title: Binding to element in WPF: can the Path expression do math?
body: <p>I'm trying to bind a control to the parent's Height/width property using <code>ElementName</code> and a Path. However, I don't want to bind to the actual height, but to exactly half the height.
  Can the <code>Path</code> expression do the math?</p>
  
  <p>e.g. <code>Path={ActualHeight/2}</code></p>
  
  <p>I couldn't find a way to do that. IS there any other clever approach?</p>
  
  <p>Thanks!</p>