title: A newbie question in Qt
body: <pre><code>MainWindow::MainWindow(QWidget *parent) :  
      QMainWindow(parent),  
      ui(new Ui::MainWindow)  
  {  
      ui-&gt;setupUi(this);  
  }
  </code></pre>
  
  <p>In this section of code,  after <code>:</code> what does  </p>
  
  <pre><code>QMainWindow(parent),
  ui(new Ui::MainWindow)  
  </code></pre>
  
  <p>mean?</p>