Tooltip in Angular Accumulation chart component

24 Dec 202421 minutes to read

Tooltip for the accumulation chart can be enabled by using the enable property.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
     public tooltip?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
                enable: true
                }
        };
    }
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Note: To use tooltip feature, inject the AccumulationTooltipService into the @NgModule.providers.

Header

We can specify header for the tooltip using header property.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
     public tooltip?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
              enable: true, header:"Pie Chart"
                }
        };
    }
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Format

By default, tooltip shows information of x and y value in points. In addition to that, you can show more
information in tooltip. For example the format ${series.name} ${point.x} shows series name and point x value.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
     public tooltip?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
              enable: true,  format: '${point.x} : <b>${point.y}%</b>'
                }
        };
    }
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Any HTML element can be displayed in the tooltip by using the template property.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
     public tooltip?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
              enable: true,  template: "<div id='templateWrap' style='background-color:#bd18f9;border-radius: 3px; float: right;padding: 2px;line-height: 20px;text-align: center;'>"+
        "<img src='https://ej2.syncfusion.com/demos/src/chart/images/sunny.png' />" +
        "<div style='color:white; font-family:Roboto; font-style: medium; fontp-size:14px;float: right;padding: 2px;line-height: 20px;text-align: center;padding-right:6px'><span>${y}</span></div></div>"
                }
        };
    }
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

By default, tooltip track the mouse movement, but you can set a fixed position for the tooltip by using the location property.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
     public tooltip?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
            enable: true,  
            location: { x: 200, y: 20 }
        }
    };
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Customization

The fill and border properties are used to customize the background color and border of the tooltip respectively. The textStyle property in the tooltip is used to customize the font of the tooltip text. The highlightColor property can be used to change the color of the data point when hovering.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'

import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip' highlightColor="red" [legendSettings]='legendSettings'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata: Object[] = [];
     public tooltip?: Object;
     public legendSettings?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
              enable: true };
              this.legendSettings = { visible: false}
        };
    }
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

By default, tooltip shows information of x and y value in points. You can show more information from datasource in tooltip by using the tooltipMappingName property of the tooltip.
You can use the ${point.tooltip} as place holders to display the specified tooltip content.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y' tooltipMappingName='text'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
    public tooltip?: Object;
    ngOnInit(): void {
        this.piedata = [{ x: 'Jan', y: 13, text: 'Jan: 13' }, { x: 'Feb', y: 13, text: 'Feb: 13' },
                        { x: 'Mar', y: 17, text: 'Mar: 17' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' }
         ];
         this.tooltip = {
              enable: true, format: '${point.tooltip}'
                }
               };
    }
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Using tooltipRenderevent, you can customize a tooltip for particular point. event, you can customize a tooltip for particular point.

app.component.ts
main.ts
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
import { IAccTooltipRenderEventArgs } from '@syncfusion/ej2-charts';
import { FontModel } from '@syncfusion/ej2-angular-charts';
@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip' (tooltipRender)="ontooltipRender($event)">
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
    public tooltip?: Object;
    public ontooltipRender?: Function;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
            enable: true
        }
        this.ontooltipRender = (args: IAccTooltipRenderEventArgs) => {
            if (args.point.index === 3) {
                args.text = args.point.x + '' + ':' + args.point.y + '' + ' ' +'customtext';
                (args.textStyle as FontModel).color = '#f48042';
            }
        }
    };
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Enable highlight

By setting the enableHighlight property to true, the hovered pie slice is highlighted, while the remaining slices are dimmed, enhancing focus and clarity.

app.component.ts
main.ts
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts';
import { PieSeriesService, AccumulationTooltipService, AccumulationLegendService } from '@syncfusion/ej2-angular-charts';
import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';

@Component({
    imports: [AccumulationChartModule],
    providers: [PieSeriesService, AccumulationTooltipService, AccumulationLegendService],
    standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [tooltip]='tooltip' [legendSettings]='legendSettings'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
    public tooltip?: Object;
    public legendSettings?: Object;
    ngOnInit(): void {
        this.piedata = pieData;
        this.tooltip = {
            enable: true,
            enableHighlight: true
        };
        this.legendSettings = { visible: false };
    };
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Tooltip in Angular Accumulation chart component

Header

Format

Tooltip template

Fixed tooltip

Customization

Tooltip mapping name

To customize individual tooltip

Enable highlight