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Integration with Google Charts

Read this tutorial to learn how to integrate the WebDataRocks reporting tool with Google Charts.

Supported chart types

WebDataRocks supports the following chart types:

  1. Area (demo)
  2. Bar (demo)
  3. Column (demo)
  4. Line (demo)
  5. Pie (demo)
  6. Sankey (demo)

If you need a chart that is not on the list, you can implement a custom logic of data processing in the options.prepareDataFunction parameter of googlecharts.getData().

To start a new React data visualization project with WebDataRocks Pivot Table and Google Charts, follow the steps below.

Step 1. Add WebDataRocks to your project

Step 1.1. Complete the Quick start guide. Your code of the component with WebDatarocks should look similar to the following:

import * as WebDataRocksReact from "@webdatarocks/react-webdatarocks";

function App() {
  return (
    <div> 
      <WebDataRocksReact.Pivot
       toolbar={true}
      />
    </div>
  );
}

export default App;

Step 1.2. Create a report for WebDataRocks — connect to the data source and define which fields should be displayed in rows, columns, and measures:

function App() {
  const report = {
    dataSource: {
      filename: "https://cdn.webdatarocks.com/data/data.csv",
    },
    slice: {
      rows: [
        {
          uniqueName: "Country",
        },
      ],
      columns: [
        {
          uniqueName: "Measures",
        },
      ],
      measures: [
        {
          uniqueName: "Price",
          aggregation: "sum",
        },
      ],
    },
  };

  return (
    <div> 
      <WebDataRocksReact.Pivot
       toolbar={true}
       report={report}
      />
    </div>
  );
}

The fields you’ve specified in the report will be shown on the chart.

Step 2. Get a reference to the WebDataRocks instance

Some of WebDataRocks methods and events are needed to create a chart. Using a reference to the WebDataRocks instance, we can access WebDataRocks API.

Get the reference with the useRef hook:

React + ES6

// ...
import { useRef } from "react";

function App() {
  const pivotRef = useRef(null);

  // ...

  return (
    <div> 
      <WebDataRocksReact.Pivot
       ref={pivotRef}
       toolbar={true}
       report={report}
      />
    </div>
  );
}

export default App;

React + TypeScript

// ...
import { RefObject, useRef} from "react";

function App() {
  const pivotRef: RefObject<WebDataRocksReact.Pivot> = useRef<WebDataRocksReact.Pivot>(null);

  // ...

  return (
    <div> 
      <WebDataRocksReact.Pivot
       ref={pivotRef}
       toolbar={true}
       report={report}
      />
    </div>
  );
}

export default App;

Now it’s possible to interact with the component through pivotRef.current.webdatarocks.

Step 3. Add Google Charts

Step 3.1. Download the Google Charts wrapper for React:

npm install react-google-charts

Step 3.2. Import Google Charts into your component:

import { Chart } from "react-google-charts";

Step 3.3. Now you can add a chart to your component. Let’s create a column chart:

return (
  <div> 
    <WebDataRocksReact.Pivot
     ref={pivotRef}
     toolbar={true}
     report={report}
    />
    <Chart
     chartType="ColumnChart"
    />
  </div>
);

If you run the project now, the chart won’t show any data because WebDataRocks is not integrated with Google Charts yet. We will connect them in the next step.

Step 4. Show the data from the pivot table on the chart

Step 4.1. Create a state variable to store data for the chart (e.g., chartData):

import { useState, /* Other imports */ } from "react";

function App() {
  // ...
  const [chartData, setChartData] = useState([]);
  // ...
}

The chartData variable is now empty, but soon we’ll fill it with data from our component.

Step 4.2. Import the WebDataRocks Connector for Google Charts:

import "@webdatarocks/webdatarocks/webdatarocks.googlecharts.js";

The Connector provides the googlecharts.getData() method, which gets data from WebDataRocks and converts it to the format required for a specific chart type.

Step 4.3. If we call the googlecharts.getData() method before WebDataRocks is fully loaded, it will return an empty result. To know when WebDataRocks is ready to provide data for the chart, handle the reportcomplete event:

React + ES6

const onReportComplete = () => {
  // Unsubscribing from reportcomplete
  // We need it only to track the initialization of WebDataRocks 
  pivotRef.current.webdatarocks.off("reportComplete");
  createChart();
};

return (
  <div> 
    <WebDataRocksReact.Pivot
     ref={pivotRef}
     toolbar={true}
     report={report}
     reportcomplete={onReportComplete}
    />
    <Chart
     chartType="ColumnChart"
    />
  </div>
);

React + TypeScript

const onReportComplete = () => {
  // Unsubscribing from reportcomplete
  // We need it only to track the initialization of WebDataRocks 
  pivotRef.current?.webdatarocks.off("reportComplete");
  createChart();
};

return (
  <div> 
    <WebDataRocksReact.Pivot
     ref={pivotRef}
     toolbar={true}
     report={report}
     reportcomplete={onReportComplete}
    />
    <Chart
     chartType="ColumnChart"
    />
  </div>
);

Now the chart will be created only when the data is loaded and the report is ready. 

Step 4.4. Implement the createChart() function. It will use the googlecharts.getData() method from the Connector:

React + ES6

const createChart = () => {  
  pivotRef.current.webdatarocks.googlecharts.getData(
    {
      type: "column",
    },
    // Function called when data for the chart is ready
    (chartConfig) => setChartData(chartConfig.data),
    // Function called on report changes (filtering, sorting, etc.) 
    (chartConfig) => setChartData(chartConfig.data),
  );
};

React + TypeScript

const createChart = () => {  
  pivotRef.current?.webdatarocks.googlecharts.getData(
    {
      type: "column",
    },
    // Function called when data for the chart is ready
    (chartConfig: any) => setChartData(chartConfig.data),
    // Function called on report changes (filtering, sorting, etc.) 
    (chartConfig: any) => setChartData(chartConfig.data),
  );
};

Notice the type configuration — it must correspond to the chartType specified in step 3.3 (in our case, the type value is "column").

As you can see, here we are using the chartData’s setter setChartData(). Each time the chartData’s value is updated, the chart will be re-rendered. As a result, all your changes to the WebDataRocks report will be reflected on the chart.

Step 4.5. Finally, pass the data to the chart:

<Chart
 chartType="ColumnChart"
 data={chartData}
/>

Step 5. Run the project

Run your project with the following command:

npm run dev

Open http://localhost:5173/ in the browser to see how the pivot table looks in combination with Google Charts.

Now try experimenting: filter the data, change the measures and the aggregation functions, and see how the results are reflected on the chart.

To learn more about configurations available for Google Charts, please refer to the Google Charts documentation.

Check out the full code

After completing this tutorial, the full code of the component should look as follows:

React + ES6

import * as WebDataRocksReact from "@webdatarocks/react-webdatarocks";
import { useRef, useState } from "react";
import { Chart } from "react-google-charts";
import "@webdatarocks/webdatarocks/webdatarocks.googlecharts.js";

function App() {
  const pivotRef = useRef(null);
  const [chartData, setChartData] = useState([]);

  const report = {
    dataSource: {
      filename: "https://cdn.webdatarocks.com/data/data.csv"
    },
    slice: {
      rows: [
        {
          uniqueName: "Country",
        },
      ],
      columns: [
        {
          uniqueName: "Measures",
        },
      ],
      measures: [
        {
          uniqueName: "Price",
          aggregation: "sum",
        },
      ],
    },
  };

  const onReportComplete = () => {
    // Unsubscribing from reportcomplete
    // We need it only to track the initialization of WebDataRocks
    pivotRef.current.webdatarocks.off("reportComplete");
    createChart();
  };

  const createChart = () => {
    pivotRef.current.webdatarocks.googlecharts.getData(
      {
        type: "column",
      },
      // Function called when data for the chart is ready
      (chartConfig) => setChartData(chartConfig.data),
      // Function called on report changes (filtering, sorting, etc.)
      (chartConfig) => setChartData(chartConfig.data),
    );
  };

  return (
    <div>
      <WebDataRocksReact.Pivot
       ref={pivotRef} 
       toolbar={true}
       report={report}
       reportcomplete={onReportComplete}
      />
      <Chart
       chartType="ColumnChart"
       data={chartData}
      />
    </div>
  );
}

export default App;

React + TypeScript

import * as WebDataRocksReact from "@webdatarocks/react-webdatarocks";
import { RefObject, useRef, useState } from "react";
import { Chart } from "react-google-charts";
import "@webdatarocks/webdatarocks/webdatarocks.googlecharts.js";

function App() {
  const pivotRef: RefObject<WebDataRocksReact.Pivot> = useRef<WebDataRocksReact.Pivot>(null);
  const [chartData, setChartData] = useState([]);

  const report = {
    dataSource: {
      filename: "https://cdn.webdatarocks.com/data/data.csv"
    },
    slice: {
      rows: [
        {
          uniqueName: "Country",
        },
      ],
      columns: [
        {
          uniqueName: "Measures",
        },
      ],
      measures: [
        {
          uniqueName: "Price",
          aggregation: "sum",
        },
      ],
    },
  };

  const onReportComplete = () => {
    // Unsubscribing from reportcomplete
    // We need it only to track the initialization of WebDataRocks 
    pivotRef.current?.webdatarocks.off("reportComplete");
    createChart();
  };

  const createChart = () => {  
    pivotRef.current?.webdatarocks.googlecharts.getData(
      {
        type: "column",
      },
      // Function called when data for the chart is ready
      (chartConfig: any) => setChartData(chartConfig.data),
      // Function called on report changes (filtering, sorting, etc.) 
      (chartConfig: any) => setChartData(chartConfig.data),
    );
  };
  
  return (
    <div>
      <WebDataRocksReact.Pivot 
       ref={pivotRef}
       toolbar={true}
       report={report}
       reportcomplete={onReportComplete}
      />
      <Chart
       chartType="ColumnChart"
       data={chartData}
      />
    </div>
  );
}

export default App;

See also