DataBinding

7 Jun 20174 minutes to read

TreeMap control supports Data Binding and it can be achieved using dataSource property.

The dataSource property accepts the collection values as input. For example, you can provide the list of objects as input. The following code illustrates you on how to bind a flat collection as datasource for TreeMap.

TS

import { Component, ViewEncapsulation} from '@angular/core';
import { DataService} from '../service/data.service';

@Component({
selector:"ej-app",
templateUrl:"src/treemap/treemap.component.html",
providers:[DataService]
})
export class TreemapComponent{
dataSource: any;
  constructor(dataService:DataService) {
    this.population_data=dataService.treemapData();
  }
}

TS

export class DataService{
// DataService file containing treemap data in treemapData method
    treemapData():Array<any>{
        return[
                   { Continent: "Asia", Region: "Southern Asia", Growth: 1.32, Population: 1749046000 },
                   { Continent: "Asia", Region: "Eastern Asia", Growth: 0.57, Population: 1620807000 },
                   { Continent: "Asia", Region: "South-Eastern Asia", Growth: 1.20, Population: 618793000 },
                   { Continent: "Asia", Region: "Western Asia", Growth: 1.98, Population: 245707000 },
                   { Continent: "Asia", Region: "Central Asia", Growth: 1.43, Population: 64370000 },
                   { Continent: "Europe", Region: "Europe", Growth: 0.10, Population: 742452000 },
                   { Continent: "America", Region: "South America", Growth: 1.06, Population: 406740000 },
                   { Continent: "America", Region: "Northern America", Growth: 0.85, Population: 355361000 },
                   { Continent: "America", Region: "Central America", Growth: 1.40, Population: 167387000 },
                   { Continent: "Africa", Region: "Eastern Africa", Growth: 2.89, Population: 373202000 },
                   { Continent: "Africa", Region: "Western Africa", Growth: 2.78, Population: 331255000 },
                   { Continent: "Africa", Region: "Northern Africa", Growth: 1.70, Population: 210002000 },
                   { Continent: "Africa", Region: "Middle Africa", Growth: 2.79, Population: 135750000 },
                   { Continent: "Africa", Region: "Southern Africa", Growth: 0.91, Population: 60425000 }
        ];
    }

HTML

<ej-treemap id="treemap"  [dataSource]="population_data" colorValuePath= "Growth"
                                                   weightValuePath= "Population">
               
</ej-treemap>