title: When exactly are Qt Quick items repainted?
body: <p>When exactly are Qt Quick items repainted? I.e. on which events?</p>
  
  <p>For example, if I have overlapping items A and B, and I change a property of A, will B get repainted as well? If not, how can it work?</p>
  
  <p>What if they are non-overlapping?</p>