanged(m_data, m_offset,
                                      QHexDocument::ChangeReason::Insert);
}

void RemoveCommand::redo() {
    m_data = m_buffer->read(m_offset, m_length); // Backup data