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Viewing file:     Cartesian.js (3.06 KB)      -rw-r--r--

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

/**
 * Cartesian coordinate system
 * @module  echarts/coord/Cartesian
 *
 */

import * as zrUtil from 'zrender/src/core/util';

function dimAxisMapper(dim) {
    return this._axes[dim];
}

/**
 * @alias module:echarts/coord/Cartesian
 * @constructor
 */
var Cartesian = function (name) {
    this._axes = {};

    this._dimList = [];

    /**
     * @type {string}
     */
    this.name = name || '';
};

Cartesian.prototype = {

    constructor: Cartesian,

    type: 'cartesian',

    /**
     * Get axis
     * @param  {number|string} dim
     * @return {module:echarts/coord/Cartesian~Axis}
     */
    getAxis: function (dim) {
        return this._axes[dim];
    },

    /**
     * Get axes list
     * @return {Array.<module:echarts/coord/Cartesian~Axis>}
     */
    getAxes: function () {
        return zrUtil.map(this._dimList, dimAxisMapper, this);
    },

    /**
     * Get axes list by given scale type
     */
    getAxesByScale: function (scaleType) {
        scaleType = scaleType.toLowerCase();
        return zrUtil.filter(
            this.getAxes(),
            function (axis) {
                return axis.scale.type === scaleType;
            }
        );
    },

    /**
     * Add axis
     * @param {module:echarts/coord/Cartesian.Axis}
     */
    addAxis: function (axis) {
        var dim = axis.dim;

        this._axes[dim] = axis;

        this._dimList.push(dim);
    },

    /**
     * Convert data to coord in nd space
     * @param {Array.<number>|Object.<string, number>} val
     * @return {Array.<number>|Object.<string, number>}
     */
    dataToCoord: function (val) {
        return this._dataCoordConvert(val, 'dataToCoord');
    },

    /**
     * Convert coord in nd space to data
     * @param  {Array.<number>|Object.<string, number>} val
     * @return {Array.<number>|Object.<string, number>}
     */
    coordToData: function (val) {
        return this._dataCoordConvert(val, 'coordToData');
    },

    _dataCoordConvert: function (input, method) {
        var dimList = this._dimList;

        var output = input instanceof Array ? [] : {};

        for (var i = 0; i < dimList.length; i++) {
            var dim = dimList[i];
            var axis = this._axes[dim];

            output[dim] = axis[method](input[dim]);
        }

        return output;
    }
};

export default Cartesian;