title: How to position controls relative to one central control?
body: <p><a href="https://i.stack.imgur.com/KaAyv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KaAyv.png" alt="enter image description here"></a>
  This is what the final windows should look like. The blue box should represent an user control (for multiple use) which is added to the main window. The red circle represents the central control and the other blue circles are controls which should be positioned relative to the red one (i.e. the yellow center point).</p>
  
  <p>I tried using a grid but faced the problem that I cannot overlap the cells such that the blue circle overlaps with the red one. I think it is possible to solve this somehow with a canvas and absolute positioning but then scaling might be the problem.</p>
  
  <p>Do you know a better way of achieving this?</p>