//main.cpp
int main(int argc, char** argv) {
	QApplication app(argc, argv);
	nupProcess* nup = new nupProcess(argv[1]);
	mainDialog* mainWindow = new mainDialog();

	// connect mainWindow with nup
	QObject::connect(mainWindow->getHorizontalNupSpinBox(), SIGNAL(valueChanged(int)), nup, SLOT(setHorizontalNup(int)));

	mainWindow->show();
	return app.exec();
}

//parts of mainDialog.cpp
mainDialog::mainDialog() : QDialog(), Ui::designerMainDialog()
{
	setupUi(this);
	connect(deltaConnectionPushButton, SIGNAL(toggled(bool)), this, SLOT(setDeltaConnectionIcon(bool)));
}


mainDialog::~mainDialog()
{
}

QSpinBox* mainDialog::getHorizontalNupSpinBox() {
	return horizontalNupSpinBox;
}

QSpinBox* mainDialog::getVerticalNupSpinBox() {
	return verticalNupSpinBox;
}

//parts of nupprocess.h
#ifndef NUPPROCESS_H
#define NUPPROCESS_H

#include <QString>
#include <QObject>

/**
	@author Christian Haene <christian.haene@gmx.ch>
*/
class nupProcess : QObject {
	Q_OBJECT
....
public slots:
	void setHorizontalNup(int number);
	void setVerticalNup(unsigned int number);