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📄 adapter.js(123.08 KB)
📄 addblockmodal.js(4.4 KB)
📄 ajax.js(11.97 KB)
📄 aria.js(1011 B)
📄 auto_rows.js(3.46 KB)
📄 autoscroll.js(6.49 KB)
📄 backoff_timer.js(4.98 KB)
📄 chart_axis.js(7.39 KB)
📄 chart_bar.js(3.08 KB)
📄 chart_base.js(11.36 KB)
📄 chart_builder.js(1.65 KB)
📄 chart_line.js(2.08 KB)
📄 chart_output.js(1.08 KB)
📄 chart_output_base.js(2.03 KB)
📄 chart_output_chartjs.js(10.86 KB)
📄 chart_output_htmltable.js(3.3 KB)
📄 chart_pie.js(3.03 KB)
📄 chart_series.js(8.35 KB)
📄 chartjs-lazy.js(488.32 KB)
📄 chartjs.js(913 B)
📄 checkbox-toggleall.js(12.78 KB)
📄 config.js(1002 B)
📄 copy_to_clipboard.js(7.39 KB)
📄 custom_interaction_events.js(22.18 KB)
📁 datafilter
📄 datafilter.js(15.28 KB)
📄 dragdrop.js(12.92 KB)
📄 drawer.js(3.49 KB)
📄 drawer_events.js(967 B)
📄 dynamic_tabs.js(6.68 KB)
📄 edit_switch.js(3.45 KB)
📁 emoji
📄 event.js(3.11 KB)
📄 event_dispatcher.js(2.79 KB)
📄 first.js(1.36 KB)
📄 form-autocomplete.js(51.21 KB)
📄 form-cohort-selector.js(2.46 KB)
📄 form-course-selector.js(3.77 KB)
📄 fragment.js(5.03 KB)
📄 fullscreen.js(1.62 KB)
📄 icon_system.js(2.56 KB)
📄 icon_system_fontawesome.js(4.01 KB)
📄 icon_system_standard.js(2.3 KB)
📄 inplace_editable.js(17.25 KB)
📄 key_codes.js(1.34 KB)
📄 loadingicon.js(3.88 KB)
📁 local
📄 localstorage.js(2.08 KB)
📄 log.js(1.74 KB)
📄 loglevel.js(10.63 KB)
📄 menu_navigation.js(9.2 KB)
📄 modal.js(31.18 KB)
📄 modal_backdrop.js(4.46 KB)
📄 modal_cancel.js(1.49 KB)
📄 modal_copy_to_clipboard.js(3.82 KB)
📄 modal_delete_cancel.js(2.22 KB)
📄 modal_events.js(1.35 KB)
📄 modal_factory.js(8.97 KB)
📄 modal_registry.js(2.38 KB)
📄 modal_save_cancel.js(2.21 KB)
📁 moodlenet
📄 moremenu.js(10.3 KB)
📄 mustache.js(28.75 KB)
📄 network.js(9.66 KB)
📄 normalise.js(1.9 KB)
📄 notification.js(11.8 KB)
📄 page_global.js(5.38 KB)
📄 paged_content.js(2.87 KB)
📄 paged_content_events.js(1.17 KB)
📄 paged_content_factory.js(20.93 KB)
📄 paged_content_pages.js(11.75 KB)
📄 paged_content_paging_bar.js(20.36 KB)
📄 paged_content_paging_bar_limit_selector.js(2.36 KB)
📄 paged_content_paging_dropdown.js(7.36 KB)
📄 pending.js(4.48 KB)
📄 permissionmanager.js(9.77 KB)
📄 popover_region_controller.js(13.04 KB)
📄 popper.js(79.2 KB)
📄 prefetch.js(5.85 KB)
📄 process_monitor.js(3.55 KB)
📄 pubsub.js(2.17 KB)
📄 reactive.js(1.38 KB)
📄 scroll_manager.js(5.5 KB)
📄 sessionstorage.js(2.22 KB)
📄 showhidesettings.js(11.82 KB)
📄 sortable_list.js(29.51 KB)
📄 sticky-footer.js(2.58 KB)
📄 storagewrapper.js(5.21 KB)
📄 str.js(7.84 KB)
📄 tag.js(19.84 KB)
📄 templates.js(51.36 KB)
📄 toast.js(3.32 KB)
📄 tooltip.js(4.09 KB)
📄 tree.js(18.39 KB)
📄 truncate.js(6.56 KB)
📄 url.js(3.65 KB)
📄 user_date.js(9.32 KB)
📄 userfeedback.js(2.91 KB)
📄 usermenu.js(5.13 KB)
📄 utility.js(6.15 KB)
📄 utils.js(2.73 KB)
📄 yui.js(1.13 KB)

Editing: chart_output_chartjs.js

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Chart output for chart.js.
 *
 * @copyright  2016 Frédéric Massart - FMCorz.net
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @module     core/chart_output_chartjs
 */
define([
    'jquery',
    'core/chartjs',
    'core/chart_axis',
    'core/chart_bar',
    'core/chart_output_base',
    'core/chart_line',
    'core/chart_pie',
    'core/chart_series'
], function($, Chartjs, Axis, Bar, Base, Line, Pie, Series) {

/**
     * Makes an axis ID.
     *
     * @param {String} xy Accepts 'x' and 'y'.
     * @param {Number} index The axis index.
     * @return {String}
     */
    var makeAxisId = function(xy, index) {
        return 'axis-' + xy + '-' + index;
    };

/**
     * Chart output for Chart.js.
     *
     * @class
     * @extends {module:core/chart_output_base}
     */
    function Output() {
        Base.prototype.constructor.apply(this, arguments);

// Make sure that we've got a canvas tag.
        this._canvas = this._node;
        if (this._canvas.prop('tagName') != 'CANVAS') {
            this._canvas = $('<canvas>');
            this._node.append(this._canvas);
        }

this._build();
    }
    Output.prototype = Object.create(Base.prototype);

/**
     * Reference to the chart config object.
     *
     * @type {Object}
     * @protected
     */
    Output.prototype._config = null;

/**
     * Reference to the instance of chart.js.
     *
     * @type {Object}
     * @protected
     */
    Output.prototype._chartjs = null;

/**
     * Reference to the canvas node.
     *
     * @type {Jquery}
     * @protected
     */
    Output.prototype._canvas = null;

/**
     * Builds the config and the chart.
     *
     * @protected
     */
    Output.prototype._build = function() {
        this._config = this._makeConfig();
        this._chartjs = new Chartjs(this._canvas[0], this._config);
    };

/**
     * Clean data.
     *
     * @param {(String|String[])} data A single string or an array of strings.
     * @returns {(String|String[])}
     * @protected
     */
    Output.prototype._cleanData = function(data) {
        if (data instanceof Array) {
            return data.map(function(value) {
                return $('<span>').html(value).text();
            });
        } else {
            return $('<span>').html(data).text();
        }
    };

/**
     * Get the chart type and handles the Chart.js specific chart types.
     *
     * By default returns the current chart TYPE value. Also does the handling of specific chart types, for example
     * check if the bar chart should be horizontal and the pie chart should be displayed as a doughnut.
     *
     * @method getChartType
     * @returns {String} the chart type.
     * @protected
     */
    Output.prototype._getChartType = function() {
        var type = this._chart.getType();

// Bars can be displayed vertically and horizontally, defining horizontalBar type.
        if (this._chart.getType() === Bar.prototype.TYPE && this._chart.getHorizontal() === true) {
            type = 'horizontalBar';
        } else if (this._chart.getType() === Pie.prototype.TYPE && this._chart.getDoughnut() === true) {
            // Pie chart can be displayed as doughnut.
            type = 'doughnut';
        }

return type;
    };

/**
     * Make the axis config.
     *
     * @protected
     * @param {module:core/chart_axis} axis The axis.
     * @param {String} xy Accepts 'x' or 'y'.
     * @param {Number} index The axis index.
     * @return {Object} The axis config.
     */
    Output.prototype._makeAxisConfig = function(axis, xy, index) {
        var scaleData = {
            id: makeAxisId(xy, index)
        };

if (axis.getPosition() !== Axis.prototype.POS_DEFAULT) {
            scaleData.position = axis.getPosition();
        }

if (axis.getLabel() !== null) {
            scaleData.title = {
                display: true,
                text: this._cleanData(axis.getLabel())
            };
        }

if (axis.getStepSize() !== null) {
            scaleData.ticks = scaleData.ticks || {};
            scaleData.ticks.stepSize = axis.getStepSize();
        }

if (axis.getMax() !== null) {
            scaleData.ticks = scaleData.ticks || {};
            scaleData.ticks.max = axis.getMax();
        }

if (axis.getMin() !== null) {
            scaleData.ticks = scaleData.ticks || {};
            scaleData.ticks.min = axis.getMin();
        }

return scaleData;
    };

/**
     * Make the config config.
     *
     * @protected
     * @return {Object} The axis config.
     */
    Output.prototype._makeConfig = function() {
        var charType = this._getChartType();
        var config = {
            type: charType,
            data: {
                labels: this._cleanData(this._chart.getLabels()),
                datasets: this._makeDatasetsConfig()
            },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    title: {
                        display: this._chart.getTitle() !== null,
                        text: this._cleanData(this._chart.getTitle())
                    }
                }
            }
        };

if (charType === 'horizontalBar') {
            config.type = 'bar';
            config.options.indexAxis = 'y';
        }

var legendOptions = this._chart.getLegendOptions();
        if (legendOptions) {
            config.options.plugins.legend = legendOptions;
        }

this._chart.getXAxes().forEach(function(axis, i) {
            var axisLabels = axis.getLabels();

config.options.scales = config.options.scales || {};
            config.options.scales.x = config.options.scales.x || {};
            config.options.scales.x[i] = this._makeAxisConfig(axis, 'x', i);

if (axisLabels !== null) {
                config.options.scales.x[i].ticks.callback = function(value, index) {
                    return axisLabels[index] || '';
                };
            }
            config.options.scales.x.stacked = this._isStacked();
        }.bind(this));

this._chart.getYAxes().forEach(function(axis, i) {
            var axisLabels = axis.getLabels();

config.options.scales = config.options.scales || {};
            config.options.scales.y = config.options.scales.yAxes || {};
            config.options.scales.y[i] = this._makeAxisConfig(axis, 'y', i);

if (axisLabels !== null) {
                config.options.scales.y[i].ticks.callback = function(value) {
                    return axisLabels[parseInt(value, 10)] || '';
                };
            }
            config.options.scales.y.stacked = this._isStacked();
        }.bind(this));

config.options.plugins.tooltip = {
            callbacks: {
                label: this._makeTooltip.bind(this)
            }
        };

return config;
    };

/**
     * Get the datasets configurations.
     *
     * @protected
     * @return {Object[]}
     */
    Output.prototype._makeDatasetsConfig = function() {
        var sets = this._chart.getSeries().map(function(series) {
            var colors = series.hasColoredValues() ? series.getColors() : series.getColor();
            var dataset = {
                label: this._cleanData(series.getLabel()),
                data: series.getValues(),
                type: series.getType(),
                fill: series.getFill(),
                backgroundColor: colors,
                // Pie charts look better without borders.
                borderColor: this._chart.getType() == Pie.prototype.TYPE ? '#fff' : colors,
                tension: this._isSmooth(series) ? 0.3 : 0
            };

if (series.getXAxis() !== null) {
                dataset.xAxisID = makeAxisId('x', series.getXAxis());
            }
            if (series.getYAxis() !== null) {
                dataset.yAxisID = makeAxisId('y', series.getYAxis());
            }

return dataset;
        }.bind(this));
        return sets;
    };

/**
     * Get the chart data, add labels and rebuild the tooltip.
     *
     * @param {Object[]} tooltipItem The tooltip item object.
     * @returns {Array}
     * @protected
     */
    Output.prototype._makeTooltip = function(tooltipItem) {

// Get series and chart data to rebuild the tooltip and add labels.
        var series = this._chart.getSeries()[tooltipItem.datasetIndex];
        var serieLabel = series.getLabel();
        var chartData = tooltipItem.dataset.data;
        var tooltipData = chartData[tooltipItem.dataIndex];

// Build default tooltip.
        var tooltip = [];

// Pie and doughnut charts tooltip are different.
        if (this._chart.getType() === Pie.prototype.TYPE) {
            var chartLabels = this._cleanData(this._chart.getLabels());
            tooltip.push(chartLabels[tooltipItem.dataIndex] + ' - ' + this._cleanData(serieLabel) + ': ' + tooltipData);
        } else {
            tooltip.push(this._cleanData(serieLabel) + ': ' + tooltipData);
        }

return tooltip;
    };

/**
     * Verify if the chart line is smooth or not.
     *
     * @protected
     * @param {module:core/chart_series} series The series.
     * @returns {Bool}
     */
    Output.prototype._isSmooth = function(series) {
        var smooth = false;
        if (this._chart.getType() === Line.prototype.TYPE) {
            smooth = series.getSmooth();
            if (smooth === null) {
                smooth = this._chart.getSmooth();
            }
        } else if (series.getType() === Series.prototype.TYPE_LINE) {
            smooth = series.getSmooth();
        }

return smooth;
    };

/**
     * Verify if the bar chart is stacked or not.
     *
     * @protected
     * @returns {Bool}
     */
    Output.prototype._isStacked = function() {
        var stacked = false;

// Stacking is (currently) only supported for bar charts.
        if (this._chart.getType() === Bar.prototype.TYPE) {
            stacked = this._chart.getStacked();
        }

return stacked;
    };

/** @override */
    Output.prototype.update = function() {
        $.extend(true, this._config, this._makeConfig());
        this._chartjs.update();
    };

return Output;

});

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