/**
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* @license Highcharts JS v3.0.6 (2013-10-04)
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* Plugin for displaying a message when there is no data visible in chart.
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*
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* (c) 2010-2013 Highsoft AS
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* Author: Øystein Moseng
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*
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* License: www.highcharts.com/license
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*/
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(function (H) { // docs
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var seriesTypes = H.seriesTypes,
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chartPrototype = H.Chart.prototype,
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defaultOptions = H.getOptions(),
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extend = H.extend;
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// Add language option
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extend(defaultOptions.lang, {
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noData: 'No data to display'
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});
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// Add default display options for message
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defaultOptions.noData = {
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position: {
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x: 0,
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y: 0,
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align: 'center',
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verticalAlign: 'middle'
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},
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attr: {
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},
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style: {
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fontWeight: 'bold',
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fontSize: '12px',
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color: '#60606a'
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}
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};
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/**
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* Define hasData functions for series. These return true if there are data points on this series within the plot area
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*/
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function hasDataPie() {
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return !!this.points.length; /* != 0 */
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}
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seriesTypes.pie.prototype.hasData = hasDataPie;
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if (seriesTypes.gauge) {
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seriesTypes.gauge.prototype.hasData = hasDataPie;
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}
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if (seriesTypes.waterfall) {
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seriesTypes.waterfall.prototype.hasData = hasDataPie;
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}
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H.Series.prototype.hasData = function () {
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return this.dataMax !== undefined && this.dataMin !== undefined;
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};
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/**
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* Display a no-data message.
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*
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* @param {String} str An optional message to show in place of the default one
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*/
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chartPrototype.showNoData = function (str) {
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var chart = this,
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options = chart.options,
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text = str || options.lang.noData,
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noDataOptions = options.noData;
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if (!chart.noDataLabel) {
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chart.noDataLabel = chart.renderer.label(text, 0, 0, null, null, null, null, null, 'no-data')
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.attr(noDataOptions.attr)
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.css(noDataOptions.style)
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.add();
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chart.noDataLabel.align(extend(chart.noDataLabel.getBBox(), noDataOptions.position), false, 'plotBox');
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}
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};
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/**
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* Hide no-data message
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*/
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chartPrototype.hideNoData = function () {
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var chart = this;
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if (chart.noDataLabel) {
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chart.noDataLabel = chart.noDataLabel.destroy();
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}
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};
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/**
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* Returns true if there are data points within the plot area now
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*/
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chartPrototype.hasData = function () {
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var chart = this,
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series = chart.series,
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i = series.length;
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while (i--) {
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if (series[i].hasData() && !series[i].options.isInternal) {
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return true;
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}
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}
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return false;
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};
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/**
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* Show no-data message if there is no data in sight. Otherwise, hide it.
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*/
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function handleNoData() {
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var chart = this;
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if (chart.hasData()) {
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chart.hideNoData();
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} else {
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chart.showNoData();
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}
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}
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/**
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* Add event listener to handle automatic display of no-data message
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*/
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chartPrototype.callbacks.push(function (chart) {
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H.addEvent(chart, 'load', handleNoData);
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H.addEvent(chart, 'redraw', handleNoData);
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});
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}(Highcharts));
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