title: How to higlight button color when hover the mouse after a click?
body: <p>I'm doing a piano application thought to be played on mobile devices (Android). All the piano keys are UI buttons that have the "property" pressed color to a grey one in order to properly indicate when a piano key is emiting sound.<br>
  My current problem is that when I first click on a key and after that I drag the mouse over the following keys, only the first one that I clicked is getting the change of color (the idea is that the change of color duration finishes when other key starts sound and then the new key where I pass the mouse-finger gets the grey color).<br>
  I also tryied setting the higlighted color property to the same color as the pressed color with the Navigation parameter to none (if it's set to automatic it happens some kind of bug that the color is getting "stuck" until I make sound another key), but the result it's still the same.  </p>
  
  <p><strong>EDIT:</strong><br>
  I update the issue with some progress thath I made:<br>
  I'm trying to change the pressed color with a script thanks to the events Pointer enter and exit (both events are placed on a Event trigger in every button).<br>
  Code:</p>
  
  <pre><code>public class ChangeKeyColor : MonoBehaviour{
  
      public Button button;
  
      void Start()
      {
  
      }
  
      void Update()
      {
  
      }
  
      public void EnterKey () {
          Debug.Log("Enter the key");
          ColorBlock colors = button.colors;
          colors.normalColor = new Color(179, 179, 179, 255);
          //colors.highlightedColor = new Color32(179, 179, 179, 255);
          button.colors = colors;
      }
  
      public void ExitKey()
      {
          Debug.Log("Exits the key");
          ColorBlock colors = button.colors;
          colors.normalColor = Color.white;
          //colors.highlightedColor = new Color32(255, 255, 255, 255);
          //colors.pressedColor = Color.white;
          button.colors = colors;
      }
  
  }
  </code></pre>
  
  <p>The only improvement that I obtained is that now when I'm dragging the mouse (maintaning it) the first button returns to white color, but I think that this is happening because now I only setted to gray color the pressed color option...<br>
  Does anyone know why the pressed color change that I'm making in the script isn't happening? When I drag the mouse to another key isn't considered as a pressed button?</p>
  
  <p>Regards!</p>