title: PySide Frame doesn't appear on Grid Layout
body: <p>I'm trying to add a simple square to a grid layout, but it doesn't seem to work.</p>
  
  <p>Here is the code:</p>
  
  <pre><code>self.resultFrame = QFrame()
  self.resultFrame.setGeometry(100, 200, 0, 0)
  self.resultFrame.setStyleSheet("QWidget { background-color: #000 }")
  
  gridLayout.addWidget(self.resultFrame, 0, 0, 1, 4)
  </code></pre>
  
  <p>If I switch <code>self.resultFrame</code> to, for example, a <code>QLabel</code> or a <code>QPushButton</code>, it seems to work fine, but not with <code>QFrame</code>.</p>
  
  <p>What could I be doing wrong?</p>