149 lines
4.0 KiB
JavaScript
149 lines
4.0 KiB
JavaScript
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var zrUtil = require("zrender/lib/core/util");
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var Scale = require("./Scale");
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var OrdinalMeta = require("../data/OrdinalMeta");
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* Linear continuous scale
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* @module echarts/coord/scale/Ordinal
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*
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* http://en.wikipedia.org/wiki/Level_of_measurement
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*/
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// FIXME only one data
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var scaleProto = Scale.prototype;
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var OrdinalScale = Scale.extend({
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type: 'ordinal',
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/**
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* @param {module:echarts/data/OrdianlMeta|Array.<string>} ordinalMeta
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*/
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init: function (ordinalMeta, extent) {
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// Caution: Should not use instanceof, consider ec-extensions using
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// import approach to get OrdinalMeta class.
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if (!ordinalMeta || zrUtil.isArray(ordinalMeta)) {
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ordinalMeta = new OrdinalMeta({
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categories: ordinalMeta
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});
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}
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this._ordinalMeta = ordinalMeta;
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this._extent = extent || [0, ordinalMeta.categories.length - 1];
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},
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parse: function (val) {
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return typeof val === 'string' ? this._ordinalMeta.getOrdinal(val) // val might be float.
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: Math.round(val);
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},
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contain: function (rank) {
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rank = this.parse(rank);
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return scaleProto.contain.call(this, rank) && this._ordinalMeta.categories[rank] != null;
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},
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/**
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* Normalize given rank or name to linear [0, 1]
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* @param {number|string} [val]
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* @return {number}
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*/
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normalize: function (val) {
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return scaleProto.normalize.call(this, this.parse(val));
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},
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scale: function (val) {
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return Math.round(scaleProto.scale.call(this, val));
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},
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/**
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* @return {Array}
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*/
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getTicks: function () {
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var ticks = [];
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var extent = this._extent;
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var rank = extent[0];
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while (rank <= extent[1]) {
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ticks.push(rank);
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rank++;
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}
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return ticks;
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},
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/**
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* Get item on rank n
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* @param {number} n
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* @return {string}
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*/
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getLabel: function (n) {
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if (!this.isBlank()) {
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// Note that if no data, ordinalMeta.categories is an empty array.
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return this._ordinalMeta.categories[n];
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}
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},
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/**
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* @return {number}
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*/
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count: function () {
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return this._extent[1] - this._extent[0] + 1;
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},
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/**
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* @override
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*/
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unionExtentFromData: function (data, dim) {
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this.unionExtent(data.getApproximateExtent(dim));
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},
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getOrdinalMeta: function () {
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return this._ordinalMeta;
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},
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niceTicks: zrUtil.noop,
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niceExtent: zrUtil.noop
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});
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/**
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* @return {module:echarts/scale/Time}
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*/
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OrdinalScale.create = function () {
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return new OrdinalScale();
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};
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var _default = OrdinalScale;
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module.exports = _default; |