Initial scrollbar in Angular Chart component

27 Sep 20237 minutes to read

By setting zoomFactor in primaryXAxis and isZoomed value as true in load event and enableScrollbar value as true in zoomSettings, you can make the scrollbar visible in initial rendering of chart.

app.component.ts

import { Component, OnInit } from '@angular/core';
import { ILoadedEventArgs } from '@syncfusion/ej2-angular-charts';

@Component({
    selector: 'app-container',
    template: `<ejs-chart style='display:block' align='center' id='chartcontainer' [title]='title' [primaryXAxis]='primaryXAxis' [primaryYAxis]='primaryYAxis'
            [tooltip]='tooltip' (load)='load($event)'[zoomSettings]='zoomSettings' >
            <e-series-collection>
                <e-series [dataSource]='chartData' type='Line' xName='x' yName='y' name='Germany' width=2 [marker]='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public marker?: Object;
    public primaryYAxis?: Object;
    public tooltip: Object = {
        enable: true
    };
    public load(args: ILoadedEventArgs): void {
       args.chart.zoomModule.isZoomed = true;
    };
     public zoomSettings: Object = {
        mode: 'X',
        enableMouseWheelZooming: true,
        enablePinchZooming: true,
        enableSelectionZooming: true,
        enableScrollbar: true
    };
    ngOnInit(): void {
        this.chartData =[
    { x: new Date(2005, 0, 1), y: 21 },
    { x: new Date(2006, 0, 1), y: 24 },
    { x: new Date(2007, 0, 1), y: 36 },
    { x: new Date(2008, 0, 1), y: 38 },
    { x: new Date(2009, 0, 1), y: 54 },
    { x: new Date(2010, 0, 1), y: 21 },
    { x: new Date(2011, 0, 1), y: 24 },
    { x: new Date(2012, 0, 1), y: 36 },
    { x: new Date(2013, 0, 1), y: 38 },
    { x: new Date(2014, 0, 1), y: 54 },
    { x: new Date(2015, 0, 1), y: 21 },
    { x: new Date(2016, 0, 1), y: 24 },
    { x: new Date(2017, 0, 1), y: 36 },
    { x: new Date(2018, 0, 1), y: 38 },
                ];
        this.primaryXAxis = {
        zoomFactor: 0.3,
        valueType: 'DateTime',
        labelFormat: 'y',
        intervalType: 'Years',
        edgeLabelPlacement: 'Shift',
        };
        this.primaryYAxis = {
        labelFormat: '{value}%',
        rangePadding: 'None',
        minimum: 0,
        maximum: 100,
        interval: 20,
        };
        this.marker = {  visible: true,
        height: 10,
        width: 10 };
        this.title =  'NC Weather Report - 2016';
    }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule, ChartAllModule, AccumulationChartAllModule } from '@syncfusion/ej2-angular-charts';
import { GridModule } from '@syncfusion/ej2-angular-grids';
import { PageService } from '@syncfusion/ej2-angular-grids';
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts';
import { DialogModule } from '@syncfusion/ej2-angular-popups';
import { PieSeriesService, AccumulationTooltipService, AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts';
import {
    LineSeriesService, DateTimeService, DataLabelService, StackingColumnSeriesService, CategoryService,
    StepAreaSeriesService, SplineSeriesService, ScrollBarService, ChartAnnotationService, LegendService, TooltipService, StripLineService,
    SelectionService, ScatterSeriesService, ZoomService, ColumnSeriesService, AreaSeriesService, RangeAreaSeriesService
} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule, ChartAllModule, AccumulationChartAllModule, AccumulationChartModule, GridModule, DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [LineSeriesService, DateTimeService, ColumnSeriesService, DataLabelService, ZoomService, StackingColumnSeriesService, CategoryService,
        StepAreaSeriesService, SplineSeriesService, ChartAnnotationService, LegendService, TooltipService, StripLineService,
        PieSeriesService, AccumulationTooltipService, ScrollBarService, AccumulationDataLabelService, SelectionService, ScatterSeriesService,
        PageService, AreaSeriesService, RangeAreaSeriesService ]
})
export class AppModule { }

main.ts

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

import 'zone.js';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);