title: How to get toggled() signal working with a QPushButton?
body: <p>I have the follwing code where <code>moreButton</code> is a <code>QPushButton</code>. When I toggle the button, nothing happens.</p>
  
  <p>Shouldn't it show or hide <code>secondaryGroupBox</code> and <code>tertiaryGroupBox</code>?</p>
  
  <pre><code>QObject::connect(moreButton, SIGNAL(toggled(bool)), secondaryGroupBox, SLOT(setVisible(bool)));
  QObject::connect(moreButton, SIGNAL(toggled(bool)), tertiaryGroupBox, SLOT(setVisible(bool)));
  </code></pre>