Discrete scale
Documentation
In this demo, a discrete scale is used to select a range within a set of categories.
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import React from 'react';
import RangeSelector, { Chart, Series } from 'devextreme-react/range-selector';
import { dataSource } from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
totalProduction: calculateTotalProduction(),
};
this.processRange = this.processRange.bind(this);
}
render() {
return (
<div id="range-selector-demo">
<RangeSelector
id="range-selector"
title="Copper Production in 2013"
dataSource={dataSource}
onValueChanged={this.processRange}
>
<Chart>
<Series type="bar" argumentField="country" valueField="copper" />
</Chart>
</RangeSelector>
<h2>Total: { this.state.totalProduction } tons</h2>
</div>
);
}
processRange(e) {
this.setState({
totalProduction: calculateTotalProduction(e.value),
});
}
}
const formatNumber = new Intl.NumberFormat('en-US', { minimumFractionDigits: 0 }).format;
function calculateTotalProduction(range = []) {
let startIndex = 0;
let endIndex = dataSource.length;
dataSource.forEach((item, index) => {
if (item.country === range[0]) {
startIndex = index;
}
if (item.country === range[1]) {
endIndex = index + 1;
}
});
return formatNumber(dataSource
.slice(startIndex, endIndex)
.reduce((total, item) => total + item.copper, 0));
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('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/22.1.3/css/dx.common.css" />
<link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/22.1.3/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.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>
#range-selector-demo {
text-align: center;
}
#range-selector {
margin-bottom: 20px;
height: 200px;
}
export const dataSource = [
{ country: 'Chile', copper: 5700000 },
{ country: 'United States', copper: 1220000 },
{ country: 'Peru', copper: 1300000 },
{ country: 'China', copper: 1650000 },
{ country: 'Australia', copper: 990000 },
{ country: 'Russia', copper: 930000 },
{ country: 'DR Congo', copper: 900000 },
{ country: 'Finland', copper: 119000 },
];
window.config = {
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.8.1/prop-types.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@22.1.3/cjs',
'devextreme-react': 'npm:devextreme-react@22.1.3',
'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@2.1.57/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.30/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',
// SystemJS plugins
'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': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.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,
react: true,
},
};
System.config(window.config);