How can I use a delegate/event with enums and switch statement to switch powerup?

Question

So this sits on my powerup and I want to transform it depending on what button is clicked. How can I pass info what button was clicked so the case is switched?

 public enum PowerUps
     {
         ARROW,
         REVERSE,
         THIRD
     }
     public PowerUps ActivePowerUp = PowerUps.ARROW;
 
 
     void Start()
     {
         GameManager.onClick += TransformPowerUp;
 }
 
 
     public void TransformPowerUp()
     {
 
         switch (ActivePowerUp)
         {
             case PowerUps.ARROW:
                 Debug.Log("ARROW");
                 break;
             case PowerUps.REVERSE:
                 Debug.Log("REVERSE");
                 break;
             case PowerUps.THIRD:
                 Debug.Log("THIRD");
                 break;
             default:
                 Debug.Log("NOTHING");
                 break;
         }

For the buttons I have the following in my gamemanager script

  public delegate void ActionClick();
     public static event ActionClick onClick;
 
 
     public void ButtonClick()
     {
         //Checks if there are any listeners
         if (onClick != null)
             onClick();
 
     }

Answer 1

Answer by Larry-Dietz · Dec 09, 2019 at 05:55 PM

In your GameManager script, where you are defining the onClick event, you should be able to make that event use a parameter, to pass the correct powerup to the script. Something like this...

  public delegate void onCliick(PowerUps SelectedPowerUp);
     public static event onClickHandler onClick;
     public static void onClick(PowerUps SelectedPowerUp)
     {
         if (onClick != null)
             onClick(SelectedPowerUp);
     }

I just wrote this directly in the code window, so no guarantees against typos :)

Then in your button event, just pass the correct PowerUp to the OnClick event.

You would also need to change the declaration of TransformPowerUp to accept the parameter, like this...

  public void TransformPowerUp(PowerUp ActivePowerUp)

Hope this helps, -Larry

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Trabahoo · Dec 09, 2019 at 06:07 PM 0

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Hi @Larry-Dietz

There are three buttons and they all use the ButtonClick function. It doesn't seem to work. I want the gameObject to transform based on the case, using enums. I tried adapting what you gave me, but it's not working.

 public delegate void onClick(PowerUps ActivePowerUp);
     public static event ActionClick onClick;
 
 
     public void ButtonClick(PowerUps ActivePowerUp)
     {
         //Checks if there are any listeners
         if (onClick != null)
             onClick();
 
     }

AND:

  public enum PowerUps
       {
           ARROW,
           REVERSE,
           THIRD
       }
       public PowerUps ActivePowerUp = PowerUps.ARROW;
 
 
 
 
       void Start()
       {
           Game$$anonymous$$anager.onClick += TransformPowerUp;
   }
 
 
     public void TransformPowerUp(PowerUps ActivePowerUp)
       {
 
           switch (ActivePowerUp)
           {
               case PowerUps.ARROW:
                   Debug.Log("ARROW");
                   break;
               case PowerUps.REVERSE:
                   Debug.Log("REVERSE");
                   break;
               case PowerUps.THIRD:
                   Debug.Log("THIRD");
                   break;
               default:
                   Debug.Log("NOTHING");
                   break;
           }

Larry-Dietz Trabahoo · Dec 09, 2019 at 06:40 PM 0

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Try making the following change...

  public void ButtonClick(PowerUps ActivePowerUp)
      {
          //Checks if there are any listeners
          if (onClick != null)
              onClick(ActivePowerUp);
  
      }

How can I use a delegate/event with enums and switch statement to switch powerup?

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