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Charts

Client-Side Data Processing

The Chart component can get data from a remote storage and process it on the client side. To implement this functionality, assign a DataSource object to the Chart dataSource property.

In the DataSource, implement a CustomStore. Switch the CustomStore to the raw loadMode and load all data from the server in the load function as shown in the demo. Set the paginate property to false to prevent data from partitioning. You can also apply filter to the received values. In this demo, select different values of the drop-down menu under the chart to apply different filters.

Once you load the data, specify the series type and its nested options: argumentField and valueField, so the component can determine which object fields in the data source indicate Chart arguments and values.

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<template> <div id="chart-demo"> <DxChart :data-source="monthWeather" :customize-point="customizePoint" title="Temperature in Seattle: October 2017" > <DxSize :height="420"/> <DxValueAxis> <DxLabel :customize-text="customizeLabelText" :visible="true" /> </DxValueAxis> <DxSeries argument-field="day" value-field="t" type="bar" /> <DxLegend :visible="false"/> <DxExport :enabled="true"/> <DxLoadingIndicator :enabled="true"/> </DxChart> <div class="action"> <div class="label">Choose a temperature threshold, &deg;C: </div> <DxSelectBox id="choose-temperature" :data-source="temperature" :value="2" :on-value-changed="changeTemperature" /> </div> </div> </template> <script> import DxChart, { DxValueAxis, DxLabel, DxLegend, DxExport, DxSeries, DxSize, DxLoadingIndicator, } from 'devextreme-vue/chart'; import DxSelectBox from 'devextreme-vue/select-box'; import DataSource from 'devextreme/data/data_source'; import CustomStore from 'devextreme/data/custom_store'; const palette = ['#c3a2cc', '#b7b5e0', '#e48cba']; export default { components: { DxChart, DxValueAxis, DxLabel, DxLegend, DxExport, DxLoadingIndicator, DxSeries, DxSize, DxSelectBox, }, data() { const paletteIndex = 0; const monthWeather = new DataSource({ store: new CustomStore({ load: () => fetch('../../../../data/monthWeather.json') .then((e) => e.json()) .catch(() => { throw new Error('Data Loading Error'); }), loadMode: 'raw', }), filter: ['t', '>', '2'], paginate: false, }); return { temperature: [2, 4, 6, 8, 9, 10, 11], monthWeather, paletteIndex, }; }, methods: { changeTemperature({ value }) { this.monthWeather.filter(['t', '>', value]); this.monthWeather.load(); }, customizeLabelText({ valueText }) { return `${valueText}${'&#176C'}`; }, customizePoint() { const color = palette[this.paletteIndex]; this.paletteIndex = this.paletteIndex === 2 ? 0 : this.paletteIndex + 1; return { color }; }, }, }; </script> <style> .action { width: 330px; margin-top: 20px; display: flex; align-items: center; justify-content: space-between; } .action .dx-selectbox { width: 90px; } </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="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.4/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/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>
window.config = { transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader', }, 'devextreme/localization.js': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', }, map: { 'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@22.1.4/cjs', 'devextreme-vue': 'npm:devextreme-vue@22.1.4', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.5.16/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.63/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.32/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.7', 'inferno': 'npm:inferno@7.4.4/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.11/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.11/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.11/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.11/dist/inferno-extras.min.js', 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', }, packages: { 'devextreme-vue': { main: 'index.js', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.7/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, }, }; System.config(window.config);
[ { "day": "1", "t": 11 }, { "day": "2", "t": 7 }, { "day": "3", "t": 6 }, { "day": "4", "t": 8 }, { "day": "5", "t": 7 }, { "day": "6", "t": 7 }, { "day": "7", "t": 11 }, { "day": "8", "t": 9 }, { "day": "9", "t": 5 }, { "day": "10", "t": 8 }, { "day": "11", "t": 6 }, { "day": "12", "t": 9 }, { "day": "13", "t": 8 }, { "day": "14", "t": 6 }, { "day": "15", "t": 6 }, { "day": "16", "t": 6 }, { "day": "17", "t": 10 }, { "day": "18", "t": 9 }, { "day": "19", "t": 12 }, { "day": "20", "t": 9 }, { "day": "21", "t": 8 }, { "day": "22", "t": 13 }, { "day": "23", "t": 9 }, { "day": "24", "t": 7 }, { "day": "25", "t": 6 }, { "day": "26", "t": 11 }, { "day": "27", "t": 8 }, { "day": "28", "t": 7 }, { "day": "29", "t": 9 }, { "day": "30", "t": 7 }, { "day": "31", "t": 3 } ]