Backend API
import React, { useCallback, useState } from 'react';
import {
LinearGauge, Title, Font, Geometry, Scale, RangeContainer, Range, ValueIndicator, Label,
} from 'devextreme-react/linear-gauge';
import { SelectBox, type SelectBoxTypes } from 'devextreme-react/select-box';
import { cities, cityLabel } from './data.ts';
const customTicks = [900, 1000, 1020, 1100];
const temperatureGaugeStartValue = -40;
const pressureLabelFormat = {
type: 'decimal',
};
function App() {
const [selectBoxValue, setSelectBoxValue] = useState(cities[0].data);
const [temperature, setTemperature] = useState(cities[0].data.temperature);
const [humidity, setHumidity] = useState(cities[0].data.humidity);
const [pressure, setPressure] = useState(cities[0].data.pressure);
const onSelectionChanged = useCallback((e: SelectBoxTypes.SelectionChangedEvent) => {
const weatherData = e.selectedItem.data;
setSelectBoxValue(weatherData);
setTemperature(weatherData.temperature);
setHumidity(weatherData.humidity);
setPressure(weatherData.pressure);
}, [setSelectBoxValue, setTemperature, setHumidity, setPressure]);
return (
<div>
<div className="long-title">
<h3>Weather Indicators</h3>
</div>
<div id="gauge-demo">
<LinearGauge
className="gauge-element"
value={temperature}
>
<Title text="Temperature (°C)">
<Font size={16} />
</Title>
<Geometry orientation="vertical" />
<Scale startValue={temperatureGaugeStartValue} endValue={40} tickInterval={40} />
<RangeContainer backgroundColor="none">
<Range startValue={temperatureGaugeStartValue} endValue={0} color="#679EC5" />
<Range startValue={0} endValue={40} />
</RangeContainer>
</LinearGauge>
<LinearGauge
className="gauge-element"
value={humidity}
>
<Title text="Humidity (%)">
<Font size={16} />
</Title>
<Geometry orientation="vertical" />
<Scale startValue={0} endValue={100} tickInterval={10} />
<RangeContainer backgroundColor="#CACACA" />
<ValueIndicator type="rhombus" color="#A4DDED" />
</LinearGauge>
<LinearGauge
className="gauge-element"
value={pressure}
>
<Title text="Barometric Pressure (mb)">
<Font size={16} />
</Title>
<Geometry orientation="vertical" />
<Scale startValue={900} endValue={1100} customTicks={customTicks}>
<Label format={pressureLabelFormat} />
</Scale>
<RangeContainer>
<Range startValue={900} endValue={1000} color="#679EC5" />
<Range startValue={1000} endValue={1020} color="#A6C567" />
<Range startValue={1020} endValue={1100} color="#E18E92" />
</RangeContainer>
<ValueIndicator type="circle" color="#E3A857" />
</LinearGauge>
</div>
<SelectBox
dataSource={cities}
valueExpr="data"
inputAttr={cityLabel}
value={selectBoxValue}
displayExpr="name"
onSelectionChanged={onSelectionChanged}
/>
</div>
);
}
export default App;
import React, { useCallback, useState } from 'react';
import {
LinearGauge,
Title,
Font,
Geometry,
Scale,
RangeContainer,
Range,
ValueIndicator,
Label,
} from 'devextreme-react/linear-gauge';
import { SelectBox } from 'devextreme-react/select-box';
import { cities, cityLabel } from './data.js';
const customTicks = [900, 1000, 1020, 1100];
const temperatureGaugeStartValue = -40;
const pressureLabelFormat = {
type: 'decimal',
};
function App() {
const [selectBoxValue, setSelectBoxValue] = useState(cities[0].data);
const [temperature, setTemperature] = useState(cities[0].data.temperature);
const [humidity, setHumidity] = useState(cities[0].data.humidity);
const [pressure, setPressure] = useState(cities[0].data.pressure);
const onSelectionChanged = useCallback(
(e) => {
const weatherData = e.selectedItem.data;
setSelectBoxValue(weatherData);
setTemperature(weatherData.temperature);
setHumidity(weatherData.humidity);
setPressure(weatherData.pressure);
},
[setSelectBoxValue, setTemperature, setHumidity, setPressure],
);
return (
<div>
<div className="long-title">
<h3>Weather Indicators</h3>
</div>
<div id="gauge-demo">
<LinearGauge
className="gauge-element"
value={temperature}
>
<Title text="Temperature (°C)">
<Font size={16} />
</Title>
<Geometry orientation="vertical" />
<Scale
startValue={temperatureGaugeStartValue}
endValue={40}
tickInterval={40}
/>
<RangeContainer backgroundColor="none">
<Range
startValue={temperatureGaugeStartValue}
endValue={0}
color="#679EC5"
/>
<Range
startValue={0}
endValue={40}
/>
</RangeContainer>
</LinearGauge>
<LinearGauge
className="gauge-element"
value={humidity}
>
<Title text="Humidity (%)">
<Font size={16} />
</Title>
<Geometry orientation="vertical" />
<Scale
startValue={0}
endValue={100}
tickInterval={10}
/>
<RangeContainer backgroundColor="#CACACA" />
<ValueIndicator
type="rhombus"
color="#A4DDED"
/>
</LinearGauge>
<LinearGauge
className="gauge-element"
value={pressure}
>
<Title text="Barometric Pressure (mb)">
<Font size={16} />
</Title>
<Geometry orientation="vertical" />
<Scale
startValue={900}
endValue={1100}
customTicks={customTicks}
>
<Label format={pressureLabelFormat} />
</Scale>
<RangeContainer>
<Range
startValue={900}
endValue={1000}
color="#679EC5"
/>
<Range
startValue={1000}
endValue={1020}
color="#A6C567"
/>
<Range
startValue={1020}
endValue={1100}
color="#E18E92"
/>
</RangeContainer>
<ValueIndicator
type="circle"
color="#E3A857"
/>
</LinearGauge>
</div>
<SelectBox
dataSource={cities}
valueExpr="data"
inputAttr={cityLabel}
value={selectBoxValue}
displayExpr="name"
onSelectionChanged={onSelectionChanged}
/>
</div>
);
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
export const cities = [{
name: 'London',
id: '1',
data: {
temperature: 10,
humidity: 81,
pressure: 1002.1,
},
}, {
name: 'Berlin',
id: '2',
data: {
temperature: 14,
humidity: 58,
pressure: 1008.5,
},
}, {
name: 'New York',
id: '3',
data: {
temperature: 3,
humidity: 89,
pressure: 1016.2,
},
}, {
name: 'Moscow',
id: '4',
data: {
temperature: 2,
humidity: 51,
pressure: 1016.5,
},
}, {
name: 'Bangkok',
id: '5',
data: {
temperature: 37,
humidity: 39,
pressure: 1007.0,
},
}];
export const cityLabel = { 'aria-label': 'City' };
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
export const cities = [
{
name: 'London',
id: '1',
data: {
temperature: 10,
humidity: 81,
pressure: 1002.1,
},
},
{
name: 'Berlin',
id: '2',
data: {
temperature: 14,
humidity: 58,
pressure: 1008.5,
},
},
{
name: 'New York',
id: '3',
data: {
temperature: 3,
humidity: 89,
pressure: 1016.2,
},
},
{
name: 'Moscow',
id: '4',
data: {
temperature: 2,
humidity: 51,
pressure: 1016.5,
},
},
{
name: 'Bangkok',
id: '5',
data: {
temperature: 37,
humidity: 39,
pressure: 1007.0,
},
},
];
export const cityLabel = { 'aria-label': 'City' };
<!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/26.1.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="./bundle.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
<script src="bundles/vendor/react.vendor.js"></script>
<script src="./bundle.js"></script>
</body>
</html>
#gauge-demo {
width: 90%;
margin: 0 auto;
}
#gauge-demo .gauge-element {
height: 400px;
width: 33%;
float: left;
}
.dx-selectbox {
margin: 10px auto 0;
width: 200px;
}
#gauge-demo::after {
content: ".";
display: block;
clear: both;
visibility: hidden;
line-height: 0;
height: 0;
}
.long-title h3 {
font-weight: 200;
font-size: 28px;
text-align: center;
margin-bottom: 20px;
}