Gauge print and export in Angular Circular gauge component

23 Sep 20239 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 circular gauge can be printed directly from the browser by calling the method print.

app.component.ts

import { Component, OnInit, ViewChild } from '@angular/core';
import { PrintService, CircularGaugeComponent } from '@syncfusion/ej2-angular-circulargauge';
@Component({
    selector: 'app-container',
    template:
    `<ejs-circulargauge id="circular-container" [allowPrint]=true #gauge>
    </ejs-circulargauge><div> <button id='print' (click)='print()'>Print</button></div>`,
    providers: [PrintService]
})
export class AppComponent implements OnInit {
    @ViewChild('gauge')
    public gaugeObj?: CircularGaugeComponent;
    ngOnInit(): void {
        // ngOnInit code here
      }

      public print(): void {
        this.gaugeObj!.print();
      }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { CircularGaugeModule } from '@syncfusion/ej2-angular-circulargauge';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, CircularGaugeModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
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);

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 circular gauge can be exported as an image using the export method. The method requires two parameters: image type and file name. The circular gauge can be exported as an image in the following formats.

• JPEG
• PNG
• SVG

app.component.ts

import { Component, OnInit, ViewChild } from '@angular/core';
import { ImageExportService, CircularGaugeComponent } from '@syncfusion/ej2-angular-circulargauge';
@Component({
    selector: 'app-container',
    template:
    `<ejs-circulargauge id="circular-container" [allowImageExport]=true #gauge>
    </ejs-circulargauge><div> <button  id='export' (click)='export()'>Export</button></div>`,
    providers: [ImageExportService]
})
export class AppComponent implements OnInit {
    @ViewChild('gauge')
    public gaugeObj?: CircularGaugeComponent;
    ngOnInit(): void {
        // ngOnInit code here
      }

      public export(): void {
        this.gaugeObj!.print();
      }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { CircularGaugeModule } from '@syncfusion/ej2-angular-circulargauge';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, CircularGaugeModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
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);

We can get the image file as base64 string for the JPEG and PNG formats. The circular gauge 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 { Component, OnInit, ViewChild } from '@angular/core';
import { ImageExportService, CircularGaugeComponent } from '@syncfusion/ej2-angular-circulargauge';
@Component({
    selector: 'app-container',
    template:
    `<ejs-circulargauge id="circular-container" [allowImageExport]=true #gauge>
    </ejs-circulargauge>
    <div><button  id='export' (click)='export()'>Export</button></div>`,
    providers: [ImageExportService]
})
export class AppComponent implements OnInit {
    @ViewChild('gauge')
    public gaugeObj?: CircularGaugeComponent;
    ngOnInit(): void {

    }
    public export() {
        const promise = this.gaugeObj!.export('PNG','Gauge',undefined,false);
        promise.then((data)=> {
            document.writeln(data);
        })
    }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { CircularGaugeModule } from '@syncfusion/ej2-angular-circulargauge';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, CircularGaugeModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
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);

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 circular gauge 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 { Component, OnInit, ViewChild } from '@angular/core';
import {PdfExportService, CircularGaugeComponent} from '@syncfusion/ej2-angular-circulargauge';
@Component({
    selector: 'app-container',
    template:
    `<ejs-circulargauge id="circular-container" [allowPdfExport]=true #gauge>
    </ejs-circulargauge><div> <button  id='export' (click)='export()'>Export</button></div>`,
    providers: [PdfExportService]
})
export class AppComponent implements OnInit {
    @ViewChild('gauge')
    public gaugeObj?: CircularGaugeComponent;
    ngOnInit(): void {

    }
    public export() {
        this.gaugeObj!.export('PDF', 'Gauge', 0);
    };
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { CircularGaugeModule } from '@syncfusion/ej2-angular-circulargauge';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, CircularGaugeModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
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);

Note: The exporting of the circular gauge as base64 string is not supported in the PDF export.