User interaction in Angular Sparkline component

23 Sep 202311 minutes to read

Sparkline has two user interaction features: tooltip and tracker line.

Tooltip

The sparkline provides options to display details about values of data points through tooltips when hovering the mouse over data point. To use tooltip in sparkline, inject the SparklineTooltip module to sparkline using the inject method.

The following code example shows enabling tooltip for sparkline with format.

[app.component.ts]

app.component.ts

import { Component } from '@angular/core';
import { TooltipSettingsModel } from '@syncfusion/ej2-angular-charts';

@Component({
    selector: 'app-container',
    template: `<ejs-sparkline id='container' width='500px' height='200px' [axisSettings]='axisSettings' [tooltipSettings]='tooltipSettings'  fill= 'blue'valueType= 'Category' [dataSource]="data" xName="x" yName="y">
    </ejs-sparkline>`
})
export class AppComponent {
    public data: object[] = [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 }];
    public axisSettings: object ={
        minX: -1, maxX: 7, maxY: 8, minY: -1
    };
    public tooltipSettings: object = {
        visible: true,
        // formatting tooltip text
        format: '${x} : ${y}'
    };
};

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { SparklineModule, SparklineTooltipService } from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, SparklineModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [SparklineTooltipService]
})
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);

Tooltip customization

The fill color, text styles, format, and border of the tooltip can be customized. The following code example shows customization of tooltip’s fill color and text style.

[app.component.ts]

app.component.ts

import { Component } from '@angular/core';
import { TooltipSettingsModel } from '@syncfusion/ej2-angular-charts';


@Component({
    selector: 'app-container',
    template: `<ejs-sparkline id='container' width='500px' height='200px' [axisSettings]='axisSettings' [tooltipSettings]='tooltipSettings'  fill= '#033e96' valueType= 'Category' [dataSource]="data" xName="x" yName="y">
    </ejs-sparkline>`
})
export class AppComponent {
    public data: object[] = [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 }];
    public axisSettings: object ={
        minX: -1, maxX: 7, maxY: 8, minY: -1
    };
    public tooltipSettings: object= {
        visible: true,
        format: '${x} : ${y}',
        fill: '#033e96',
        textStyle: {
            color: 'white'
        },
    }
};

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { SparklineModule, SparklineTooltipService } from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, SparklineModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [SparklineTooltipService]
})
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);

Tooltip template

Sparkline tooltip has template support. By using tooltip template, you can customize tooltips. The following code example shows more customization options provided to sparktooltip css class that is used in tooltip template div. Using this template, images also can be added to tooltip.

.sparktooltip {
  border-radius: 5px;
  background: #008cff;
  color: #FFFFFF !important;
  font-size: 16px;
  font-style: italic;
  padding: 8px;
}

[app.component.ts]

app.component.ts

import { Component } from '@angular/core';
import { TooltipSettingsModel } from '@syncfusion/ej2-angular-charts';


@Component({
    selector: 'app-container',
    template: `<ejs-sparkline id='container' width='500px' height='200px' [axisSettings]='axisSettings' [tooltipSettings]='tooltipSettings'  fill= '#033e96' valueType= 'Category' [dataSource]="data" xName="x" yName="y">
    </ejs-sparkline>`
})
export class AppComponent {
    public data: object[] = [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 }];
    public axisSettings: object ={
        minX: -1, maxX: 7, maxY: 8, minY: -1
    };
    public tooltipSettings: object= {
        visible: true,
        template: '<div style=" border-radius: 5px; background: #008cff; padding: 8px; color: #FFFFFF !important; font-size: 16px; font-style: italic;">${x} : ${y}<div>'
    }
};

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { SparklineModule, SparklineTooltipService } from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, SparklineModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [SparklineTooltipService]
})
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);

Track line

The track line tracks data points that are closer to the mouse position or touch contact.

To enable track lines for sparkline, specify the visible option of trackLineSettings to true. Based on theme, tracker color will be changed. The default value of tracker color is black.

To use track line in sparkline, inject the SparklineTooltip module to sparkline using the inject method.

[app.component.ts]

app.component.ts

import { Component } from '@angular/core';
import { TooltipSettingsModel } from '@syncfusion/ej2-angular-charts';

@Component({
    selector: 'app-container',
    template: `<ejs-sparkline id='container'width='500px' height='200px' [axisSettings]='axisSettings' [tooltipSettings]='tooltipSettings'  fill= '#033e96' valueType= 'Category' [dataSource]="data" xName="x" yName="y">
    </ejs-sparkline>`
})
export class AppComponent { public data: object[] = [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 }];
public axisSettings: object ={
        minX: -1, maxX: 7, maxY: 8, minY: -1
    };
    public tooltipSettings: object= {
        visible: true,
        trackLineSettings: {
            visible: true,
            color: '#033e96',
            width: 1
        }
        };
};

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { SparklineModule, SparklineTooltipService } from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, SparklineModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [SparklineTooltipService]
})
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);