Variable Number of Subvalue Indicators

Documentation

This demo shows how to use the API of the LinearGauge to change its value and subvalue indicators at runtime. To get and set values of the indicators, the value and subvalues methods are utilized.

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Backend API

<template> <div> <div id="gauge-demo"> <DxLinearGauge id="gauge" :value="value.primary" :subvalues="value.secondary" > <DxScale :start-value="0" :end-value="10" :tick-interval="2" > <DxLabel :customize-text="customizeText" /> </DxScale> <DxTooltip :enabled="true" :customize-tooltip="customizeTooltip" /> <DxExport :enabled="true" /> <DxTitle text="Power of Air Conditioners in Store Departments (kW)" > <DxFont :size="28" /> </DxTitle> </DxLinearGauge> <DxSelectBox id="selectbox" :data-source="dataSource" v-model:value="value" :input-attr="{ 'aria-label': 'Department' }" :width="200" display-expr="name" /> </div> </div> </template> <script> import { DxLinearGauge, DxScale, DxLabel, DxTooltip, DxExport, DxTitle, DxFont, } from 'devextreme-vue/linear-gauge'; import { DxSelectBox } from 'devextreme-vue/select-box'; import { dataSource } from './data.js'; export default { components: { DxLinearGauge, DxScale, DxLabel, DxTooltip, DxExport, DxTitle, DxFont, DxSelectBox, }, data() { return { dataSource, value: dataSource[0], }; }, methods: { customizeText({ valueText }) { return `${valueText} kW`; }, customizeTooltip(scaleValue) { let result = `${scaleValue.valueText} kW`; if (scaleValue.index >= 0) { result = `Secondary ${scaleValue.index + 1}: ${result}`; } else { result = `Primary: ${result}`; } return { text: result, }; }, }, }; </script> <style scoped> #gauge-demo { height: 440px; width: 100%; } #gauge { height: 400px; } </style>

import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');

<!DOCTYPE html> <html> <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=1.0" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/23.1.5/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.js"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> </body> </html>

export const dataSource = [{ name: 'Meat', primary: 8, secondary: [7, 3], }, { name: 'Fish', primary: 7, secondary: [7, 5, 1], }, { name: 'Grocery', primary: 5, secondary: [1, 3], }, { name: 'Greengrocery', primary: 3, secondary: [1], }, { name: 'Stationery', primary: 2, secondary: [], }];