Print and export in Angular Treemap component

27 Apr 202416 minutes to read

Print

To use the print functionality, we should inject the PrintService into the @NgModule.providers and set the allowPrint property to true. The rendered treemap can be printed directly from the browser by calling the method print.

app.component.ts

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap'



import { TreeMap } from '@syncfusion/ej2-treemap';
import { Component, ViewChild} from '@angular/core';
import { PrintService } from '@syncfusion/ej2-angular-treemap';
@Component({
imports: [
         TreeMapModule, TreeMapAllModule
    ],

providers: [TreeMapLegendService, TreeMapTooltipService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-treemap id='container' #treemap [allowPrint]=true style='display: block;'  [dataSource]='data' weightValuePath='GDP'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>  <div>
    <button id="togglebtn2" (click)='print()'>Print</button>
    </div>`,
    providers: [PrintService]
})
export class AppComponent {
    @ViewChild('treemap')
    public treemap?: TreeMap;
    public data: object[] = [
    {State:"United States", GDP:17946, percentage:11.08, Rank:1},
    {State:"China", GDP:10866, percentage: 28.42, Rank:2},
    {State:"Japan", GDP:4123, percentage:-30.78, Rank:3},
    {State:"Germany", GDP:3355, percentage:-5.19, Rank:4},
    {State:"United Kingdom", GDP:2848, percentage:8.28, Rank:5},
    {State:"France", GDP:2421, percentage:-9.69, Rank:6},
    {State:"India", GDP:2073, percentage:13.65, Rank:7},
    {State:"Italy", GDP:1814, percentage:-12.45, Rank:8},
    {State:"Brazil", GDP:1774, percentage:-27.88, Rank:9},
    {State:"Canada", GDP:1550, percentage:-15.02, Rank:10}
    ];
    public leafItemSettings: object = {
        labelPath: 'State',
            labelFormat: '${State}<br>$${GDP} Trillion<br>(${percentage} %)',
            labelStyle: {
                color: '#000000'
            },
            border: {
                color: '#000000',
                width: 0.5
            },
    };
    public print() {
        this.treemap!.print();
    }
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Export

Image Export

To use the image export functionality, we should inject the ImageExportService into the @NgModule.providers and set the allowImageExport property to true. The rendered treemap can be exported as an image using the export method. The method requires two parameters: image type and file name. The treemap can be exported as an image in the following formats.

• JPEG
• PNG
• SVG

app.component.ts

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap'



import { TreeMap } from '@syncfusion/ej2-treemap';
import { Component, ViewChild } from '@angular/core';
import { ImageExportService } from '@syncfusion/ej2-angular-treemap';
@Component({
imports: [
         TreeMapModule, TreeMapAllModule
    ],

providers: [TreeMapLegendService, TreeMapTooltipService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-treemap id='container' #treemap [allowImageExport]=true style='display: block;' [dataSource]='data' weightValuePath='GDP'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>  <div>
    <button id="togglebtn2"  (click)='export()'>Export</button>
    </div>`,
    providers: [ImageExportService]
})
export class AppComponent {
    @ViewChild('treemap')
    public treemap?: TreeMap;
    public data: object[] = [
    {State:"United States", GDP:17946, percentage:11.08, Rank:1},
    {State:"China", GDP:10866, percentage: 28.42, Rank:2},
    {State:"Japan", GDP:4123, percentage:-30.78, Rank:3},
    {State:"Germany", GDP:3355, percentage:-5.19, Rank:4},
    {State:"United Kingdom", GDP:2848, percentage:8.28, Rank:5},
    {State:"France", GDP:2421, percentage:-9.69, Rank:6},
    {State:"India", GDP:2073, percentage:13.65, Rank:7},
    {State:"Italy", GDP:1814, percentage:-12.45, Rank:8},
    {State:"Brazil", GDP:1774, percentage:-27.88, Rank:9},
    {State:"Canada", GDP:1550, percentage:-15.02, Rank:10}
    ];
    public leafItemSettings: object = {
        labelPath: 'State',
            labelFormat: '${State}<br>$${GDP} Trillion<br>(${percentage} %)',
            labelStyle: {
                color: '#000000'
            },
            border: {
                color: '#000000',
                width: 0.5
            },
    };
    public export() {
        this.treemap!.export('PNG', 'TreeMap');
        };
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

We can get the image file as base64 string for the JPEG and PNG formats. The treemap can be exported to image as a base64 string using the export method. There are four parameters required: image type, file name, orientation of the exported PDF document which must be set as null for image export and finally allowDownload which should be set as false to return base64 string.

app.component.ts

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap'



import { TreeMap } from '@syncfusion/ej2-treemap';
import { Component, ViewChild } from '@angular/core';
import { ImageExportService } from '@syncfusion/ej2-angular-treemap';
@Component({
imports: [
         TreeMapModule, TreeMapAllModule
    ],

providers: [TreeMapLegendService, TreeMapTooltipService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-treemap id='container' #treemap [allowImageExport]=true style='display: block;' [dataSource]='data' weightValuePath='GDP'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>  <div>
    <button id="togglebtn2"  (click)='export()'>Export</button>
    </div>`,
    providers: [ImageExportService]
})
export class AppComponent {
    @ViewChild('treemap')
    public treemap?: TreeMap;
    public data: object[] = [
    {State:"United States", GDP:17946, percentage:11.08, Rank:1},
    {State:"China", GDP:10866, percentage: 28.42, Rank:2},
    {State:"Japan", GDP:4123, percentage:-30.78, Rank:3},
    {State:"Germany", GDP:3355, percentage:-5.19, Rank:4},
    {State:"United Kingdom", GDP:2848, percentage:8.28, Rank:5},
    {State:"France", GDP:2421, percentage:-9.69, Rank:6},
    {State:"India", GDP:2073, percentage:13.65, Rank:7},
    {State:"Italy", GDP:1814, percentage:-12.45, Rank:8},
    {State:"Brazil", GDP:1774, percentage:-27.88, Rank:9},
    {State:"Canada", GDP:1550, percentage:-15.02, Rank:10}
    ];
    public leafItemSettings: object = {
        labelPath: 'State',
            labelFormat: '${State}<br>$${GDP} Trillion<br>(${percentage} %)',
            labelStyle: {
                color: '#000000'
            },
            border: {
                color: '#000000',
                width: 0.5
            },
    };
     public export() {
        const promise = this.treemap!.export('PNG','TreeMap',undefined,false);
        promise.then((data)=>{
            document.writeln(data);
          })
        };
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

PDF Export

To use the PDF export functionality, we should inject the PdfExportService into the @NgModule.providers and set the allowPdfExport property to true. The rendered treemap can be exported as PDF using the export method. The export method requires three parameters: file type, file name and orientation of the PDF document. The orientation setting is optional and 0 indicates portrait and 1 indicates landscape.

app.component.ts

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap'



import { TreeMap } from '@syncfusion/ej2-treemap';
import { Component, ViewChild } from '@angular/core';
import { PdfExportService } from '@syncfusion/ej2-angular-treemap';
@Component({
imports: [
         TreeMapModule, TreeMapAllModule
    ],

providers: [TreeMapLegendService, TreeMapTooltipService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-treemap id='container' #treemap [allowPdfExport]=true style='display: block;' [dataSource]='data' weightValuePath='GDP'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>  <div>
    <button id="togglebtn2"  (click)='export()'>Export</button>
    </div>`,
    providers: [PdfExportService]
})
export class AppComponent {
    @ViewChild('treemap')
    public treemap?: TreeMap;
    public data: object[] = [
    {State:"United States", GDP:17946, percentage:11.08, Rank:1},
    {State:"China", GDP:10866, percentage: 28.42, Rank:2},
    {State:"Japan", GDP:4123, percentage:-30.78, Rank:3},
    {State:"Germany", GDP:3355, percentage:-5.19, Rank:4},
    {State:"United Kingdom", GDP:2848, percentage:8.28, Rank:5},
    {State:"France", GDP:2421, percentage:-9.69, Rank:6},
    {State:"India", GDP:2073, percentage:13.65, Rank:7},
    {State:"Italy", GDP:1814, percentage:-12.45, Rank:8},
    {State:"Brazil", GDP:1774, percentage:-27.88, Rank:9},
    {State:"Canada", GDP:1550, percentage:-15.02, Rank:10}
    ];
    public leafItemSettings: object = {
        labelPath: 'State',
            labelFormat: '${State}<br>$${GDP} Trillion<br>(${percentage} %)',
            labelStyle: {
                color: '#000000'
            },
            border: {
                color: '#000000',
                width: 0.5
            },
    };
    public export() {
        this.treemap!.export('PDF', 'TreeMap', 0);
        };
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

The exporting of the treemap as base64 string is not supported in the PDF export.