792 lines
23 KiB
HTML
792 lines
23 KiB
HTML
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<!DOCTYPE HTML>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>Highcharts Example</title>
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<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
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<style type="text/css">
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${demo.css}
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</style>
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<script type="text/javascript">
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/**
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* This is a complex demo of how to set up a Highcharts chart, coupled to a
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* dynamic source and extended by drawing image sprites, wind arrow paths
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* and a second grid on top of the chart. The purpose of the demo is to inpire
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* developers to go beyond the basic chart types and show how the library can
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* be extended programmatically. This is what the demo does:
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*
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* - Loads weather forecast from www.yr.no in form of an XML service. The XML
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* is translated on the Higcharts website into JSONP for the sake of the demo
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* being shown on both our website and JSFiddle.
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* - When the data arrives async, a Meteogram instance is created. We have
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* created the Meteogram prototype to provide an organized structure of the different
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* methods and subroutines associated with the demo.
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* - The parseYrData method parses the data from www.yr.no into several parallel arrays. These
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* arrays are used directly as the data option for temperature, precipitation
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* and air pressure. As the temperature data gives only full degrees, we apply
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* some smoothing on the graph, but keep the original data in the tooltip.
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* - After this, the options structure is build, and the chart generated with the
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* parsed data.
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* - In the callback (on chart load), we weather icons on top of the temperature series.
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* The icons are sprites from a single PNG image, placed inside a clipped 30x30
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* SVG <g> element. VML interprets this as HTML images inside a clipped div.
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* - Lastly, the wind arrows are built and added below the plot area, and a grid is
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* drawn around them. The wind arrows are basically drawn north-south, then rotated
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* as per the wind direction.
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*/
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function Meteogram(xml, container) {
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// Parallel arrays for the chart data, these are populated as the XML/JSON file
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// is loaded
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this.symbols = [];
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this.symbolNames = [];
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this.precipitations = [];
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this.windDirections = [];
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this.windDirectionNames = [];
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this.windSpeeds = [];
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this.windSpeedNames = [];
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this.temperatures = [];
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this.pressures = [];
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// Initialize
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this.xml = xml;
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this.container = container;
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// Run
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this.parseYrData();
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}
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/**
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* Return weather symbol sprites as laid out at http://om.yr.no/forklaring/symbol/
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*/
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Meteogram.prototype.getSymbolSprites = function (symbolSize) {
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return {
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'01d': {
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x: 0,
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y: 0
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},
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'01n': {
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x: symbolSize,
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y: 0
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},
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'16': {
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x: 2 * symbolSize,
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y: 0
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},
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'02d': {
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x: 0,
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y: symbolSize
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},
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'02n': {
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x: symbolSize,
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y: symbolSize
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},
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'03d': {
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x: 0,
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y: 2 * symbolSize
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},
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'03n': {
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x: symbolSize,
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y: 2 * symbolSize
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},
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'17': {
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x: 2 * symbolSize,
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y: 2 * symbolSize
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},
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'04': {
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x: 0,
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y: 3 * symbolSize
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},
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'05d': {
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x: 0,
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y: 4 * symbolSize
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},
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'05n': {
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x: symbolSize,
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y: 4 * symbolSize
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},
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'18': {
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x: 2 * symbolSize,
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y: 4 * symbolSize
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},
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'06d': {
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x: 0,
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y: 5 * symbolSize
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},
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'06n': {
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x: symbolSize,
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y: 5 * symbolSize
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},
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'07d': {
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x: 0,
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y: 6 * symbolSize
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},
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'07n': {
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x: symbolSize,
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y: 6 * symbolSize
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},
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'08d': {
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x: 0,
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y: 7 * symbolSize
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},
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'08n': {
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x: symbolSize,
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y: 7 * symbolSize
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},
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'19': {
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x: 2 * symbolSize,
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y: 7 * symbolSize
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},
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'09': {
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x: 0,
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y: 8 * symbolSize
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},
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'10': {
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x: 0,
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y: 9 * symbolSize
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},
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'11': {
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x: 0,
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y: 10 * symbolSize
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},
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'12': {
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x: 0,
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y: 11 * symbolSize
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},
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'13': {
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x: 0,
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y: 12 * symbolSize
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},
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'14': {
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x: 0,
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y: 13 * symbolSize
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},
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'15': {
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x: 0,
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y: 14 * symbolSize
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},
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'20d': {
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x: 0,
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y: 15 * symbolSize
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},
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'20n': {
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x: symbolSize,
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y: 15 * symbolSize
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},
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'20m': {
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x: 2 * symbolSize,
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y: 15 * symbolSize
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},
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'21d': {
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x: 0,
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y: 16 * symbolSize
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},
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'21n': {
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x: symbolSize,
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y: 16 * symbolSize
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},
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'21m': {
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x: 2 * symbolSize,
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y: 16 * symbolSize
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},
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'22': {
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x: 0,
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y: 17 * symbolSize
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},
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'23': {
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x: 0,
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y: 18 * symbolSize
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}
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};
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};
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/**
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* Function to smooth the temperature line. The original data provides only whole degrees,
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* which makes the line graph look jagged. So we apply a running mean on it, but preserve
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* the unaltered value in the tooltip.
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*/
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Meteogram.prototype.smoothLine = function (data) {
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var i = data.length,
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sum,
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value;
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while (i--) {
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data[i].value = value = data[i].y; // preserve value for tooltip
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// Set the smoothed value to the average of the closest points, but don't allow
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// it to differ more than 0.5 degrees from the given value
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sum = (data[i - 1] || data[i]).y + value + (data[i + 1] || data[i]).y;
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data[i].y = Math.max(value - 0.5, Math.min(sum / 3, value + 0.5));
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}
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};
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/**
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* Callback function that is called from Highcharts on hovering each point and returns
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* HTML for the tooltip.
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*/
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Meteogram.prototype.tooltipFormatter = function (tooltip) {
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// Create the header with reference to the time interval
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var index = tooltip.points[0].point.index,
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ret = '<small>' + Highcharts.dateFormat('%A, %b %e, %H:%M', tooltip.x) + '-' +
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Highcharts.dateFormat('%H:%M', tooltip.points[0].point.to) + '</small><br>';
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// Symbol text
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ret += '<b>' + this.symbolNames[index] + '</b>';
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ret += '<table>';
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// Add all series
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Highcharts.each(tooltip.points, function (point) {
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var series = point.series;
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ret += '<tr><td><span style="color:' + series.color + '">\u25CF</span> ' + series.name +
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': </td><td style="white-space:nowrap">' + Highcharts.pick(point.point.value, point.y) +
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series.options.tooltip.valueSuffix + '</td></tr>';
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});
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// Add wind
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ret += '<tr><td style="vertical-align: top">\u25CF Wind</td><td style="white-space:nowrap">' + this.windDirectionNames[index] +
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'<br>' + this.windSpeedNames[index] + ' (' +
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Highcharts.numberFormat(this.windSpeeds[index], 1) + ' m/s)</td></tr>';
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// Close
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ret += '</table>';
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return ret;
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};
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/**
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* Draw the weather symbols on top of the temperature series. The symbols are sprites of a single
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* file, defined in the getSymbolSprites function above.
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*/
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Meteogram.prototype.drawWeatherSymbols = function (chart) {
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var meteogram = this,
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symbolSprites = this.getSymbolSprites(30);
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$.each(chart.series[0].data, function (i, point) {
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var sprite,
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group;
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if (meteogram.resolution > 36e5 || i % 2 === 0) {
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sprite = symbolSprites[meteogram.symbols[i]];
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if (sprite) {
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// Create a group element that is positioned and clipped at 30 pixels width and height
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group = chart.renderer.g()
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.attr({
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translateX: point.plotX + chart.plotLeft - 15,
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translateY: point.plotY + chart.plotTop - 30,
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zIndex: 5
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})
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.clip(chart.renderer.clipRect(0, 0, 30, 30))
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.add();
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// Position the image inside it at the sprite position
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chart.renderer.image(
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'https://www.highcharts.com/samples/graphics/meteogram-symbols-30px.png',
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-sprite.x,
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-sprite.y,
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90,
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570
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)
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.add(group);
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}
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}
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});
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};
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/**
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* Create wind speed symbols for the Beaufort wind scale. The symbols are rotated
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* around the zero centerpoint.
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*/
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Meteogram.prototype.windArrow = function (name) {
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var level,
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path;
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// The stem and the arrow head
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path = [
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'M', 0, 7, // base of arrow
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'L', -1.5, 7,
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0, 10,
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1.5, 7,
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0, 7,
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0, -10 // top
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];
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level = $.inArray(name, ['Calm', 'Light air', 'Light breeze', 'Gentle breeze', 'Moderate breeze',
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'Fresh breeze', 'Strong breeze', 'Near gale', 'Gale', 'Strong gale', 'Storm',
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'Violent storm', 'Hurricane']);
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if (level === 0) {
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path = [];
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}
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if (level === 2) {
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path.push('M', 0, -8, 'L', 4, -8); // short line
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} else if (level >= 3) {
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path.push(0, -10, 7, -10); // long line
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}
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if (level === 4) {
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path.push('M', 0, -7, 'L', 4, -7);
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} else if (level >= 5) {
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path.push('M', 0, -7, 'L', 7, -7);
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}
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if (level === 5) {
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path.push('M', 0, -4, 'L', 4, -4);
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} else if (level >= 6) {
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path.push('M', 0, -4, 'L', 7, -4);
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}
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if (level === 7) {
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path.push('M', 0, -1, 'L', 4, -1);
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} else if (level >= 8) {
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path.push('M', 0, -1, 'L', 7, -1);
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}
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return path;
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};
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/**
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* Draw the wind arrows. Each arrow path is generated by the windArrow function above.
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*/
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Meteogram.prototype.drawWindArrows = function (chart) {
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var meteogram = this;
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$.each(chart.series[0].data, function (i, point) {
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var arrow, x, y;
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if (meteogram.resolution > 36e5 || i % 2 === 0) {
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// Draw the wind arrows
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x = point.plotX + chart.plotLeft + 7;
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y = 255;
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if (meteogram.windSpeedNames[i] === 'Calm') {
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arrow = chart.renderer.circle(x, y, 10).attr({
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fill: 'none'
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});
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} else {
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arrow = chart.renderer.path(
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meteogram.windArrow(meteogram.windSpeedNames[i])
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).attr({
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rotation: parseInt(meteogram.windDirections[i], 10),
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translateX: x, // rotation center
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translateY: y // rotation center
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});
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}
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arrow.attr({
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stroke: (Highcharts.theme && Highcharts.theme.contrastTextColor) || 'black',
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'stroke-width': 1.5,
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zIndex: 5
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})
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.add();
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}
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});
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};
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/**
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* Draw blocks around wind arrows, below the plot area
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*/
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Meteogram.prototype.drawBlocksForWindArrows = function (chart) {
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var xAxis = chart.xAxis[0],
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x,
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pos,
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max,
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isLong,
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isLast,
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i;
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for (pos = xAxis.min, max = xAxis.max, i = 0; pos <= max + 36e5; pos += 36e5, i += 1) {
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// Get the X position
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isLast = pos === max + 36e5;
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x = Math.round(xAxis.toPixels(pos)) + (isLast ? 0.5 : -0.5);
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// Draw the vertical dividers and ticks
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if (this.resolution > 36e5) {
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isLong = pos % this.resolution === 0;
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} else {
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isLong = i % 2 === 0;
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}
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chart.renderer.path(['M', x, chart.plotTop + chart.plotHeight + (isLong ? 0 : 28),
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'L', x, chart.plotTop + chart.plotHeight + 32, 'Z'])
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.attr({
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'stroke': chart.options.chart.plotBorderColor,
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'stroke-width': 1
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})
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.add();
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}
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};
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/**
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* Get the title based on the XML data
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*/
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Meteogram.prototype.getTitle = function () {
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return 'Meteogram for ' + this.xml.location.name + ', ' + this.xml.location.country;
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};
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/**
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* Build and return the Highcharts options structure
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*/
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Meteogram.prototype.getChartOptions = function () {
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var meteogram = this;
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return {
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chart: {
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renderTo: this.container,
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marginBottom: 70,
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marginRight: 40,
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marginTop: 50,
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plotBorderWidth: 1,
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width: 800,
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height: 310
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},
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title: {
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text: this.getTitle(),
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align: 'left'
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},
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credits: {
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text: 'Forecast from <a href="http://yr.no">yr.no</a>',
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href: this.xml.credit.link['@attributes'].url,
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position: {
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x: -40
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}
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},
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tooltip: {
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shared: true,
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useHTML: true,
|
||
|
formatter: function () {
|
||
|
return meteogram.tooltipFormatter(this);
|
||
|
}
|
||
|
},
|
||
|
|
||
|
xAxis: [{ // Bottom X axis
|
||
|
type: 'datetime',
|
||
|
tickInterval: 2 * 36e5, // two hours
|
||
|
minorTickInterval: 36e5, // one hour
|
||
|
tickLength: 0,
|
||
|
gridLineWidth: 1,
|
||
|
gridLineColor: (Highcharts.theme && Highcharts.theme.background2) || '#F0F0F0',
|
||
|
startOnTick: false,
|
||
|
endOnTick: false,
|
||
|
minPadding: 0,
|
||
|
maxPadding: 0,
|
||
|
offset: 30,
|
||
|
showLastLabel: true,
|
||
|
labels: {
|
||
|
format: '{value:%H}'
|
||
|
}
|
||
|
}, { // Top X axis
|
||
|
linkedTo: 0,
|
||
|
type: 'datetime',
|
||
|
tickInterval: 24 * 3600 * 1000,
|
||
|
labels: {
|
||
|
format: '{value:<span style="font-size: 12px; font-weight: bold">%a</span> %b %e}',
|
||
|
align: 'left',
|
||
|
x: 3,
|
||
|
y: -5
|
||
|
},
|
||
|
opposite: true,
|
||
|
tickLength: 20,
|
||
|
gridLineWidth: 1
|
||
|
}],
|
||
|
|
||
|
yAxis: [{ // temperature axis
|
||
|
title: {
|
||
|
text: null
|
||
|
},
|
||
|
labels: {
|
||
|
format: '{value}°',
|
||
|
style: {
|
||
|
fontSize: '10px'
|
||
|
},
|
||
|
x: -3
|
||
|
},
|
||
|
plotLines: [{ // zero plane
|
||
|
value: 0,
|
||
|
color: '#BBBBBB',
|
||
|
width: 1,
|
||
|
zIndex: 2
|
||
|
}],
|
||
|
// Custom positioner to provide even temperature ticks from top down
|
||
|
tickPositioner: function () {
|
||
|
var max = Math.ceil(this.max) + 1,
|
||
|
pos = max - 12, // start
|
||
|
ret;
|
||
|
|
||
|
if (pos < this.min) {
|
||
|
ret = [];
|
||
|
while (pos <= max) {
|
||
|
ret.push(pos += 1);
|
||
|
}
|
||
|
} // else return undefined and go auto
|
||
|
|
||
|
return ret;
|
||
|
|
||
|
},
|
||
|
maxPadding: 0.3,
|
||
|
tickInterval: 1,
|
||
|
gridLineColor: (Highcharts.theme && Highcharts.theme.background2) || '#F0F0F0'
|
||
|
|
||
|
}, { // precipitation axis
|
||
|
title: {
|
||
|
text: null
|
||
|
},
|
||
|
labels: {
|
||
|
enabled: false
|
||
|
},
|
||
|
gridLineWidth: 0,
|
||
|
tickLength: 0
|
||
|
|
||
|
}, { // Air pressure
|
||
|
allowDecimals: false,
|
||
|
title: { // Title on top of axis
|
||
|
text: 'hPa',
|
||
|
offset: 0,
|
||
|
align: 'high',
|
||
|
rotation: 0,
|
||
|
style: {
|
||
|
fontSize: '10px',
|
||
|
color: Highcharts.getOptions().colors[2]
|
||
|
},
|
||
|
textAlign: 'left',
|
||
|
x: 3
|
||
|
},
|
||
|
labels: {
|
||
|
style: {
|
||
|
fontSize: '8px',
|
||
|
color: Highcharts.getOptions().colors[2]
|
||
|
},
|
||
|
y: 2,
|
||
|
x: 3
|
||
|
},
|
||
|
gridLineWidth: 0,
|
||
|
opposite: true,
|
||
|
showLastLabel: false
|
||
|
}],
|
||
|
|
||
|
legend: {
|
||
|
enabled: false
|
||
|
},
|
||
|
|
||
|
plotOptions: {
|
||
|
series: {
|
||
|
pointPlacement: 'between'
|
||
|
}
|
||
|
},
|
||
|
|
||
|
|
||
|
series: [{
|
||
|
name: 'Temperature',
|
||
|
data: this.temperatures,
|
||
|
type: 'spline',
|
||
|
marker: {
|
||
|
enabled: false,
|
||
|
states: {
|
||
|
hover: {
|
||
|
enabled: true
|
||
|
}
|
||
|
}
|
||
|
},
|
||
|
tooltip: {
|
||
|
valueSuffix: '°C'
|
||
|
},
|
||
|
zIndex: 1,
|
||
|
color: '#FF3333',
|
||
|
negativeColor: '#48AFE8'
|
||
|
}, {
|
||
|
name: 'Precipitation',
|
||
|
data: this.precipitations,
|
||
|
type: 'column',
|
||
|
color: '#68CFE8',
|
||
|
yAxis: 1,
|
||
|
groupPadding: 0,
|
||
|
pointPadding: 0,
|
||
|
borderWidth: 0,
|
||
|
shadow: false,
|
||
|
dataLabels: {
|
||
|
enabled: true,
|
||
|
formatter: function () {
|
||
|
if (this.y > 0) {
|
||
|
return this.y;
|
||
|
}
|
||
|
},
|
||
|
style: {
|
||
|
fontSize: '8px'
|
||
|
}
|
||
|
},
|
||
|
tooltip: {
|
||
|
valueSuffix: 'mm'
|
||
|
}
|
||
|
}, {
|
||
|
name: 'Air pressure',
|
||
|
color: Highcharts.getOptions().colors[2],
|
||
|
data: this.pressures,
|
||
|
marker: {
|
||
|
enabled: false
|
||
|
},
|
||
|
shadow: false,
|
||
|
tooltip: {
|
||
|
valueSuffix: ' hPa'
|
||
|
},
|
||
|
dashStyle: 'shortdot',
|
||
|
yAxis: 2
|
||
|
}]
|
||
|
};
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* Post-process the chart from the callback function, the second argument to Highcharts.Chart.
|
||
|
*/
|
||
|
Meteogram.prototype.onChartLoad = function (chart) {
|
||
|
|
||
|
this.drawWeatherSymbols(chart);
|
||
|
this.drawWindArrows(chart);
|
||
|
this.drawBlocksForWindArrows(chart);
|
||
|
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* Create the chart. This function is called async when the data file is loaded and parsed.
|
||
|
*/
|
||
|
Meteogram.prototype.createChart = function () {
|
||
|
var meteogram = this;
|
||
|
this.chart = new Highcharts.Chart(this.getChartOptions(), function (chart) {
|
||
|
meteogram.onChartLoad(chart);
|
||
|
});
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* Handle the data. This part of the code is not Highcharts specific, but deals with yr.no's
|
||
|
* specific data format
|
||
|
*/
|
||
|
Meteogram.prototype.parseYrData = function () {
|
||
|
|
||
|
var meteogram = this,
|
||
|
xml = this.xml,
|
||
|
pointStart;
|
||
|
|
||
|
if (!xml || !xml.forecast) {
|
||
|
$('#loading').html('<i class="fa fa-frown-o"></i> Failed loading data, please try again later');
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
// The returned xml variable is a JavaScript representation of the provided XML,
|
||
|
// generated on the server by running PHP simple_load_xml and converting it to
|
||
|
// JavaScript by json_encode.
|
||
|
$.each(xml.forecast.tabular.time, function (i, time) {
|
||
|
// Get the times - only Safari can't parse ISO8601 so we need to do some replacements
|
||
|
var from = time['@attributes'].from + ' UTC',
|
||
|
to = time['@attributes'].to + ' UTC';
|
||
|
|
||
|
from = from.replace(/-/g, '/').replace('T', ' ');
|
||
|
from = Date.parse(from);
|
||
|
to = to.replace(/-/g, '/').replace('T', ' ');
|
||
|
to = Date.parse(to);
|
||
|
|
||
|
if (to > pointStart + 4 * 24 * 36e5) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
// If it is more than an hour between points, show all symbols
|
||
|
if (i === 0) {
|
||
|
meteogram.resolution = to - from;
|
||
|
}
|
||
|
|
||
|
// Populate the parallel arrays
|
||
|
meteogram.symbols.push(time.symbol['@attributes']['var'].match(/[0-9]{2}[dnm]?/)[0]); // eslint-disable-line dot-notation
|
||
|
meteogram.symbolNames.push(time.symbol['@attributes'].name);
|
||
|
|
||
|
meteogram.temperatures.push({
|
||
|
x: from,
|
||
|
y: parseInt(time.temperature['@attributes'].value, 10),
|
||
|
// custom options used in the tooltip formatter
|
||
|
to: to,
|
||
|
index: i
|
||
|
});
|
||
|
|
||
|
meteogram.precipitations.push({
|
||
|
x: from,
|
||
|
y: parseFloat(time.precipitation['@attributes'].value)
|
||
|
});
|
||
|
meteogram.windDirections.push(parseFloat(time.windDirection['@attributes'].deg));
|
||
|
meteogram.windDirectionNames.push(time.windDirection['@attributes'].name);
|
||
|
meteogram.windSpeeds.push(parseFloat(time.windSpeed['@attributes'].mps));
|
||
|
meteogram.windSpeedNames.push(time.windSpeed['@attributes'].name);
|
||
|
|
||
|
meteogram.pressures.push({
|
||
|
x: from,
|
||
|
y: parseFloat(time.pressure['@attributes'].value)
|
||
|
});
|
||
|
|
||
|
if (i === 0) {
|
||
|
pointStart = (from + to) / 2;
|
||
|
}
|
||
|
});
|
||
|
|
||
|
// Smooth the line
|
||
|
this.smoothLine(this.temperatures);
|
||
|
|
||
|
// Create the chart when the data is loaded
|
||
|
this.createChart();
|
||
|
};
|
||
|
// End of the Meteogram protype
|
||
|
|
||
|
|
||
|
|
||
|
$(function () { // On DOM ready...
|
||
|
|
||
|
// Set the hash to the yr.no URL we want to parse
|
||
|
if (!location.hash) {
|
||
|
var place = 'United_Kingdom/England/London';
|
||
|
//place = 'France/Rhône-Alpes/Val_d\'Isère~2971074';
|
||
|
//place = 'Norway/Sogn_og_Fjordane/Vik/Målset';
|
||
|
//place = 'United_States/California/San_Francisco';
|
||
|
//place = 'United_States/Minnesota/Minneapolis';
|
||
|
location.hash = 'https://www.yr.no/place/' + place + '/forecast_hour_by_hour.xml';
|
||
|
|
||
|
}
|
||
|
|
||
|
// Then get the XML file through Highcharts' jsonp provider, see
|
||
|
// https://github.com/highcharts/highcharts/blob/master/samples/data/jsonp.php
|
||
|
// for source code.
|
||
|
$.getJSON(
|
||
|
'https://www.highcharts.com/samples/data/jsonp.php?url=' + location.hash.substr(1) + '&callback=?',
|
||
|
function (xml) {
|
||
|
window.meteogram = new Meteogram(xml, 'container');
|
||
|
}
|
||
|
);
|
||
|
|
||
|
});
|
||
|
</script>
|
||
|
</head>
|
||
|
<body>
|
||
|
|
||
|
<script src="https://code.highcharts.com/highcharts.js"></script>
|
||
|
<script src="https://code.highcharts.com/modules/exporting.js"></script>
|
||
|
<link href="https://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">
|
||
|
|
||
|
<div id="container" style="width: 800px; height: 310px; margin: 0 auto">
|
||
|
<div style="margin-top: 100px; text-align: center" id="loading">
|
||
|
<i class="fa fa-spinner fa-spin"></i> Loading data from external source
|
||
|
</div>
|
||
|
</div>
|
||
|
<!--
|
||
|
<div style="width: 800px; margin: 0 auto">
|
||
|
<a href="#http://www.yr.no/place/United_Kingdom/England/London/forecast_hour_by_hour.xml">London</a>,
|
||
|
<a href="#http://www.yr.no/place/France/Rhône-Alpes/Val_d\'Isère~2971074/forecast_hour_by_hour.xml">Val d'Isère</a>,
|
||
|
<a href="#http://www.yr.no/place/United_States/California/San_Francisco/forecast_hour_by_hour.xml">San Francisco</a>,
|
||
|
<a href="#http://www.yr.no/place/Norway/Vik/Vikafjell/forecast_hour_by_hour.xml">Vikjafjellet</a>
|
||
|
</div>
|
||
|
-->
|
||
|
</body>
|
||
|
</html>
|