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Getting started with Angular Range Navigator component

03 Aug 2021 / 4 minutes to read

This section explains you the steps required to create a simple RangeNavigator and demonstrate the basic usage of the RangeNavigator component in an Angular environment.

Setup Angular Environment

You can use Angular CLI to setup your Angular applications. To install Angular CLI use the following command.

npm install -g @angular/cli

Create an Angular Application

Start a new Angular application using below Angular CLI command.

ng new my-app
cd my-app

Adding Syncfusion Chart package

All the available Essential JS 2 packages are published in npmjs.com registry.

To install RangeNavigator component, use the following command.

npm install @syncfusion/ej2-angular-charts --save

The —save will instruct NPM to include the chart package inside of the dependencies section of the package.json.

Registering RangeNavigator Module

Import Chart module into Angular application(app.module.ts) from the package @syncfusion/ej2-angular-charts [src/app/app.module.ts].

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
// import the RangeNavigatorModule for the RangeNavigator component
import { RangeNavigatorModule } from '@syncfusion/ej2-angular-charts';
import { AppComponent }  from './app.component';

@NgModule({
    //declaration of RangeNavigatorModule into NgModule
  imports:  [ BrowserModule, RangeNavigatorModule ],
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

Modify the template in app.component.ts file to render the ej2-angular-charts component [src/app/app.component.ts].

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

@Component({
  selector: 'app-container',
  // specifies the template string for the RangeNavigator component
  template: `<ejs-rangenavigator id="rn-container"></ejs-rangenavigator>`
  encapsulation: ViewEncapsulation.None
})
export class AppComponent  { }

Now use the app-container in the index.html instead of default one.

<app-container></app-container>

Now run the application in the browser using the below command.

npm start

Module Injection

To create range navigator with additional features, inject the required modules. The following modules are used to extend rangenavigator’s basic functionality.

AreaSeriesService - Inject this module to use area series.
DateTimeService - Inject this module to use date time axis.
RangeTooltipService - Inject this module to show the tooltip.

These modules should be injected to the provider section as follows,

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { RangeNavigatorComponent } from '@syncfusion/ej2-angular-charts';
import { AreaSeriesService, DateTimeService, RangeTooltipService } from '@syncfusion/ej2-angular-charts';

@NgModule({
   imports: [
       BrowserModule,
   ],
   declarations: [AppComponent, RangeNavigatorComponent],
   bootstrap: [AppComponent],
   providers: [ AreaSeriesService, DateTimeService, RangeTooltipService ]
})

Populate Range Navigator with Data

Now, we are going to provide data to the range navigator. Add a series object to the range navigator by using series property. Now map the field names x and y in the JSON data to the xName and yName properties of the series, then set the JSON data to dataSource property. Since the JSON contains Datetime data, set the valueType as DateTime. By default, the axis valueType is Numeric.

Source

Preview

app.component.ts

app.module.ts

main.ts

import { Component, OnInit } from '@angular/core';
import { datasrc } from 'datasource.ts'

@Component({
selector: 'app-container',
template:
`<ejs-rangenavigator id="rn-container" valueType='DateTime' [value]='value'>
        <e-rangenavigator-series-collection>
            <e-rangenavigator-series [dataSource]='chartData' type='Area' xName='x' yName='y' width=2>
            </e-rangenavigator-series>
        </e-rangenavigator-series-collection>
    </ejs-rangenavigator>`
})
export class AppComponent implements OnInit {
public value: Object[];
public chartData: Object[];
ngOnInit(): void {
    this.value = [new Date('2017-09-01'), new Date('2018-02-01')];
    this.chartData = datasrc;
}
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule, RangeNavigatorModule } from '@syncfusion/ej2-angular-charts';
import { AreaSeriesService, DateTimeService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule, RangeNavigatorModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ AreaSeriesService, DateTimeService ]
})
export class AppModule { }

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Note: Get data from here.

The sample should look like our default, don’t worry about the gradient color, let it takes the default color.

The tooltip is useful to show the selected data. You can enable tooltip by setting the enable property as true in tooltip object and by injecting RangeTooltipService module into the @NgModule.providers.