rocket_listenable

Description:

rocket listenable

Rocket Listenable #
A package that provides a mix-in RocketListenable class for implementing listenable objects in Dart.
A listenable object allows other objects to register and unregister listeners and can notify its listeners when a change occurs.
Usage #
To use the RocketListenable class, simply extend your class with it and call the registerListener method to register a listener. Call the callListener method to notify the listeners that a change has occurred.
import 'package:rocket_listenable/rocket_listenable.dart';

class MyModel with RocketListenable {
String _data = '';

String get data => _data;

set data(String value) {
_data = value;
callListener('data');
}
}

final myModel = MyModel();

myModel.registerListener('data', () {
print('Data changed: ${myModel.data}');
});

myModel.data = 'Hello, world!';
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Methods #
registerListener(String key, VoidCallback listener) #
Registers a new listener with the specified key.
registerListeners(Map<String, List<VoidCallback>> listeners) #
Registers multiple listeners with the specified keys.
callListener(String key) #
Notifies the listeners registered with the specified key.
callListeners(List<String> keys) #
Notifies the listeners registered with any of the specified keys.
removeListener(String key, [VoidCallback? listener]) #
Removes the specified listener (or all listeners if no listener is specified) with the specified key.
removeListeners(List<String> keys, [List<VoidCallback>? listeners]) #
Removes the specified listeners (or all listeners if no listener is specified) with the specified keys.
hasListeners #
Returns true if this object has any listeners.
keyHasListeners(String key) #
Returns true if a listener is registered with the specified key.
getListenersKeys #
Returns a list of all keys that have registered listeners.
dispose() #
Disposes of this object and removes all listeners.