Adding Drill Down using Vue

With FusionCharts, you can create unlimited levels of drill-down with a single data source. The parent chart contains all data — for the parent chart as well as all descendant (child, grandchild) charts. The links to all the descendant charts are defined in the parent chart.

You can drill-down to descendant charts by simply clicking the data plot items on the parent chart. A descendant chart can either replace the parent chart with an option to drill-up, or it can open in a new window or frame.

Features of the FusionCharts JavaScript Class

  • Automatically creates and shows a detailed descendant chart when you click on the corresponding data plot item linked in the parent chart

  • Clones all chart configuration settings from the parent chart to create the descendant charts

  • Accepts specific properties for descendant charts when you configure them using the configureLink() function

  • Uses events to notify your code when a link is invoked, a link item is opened, or a link item is closed

  • Supports drill-down to an unlimited number of levels

Create drill-down

As an example, we will consider a simple scenario of a parent chart with the single level of drill-down.

The parent chart is a column 2D chart that shows the yearly sales of the top three juice flavors, for the last year. When you click on the data plot for a particular flavor of juice, it drills down to show a pie 2D chart that shows the quarterly sales figures for that flavor.

The above chart, when rendered, looks like the following:

FusionCharts will load here..

The code to render a chart is given below:

//Including Vue
import Vue from 'vue';

// Include the vue-fusioncharts component
import VueFusionCharts from 'vue-fusioncharts';

//Include the FusionCharts library
import FusionCharts from 'fusioncharts/core';

//Include the chart type
import Column2D from 'fusioncharts/viz/column2d'

// Register VueFusionCharts component
Vue.use(VueFusionCharts);

var app = new Vue({
    el: '#app',
    data: {
        width: '700',
        height: '400',
        type: 'column2d',
        dataFormat: 'json',
        dataSource: {
            "chart": {
                "caption": "Top 3 Juice Flavors",
                "subcaption": "Last year",
                "xaxisname": "Flavor",
                "yaxisname": "Amount (In USD)",
                "numberprefix": "$",
                "theme": "fusion",
                "rotateValues": "0"
            },
            "data": [{
                "label": "Apple",
                "value": "810000",
                "link": "newchart-xml-apple"
            }, {
                "label": "Cranberry",
                "value": "620000",
                "link": "newchart-xml-cranberry"
            }, {
                "label": "Grapes",
                "value": "350000",
                "link": "newchart-xml-grapes"
            }],
            "linkeddata": [{
                "id": "apple",
                "linkedchart": {
                    "chart": {
                        "caption": "Apple Juice - Quarterly Sales",
                        "subcaption": "Last year",
                        "numberprefix": "$",
                        "theme": "fusion",
                        "rotateValues": "0",
                        "plottooltext": "$label, $dataValue,  $percentValue"
                    },
                    "data": [{
                        "label": "Q1",
                        "value": "157000"
                    }, {
                        "label": "Q2",
                        "value": "172000"
                    }, {
                        "label": "Q3",
                        "value": "206000"
                    }, {
                        "label": "Q4",
                        "value": "275000"
                    }]
                }
            }, {
                "id": "cranberry",
                "linkedchart": {
                    "chart": {
                        "caption": "Cranberry Juice - Quarterly Sales",
                        "subcaption": "Last year",
                        "numberprefix": "$",
                        "theme": "fusion",
                        "plottooltext": "$label, $dataValue,  $percentValue"
                    },
                    "data": [{
                        "label": "Q1",
                        "value": "102000"
                    }, {
                        "label": "Q2",
                        "value": "142000"
                    }, {
                        "label": "Q3",
                        "value": "187000"
                    }, {
                        "label": "Q4",
                        "value": "189000"
                    }]
                }
            }, {
                "id": "grapes",
                "linkedchart": {
                    "chart": {
                        "caption": "Grapes Juice - Quarterly Sales",
                        "subcaption": "Last year",
                        "numberprefix": "$",
                        "theme": "fusion",
                        "rotateValues": "0",
                        "plottooltext": "$label, $dataValue,  $percentValue"
                    },
                    "data": [{
                        "label": "Q1",
                        "value": "45000"
                    }, {
                        "label": "Q2",
                        "value": "72000"
                    }, {
                        "label": "Q3",
                        "value": "95000"
                    }, {
                        "label": "Q4",
                        "value": "108000"
                    }]
                }
            }]
        }
    },
    methods: {
        configureLink: function(chart) {
            this.chartInstance = chart; // Save it for further use

            // Configure Drilldown attributes 
            // See this : https://www.fusioncharts.com/dev/api/fusioncharts/fusioncharts-methods#configureLink
            this.chartInstance.configureLink({
                type: "pie2d",
                overlayButton: {
                    message: 'Back',
                    fontColor: '880000',
                    bgColor: 'FFEEEE',
                    borderColor: '660000'
                }
            }, 0)
        }
    },
    mounted: function() {
        this.configureLink(this.$refs.fc.chartObj); // this.$refs.fc gets the vue-fusionchart component
    }
});

Now, use the fusioncharts directive in a template. The HTML template is given below:

<div id="app">
    <fusioncharts
    :type="type"
    :width="width"
    :height="height"
    :dataFormat="dataFormat"
    :dataSource="dataSource"
    ref="fc"
    ></fusioncharts>
</div>

The above chart has been rendered using the following steps:

  1. Included the necessary libraries and components using import. For example, vue-fusioncharts, fusioncharts, etc.

  2. Registered vue-fusioncharts component.

  3. Stored the chart configuration in a JSON object. In the JSON object:

    • The chart type has been set to column2d for the first chart. For Column 2D chart, the alias is column2d. Once the data plots in the Column charts are clicked, the rendered chart is a Pie 2D chart (alias name: pie2d).Find the complete list of chart types with their respective alias here.
    • The width and height of the chart has been set in pixels.
    • The dataFormat is set as JSON.
    • Create the JSON/XML data for the parent chart. This is called the parent data source.
    • Append the data string or the data URL for the descendant charts within the parent data source. If you append a data string, the data for each descendant chart is embedded within the parent data source and is linked using unique data identifiers.
  4. Created a fusioncharts directive in a template.

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