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