Tooltip is used to provide the details of the heat map cell, and this can be displayed, while hovering the cursor over the cell or performing tap action in touch devices.
You can enable the tooltip by setting the showTooltip
property to true and injecting the Tooltip
module using the HeatMap.Inject(Tooltip)
.
import { Component, ViewEncapsulation } from '@angular/core';
@Component({
selector: 'my-app',
template:
`<ejs-heatmap id='container' style="display:block;" [dataSource]='dataSource' [xAxis]='xAxis' [yAxis]='yAxis'
[titleSettings]='titleSettings' [cellSettings]='cellSettings' [showTooltip]='showTooltip'>
</ejs-heatmap>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent{
dataSource: Object[] = [
[0.72, 0.71, 0.71, 0.67, 0.72, 0.53, 0.53, 0.56, 0.58, 0.56],
[2.28, 2.29, 2.09, 1.84, 1.64, 1.49, 1.49, 1.39, 1.32, 1.23],
[2.02, 2.17, 2.30, 2.39, 2.36, 2.52, 2.62, 2.57, 2.57, 2.74],
[3.21, 3.26, 3.45, 3.47, 3.42, 3.34, 3.14, 2.83, 2.64, 2.61],
[3.22, 3.13, 3.04, 2.95, 2.69, 2.49, 2.27, 2.18, 2.06, 1.87],
[3.30, 3.39, 3.40, 3.48, 3.60, 3.67, 3.73, 3.79, 3.79, 4.07],
[5.80, 5.74, 5.64, 5.44, 5.18, 5.08, 5.07, 5.00, 5.35, 5.47],
[6.91, 7.40, 8.13, 8.80, 9.04, 9.24, 9.43, 9.35, 9.49, 9.69]];
titleSettings: Object = {
text: 'Crude Oil Production of Non-OPEC Countries (in Million barrels per day)',
textStyle: {
size: '15px',
fontWeight: '500',
fontStyle: 'Normal',
fontFamily: 'Segoe UI'
}
};
xAxis: Object = {
labels: ['Canada', 'China', 'Egypt', 'Mexico', 'Norway', 'Russia', 'UK', 'USA']
};
yAxis: Object = {
labels: ['2000', '2001', '2002', '2003', '2004', '2005', '2006', '2007', '2008', '2009', '2010'],
};
public cellSettings: Object = {
showLabel: false,
};
public showTooltip: Boolean = true;
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { HeatMapModule} from '@syncfusion/ej2-angular-heatmap';
import { TooltipService} from '@syncfusion/ej2-angular-heatmap';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, HeatMapModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [TooltipService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
In heat map, you can customize the tooltip using the tooltipRender
client-side event.
import { Component, ViewEncapsulation } from '@angular/core';
@Component({
selector: 'my-app',
template:
`<ejs-heatmap id='container' style="display:block;" [dataSource]='dataSource' [xAxis]='xAxis' [yAxis]='yAxis'
[titleSettings]='titleSettings' [cellSettings]='cellSettings' (tooltipRender)='tooltipRender($event)'>
</ejs-heatmap>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent{
dataSource: Object[] = [
[0.72, 0.71, 0.71, 0.67, 0.72, 0.53, 0.53, 0.56, 0.58, 0.56],
[2.28, 2.29, 2.09, 1.84, 1.64, 1.49, 1.49, 1.39, 1.32, 1.23],
[2.02, 2.17, 2.30, 2.39, 2.36, 2.52, 2.62, 2.57, 2.57, 2.74],
[3.21, 3.26, 3.45, 3.47, 3.42, 3.34, 3.14, 2.83, 2.64, 2.61],
[3.22, 3.13, 3.04, 2.95, 2.69, 2.49, 2.27, 2.18, 2.06, 1.87],
[3.30, 3.39, 3.40, 3.48, 3.60, 3.67, 3.73, 3.79, 3.79, 4.07],
[5.80, 5.74, 5.64, 5.44, 5.18, 5.08, 5.07, 5.00, 5.35, 5.47],
[6.91, 7.40, 8.13, 8.80, 9.04, 9.24, 9.43, 9.35, 9.49, 9.69]];
titleSettings: Object = {
text: 'Crude Oil Production of Non-OPEC Countries (in Million barrels per day)',
textStyle: {
size: '15px',
fontWeight: '500',
fontStyle: 'Normal',
fontFamily: 'Segoe UI'
}
};
xAxis: Object = {
labels: ['Canada', 'China', 'Egypt', 'Mexico', 'Norway', 'Russia', 'UK', 'USA']
};
yAxis: Object = {
labels: ['2000', '2001', '2002', '2003', '2004', '2005', '2006', '2007', '2008', '2009', '2010'],
};
public cellSettings: Object = {
showLabel: false,
};
public showTooltip: Boolean = true;
public tooltipRender(args: ITooltipEventArgs): void {
args.content = ['In ' + args.yLabel + ', the ' + args.xLabel + ' produced ' + args.value + ' million barrels per day'];
};
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { HeatMapModule} from '@syncfusion/ej2-angular-heatmap';
import { TooltipService} from '@syncfusion/ej2-angular-heatmap';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, HeatMapModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [TooltipService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
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.
import { Component, ViewEncapsulation } from '@angular/core';
@Component({
selector: 'my-app',
template:
`<ejs-heatmap id='container' style="display:block;" [dataSource]='dataSource' [xAxis]='xAxis' [yAxis]='yAxis'
[titleSettings]='titleSettings' [cellSettings]='cellSettings' [paletteSettings]='paletteSettings' [tooltipSettings]='tooltipSettings' (tooltipRender)='tooltipRender($event)'>
</ejs-heatmap>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent{
dataSource: Object[] = [
[0.72, 0.71, 0.71, 0.67, 0.72, 0.53, 0.53, 0.56, 0.58, 0.56],
[2.28, 2.29, 2.09, 1.84, 1.64, 1.49, 1.49, 1.39, 1.32, 1.23],
[2.02, 2.17, 2.30, 2.39, 2.36, 2.52, 2.62, 2.57, 2.57, 2.74],
[3.21, 3.26, 3.45, 3.47, 3.42, 3.34, 3.14, 2.83, 2.64, 2.61],
[3.22, 3.13, 3.04, 2.95, 2.69, 2.49, 2.27, 2.18, 2.06, 1.87],
[3.30, 3.39, 3.40, 3.48, 3.60, 3.67, 3.73, 3.79, 3.79, 4.07],
[5.80, 5.74, 5.64, 5.44, 5.18, 5.08, 5.07, 5.00, 5.35, 5.47],
[6.91, 7.40, 8.13, 8.80, 9.04, 9.24, 9.43, 9.35, 9.49, 9.69]];
titleSettings: Object = {
text: 'Crude Oil Production of Non-OPEC Countries (in Million barrels per day)',
textStyle: {
size: '15px',
fontWeight: '500',
fontStyle: 'Normal',
fontFamily: 'Segoe UI'
}
};
xAxis: Object = {
labels: ['Canada', 'China', 'Egypt', 'Mexico', 'Norway', 'Russia', 'UK', 'USA']
};
yAxis: Object = {
labels: ['2000', '2001', '2002', '2003', '2004', '2005', '2006', '2007', '2008', '2009', '2010'],
};
public cellSettings: Object = {
showLabel: false,
};
public paletteSettings: Object = {
palette: [
{ color: '#F0ADCE'},
{ color: '#19307B'},
],
};
public tooltipSettings: Object = {
fill: '#696295',
textStyle: {
color: '#FFFFFF',
size: '12px'
},
border: {
width: 2,
color: '#F0C27B'
}
};
public showTooltip: Boolean = true;
public tooltipRender(args: ITooltipEventArgs): void {
args.content = ['In ' + args.yLabel + ', the ' + args.xLabel + ' produced ' + args.value + ' million barrels per day'];
};
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { HeatMapModule} from '@syncfusion/ej2-angular-heatmap';
import { TooltipService} from '@syncfusion/ej2-angular-heatmap';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, HeatMapModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [TooltipService]
})
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: To use tooltip feature, we need to inject Tooltip
using HeatMap.Inject(Tooltip)
.