Is it possible to make the Qt-ros-pkg blank?

edit

Hi I'm new in Qt creator and ROS, I just download qt-ros-pkg recently and found out that it actually has logging part already, however, what I need is a blank main_window, where I am able add things in it. I actually make the code build perfectly and run perfectly, but it shows nothing. and here is my code.

Main_window.hpp

/**
 * @file /include/qtros/main_window.hpp
 *
 * @brief Qt based gui for qtros.
 *
 * @date November 2010
 **/
/**
 * @file /include/qtros/main_window.hpp
 *
 * @brief Qt based gui for qtros.
 *
 * @date November 2010
 **/
#ifndef qtros_MAIN_WINDOW_H
#define qtros_MAIN_WINDOW_H


#include <QtGui/QMainWindow>
#include "ui_main_window.h"
#include "qnode.hpp"

namespace Ui {

class MainWindow : public QMainWindow
{
  Q_OBJECT

public:
  MainWindow(QWidget *parent = 0);
  ~MainWindow();





private Q_SLOTS:
  void on_pushButton_clicked();


private:
  Ui::MainWindowDesign ui;

};

}



#endif // MAINWINDOW_H

main.cpp

/**
 * @file /src/main.cpp
 *
 * @brief Qt based gui.
 *
 * @date November 2010
 **/
/*****************************************************************************
** Includes
*****************************************************************************/


#include <QApplication>
#include "../include/qtros/main_window.hpp"
#include "ui_main_window.h"
#include <QtGui>

/*****************************************************************************
** Main
*****************************************************************************/
int main(int argc, char **argv)
{
  QApplication app(argc, argv);

 return 0;

}

main_window.cpp
/**
 * @file /src/main_window.cpp
 *
 * @brief Implementation for the qt gui.
 *
 * @date February 2011
 **/
/*****************************************************************************
** Includes
*****************************************************************************/


#include "../include/qtros/main_window.hpp"
#include <iostream>
#include <QtGui>
#include <QMessageBox>


namespace Ui {
using namespace Qt;

MainWindow::MainWindow(QWidget *parent) :
  QMainWindow(parent)


{
  ui.setupUi(this);
}

MainWindow::~MainWindow() {}



}




void Ui::MainWindow::on_pushButton_clicked()
{

}

Application Output

Starting /home/piaoqingmei/catkin_ws/src/build-qtros-Desktop_GCC_x86_64bit_in_usr_bin-Default/devel/lib/qtros/qtros...
/home/piaoqingmei/catkin_ws/src/build-qtros-Desktop_GCC_x86_64bit_in_usr_bin-Default/devel/lib/qtros/qtros exited with code 0