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| /** | |
| * 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 common from '../utils/common'; | |
| function numDecimals(x) { | |
| const _x = x.toString(); | |
| if (_x.indexOf('.') > -1) { | |
| return _x.length - _x.indexOf('.') - 1; | |
| } | |
| return 0; | |
| } | |
| /** | |
| * @class Represents a given property of an object that is a number. | |
| * | |
| * @extends dat.controllers.Controller | |
| * | |
| * @param {Object} object The object to be manipulated | |
| * @param {string} property The name of the property to be manipulated | |
| * @param {Object} [params] Optional parameters | |
| * @param {Number} [params.min] Minimum allowed value | |
| * @param {Number} [params.max] Maximum allowed value | |
| * @param {Number} [params.step] Increment by which to change value | |
| */ | |
| class NumberController extends Controller { | |
| constructor(object, property, params) { | |
| super(object, property); | |
| const _params = params || {}; | |
| this.__min = _params.min; | |
| this.__max = _params.max; | |
| this.__step = _params.step; | |
| if (common.isUndefined(this.__step)) { | |
| if (this.initialValue === 0) { | |
| this.__impliedStep = 1; // What are we, psychics? | |
| } else { | |
| // Hey Doug, check this out. | |
| this.__impliedStep = Math.pow(10, Math.floor(Math.log(Math.abs(this.initialValue)) / Math.LN10)) / 10; | |
| } | |
| } else { | |
| this.__impliedStep = this.__step; | |
| } | |
| this.__precision = numDecimals(this.__impliedStep); | |
| } | |
| setValue(v) { | |
| let _v = v; | |
| if (this.__min !== undefined && _v < this.__min) { | |
| _v = this.__min; | |
| } else if (this.__max !== undefined && _v > this.__max) { | |
| _v = this.__max; | |
| } | |
| if (this.__step !== undefined && _v % this.__step !== 0) { | |
| _v = Math.round(_v / this.__step) * this.__step; | |
| } | |
| return super.setValue(_v); | |
| } | |
| /** | |
| * Specify a minimum value for <code>object[property]</code>. | |
| * | |
| * @param {Number} minValue The minimum value for | |
| * <code>object[property]</code> | |
| * @returns {dat.controllers.NumberController} this | |
| */ | |
| min(minValue) { | |
| this.__min = minValue; | |
| return this; | |
| } | |
| /** | |
| * Specify a maximum value for <code>object[property]</code>. | |
| * | |
| * @param {Number} maxValue The maximum value for | |
| * <code>object[property]</code> | |
| * @returns {dat.controllers.NumberController} this | |
| */ | |
| max(maxValue) { | |
| this.__max = maxValue; | |
| return this; | |
| } | |
| /** | |
| * Specify a step value that dat.controllers.NumberController | |
| * increments by. | |
| * | |
| * @param {Number} stepValue The step value for | |
| * dat.controllers.NumberController | |
| * @default if minimum and maximum specified increment is 1% of the | |
| * difference otherwise stepValue is 1 | |
| * @returns {dat.controllers.NumberController} this | |
| */ | |
| step(stepValue) { | |
| this.__step = stepValue; | |
| this.__impliedStep = stepValue; | |
| this.__precision = numDecimals(stepValue); | |
| return this; | |
| } | |
| } | |
| export default NumberController; | |