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. 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 FusionCharts from 'fusioncharts';
import Charts from 'fusioncharts/fusioncharts.charts';
import FusionTheme from 'fusioncharts/themes/fusioncharts.theme.fusion';

// Add the chart and theme as dependency
FusionCharts.addDep(Charts);
FusionCharts.addDep(FusionTheme);

// Create an Instance with chart options
var chartInstance = new FusionCharts({
    type: 'column2d',
    height: '400',
    width: '700',
    dataFormat: 'json',
    renderAt: 'chart-container',
    dataSource: {
        "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"
        }],
    },
    "events": {
        "beforeRender": function(e, d) {
            var container = e.data.container;
            // Change the sizes according to your need
            var options = {
                'column2d': 'column2d',
                'bar2d': 'bar2d',
                'pie2d': 'pie2d'
            };
            var chartSelected = 'column2d';

            function instantiate() {
                // Create option containers
                var parent = container.parentNode;

                var optionsContainer = document.createElement('div');
                optionsContainer.id = 'config-container';

                var spanLabel = document.createElement('span');
                spanLabel.id = 'select-text';
                spanLabel.innerText = "Choose a chart type: ";

                var radioContainer = document.createElement('div');
                addClass(radioContainer, 'change-type');
                window.__onChange = function(option) {
                    e.sender.chartType(option)
                }
                // Util to add class
                function addClass(element, className) {
                    var element, name = className,
                        arr;
                    arr = element.className.split(" ");
                    if (arr.indexOf(name) == -1) {
                        element.className += " " + name;
                    }
                }

                function radioWrapper(wrapperId, inputId, label, selected, optionLabel) {
                    var item = "<div id='" + wrapperId + "' >";
                    item += "<input name='dimesion-selector' id='" + inputId + "' type='radio' " + (selected ? "checked='checked'" : '') + " onchange='__onChange(\"" + optionLabel + "\")'/>";
                    item += "<label for='" + inputId + "' >" + label + "</label>"
                    item += "</div>";
                    return item;
                }
                var changeTypeChilds = '';

                Object.keys(options).forEach(function(option, index) {
                    var label = options[option];
                    var selected = chartSelected === option;
                    var radioOption = radioWrapper('radio' + (index + 1), 'radioButton' + (index + 1), label.toUpperCase(), selected, option);
                    changeTypeChilds += radioOption;
                });

                radioContainer.innerHTML = changeTypeChilds;

                optionsContainer.appendChild(spanLabel);
                optionsContainer.appendChild(radioContainer);

                parent.appendChild(optionsContainer);

                var css = '.change-type{display:inline-block;margin:0 10px;font-family:basefontRegular,Helvetica Neue,Arial,sans-serif}.change-type>div{display:inline-flex;position:relative;margin:0 10px}.change-type label{position:relative;padding:5px 4px 5px 30px;border-radius:4px}.change-type input{opacity:0;cursor:pointer;z-index:1;width:100%;height:100%;left:0;position:absolute}.change-type label:after,.change-type label:before{content:"";position:absolute}.change-type label:before{display:block;background:#fff;border:2px solid #949697;box-shadow:none;border-radius:50%;top: 15px;left: 9px;width:1rem;height:1rem}.change-type label:after{    width: .55rem;height: .55rem;top: 18px;left: 11px;border-radius: 100%;}.change-type input:checked~label{color:#48b884;font-weight:600;box-shadow:0 4px 9px 0 rgba(104,105,128,.22)}.change-type input:checked~label:before{color:#fff;box-shadow:none;border:2px solid #48b884}.change-type input:checked~label:after{background:#55bd8d}';

                var styleNode = document.createElement('style');
                styleNode.innerHTML = css;
                document.body.appendChild(styleNode);
            }
            if (!window.__sample_change_chart_type_instansiated) {
                instantiate();
            }
            window.__sample_change_chart_type_instansiated = true;
        }
    }
});// Render
chartInstance.render();

The above chart has been rendered using the following steps:

  1. Include the necessary libraries and components using import. For example, fusioncharts library, etc.

  2. Add the chart and theme as dependency.

  3. Store 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 dataFormat as JSON.
    • Embed the json data as the value of dataSource.
  4. beforeRender event is called to update the chart type from column2d to bar2d or pie2d.

  5. Radio buttons are created inside the <div> to choose a chart type from:

    • Column 2D
    • Bar 2D
    • Pie 2D
  6. Functionalities are added to the radio buttons to update the chart type at runtime.

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