title: how to change the color of a QGraphicsTextItem
body: <p>i have a scene with a multiple (QGraphicsTextItem)s, and  i need to have control over their colors , so how to change a color of a QGraphicsTextItem ? is it possible anyway? i've been trying for 3 days until now . please help</p>
  
  <p><br>
  thanks in advance</p>