title: QGridLayout with different size of cells
body: <p>I'm trying to set a QGridLayout with four widget as in the image below: <img src="https://i.stack.imgur.com/GH9eb.png" alt="Goal"></p>
  
  <p>however what I've managed with QGridLayout as of now is: <img src="https://i.stack.imgur.com/dFpWP.png" alt="Current situation"></p>
  
  <p>I don't see how I can set the size of the row different for column 0 and 1. Maybe QGridLayout is not the right way of doing it but I don't know of any other widget that would do the trick. 
  Does anyone have any idea how to achieve this?</p>