jqwidgets-scripts-custom/demos/Angular/treegrid/aggregates/src/app/app.component.ts

jQWidgets is an advanced jQuery, Angular 7, Vue, React, ASP .NET MVC, Custom Elements and HTML5 UI framework.

import { Component, ViewChild, ViewEncapsulation } from '@angular/core';

import { jqxTreeGridComponent } from 'jqwidgets-scripts/jqwidgets-ts/angular_jqxtree';

@Component({
    selector: 'app-root',
    styleUrls: ['./app.component.css'],
    templateUrl: './app.component.html',
    encapsulation: ViewEncapsulation.None
})

export class AppComponent {
    @ViewChild('TreeGrid') treeGrid: jqxTreeGridComponent

	getWidth() : any {
		if (document.body.offsetWidth < 850) {
			return '90%';
		}
		
		return 850;
	}

    source: any =
    {
        dataType: 'tab',
        dataFields: [
            { name: 'Id', type: 'number' },
            { name: 'Name', type: 'string' },
            { name: 'ParentID', type: 'number' },
            { name: 'Population', type: 'number' }
        ],
        hierarchy:
        {
            keyDataField: { name: 'Id' },
            parentDataField: { name: 'ParentID' }
        },
        id: 'Id',
        url: '../assets/locations.txt'
    };

    dataAdapter: any = new jqx.dataAdapter(this.source);

    ready(): void {
        this.treeGrid.expandRow(34);
    };

    columns: any[] = [
        { text: 'Location Name', dataField: 'Name', align: 'center', width: '50%' },
        { text: 'Population', dataField: 'Population', align: 'center', width: '50%', aggregates: ['min', 'max', 'count'] }
    ];
}