Change Chart Type at Runtime
FusionCharts Suite XT includes advanced features that let you add more context to your chart and make data visualization simpler. These features include chart updates, update chart type at runtime, and events.
This article focuses on how you can change the chart type of the chart at runtime using react-native-fusioncharts component. The chart types used in the sample is:
- Column 2D
- Bar 2D
- Pie 2D
A chart configured to change the chart type, is shown below:
FusionCharts will load here..
{
"chart": {
"caption": "Countries With Most Oil Reserves [2017-18]",
"subCaption": "In MMbbl = One Million barrels",
"xAxisName": "Country",
"yAxisName": "Reserves (MMbbl)",
"numberSuffix": "K",
"theme": "fusion"
},
"data": [
{
"label": "Venezuela",
"value": "290"
},
{
"label": "Saudi",
"value": "260"
},
{
"label": "Canada",
"value": "180"
},
{
"label": "Iran",
"value": "140"
},
{
"label": "Russia",
"value": "115"
},
{
"label": "UAE",
"value": "100"
},
{
"label": "US",
"value": "30"
},
{
"label": "China",
"value": "30"
}
]
}The full code of the above sample is given below:
import React, { Component } from 'react';
import { Platform, StyleSheet, Text, View, Button, Alert } from 'react-native';
import FusionCharts from 'react-native-fusioncharts';
export default class ChartRunTime extends Component {
constructor(props) {
super(props);
this.apiCaller = null;
this.state = {
type: 'column2d',
width: '700',
height: '400',
dataFormat: 'json',
chartType: '',
dataSource: {
type: "column2d", // The chart types
width: "700", // Width of the chart
height: "400", // Height of the chart
dataFormat: "json", // Data type
dataSource: {
// Chart Configuration
"chart": {
"caption": "Countries With Most Oil Reserves [2017-18]",
"subCaption": "In MMbbl = One Million barrels",
"xAxisName": "Country",
"yAxisName": "Reserves (MMbbl)",
"numberSuffix": "K",
"theme": "fusion",
},
// Chart Data
"data": [{
"label": "Venezuela",
"value": "290"
}, {
"label": "Saudi",
"value": "260"
}, {
"label": "Canada",
"value": "180"
}, {
"label": "Iran",
"value": "140"
}, {
"label": "Russia",
"value": "115"
}, {
"label": "UAE",
"value": "100"
}, {
"label": "US",
"value": "30"
}, {
"label": "China",
"value": "30"
}]
}
};
this.libraryPath = Platform.select({
// Specify fusioncharts.html file location
android: { uri: 'file:///android_asset/fusioncharts.html' },
ios: require('./assets/fusioncharts.html')
});
}
changeType(type) {
this.setState({ chartType: type }, () => {
this.apiCaller(`window.chartObj.chartType('${type}')`);
});
}
render() {
return (
<View style={styles.container}>
<Text style={styles.header}>Change chart type at runtime</Text>
<View style={styles.chartContainer}>
<FusionCharts
type={this.state.type}
width={this.state.width}
height={this.state.height}
dataFormat={this.state.dataFormat}
dataSource={this.state.dataSource}
libraryPath={this.libraryPath} // set the libraryPath property
onInitialized={caller => {
this.apiCaller = caller;
if (this.state.chartType === '')
this.setState({ chartType: this.state.type });
}}
/>
</View>
<Text style={styles.info}>Press button to change chart type</Text>
<View style={styles.buttonContainer}>
<Button
disabled={
this.state.chartType === '' || this.state.chartType == 'column2d'
}
style={{ margin: 8 }}
title="Column2D"
onPress={() => this.changeType('column2d')}
/>
<Button
disabled={
this.state.chartType === '' || this.state.chartType == 'pie2d'
}
title="Pie2D"
onPress={() => this.changeType('pie2d')}
/>
<Button
disabled={
this.state.chartType === '' || this.state.chartType == 'bar2d'
}
title="Bar2D"
onPress={() => this.changeType('bar2d')}
/>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
padding: 10
},
header: {
fontWeight: 'bold',
fontSize: 20,
textAlign: 'center',
paddingBottom: 10
},
chartContainer: {
height: 400,
borderColor: '#000',
borderWidth: 1
},
buttonContainer: {
padding: 10,
display: 'flex',
justifyContent: 'space-around',
flexDirection: 'row',
alignItems: 'center'
},
info: {
fontSize: 16,
textAlign: 'center',
marginTop: 5
}
});The above chart has been rendered using the following steps:
Include the necessary libraries and components using
import. For example,react-native-fusioncharts,fusioncharts, etc.Define the chart configuration in a JSON object. In the JSON object:
- Set the chart type as
column2d. Find the complete list of chart types with their respective alias here . - Set the width and height of the chart in pixels.
- Set the
dataFormatas JSON. - Embed the json data as the value of
dataSource.
- Set the chart type as
Specify the location of
fusioncharts.htmlfor Android and iOS.Create a function to update the chart type at runtime.
Add the
render()function to create the radio buttons.Add
styleto the container of the chart.
The HTML template(fusioncharts.html) of the above sample is:
<!DOCTYPE html>
<html>
<head>
<title>FusionCharts</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body,
html {
margin: 0;
padding: 0;
overflow: hidden;
font-size: 13px;
}
#chart-container {
width: 100%;
height: 100%;
top: 0;
left: 0;
right: 0;
bottom: 0;
position: absolute;
user-select: none;
-webkit-user-select: none;
overflow: hidden;
}
#loading-text {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
-webkit-transform: translate(-50%, -50%);
user-select: none;
-webkit-user-select: none;
}
</style>
</head>
<body>
<div id="chart-container">
<div id="loading-text">
Chart is loading...
</div>
</div>
<script type='text/javascript'>
"use strict";
(function() {
var a = Promise.resolve(),
b = {},
c = {};
(function d() {
var f = function() {
function g() {
return Math.floor(65536 * (1 + Math.random())).toString(16).substring(1)
}
return g() + g() + "-" + g() + "-" + g() + "-" + g() + "-" + g() + g() + g()
};
window.webViewBridge = {
send: function send(g, h, i, j) {
i = i || function() {}, j = j || function() {};
var k = {
targetFunc: g,
data: h || {},
msgId: f()
},
l = JSON.stringify(k);
a = a.then(function() {
return new Promise(function(m, n) {
b[k.msgId] = {
resolve: m,
reject: n
}, c[k.msgId] = {
onsuccess: i,
onerror: j
}, window.postMessage(l)
})
}).catch(function() {})
}
}, window.document.addEventListener("message", function(g) {
var h;
try {
h = JSON.parse(g.data)
} catch (i) {
return
}
b[h.msgId] && (b[h.msgId].resolve(), delete b[h.msgId]), h.args && c[h.msgId] && (h.isSuccessfull ? c[h.msgId].onsuccess.apply(null, h.args) : c[h.msgId].onerror.apply(null, h.args), delete c[h.msgId])
})
})()
})();
</script>
<!-- Include the required FusionCharts modules -->
<script type='text/javascript' src="fusioncharts/fusioncharts.js"></script>
<script type='text/javascript' src="fusioncharts/fusioncharts.charts.js"></script>
<script type='text/javascript' src="fusioncharts/themes/fusioncharts.theme.fusion.js"></script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<!-- Include the required FusionCharts modules -->
<script type='text/javascript' src="fusioncharts/fusioncharts.js"></script>
<script type='text/javascript' src="fusioncharts/fusioncharts.charts.js"></script>
<script type='text/javascript' src="fusioncharts/themes/fusioncharts.theme.fusion.js"></script>
</head>
<body></body>
</html>
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