Drilldown with label in Vue Treemap component

11 Apr 20238 minutes to read

Add label template with drill down

Yon can add a label template as <div> element to the treemap control when using the label template. To add a label template to the treemap control, you have to hide another labels by setting the showLabels property to false in leafItemSettings to show only the label template.

To add label template to treemap drilldown, follow the given steps:

Step 1:

Create a treemap control and enable the drill-down option.

<template>
      <div class='control_wrapper'>
         <ejs-treemap id='container' :dataSource="dataSource" weightValuePath="Sales" enableDrillDown="true" :palette="palette"
         :leafItemSettings='leafItemSettings' :levels='levels' >
         </ejs-treemap>
      </div>
</template>

<script>
import Vue from 'vue';
import { TreeMapPlugin } from '@syncfusion/ej2-vue-treemap';

Vue.use(TreeMapPlugin);
export default {
   data () {
    return {
       dataSource:  [
            { Continent: "China", Company: "Volkswagen", Sales: 3005994 },
            { Continent: "China", Company: "General Motors", Sales: 1230044 },
            { Continent: "China", Company: "Honda", Sales: 1197023 },
            { Continent: "United States", Company: "General Motors", Sales: 3042775 },
            { Continent: "United States", Company: "Ford", Sales: 2599193 },
            { Continent: "United States", Company: "Toyota", Sales: 2449587 },
            { Continent: "Japan", Company: "Toyota", Sales: 1527977 },
            { Continent: "Japan", Company: "Honda", Sales: 706982 },
            { Continent: "Japan", Company: "Suzuki", Sales: 623041 },
            { Continent: "Germany", Company: "Volkswagen", Sales: 655977 },
            { Continent: "Germany", Company: "Mercedes", Sales: 310845 },
            { Continent: "Germany", Company: "BMW", Sales: 261931 },
            { Continent: "United Kingdom", Company: "Ford ", Sales: 319442 },
            { Continent: "United Kingdom", Company: "Vauxhall", Sales: 251146 },
            { Continent: "United Kingdom", Company: "Volkswagen", Sales: 206994 }
        ],
        palette: ['white'],
        levels: [
            {
                groupPath: 'Continent', border: { color: 'black', width: 0.5 },
            },
            {
              groupPath: 'Company', border: { color: 'black', width: 0.5 },
            }
        ],
        leafItemSettings: {
          showLabels: false,
          labelTemplate: '<div style="background-color: red">${Company}</div>',
          templatePosition: 'Center'
        }
     }
  }
}
</script>

Step 2:

Add the label template in the leafItemSettings options, and then set the showLabels property to false to hide another labels and show only label template.

app.vue

<template>
      <div class='control_wrapper'>
         <ejs-treemap id='container' :dataSource="dataSource" weightValuePath="Sales" enableDrillDown="true" :palette="palette"
         :leafItemSettings='leafItemSettings' :levels='levels' :drillStart='drillStart' >
         </ejs-treemap>
      </div>
</template>

<script>
import Vue from 'vue';
import { TreeMapPlugin } from '@syncfusion/ej2-vue-treemap';

Vue.use(TreeMapPlugin);
export default {
   data () {
    return {
      dataSource:  [
            { Continent: "China", Company: "Volkswagen", Sales: 3005994 },
            { Continent: "China", Company: "General Motors", Sales: 1230044 },
            { Continent: "China", Company: "Honda", Sales: 1197023 },
            { Continent: "United States", Company: "General Motors", Sales: 3042775 },
            { Continent: "United States", Company: "Ford", Sales: 2599193 },
            { Continent: "United States", Company: "Toyota", Sales: 2449587 },
            { Continent: "Japan", Company: "Toyota", Sales: 1527977 },
            { Continent: "Japan", Company: "Honda", Sales: 706982 },
            { Continent: "Japan", Company: "Suzuki", Sales: 623041 },
            { Continent: "Germany", Company: "Volkswagen", Sales: 655977 },
            { Continent: "Germany", Company: "Mercedes", Sales: 310845 },
            { Continent: "Germany", Company: "BMW", Sales: 261931 },
            { Continent: "United Kingdom", Company: "Ford ", Sales: 319442 },
            { Continent: "United Kingdom", Company: "Vauxhall", Sales: 251146 },
            { Continent: "United Kingdom", Company: "Volkswagen", Sales: 206994 }
        ],
        palette: ['white'],
        levels: [
            {
                groupPath: 'Continent', border: { color: 'black', width: 0.5 },
            },
            {
              groupPath: 'Company', border: { color: 'black', width: 0.5 },
            }
        ],
        leafItemSettings: {
          showLabels: false,
          labelTemplate: '<div style="background-color: red">${Company}</div>',
          templatePosition: 'Center'
        }
    }
  },
  methods:{
    drillStart:function(args){
        let labelElementGroup = document.getElementById('container_Label_Template_Group');
        labelElementGroup.remove();
    }
  }
}
</script>