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Levels in Angular TreeMap component

14 Apr 2021 / 9 minutes to read

You can give ‘n’ number of levels to the tree map. Each level can be separated using the [groupPath] property.

The following customization options are available to customize the tree map levels.

Group path

The [groupPath] property is used to separate each level in tree map. The GroupPath accepts a field in dataSource.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;' height='350px' [dataSource]='data' weightValuePath='EmployeesCount' [palette]='palette'
    [levels]='levels'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
    { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
    ];
    public levels: object[]= [
        { groupPath: 'Country', border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobDescription', border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobGroup', border: { color: 'black', width: 0.5 } },
    ]
    public palette: object =["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"],
    }
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, TreeMapModule, TreeMapAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [TreeMapLegendService, TreeMapTooltipService]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Group gap

The [groupGap] property is used to separate an item from every group or another item to differentiate the levels mentioned in the tree map.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;' height='350px' [dataSource]='data' weightValuePath='EmployeesCount' [palette]='palette'
    [levels]='levels'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
    { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
    ];
    public levels: object[]= [
        { groupPath: 'Country', groupGap:10, border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobDescription', groupGap:10, border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobGroup', groupGap:10, border: { color: 'black', width: 0.5 } },
    ]
    public palette: object =["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"],
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, TreeMapModule, TreeMapAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [TreeMapLegendService, TreeMapTooltipService]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Header format and alignment

You can customize header using the [headerFormat] property in which fields are mapping from the dataSource. You can also align header using the [headerAlignment] property.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;' height='350px' [dataSource]='data' weightValuePath='EmployeesCount' [palette]='palette'
    [levels]='levels'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
    { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
    ];
    public levels: object[]= [
        { groupPath: 'Country', headerFormat:'${Country}-${EmployeesCount}',
        headerAlignment:'Center', border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobDescription',headerFormat:'${JobDescription}-${EmployeesCount}', headerAlignment:'Far', border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobGroup', headerAlignment:'Near',
        headerFormat:'${JobGroup}-${EmployeesCount}', border: { color: 'black', width: 0.5 } },
    ]
    public palette: object =["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"],
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, TreeMapModule, TreeMapAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [TreeMapLegendService, TreeMapTooltipService]
})
export class AppModule { }
Copied to clipboard
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Header height and style

You can customize the font color, family, weight, and size using the [headerStyle] property. Based on font size, the header height can be given using the [headerHeight] property.

Source
Preview
app.component.ts
app.module.ts
main.ts
Copied to clipboard
import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;' height='350px' [dataSource]='data' weightValuePath='EmployeesCount' [palette]='palette'
    [levels]='levels'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
    { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
    ];
    public levels: object[]= [
        { groupPath: 'Country', headerHeight:35, headerStyle:{ size:'15px' }, border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobDescription',headerHeight:45, headerStyle:{ size:'15px' }, border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobGroup',headerHeight:40, headerStyle:{ size:'15px' }, border: { color: 'black', width: 0.5 } },
    ]
    public palette: object =["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"],
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, TreeMapModule, TreeMapAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [TreeMapLegendService, TreeMapTooltipService]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Header template and position

The treemap header supports to customize header of each item using the [headerTemplate] property. It uses Essential JS2 Template engine to render the elements. You can position the template using the [templatePosition] property.

The template concepts are illustrated in the following example.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;' height='350px' [dataSource]='data' weightValuePath='EmployeesCount' [palette]='palette'
    [levels]='levels'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
    { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
    { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
    { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
    { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
    ];
    public levels: object[]= [
        { groupPath: 'Country',headerTemplate:'<div>{{:Country}}</div>', headerPosition:'Center', border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobDescription',headerTemplate:'<div>{{:JobDescription}}</div>', headerPosition:'Center', border: { color: 'black', width: 0.5 } },
        { groupPath: 'JobGroup',headerTemplate:'<div>{{:JobGroup}}</div>', headerPosition:'Far', border: { color: 'black', width: 0.5 } },
    ]
    public palette: object =["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"],
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, TreeMapModule, TreeMapAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
	providers: [TreeMapLegendService, TreeMapTooltipService]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);