forked from Mirrors/apostrophe
189 lines
5.8 KiB
HTML
189 lines
5.8 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset='utf-8'>
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<title>Heatmaps - Handsontable</title>
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<!--
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Loading Handsontable (full distribution that includes all dependencies
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-->
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<link data-jsfiddle="common" rel="stylesheet" media="screen" href="../dist/handsontable.full.css">
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<script data-jsfiddle="common" src="../dist/handsontable.full.js"></script>
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<!--
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Loading demo dependencies. They are used here only to enhance the examples on this page
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-->
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<link data-jsfiddle="common" rel="stylesheet" media="screen" href="css/samples.css?20140331">
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<script src="js/samples.js"></script>
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<script src="js/highlight/highlight.pack.js"></script>
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<link rel="stylesheet" media="screen" href="js/highlight/styles/github.css">
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<link rel="stylesheet" href="css/font-awesome/css/font-awesome.min.css">
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<script data-jsfiddle="common" src="bower_components/chroma-js/chroma.min.js"></script>
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<!--
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Facebook open graph. Don't copy this to your project :)
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-->
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<meta property="og:title" content="Heatmaps for values in a column">
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<meta property="og:description"
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content="">
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<meta property="og:url" content="http://handsontable.com/demo/heatmaps.html">
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<meta property="og:image" content="http://handsontable.com/demo/image/og-image.png">
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<meta property="og:image:type" content="image/png">
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<meta property="og:image:width" content="409">
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<meta property="og:image:height" content="164">
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<link rel="canonical" href="http://handsontable.com/demo/heatmaps.html">
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<!--
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Google Analytics for GitHub Page. Don't copy this to your project :)
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-->
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<script src="js/ga.js"></script>
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</head>
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<body>
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<div class="wrapper">
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<div class="wrapper-row">
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<div id="global-menu-clone">
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<h1><a href="../index.html">Handsontable</a></h1>
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</div>
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<div id="container">
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<div class="columnLayout">
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<div class="rowLayout">
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<div class="descLayout">
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<div class="pad" data-jsfiddle="example1">
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<a name="lazy"></a>
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<h2>Heatmaps for values in a column</h2>
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<p>
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The following demo shows an example of using heatmaps for the values in tha grid's columns.
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</p>
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<p>
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Changing the values in the grid automatically recalculates the font color for the whole column, thereby
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updating a heatmap.
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</p>
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<p>
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The dynamic color scale calculation is done using the excellent <a href="http://driven-by-data.net/about/chromajs">Chroma.js</a>.
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</p>
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<div id="example1"></div>
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</div>
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</div>
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<div class="codeLayout">
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<div class="pad">
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<div class="jsFiddle">
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<button class="jsFiddleLink" data-runfiddle="example1">Edit in jsFiddle</button>
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</div>
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<script data-jsfiddle="example1">
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var data = [
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[2002, 190251, 5090, 195341],
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[2003, 224495, 6486, 230981],
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[2004, 254044, 6765, 260809],
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[2005, 254099, 7521, 261620],
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[2006, 271108, 9449, 280557],
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[2007, 280565, 11714, 292279],
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[2008, 284120, 11292, 295412],
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[2009, 279742, 11468, 291210],
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[2010, 290411, 11806, 302217],
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[2011, 290652, 10891, 301543],
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[2012, 283863, 10402, 294265],
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[2013, 267646, 10104, 255850]
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],
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container = document.getElementById('example1'),
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lastChange = null,
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heatmap,
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heatmapScale,
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hot;
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heatmapScale = chroma.scale(['#17F556', '#ED6D47']);
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hot = new Handsontable(container,{
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data: data,
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colHeaders: ["Year", "Domestic Flights", "International Flights", "Total Flights"],
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columns: [
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{
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type: 'numeric'
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},
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{
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type: 'numeric',
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format: '0,0',
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renderer: heatmapRenderer
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},
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{
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type: 'numeric',
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format: '0,0',
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renderer: heatmapRenderer
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},
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{
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type: 'numeric',
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format: '0,0',
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renderer: heatmapRenderer
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},
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],
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afterLoadData: updateHeatmap,
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beforeChangeRender: updateHeatmap
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});
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function updateHeatmap(change, source) {
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if (change) {
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heatmap[change[0][1]] = generateHeatmapData.call(this, change[0][1]);
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} else {
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heatmap = [];
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for(var i = 1, colCount = this.countCols(); i < colCount ; i++) {
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heatmap[i] = generateHeatmapData.call(this, i);
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}
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}
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}
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function point(min, max, value) {
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return (value - min) / (max - min);
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}
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function generateHeatmapData(colId) {
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var values = this.getDataAtCol(colId);
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return {
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min: Math.min.apply(null, values),
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max: Math.max.apply(null, values)
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};
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}
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function heatmapRenderer(instance, td, row, col, prop, value, cellProperties) {
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Handsontable.renderers.TextRenderer.apply(this, arguments);
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if (heatmap[col]) {
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td.style.backgroundColor = heatmapScale(point(heatmap[col].min, heatmap[col].max, parseInt(value, 10))).hex();
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td.style.textAlign = 'right';
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td.style.fontWeight = 'bold';
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}
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}
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</script>
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</div>
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</div>
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</div>
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<div class="footer-text">
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</div>
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</div>
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</div>
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</div>
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</div>
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<div id="outside-links-wrapper"></div>
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</body>
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</html>
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