UIEventListener confusion

[derkoi]

I'm trying to figure out how to use the UIEventListener.

Basically my game object needs to listen for a button being pressed down and released. I'm new to events and delegates and previously followed THIS TUTORIAL VIDEO but since converting my UI to NGUI i'm lost in a few places.

Where do i put the event listener? Is it on my game object that I want to react to the button press or is it on it's own game object in the scene?

I was thinking I didn't need the UIEventListener as the script on my game object IS the event listener if I add the code?

Do I need to use UIButtonMessage with UIEventListener or are the 2 separate?

I've confused myself with this now and I'm sure i'm making it a lot more complicated than it needs to be. I thought the eventlistener went on all game objects that were "listening" for events. An event manager was used to send the events & the buttons sent their status to the manager?

[Fbary]

Attach a script with a FunctionA() in it to the gameObjectA.
Attach UIButtonMessage to the gameobjectB.
Set gameObjectA as target of UIButtonMessage, and write "FunctionA" in function name field.

Now gameObjectA will send a message wich will activate that function in gameObjectB.

GameObjectA can be a manager, and every other object can speak with it to activate its functions =)

[ArenMook]

When using UIEventListener you will generally do it from within whatever manager or event handler class you have:

1. UIEventListener.Get(gameObjectToListenTo).onClick += YourClickFunction;

[derkoi]

Thanks, seems to be working with:

1. public void onButtonPressed (GameObject go,bool isDown){
2.                
3.         buttonPressed = true;  
4.                
5.         }

but I want buttonPressed to = false when the button isn't pressed, how can I read the isDown = false?

[ArenMook]

What's OnButtonPressed? NGUI has OnPress, not OnButtonPressed.

[derkoi]

What's OnButtonPressed? NGUI has OnPress, not OnButtonPressed.

OnButtonPressed is my click function that basically checks a box in the inspector so i can see if it's working or not.

But I can get it to only work when the button is held down. How do i read the isDown true and false?

[ArenMook]

1. UIEventListener.Get(gameObjectToListenTo).onPress += YourPressFunction;

[derkoi]

Here's what I have that works, but only on press, not on release. Note that I need 2 buttons that will do the same thing, hence the 2 buttons in the script:

1. public class test : MonoBehaviour {
2.        
3.         public GameObject theButton;
4.         public GameObject the2ndButton;
5.         public bool buttonPressed = false;
6.  
7.         // Use this for initialization
8.         void Start () {
9.  
10.                 UIEventListener.Get(theButton).onPress += onButtonPressed;
11.                 UIEventListener.Get(the2ndButton).onPress += onButtonPressed;
12.         }
13.        
14.        
15.         public void onButtonPressed (GameObject go,bool isDown){
16.                
17.         buttonPressed = true;  
18.                
19.         }
20. }

When the button is pressed buttonPressed = true but when the button is released it doesn't go back to false.

[ArenMook]

... You never check the "isDown" property, how do you expect to know when the button was pressed and when it was released?

Change it to:

1. void onButtonPressed (GameObject sender, bool isDown)
2. {
3.     buttonPressed = isDown;        
4. }

[derkoi]

Thanks! That's what i was asking for.  So obvious now that it's pointed out.  Works a treat!