[Phaser.js] Extended / custom sprites which listens to events

phaserjs-extended-sprite-listen.js

function Lizardman(game, x, y, sprite){
    this.game = game;
    
    Phaser.Sprite.call(this, game, x, y, sprite);
    
    this.game.add.existing(this);
    this.game.physics.enable(this, Phaser.Physics.ARCADE);
    this.anchor.setTo(0.5, 0.5);
}

Lizardman.prototype = Object.create(Phaser.Sprite.prototype);
Lizardman.prototype.constructor = Lizardman;

Lizardman.prototype.update = function(eventSource, callback){
    // will be called in every gamestate.update phase
};

Lizardman.prototype.listen = function(eventSource, callback){
    // as Phaser's Signal.add has so weird signature for me this is a convenience method
    eventSource.add(callback, this);
};

Lizardman.prototype.onEventHappenz = function(event){
    console.log('do something', event);
};