https://github.com/scijava/scijava-listeners

https://github.com/scijava/scijava-listeners

Last synced: 10 months ago
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• Host: GitHub
• URL: https://github.com/scijava/scijava-listeners
• Owner: scijava
• Created: 2019-01-26T12:36:59.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2025-01-29T20:32:53.000Z (12 months ago)
• Last Synced: 2025-01-29T21:26:41.524Z (12 months ago)
• Language: Java
• Size: 40 KB
• Stars: 1
• Watchers: 7
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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# scijava-listeners

Helper class for maintaining lists of listeners.

Usage example:

```java

public interface MyListener

{

    void somethingChanged();

}

public class Listenable

{

    // Create a variant of Listeners.List

    private final Listeners.List< MyListener > listeners = new Listeners.SynchronizedList<>();

    // Use Listeners.List.list to call registered listeners

    private void notifyListeners() {

        listeners.list.forEach( MyListener::somethingChanged );

    }

    // expose only Listeners (not Listeners.List) to allow un/registering listeners

    public Listeners< MyListener > myListeners() {

        return listeners;

    }

}

public class Listening

{

    public Listening( Listenable l ) {

        l.myListeners().add( this::notifyMe );

    }

    void notifyMe() {

        System.out.println( "something changed!");

    }

}

```