CodeTransfer

void PianoRoll::humanizeNotesLen() { 
    //length ver.
    //The method will humanize position of a selection of notes
    //First note is not changed.
    if(! hasValidPattern())
    {
        return;
    }
    int lower = 1;//Humanize/span is 1..4/192 in size
    int upper = 4;
    int subt = 1; //shift between adding and subtracting position
    int adder = 100;
    bool firstDone = false; //make first note in collection untouched
                            //Insures that no note can get a negative position 
    // Use current time as seed for random generator
    srand(time(0));
    m_pattern->addJournalCheckPoint();
    NoteVector notes = getSelectedNotes();//selected notes only
    for(Note* n : notes)
    {
        if(firstDone){ //==False, first note should not be moved
        int rr = rand() % (upper - lower + 1) + lower;
        int signer = rand() % (adder - subt + 1) + lower;
        if (signer < 50) n->setPos(n->pos() - rr);
        else n->setPos(n->pos() + rr);
        firstDone = true; //insures that note2..n is shufled
        }
    }
    m_pattern->rearrangeAllNotes();
    m_pattern->updateLength();
    m_pattern->dataChanged();
    update();//Project is changed. Update
    gui->songEditor()->update();
    Engine::getSong()->setModified();
}