Create a Chart in React Native

FusionTime is a JavaScript charting library that helps you visualize, and explore time-series data. In FusionTime, you get lots of out-of-the-box interactive features, such as time navigator, date range selectors, tooltips with crosslines, interactive legend and more. These features enhance the experience of exploring and understanding time-series data

We have built a simple react-native-fusioncharts component, which provides bindings for FusionTime. The react-native-fusioncharts component allows you to easily add interactive time-series charts to any React Native project.

In this page, we'll see how to install FusionTime and render an interactive time-series chart using the react-native-fusioncharts component.

Installation

Since FusionTime is distributed along with FusionCharts Suite, download/install the FusionCharts package to get access to FusionTime and other chart types of the FusionCarts Suite. To install follow the steps below:

$ mkdir projectNameCOPY

$ cd projectNameCOPY

    $ npm install react-native-fusioncharts --save
COPY

    $ npm install fusioncharts --save
COPY

$ mkdir projectNameCOPY

$ cd projectNameCOPY

    $ npm install react-native-fusioncharts --save
COPY

    $ npm install fusioncharts --save
COPY

Create Your First Chart

Let's create a time-series chart using react-native-fusioncharts component showing Online sales of a SuperStore.

The chart will look as shown below:

The data for the above chart is too big to be displayed here. The table below shows the sample data of the above chart:

FusionTime accepts a DataTable as the data source. DataTable is the tabular representation of data. To create the DataTable, you need to provide the following:

• schema - which defines the properties of the columns.
• data - which contains the values of each row and column of the DataTable.

For an instance of FusionTime, you can create n number of DataTables, but only one DataStore.

Now, let's learn how to prepare the schema and the data of the DataTable.

Create the schema

The schema outlines each column represented in the above table. The schema contains an array which has multiple objects created in it. Each object represents a column of the above table.

name and type are mandatory keys for each object. If the object type is time then format is also a mandatory key.

To define the schema, let's create a schema.json file and copy the following code:

It is not mandatory to create the schema in a different .json file. You can also define the schema within the .html file.

[{
    "name": "Time",
    "type": "date",
    "format": "%-m/%-d/%Y"
}, {
    "name": "Sales",
    "type": "number"
}]COPY

In the above code:

• schema is the variable in which the array is stored.
• Each object of a schema maps to a column of the tabular representation of the data.
• The JSON object has the following attributes:
  • name - Specify the name of the column of the tabular representation of data
  • type - Specify the type of the column.
  • format - Specify the input format of the date as per your data. In this example, the format is %-m/%-d/%Y. To know more on date formats click here.

Now that we have the schema ready, let's work on the data.

Create data

Data can be provided either in JSON format or 2D array format. We will use the 2D array format.

Data for the above chart is too big to be shown here. A sample of it has been used in the data object defined below:

var data = [
    [
        "1/4/2011",
        16.448
    ],
    [
        "1/5/2011",
        272.736
    ],
    [
        "1/5/2011",
        11.784
    ],
    [
        "1/5/2011",
        3.54
    ],
    [
        "1/6/2011",
        19.536
    ],
    [
        "1/7/2011",
        2573.82
    ],
]COPY

Create a new data.json file, and copy the above code there. Next, copy the entire data and replace it with the content of the data object in your 'data.json' file.

It is not mandatory to create a data.json file. You can also do the same in your HTML file.

In the above code:

• data is the variable in which the data array is stored.
• Each object in the data array corresponds to a row in the tabular representation of the data.
• Each element in an object is represented by each object of the schema. The values in each object of the array represent the following:
  • Time according to the format
  • Total sales amount

We are all set with our data to create the chart.

By default, FusionTime applies the average function to aggregate the data and display on the chart. You can change the aggregate function from average to any other numeric calculation. To know more, click here.

Now, let's create the files to render the above chart.

Render the chart

To render the chart, create a app.js file and copy the following code:

The JavaScript code to create a chart in Android and iOS is same.

import React, { Component } from "react";
import { Platform, StyleSheet, Text, View } from "react-native";
import FusionCharts from "react-native-fusioncharts";

export default class PlainColumn2D extends Component {
    constructor(props) {
        super(props);

        this.state = {
            timeseriesDs: {
                type: 'timeseries',
                renderAt: 'container',
                width: '600',
                height: '400',
                dataSource: {
                    caption: { text: 'Online Sales of a SuperStore in the US' },
                    data: null,
                    yAxis: [{
                        plot: [{
                            value: 'Sales ($)'
                        }]
                    }]
                }
            }
        };
        this.libraryPath = Platform.select({
            // Specify fusioncharts.html file location
            android: {
                uri: "file:///android_asset/fusioncharts.html"
            },
            ios: require("./assets/fusioncharts.html")
        });
    }

    componentDidMount() {
        this.fetchDataAndSchema();
    }

    fetchDataAndSchema() {
        const jsonify = res => res.json();
        const dFetch = fetch(
        'https://raw.githubusercontent.com/fusioncharts/dev_centre_docs/master/assets/datasources/fusiontime/integrations-react-native/data.json'
        ).then(jsonify);
        // This is the remote url to fetch the schema.
        const sFetch = fetch(  'https://raw.githubusercontent.com/fusioncharts/dev_centre_docs/master/assets/datasources/fusiontime/integrations-react-native/schema.json'
        ).then(jsonify);
        Promise.all([dFetch, sFetch]).then(res => {
            const data = res[0];
            const schema = res[1];
            console.log(data);
            console.log(schema);
            this.setState({ dataJson: data, schemaJson: schema });
        });
    }

    render() {
        return (
            <View style={styles.container}>
                <Text style={styles.header}>FusionCharts Integration with React Native</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
                />
                </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
    }
});COPY

In the above code:

1. Include react

2. Include react-native-fusioncharts component

3. Define the chart configuration in a JSON.

   • Set the chart type as column2d. Each chart type is represented with a unique chart alias. For Column 2D chart, the alias is column2d. Find the complete list of chart types with their respective alias here.
   • Set the width and height (in pixels).
   • Set the dataFormat as JSON.
   • Embed the json data as the value of the dataSource.

4. Specify the location of fusioncharts.html for Android and iOS.

5. Add style to the container of the chart.