dat.gui/src/controllers/function.js

GUI.FunctionController = function() {
    
    this.type = "function";
    
    var _this = this;
    
    GUI.Controller.apply(this, arguments);
    
    this.domElement.addEventListener('click', function() {
        _this.fire();
    }, false);
    
    this.domElement.style.cursor = "pointer";
    this.propertyNameElement.style.cursor = "pointer";
    
    var fireFunction = null;
    this.onFire = function(fnc) {
        fireFunction = fnc;
        return this;
    }
    
    this.fire = function() {
        if (fireFunction != null) {
            fireFunction.call(this);
        }
        _this.object[_this.propertyName].call(_this.object);
    };
};
GUI.extendController(GUI.FunctionController);