JavaScript/jQuery Gauges - Update Bar Gauge Data at Runtime

This demo illustrates how to bind an array of values to the BarGauge. Since an array can not be bound to a field as a regular value, it is bound as a computed one.

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Backend API

$(() => { function getBasicColors(value) { const code = Number(`0x${value.slice(1)}`); $('.color-box').css('background-color', value); return [ (code >> 16) & 0xff, (code >> 8) & 0xff, code & 0xff, ]; } const gauge = $('#gauge').dxBarGauge({ startValue: 0, endValue: 255, palette: ['#ff0000', '#00ff00', '#0000ff'], label: { visible: false, }, values: getBasicColors(colors[0].code), }).dxBarGauge('instance'); $('#select-color').dxSelectBox({ width: 150, inputAttr: { 'aria-label': 'Color' }, dataSource: colors, displayExpr: 'name', value: colors[0], onSelectionChanged(e) { gauge.option('values', getBasicColors(e.selectedItem.code)); }, }); });

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx.light.css" /> <script src="js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div class="long-title"><h3>Colors Representation via Basic Colors</h3></div> <div id="gauge-demo"> <div id="gauge"></div> <div class="action-container"> <div id="select-color"></div> <div class="color-box"></div> </div> </div> </div> </body> </html>

#gauge-demo { height: 440px; width: 100%; } #gauge { width: 80%; height: 100%; margin-top: 20px; float: left; } .action-container { width: 20%; text-align: left; margin-top: 20px; float: left; } .color-box { width: 40px; height: 40px; margin-top: 20px; } .long-title h3 { font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; }

const colors = [{ name: 'Amaranth', code: '#e52b50', }, { name: 'Amethyst', code: '#9966cc', }, { name: 'Ash grey', code: '#b2beb5', }, { name: 'Barn red', code: '#7c0a02', }, { name: 'Imperial', code: '#602f6b', }, { name: 'Lemon lime', code: '#e3ff00', }, { name: 'Mountain Meadow', code: '#30ba8f', }, { name: 'Outer Space', code: '#414a4c', }, { name: 'Persian plum', code: '#701c1c', }, { name: 'Seal brown', code: '#321414', }, { name: 'Twilight lavender', code: '#8a496b', }, { name: 'Umber', code: '#635147', }];