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Revision Autor Zeilennr. Zeile
875 lars 1 
/**
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 * @license Highstock JS v2.1.8 (2015-08-20)
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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) 2010-2014 Highsoft AS
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 * Author: Oystein Moseng
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 *
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 * License: www.highcharts.com/license
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 */
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(function (H) {
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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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		each = H.each;
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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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		// useHTML: false // docs
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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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	each(['pie', 'gauge', 'waterfall', 'bubble'], function (type) {
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		if (seriesTypes[type]) {
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			seriesTypes[type].prototype.hasData = hasDataPie;
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		}
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	});
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	H.Series.prototype.hasData = function () {
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		return this.visible && this.dataMax !== undefined && this.dataMin !== undefined; // #3703
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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
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				.label(
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					text,
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					0,
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					0,
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					null,
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					null,
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					null,
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					noDataOptions.useHTML,
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					null,
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					'no-data'
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				)
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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));