Cross hair and track ball in Angular Chart component
27 Apr 202416 minutes to read
Crosshair has a vertical and horizontal line to view the value of the axis at mouse or touch position.
Crosshair lines can be enabled by using enable
property in the crosshair
.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule} from '@syncfusion/ej2-angular-charts'
import { DateTimeService, LineSeriesService} from '@syncfusion/ej2-angular-charts'
import { LegendService, CrosshairService } from '@syncfusion/ej2-angular-charts'
import { Component, OnInit } from '@angular/core';
import { ChartData } from './chartdata';
@Component({
imports: [
ChartModule
],
providers: [ DateTimeService, LineSeriesService, LegendService, CrosshairService],
standalone: true,
selector: 'app-container',
template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title' [legendSettings]='legend' [crosshair]='crosshair'>
<e-series-collection>
<e-series [dataSource]='series1' type='Line' xName='x' yName='y' name='Temperature'></e-series>
</e-series-collection>
</ejs-chart>`
})
export class AppComponent implements OnInit {
public primaryXAxis?: Object;
public series1?: Object[];
public crosshair?: Object;
public title?: string;
public primaryYAxis?: Object;
public legend?: Object;
ngOnInit(): void {
this.primaryXAxis = {
valueType: 'DateTime',
labelFormat: 'yMMM'
};
this.crosshair = { enable: true };
this.series1 = ChartData.prototype.getCrosshairData().series1;
this.legend = { visible: true };
this.title = 'Weather Condition';
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Tooltip for axis
Tooltip label for an axis can be enabled by using enable
property of crosshairTooltip
in the corresponding axis.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule} from '@syncfusion/ej2-angular-charts'
import { DateTimeService, LineSeriesService} from '@syncfusion/ej2-angular-charts'
import { LegendService, CrosshairService } from '@syncfusion/ej2-angular-charts'
import { Component, OnInit } from '@angular/core';
import { ChartData } from './chartdata';
@Component({
imports: [
ChartModule
],
providers: [ DateTimeService, LineSeriesService, LegendService, CrosshairService],
standalone: true,
selector: 'app-container',
template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title' [legendSettings]='legend' [crosshair]='crosshair'>
<e-series-collection>
<e-series [dataSource]='series1' type='Line' xName='x' yName='y' name='Temperature'></e-series>
</e-series-collection>
</ejs-chart>`
})
export class AppComponent implements OnInit {
public primaryXAxis?: Object;
public series1?: Object[];
public majorGridLines?: Object;
public crosshair?: Object;
public title?: string;
public primaryYAxis?: Object;
public legend?: Object;
ngOnInit(): void {
this.primaryXAxis = {
valueType: 'DateTime',
crosshairTooltip: { enable: true },
labelFormat: 'yMMM'
};
this.primaryYAxis = {
crosshairTooltip: { enable: true }
};
this.crosshair = { enable: true };
this.series1 = ChartData.prototype.getCrosshairData().series1;
this.legend = { visible: true };
this.title = 'Weather Condition';
}
}
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 textStyle
property of the crosshairTooltip
is used to customize the background color and font style of the crosshair label respectively. Color and width of the crosshair line can be customized by using the line
property in the crosshair.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule} from '@syncfusion/ej2-angular-charts'
import { DateTimeService, LineSeriesService} from '@syncfusion/ej2-angular-charts'
import { LegendService, CrosshairService } from '@syncfusion/ej2-angular-charts'
import { Component, OnInit } from '@angular/core';
import { ChartData } from './chartdata';
@Component({
imports: [
ChartModule
],
providers: [ DateTimeService, LineSeriesService, LegendService, CrosshairService],
standalone: true,
selector: 'app-container',
template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title' [legendSettings]='legend' [crosshair]='crosshair'>
<e-series-collection>
<e-series [dataSource]='series1' type='Line' xName='x' yName='y' name='Temperature'></e-series>
</e-series-collection>
</ejs-chart>`
})
export class AppComponent implements OnInit {
public primaryXAxis?: Object;
public series1?: Object[];
public crosshair?: Object;
public title?: string;
public primaryYAxis?: Object;
public legend?: Object;
ngOnInit(): void {
this.primaryXAxis = {
valueType: 'DateTime',
crosshairTooltip: { enable: true, fill: 'green' },
labelFormat: 'yMMM'
};
this.primaryYAxis = {
crosshairTooltip: { enable: true, fill: 'green' }
};
this.crosshair = { enable: true, line: {width: 2, color: 'green'}, fill: 'green' };
this.series1 = ChartData.prototype.getCrosshairData().series1;
this.series1 = ChartData.prototype.getCrosshairData().series2;
this.legend = { visible: true};
this.title = 'Weather Condition';
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Note: To use crosshair feature, we need to inject
CrosshairService
into theNgModule.providers
.
Trackball
Trackball is used to track a data point closest to the mouse or touch position. Trackball marker indicates the closest point and trackball tooltip displays the information about the point. To use trackball feature, we need to inject CrosshairService
and TooltipService
into the NgModule.providers
.
Trackball can be enabled by setting the enable
property of the crosshair to true and shared
property in tooltip
to true in chart.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule } from '@syncfusion/ej2-angular-charts'
import { DateTimeService, LineSeriesService } from '@syncfusion/ej2-angular-charts'
import { LegendService, DataLabelService, TooltipService, CrosshairService } from '@syncfusion/ej2-angular-charts'
import { Component, OnInit } from '@angular/core';
@Component({
imports: [
ChartModule
],
providers: [ DateTimeService, LineSeriesService, LegendService, DataLabelService,
TooltipService, CrosshairService],
standalone: true,
selector: 'app-container',
template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title' [crosshair]='crosshair' [tooltip]='tooltip'>
<e-series-collection>
<e-series [dataSource]='chartData' type='Line' xName='x' yName='y' name='John' width=2 [marker]='marker'></e-series>
<e-series [dataSource]='chartData' type='Line' xName='x' yName='y1' name='Andrew' width=2 [marker]='marker'></e-series>
<e-series [dataSource]='chartData' type='Line' xName='x' yName='y2' name='Thomas' width=2 [marker]='marker'></e-series>
<e-series [dataSource]='chartData' type='Line' xName='x' yName='y3' name='Mark' width=2 [marker]='marker'></e-series>
<e-series [dataSource]='chartData' type='Line' xName='x' yName='y4' name='William' width=2 [marker]='marker'></e-series>
</e-series-collection>
</ejs-chart>`
})
export class AppComponent implements OnInit {
public primaryXAxis?: Object;
public primaryYAxis?: Object;
public chartData?: Object[];
public crosshair?: Object;
public title?: string;
public tooltip?: Object;
public marker?: Object;
ngOnInit(): void {
this.chartData = [
{ x: new Date(2000, 2, 11), y: 15, y1: 39, y2: 60, y3: 75, y4: 85 },
{ x: new Date(2000, 9, 14), y: 20, y1: 30, y2: 55, y3: 75, y4: 83 },
{ x: new Date(2001, 2, 11), y: 25, y1: 28, y2: 48, y3: 68, y4: 85 },
{ x: new Date(2001, 9, 16), y: 21, y1: 35, y2: 57, y3: 75, y4: 87 },
{ x: new Date(2002, 2, 7), y: 13, y1: 39, y2: 62, y3: 71, y4: 82 },
{ x: new Date(2002, 9, 7), y: 18, y1: 41, y2: 64, y3: 69, y4: 74 },
{ x: new Date(2003, 2, 11), y: 24, y1: 45, y2: 57, y3: 81, y4: 73 },
{ x: new Date(2003, 9, 14), y: 23, y1: 48, y2: 53, y3: 84, y4: 75 },
{ x: new Date(2004, 2, 6), y: 19, y1: 54, y2: 63, y3: 85, y4: 73 },
{ x: new Date(2004, 9, 6), y: 31, y1: 55, y2: 50, y3: 87, y4: 60 },
{ x: new Date(2005, 2, 11), y: 39, y1: 57, y2: 66, y3: 75, y4: 48 },
{ x: new Date(2005, 9, 11), y: 50, y1: 60, y2: 65, y3: 70, y4: 55 },
{ x: new Date(2006, 2, 11), y: 24, y1: 60, y2: 79, y3: 85, y4: 40 }
];
this.primaryXAxis = {
title: 'Years',
minimum: new Date(2000, 1, 1), maximum: new Date(2006, 2, 11),
intervalType: 'Years',
valueType: 'DateTime',
};
this.tooltip = { enable: true, shared: true, format: '${series.name} : ${point.x} : ${point.y}' };
this.crosshair = { enable: true, lineType: 'Vertical' };
this.marker = { visible: true };
this.title = 'Average Sales per Person';
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
To known about Crosshair and Trackball, you can check on this video: