Blame for dat.gui-master/src/dat/controllers/FunctionController.js

/**
 * dat-gui JavaScript Controller Library
 * https://github.com/dataarts/dat.gui
 *
 * Copyright 2011 Data Arts Team, Google Creative Lab
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 */

import Controller from './Controller';
import dom from '../dom/dom';

/**
 * @class Provides a GUI interface to fire a specified method, a property of an object.
 *
 * @extends dat.controllers.Controller
 *
 * @param {Object} object The object to be manipulated
 * @param {string} property The name of the property to be manipulated
 */
class FunctionController extends Controller {
  constructor(object, property, text) {
    super(object, property);

    const _this = this;

    this.__button = document.createElement('div');
    this.__button.innerHTML = text === undefined ? 'Fire' : text;

    dom.bind(this.__button, 'click', function(e) {
      e.preventDefault();
      _this.fire();
      return false;
    });

    dom.addClass(this.__button, 'button');

    this.domElement.appendChild(this.__button);
  }

  fire() {
    if (this.__onChange) {
      this.__onChange.call(this);
    }
    this.getValue().call(this.object);
    if (this.__onFinishChange) {
      this.__onFinishChange.call(this, this.getValue());
    }
  }
}

export default FunctionController;