title: PyQt - QFileDialog selects with single click
body: <p>I have this very strange problem. I use <code>QFileDialog</code> to select files, but the selection is done with a <strong>single click</strong>, instead of double click as in everywhere else. Maybe something specific for the <em>look-and-feel</em>, or something in the configuration.</p>
  
  <p>My form (single click):</p>
  
  <p><a href="https://i.stack.imgur.com/tbDrU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tbDrU.png" alt="enter image description here"></a></p>
  
  <p>Eclipse form (double click):</p>
  
  <p><a href="https://i.stack.imgur.com/wWpE0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wWpE0.png" alt="enter image description here"></a></p>
  
  <p>Any idea how to set it to double-click? Thanks.</p>