On a second though, the actual error seems to be elsewhere, so still can use proper indexing
#include <QScrollArea>
#include <QMainWindow>
#include <QLabel>
#include <QListWidget>
#include <QPushButton>
#include "pixlabel.h"
class MyWindow : public QMainWindow
{
Q_OBJECT
public:
MyWindow(QWidget * parent = 0, Qt::WFlags flags = 0);
private:
QScrollArea * sa_xy;
PixLabel * xy;
QPushButton * buttAdd;
QPushButton * buttCode;
QPushButton * buttSave;
QPushButton * buttLoad;
private slots:
void Code();
void Save();
void Load();
};