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  1. API reference
  2. Welcome
    1. Component overview
    2. Quick start
    3. System requirements
    4. Troubleshooting
    5. Managing license keys
    6. Migrating from WebDataRocks to Flexmonster
  3. Integration with frameworks
    1. Available tutorials
    2. Integration with Angular
    3. Integration with React
    4. Integration with Vue
    5. Integration with Python
      1. Integration with Django
      2. Integration with Jupyter Notebook
    6. Integration with React Native
    7. Integration with AngularJS (v1.x)
    8. Integration with TypeScript
    9. Integration with R Shiny
    10. Integration with jQuery
    11. Integration with Ionic
    12. Integration with Electron.js
    13. Integration with Webpack
    14. Integration with RequireJS
  4. Connecting to Data Source
    1. JSON
      1. Connecting to JSON
      2. Connecting to JSON using Flexmonster Data Server
      3. Data types in JSON
    2. CSV
      1. Connecting to CSV
      2. Connecting to CSV using Flexmonster Data Server
      3. Data types in CSV
    3. Database
      1. Connecting to SQL databases
      2. Connecting to a MySQL database
      3. Connecting to a Microsoft SQL Server database
      4. Connecting to a PostgreSQL database
      5. Connecting to an Oracle database
      6. Connecting to other databases
    4. Flexmonster Data Server
      1. Getting started with Flexmonster Data Server
      2. Installation guide
      3. Configurations reference
      4. Data sources guide
      5. Security and authorization guide
      6. The Data Server as a DLL
        1. Getting started with the Data Server as a DLL
        2. Referring the Data Server as a DLL
        3. Implementing the API controller
        4. Implementing the server filter
        5. Implementing the custom parser
        6. DLL configurations reference
        7. The controller's methods for request handling
    5. MongoDB
      1. Introduction to Flexmonster MongoDB Connector
      2. Getting started with the MongoDB Connector
      3. Embedding the MongoDB Connector into the server
    6. Microsoft Analysis Services
      1. Connecting to Microsoft Analysis Services
      2. Getting started with the Accelerator
      3. Installing the Accelerator as a Windows service
      4. Referring the Accelerator as a DLL
      5. Configuring the authentication process
      6. Configuring a secure HTTPS connection
      7. Troubleshooting
    7. Custom data source API
      1. Introduction to the custom data source API
      2. A quick overview of a sample Node.js server
      3. A quick overview of a sample .NET Core server
      4. Implementing the custom data source API server
      5. Implementing filters
      6. Supporting more aggregation functions
      7. Returning data for the drill-through view
    8. Elasticsearch
      1. Connecting to Elasticsearch
      2. Configuring the mapping
    9. Pentaho Mondrian
      1. Connecting to Pentaho Mondrian
      2. Getting started with the Accelerator
      3. Configuring Mondrian roles
      4. Configuring username/password protection
      5. Configuring a secure HTTPS connection
      6. Troubleshooting
  5. Security
    1. Security in Flexmonster
    2. Security aspects of connecting to an OLAP cube
      1. Ways of connecting to an OLAP cube
      2. The data transfer process
      3. Data security
      4. Data access management
  6. Configuring report
    1. What is a report
    2. Data source
    3. Slice
    4. Options
    5. Mapping
    6. Number formatting
    7. Conditional formatting
    8. Set the report for the component
    9. Get the report from the component
    10. Date and time formatting
    11. Configuring global options
    12. Export and print
    13. Calculated values
    14. Custom sorting
  7. Charts
    1. Available tutorials
    2. Flexmonster Pivot Charts
    3. Integration with Highcharts
    4. Integration with Google Charts
    5. Integration with FusionCharts
    6. Integration with any charting library
  8. Customizing
    1. Customizing the Toolbar
    2. Customizing appearance
    3. Customizing the context menu
    4. Customizing the grid
    5. Customizing the pivot charts
    6. Localizing the component
  9. Updating to the latest version
    1. Updating to the latest version
    2. Release notes
    3. Migration guide from 2.7 to 2.8
    4. Migration guide from 2.6 to 2.7
    5. Migration guide from 2.5 to 2.6
    6. Migration guide from 2.4 to 2.5
    7. Migration guide from 2.3 to 2.4
    8. Migration guide from 2.2 to 2.3
    9. Documentation for older versions
Table of contents

Customizing the pivot charts

Flexmonster Pivot Charts can be customized and adjusted to the user’s needs. The customizeChartElement API call allows setting colors for chart elements, adding custom attributes, and so on.

This guide contains the following sections:

About the customizeChartElement method

The customizeChartElement method is triggered for each chart element during the rendering. As a parameter, it takes customizeChartElementFunction which has two parameters:

  • either the HTML or SVG element, which contains the current representation of the chart element and through which the element’s representation can be customized.
  • the Chart Data Object or the Chart Legend Data Object containing information about the chart element.

To learn more about the customizeChartElement API call and its parameters, refer to the documentation.

Using customizeChartElement

This example illustrates how to highlight the chart elements containing info about the United States regardless of their position:

  1. Create a function to check whether the data contains the given member:
    function contains(data, memberName) {
    if (data && data.rows) {
      for (let i = 0; i < data.rows.length; i++) {
        if (data.rows[i].uniqueName == memberName) {
          return true;
     if (data && data.columns) {
      for (let i = 0; i < data.columns.length; i++) {
        if (data.columns[i].uniqueName == memberName) {
          return true;
     return false;
  2. By default, all the hierarchy’s child members have their own color shade when the chart is expanded. We will create a function to prepare a custom shade for each child member of the United States. This function will retrieve a lightness of the element’s default color, apply it to the custom color, and return a resulting shade:
    function applyShade(newColor, oldColor) {
      /* Get the lightness of the default color */
      /* Here we divide it by 2 to adjust the default lightness
    and get a darker color as a result */
      let colorLightness = tinycolor(oldColor).toHsl().l/2;
      /* Apply the lightness to the new color */
      let result = newColor.toHsl();
      result.l = colorLightness;
      /* Return the created color shade */
      return tinycolor(result);
    This function uses the TinyColor library for color conversions, so include the library into your project with the following script:
  3. If the data contains the United States member, color the corresponding chart element with a certain shade of purple:
    function customizeChartElementFunction(element, data) {
    let newColor = tinycolor("#1a0019");
    if (contains(data, "country.[united states]")) {
    if (data.chartType == "pie") {
    if (element.querySelector('path')) {
    element.querySelector('path').style.fill = applyShade(newColor,
    else { = applyShade(newColor,
    Note: the pie chart should be handled separately as it has a different structure of chart elements.
  4. Update the chart legend item’s color:
    function customizeChartElementFunction(element, data) {
    // code from step 2
    if (data && data.type == 'legend') {
    if (data.member && data.member.uniqueName == "country.[united states]"
    && !data.isExpanded) {
    .backgroundColor = applyShade(newColor, data.color).toHexString();
    if (data.tuple && isChild(data.tuple, data.member.uniqueName,
    "country.[united states]") && !data.isExpanded) {
    .backgroundColor = applyShade(newColor, data.color).toHexString();

The isChild function checks whether the current member is a child of the given member (in our case, of the United States member). Its definition is the following:

function isChild(tuple, member, parentMember) {
let i = 0;
   while (tuple[i].uniqueName != member) {
    if (tuple[i].uniqueName == parentMember) {
        return true;
   return false;

See the full example on JSFiddle.

What’s next?

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