import React, { useState } from 'react';
import DataSource from 'devextreme/data/data_source';
import {
Chart,
ChartTypes,
ZoomAndPan,
ScrollBar,
ArgumentAxis,
ValueAxis,
Title,
Label,
Font,
Legend,
Series,
Animation,
LoadingIndicator,
} from 'devextreme-react/chart';
const HALFDAY = 43200000;
let packetsLock = 0;
const chartDataSource = new DataSource({
store: [],
sort: 'date',
paginate: false,
});
const wholeRange = {
startValue: new Date(2017, 0, 1),
endValue: new Date(2017, 11, 31),
};
function App() {
const [visualRange, setVisualRange] = useState({
startValue: new Date(2017, 3, 1),
endValue: new Date(2017, 3, 15),
});
const handleChange = (e: ChartTypes.OptionChangedEvent) => {
if (e.fullName === 'argumentAxis.visualRange') {
const stateStart = visualRange.startValue;
const currentStart = e.value.startValue;
if (stateStart.valueOf() !== currentStart.valueOf()) {
setVisualRange(e.value);
}
onVisualRangeChanged(e.value, e.component);
}
};
return (
<Chart
id="chart"
title="Temperature in Toronto (2017)"
dataSource={chartDataSource}
onOptionChanged={handleChange}
>
<ZoomAndPan argumentAxis="pan" />
<ScrollBar visible={true} />
<ArgumentAxis
argumentType="datetime"
visualRangeUpdateMode="keep"
visualRange={visualRange}
wholeRange={wholeRange}
/>
<ValueAxis name="temperature" allowDecimals={false}>
<Title text='Temperature, °C'>
<Font color="#ff950c" />
</Title>
<Label>
<Font color="#ff950c" />
</Label>
</ValueAxis>
<Series
color="#ff950c"
type="rangearea"
argumentField="date"
rangeValue1Field="minTemp"
rangeValue2Field="maxTemp"
name="Temperature range"
/>
<Animation enabled={false} />
<LoadingIndicator backgroundColor="none">
<Font size={14} />
</LoadingIndicator>
<Legend visible={false} />
</Chart>
);
}
const uploadDataByVisualRange = (visualRange, component) => {
const dataSource = component.getDataSource();
const storage = dataSource.items();
const ajaxArgs = {
startVisible: getDateString(visualRange.startValue),
endVisible: getDateString(visualRange.endValue),
startBound: getDateString(storage.length ? storage[0].date : null),
endBound: getDateString(
storage.length ? storage[storage.length - 1].date : null,
),
};
if (
ajaxArgs.startVisible !== ajaxArgs.startBound
&& ajaxArgs.endVisible !== ajaxArgs.endBound
&& !packetsLock
) {
packetsLock += 1;
component.showLoadingIndicator();
getDataFrame(ajaxArgs)
.then((dataFrame) => {
packetsLock -= 1;
const componentStorage = dataSource.store();
dataFrame
.map((i) => ({
date: new Date(i.Date),
minTemp: i.MinTemp,
maxTemp: i.MaxTemp,
}))
.forEach((item) => componentStorage.insert(item));
dataSource.reload();
onVisualRangeChanged(visualRange, component);
})
.catch(() => {
packetsLock -= 1;
dataSource.reload();
});
}
};
const onVisualRangeChanged = (visualRange, component) => {
const items = component.getDataSource().items();
if (
!items.length
|| items[0].date - visualRange.startValue.getTime() >= HALFDAY
|| visualRange.endValue.getTime() - items[items.length - 1].date >= HALFDAY
) {
uploadDataByVisualRange(visualRange, component);
}
};
function getDataFrame(args) {
let params = '?';
params += `startVisible=${args.startVisible}
&endVisible=${args.endVisible}
&startBound=${args.startBound}
&endBound=${args.endBound}`;
return fetch(
`https://js.devexpress.com/Demos/WidgetsGallery/data/temperatureData${params}`,
).then((response) => response.json());
}
function getDateString(dateTime) {
return dateTime ? dateTime.toLocaleDateString('en-US') : '';
}
export default App;
import React, { useState } from 'react';
import DataSource from 'devextreme/data/data_source';
import {
Chart,
ZoomAndPan,
ScrollBar,
ArgumentAxis,
ValueAxis,
Title,
Label,
Font,
Legend,
Series,
Animation,
LoadingIndicator,
} from 'devextreme-react/chart';
const HALFDAY = 43200000;
let packetsLock = 0;
const chartDataSource = new DataSource({
store: [],
sort: 'date',
paginate: false,
});
const wholeRange = {
startValue: new Date(2017, 0, 1),
endValue: new Date(2017, 11, 31),
};
function App() {
const [visualRange, setVisualRange] = useState({
startValue: new Date(2017, 3, 1),
endValue: new Date(2017, 3, 15),
});
const handleChange = (e) => {
if (e.fullName === 'argumentAxis.visualRange') {
const stateStart = visualRange.startValue;
const currentStart = e.value.startValue;
if (stateStart.valueOf() !== currentStart.valueOf()) {
setVisualRange(e.value);
}
onVisualRangeChanged(e.value, e.component);
}
};
return (
<Chart
id="chart"
title="Temperature in Toronto (2017)"
dataSource={chartDataSource}
onOptionChanged={handleChange}
>
<ZoomAndPan argumentAxis="pan" />
<ScrollBar visible={true} />
<ArgumentAxis
argumentType="datetime"
visualRangeUpdateMode="keep"
visualRange={visualRange}
wholeRange={wholeRange}
/>
<ValueAxis
name="temperature"
allowDecimals={false}
>
<Title text="Temperature, °C">
<Font color="#ff950c" />
</Title>
<Label>
<Font color="#ff950c" />
</Label>
</ValueAxis>
<Series
color="#ff950c"
type="rangearea"
argumentField="date"
rangeValue1Field="minTemp"
rangeValue2Field="maxTemp"
name="Temperature range"
/>
<Animation enabled={false} />
<LoadingIndicator backgroundColor="none">
<Font size={14} />
</LoadingIndicator>
<Legend visible={false} />
</Chart>
);
}
const uploadDataByVisualRange = (visualRange, component) => {
const dataSource = component.getDataSource();
const storage = dataSource.items();
const ajaxArgs = {
startVisible: getDateString(visualRange.startValue),
endVisible: getDateString(visualRange.endValue),
startBound: getDateString(storage.length ? storage[0].date : null),
endBound: getDateString(storage.length ? storage[storage.length - 1].date : null),
};
if (
ajaxArgs.startVisible !== ajaxArgs.startBound
&& ajaxArgs.endVisible !== ajaxArgs.endBound
&& !packetsLock
) {
packetsLock += 1;
component.showLoadingIndicator();
getDataFrame(ajaxArgs)
.then((dataFrame) => {
packetsLock -= 1;
const componentStorage = dataSource.store();
dataFrame
.map((i) => ({
date: new Date(i.Date),
minTemp: i.MinTemp,
maxTemp: i.MaxTemp,
}))
.forEach((item) => componentStorage.insert(item));
dataSource.reload();
onVisualRangeChanged(visualRange, component);
})
.catch(() => {
packetsLock -= 1;
dataSource.reload();
});
}
};
const onVisualRangeChanged = (visualRange, component) => {
const items = component.getDataSource().items();
if (
!items.length
|| items[0].date - visualRange.startValue.getTime() >= HALFDAY
|| visualRange.endValue.getTime() - items[items.length - 1].date >= HALFDAY
) {
uploadDataByVisualRange(visualRange, component);
}
};
function getDataFrame(args) {
let params = '?';
params += `startVisible=${args.startVisible}
&endVisible=${args.endVisible}
&startBound=${args.startBound}
&endBound=${args.endBound}`;
return fetch(`https://js.devexpress.com/Demos/WidgetsGallery/data/temperatureData${params}`).then(
(response) => response.json(),
);
}
function getDateString(dateTime) {
return dateTime ? dateTime.toLocaleDateString('en-US') : '';
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'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',
'whatwg-fetch': 'npm:whatwg-fetch@2.0.4/fetch.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@24.1.7/cjs',
'devextreme-react': 'npm:devextreme-react@24.1.7/cjs',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.12/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/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/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// 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',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.13/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html>
<html 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" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.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.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
#chart {
height: 440px;
}