title: Radio button style using icon buttons in flutter
body: <p>I want to create a radio button style voting system using icons in Flutter (Dart) which looks like this:
  <a href="https://i.stack.imgur.com/G5xuf.png" rel="nofollow noreferrer">vote icons</a></p>
  <p>The concept is simple:
  The page will display a movie, the user can then vote on that movie using the Icon buttons above.
  When a vote is made, the icon changes to red and the movie is added to an array.</p>
  <p>The tricky part which I am struggling with is:</p>
  <ol>
  <li>Changing the color of the icon after selected</li>
  <li>Making sure that the other icons remain black</li>
  <li>Changing the other icons back to black if the user selects a different choice</li>
  </ol>
  <p>Thanks in advance!</p>