195 lines
3.9 KiB
JavaScript
195 lines
3.9 KiB
JavaScript
var mix = require('@antv/util/lib/mix');
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var each = require('@antv/util/lib/each');
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var isObject = require('@antv/util/lib/type/is-object');
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var isNil = require('@antv/util/lib/type/is-nil');
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var Scale = /*#__PURE__*/function () {
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var _proto = Scale.prototype;
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_proto._initDefaultCfg = function _initDefaultCfg() {
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this.type = 'base';
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/**
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* 格式化函数,输出文本或者tick时的格式化函数
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* @type {Function}
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*/
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this.formatter = null;
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/**
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* 输出的值域
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* @type {Array}
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*/
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this.range = [0, 1];
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/**
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* 度量的标记
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* @type {Array}
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*/
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this.ticks = null;
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/**
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* 参与度量计算的值，可选项
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* @type {Array}
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*/
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this.values = [];
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};
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function Scale(cfg) {
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this._initDefaultCfg();
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mix(this, cfg);
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this.init();
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}
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/**
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* 度量初始化
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* @protected
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*/
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_proto.init = function init() {}
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/**
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* 获取该度量的ticks,返回的是多个对象，
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* - text: tick 的文本
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* - value: 对应的度量转换后的值
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* <code>
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* [
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* {text: 0,value:0}
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* {text: 1,value:0.2}
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* {text: 2,value:0.4}
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* {text: 3,value:0.6}
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* {text: 4,value:0.8}
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* {text: 5,value:1}
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* ]
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* </code>
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* @param {Number} count 输出tick的个数的近似值，默认是 10
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* @return {Array} 返回 ticks 数组
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*/
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;
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_proto.getTicks = function getTicks() {
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var self = this;
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var ticks = self.ticks;
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var rst = [];
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each(ticks, function (tick) {
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var obj;
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if (isObject(tick)) {
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obj = tick;
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} else {
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obj = {
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text: self.getText(tick),
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tickValue: tick,
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value: self.scale(tick)
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};
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}
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rst.push(obj);
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});
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return rst;
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}
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/**
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* 获取格式化后的文本
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* @param {*} value 输入的数据
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* @param {*} key 字段的 key
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* @return {String} 格式化的文本
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*/
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;
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_proto.getText = function getText(value, key) {
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var formatter = this.formatter;
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value = formatter ? formatter(value, key) : value;
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if (isNil(value) || !value.toString) {
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value = '';
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}
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return value.toString();
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}
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/**
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* 输出的值域最小值
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* @protected
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* @return {Number} 返回最小的值
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*/
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;
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_proto.rangeMin = function rangeMin() {
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return this.range[0];
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}
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/**
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* 输出的值域最大值
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* @protected
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* @return {Number} 返回最大的值
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*/
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;
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_proto.rangeMax = function rangeMax() {
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var range = this.range;
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return range[range.length - 1];
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}
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/**
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* 度量转换后的结果，翻转回输入域
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* @param {Number} value 需要翻转的数值
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* @return {*} 度量的输入值
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*/
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;
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_proto.invert = function invert(value) {
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return value;
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}
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/**
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* 将传入的值从非数值转换成数值格式，如分类字符串、时间字符串等
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* @param {*} value 传入的值
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* @return {Number} 转换的值
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*/
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;
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_proto.translate = function translate(value) {
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return value;
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}
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/**
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* 进行度量转换
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* @param {*} value 输入值
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* @return {Number} 输出值，在设定的输出值域之间，默认[0,1]
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*/
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;
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_proto.scale = function scale(value) {
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return value;
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}
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/**
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* 克隆一个新的scale,拥有跟当前scale相同的输入域、输出域等
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* @return {Scale} 克隆的度量
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*/
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;
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_proto.clone = function clone() {
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var self = this;
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var constr = self.constructor;
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var cfg = {};
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each(self, function (v, k) {
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cfg[k] = self[k];
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});
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return new constr(cfg);
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}
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/**
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* 更改度量的属性信息
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* @param {Object} info 属性信息
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* @chainable
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* @return {Scale} 返回自身的引用
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*/
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;
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_proto.change = function change(info) {
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this.ticks = null;
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mix(this, info);
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this.init();
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return this;
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};
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return Scale;
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}();
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module.exports = Scale; |