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This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Chart base.\n *\n * @package core\n * @copyright 2016 Frédéric Massart - FMCorz.net\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n * @module core/chart_base\n */\ndefine(['core/chart_series', 'core/chart_axis'], function(Series, Axis) {\n\n /**\n * Chart base.\n *\n * The constructor of a chart must never take any argument.\n *\n * {@link module:core/chart_base#_setDefault} to set the defaults on instantiation.\n *\n * @alias module:core/chart_base\n * @class\n */\n function Base() {\n this._series = [];\n this._labels = [];\n this._xaxes = [];\n this._yaxes = [];\n\n this._setDefaults();\n }\n\n /**\n * The series constituting this chart.\n *\n * @protected\n * @type {module:core/chart_series[]}\n */\n Base.prototype._series = null;\n\n /**\n * The labels of the X axis when categorised.\n *\n * @protected\n * @type {String[]}\n */\n Base.prototype._labels = null;\n\n /**\n * Options for chart legend display.\n *\n * @protected\n * @type {Object}\n */\n Base.prototype._legendOptions = null;\n\n /**\n * The title of the chart.\n *\n * @protected\n * @type {String}\n */\n Base.prototype._title = null;\n\n /**\n * The X axes.\n *\n * @protected\n * @type {module:core/chart_axis[]}\n */\n Base.prototype._xaxes = null;\n\n /**\n * The Y axes.\n *\n * @protected\n * @type {module:core/chart_axis[]}\n */\n Base.prototype._yaxes = null;\n\n /**\n * Colours to pick from when automatically assigning them.\n *\n * @const\n * @type {String[]}\n */\n Base.prototype.COLORSET = ['#f3c300', '#875692', '#f38400', '#a1caf1', '#be0032', '#c2b280', '#7f180d', '#008856',\n '#e68fac', '#0067a5'];\n\n /**\n * Set of colours defined by setting $CFG->chart_colorset to be picked when automatically assigning them.\n *\n * @type {String[]}\n * @protected\n */\n Base.prototype._configColorSet = null;\n\n /**\n * The type of chart.\n *\n * @abstract\n * @type {String}\n * @const\n */\n Base.prototype.TYPE = null;\n\n /**\n * Add a series to the chart.\n *\n * This will automatically assign a color to the series if it does not have one.\n *\n * @param {module:core/chart_series} series The series to add.\n */\n Base.prototype.addSeries = function(series) {\n this._validateSeries(series);\n this._series.push(series);\n\n // Give a default color from the set.\n if (series.getColor() === null) {\n var configColorSet = this.getConfigColorSet() || Base.prototype.COLORSET;\n series.setColor(configColorSet[this._series.length % configColorSet.length]);\n }\n };\n\n /**\n * Create a new instance of a chart from serialised data.\n *\n * the serialised attributes they offer and support.\n *\n * @static\n * @method create\n * @param {module:core/chart_base} Klass The class oject representing the type of chart to instantiate.\n * @param {Object} data The data of the chart.\n * @return {module:core/chart_base}\n */\n Base.prototype.create = function(Klass, data) {\n // TODO Not convinced about the usage of Klass here but I can't figure out a way\n // to have a reference to the class in the sub classes, in PHP I'd do new self().\n var Chart = new Klass();\n Chart.setConfigColorSet(data.config_colorset);\n Chart.setLabels(data.labels);\n Chart.setTitle(data.title);\n if (data.legend_options) {\n Chart.setLegendOptions(data.legend_options);\n }\n data.series.forEach(function(seriesData) {\n Chart.addSeries(Series.prototype.create(seriesData));\n });\n data.axes.x.forEach(function(axisData, i) {\n Chart.setXAxis(Axis.prototype.create(axisData), i);\n });\n data.axes.y.forEach(function(axisData, i) {\n Chart.setYAxis(Axis.prototype.create(axisData), i);\n });\n return Chart;\n };\n\n /**\n * Get an axis.\n *\n * @private\n * @param {String} xy Accepts the values 'x' or 'y'.\n * @param {Number} [index=0] The index of the axis of its type.\n * @param {Bool} [createIfNotExists=false] When true, create an instance if it does not exist.\n * @return {module:core/chart_axis}\n */\n Base.prototype.__getAxis = function(xy, index, createIfNotExists) {\n var axes = xy === 'x' ? this._xaxes : this._yaxes,\n setAxis = (xy === 'x' ? this.setXAxis : this.setYAxis).bind(this),\n axis;\n\n index = typeof index === 'undefined' ? 0 : index;\n createIfNotExists = typeof createIfNotExists === 'undefined' ? false : createIfNotExists;\n axis = axes[index];\n\n if (typeof axis === 'undefined') {\n if (!createIfNotExists) {\n throw new Error('Unknown axis.');\n }\n axis = new Axis();\n setAxis(axis, index);\n }\n\n return axis;\n };\n\n /**\n * Get colours defined by setting.\n *\n * @return {String[]}\n */\n Base.prototype.getConfigColorSet = function() {\n return this._configColorSet;\n };\n\n /**\n * Get the labels of the X axis.\n *\n * @return {String[]}\n */\n Base.prototype.getLabels = function() {\n return this._labels;\n };\n\n /**\n * Get whether to display the chart legend.\n *\n * @return {Bool}\n */\n Base.prototype.getLegendOptions = function() {\n return this._legendOptions;\n };\n\n /**\n * Get the series.\n *\n * @return {module:core/chart_series[]}\n */\n Base.prototype.getSeries = function() {\n return this._series;\n };\n\n /**\n * Get the title of the chart.\n *\n * @return {String}\n */\n Base.prototype.getTitle = function() {\n return this._title;\n };\n\n /**\n * Get the type of chart.\n *\n * @see module:core/chart_base#TYPE\n * @return {String}\n */\n Base.prototype.getType = function() {\n if (!this.TYPE) {\n throw new Error('The TYPE property has not been set.');\n }\n return this.TYPE;\n };\n\n /**\n * Get the X axes.\n *\n * @return {module:core/chart_axis[]}\n */\n Base.prototype.getXAxes = function() {\n return this._xaxes;\n };\n\n /**\n * Get an X axis.\n *\n * @param {Number} [index=0] The index of the axis.\n * @param {Bool} [createIfNotExists=false] Create the instance of it does not exist at index.\n * @return {module:core/chart_axis}\n */\n Base.prototype.getXAxis = function(index, createIfNotExists) {\n return this.__getAxis('x', index, createIfNotExists);\n };\n\n /**\n * Get the Y axes.\n *\n * @return {module:core/chart_axis[]}\n */\n Base.prototype.getYAxes = function() {\n return this._yaxes;\n };\n\n /**\n * Get an Y axis.\n *\n * @param {Number} [index=0] The index of the axis.\n * @param {Bool} [createIfNotExists=false] Create the instance of it does not exist at index.\n * @return {module:core/chart_axis}\n */\n Base.prototype.getYAxis = function(index, createIfNotExists) {\n return this.__getAxis('y', index, createIfNotExists);\n };\n\n /**\n * Set colours defined by setting.\n *\n * @param {String[]} colorset An array of css colours.\n * @protected\n */\n Base.prototype.setConfigColorSet = function(colorset) {\n this._configColorSet = colorset;\n };\n\n /**\n * Set the defaults for this chart type.\n *\n * Child classes can extend this to set defaults values on instantiation.\n *\n * emphasize and self-document the defaults values set by the chart type.\n *\n * @protected\n */\n Base.prototype._setDefaults = function() {\n // For the children to extend.\n };\n\n /**\n * Set the labels of the X axis.\n *\n * This requires for each series to contain strictly as many values as there\n * are labels.\n *\n * @param {String[]} labels The labels.\n */\n Base.prototype.setLabels = function(labels) {\n if (labels.length && this._series.length && this._series[0].length != labels.length) {\n throw new Error('Series must match label values.');\n }\n this._labels = labels;\n };\n\n /**\n * Set options for chart legend display.\n *\n * @param {Object} legendOptions\n */\n Base.prototype.setLegendOptions = function(legendOptions) {\n if (typeof legendOptions !== 'object') {\n throw new Error('Setting legend with non-object value:' + legendOptions);\n }\n this._legendOptions = legendOptions;\n };\n\n /**\n * Set the title of the chart.\n *\n * @param {String} title The title.\n */\n Base.prototype.setTitle = function(title) {\n this._title = title;\n };\n\n /**\n * Set an X axis.\n *\n * Note that this will override any predefined axis without warning.\n *\n * @param {module:core/chart_axis} axis The axis.\n * @param {Number} [index=0] The index of the axis.\n */\n Base.prototype.setXAxis = function(axis, index) {\n index = typeof index === 'undefined' ? 0 : index;\n this._validateAxis('x', axis, index);\n this._xaxes[index] = axis;\n };\n\n /**\n * Set a Y axis.\n *\n * Note that this will override any predefined axis without warning.\n *\n * @param {module:core/chart_axis} axis The axis.\n * @param {Number} [index=0] The index of the axis.\n */\n Base.prototype.setYAxis = function(axis, index) {\n index = typeof index === 'undefined' ? 0 : index;\n this._validateAxis('y', axis, index);\n this._yaxes[index] = axis;\n };\n\n /**\n * Validate an axis.\n *\n * @protected\n * @param {String} xy X or Y axis.\n * @param {module:core/chart_axis} axis The axis to validate.\n * @param {Number} [index=0] The index of the axis.\n */\n Base.prototype._validateAxis = function(xy, axis, index) {\n index = typeof index === 'undefined' ? 0 : index;\n if (index > 0) {\n var axes = xy == 'x' ? this._xaxes : this._yaxes;\n if (typeof axes[index - 1] === 'undefined') {\n throw new Error('Missing ' + xy + ' axis at index lower than ' + index);\n }\n }\n };\n\n /**\n * Validate a series.\n *\n * @protected\n * @param {module:core/chart_series} series The series to validate.\n */\n Base.prototype._validateSeries = function(series) {\n if (this._series.length && this._series[0].getCount() != series.getCount()) {\n throw new Error('Series do not have an equal number of values.');\n\n } else if (this._labels.length && this._labels.length != series.getCount()) {\n throw new Error('Series must match label values.');\n }\n };\n\n return Base;\n\n});\n"],"file":"chart_base.min.js"}