rem: MainSpinBox(SpinBox2* sb2, QWidget* parent, const char* name = 0) : SpinBox(parent, name), owner(sb2) { }
add: MainSpinBox(int minValue, int maxValue, int step, SpinBox2* sb2, QWidget* parent, const char* name = 0) : SpinBox(minValue, maxValue, step, parent, name), owner(sb2) { }
context: 				MainSpinBox(SpinBox2* sb2, QWidget* parent, const char* name = 0)				                : SpinBox(parent, name), owner(sb2) { }