Monday, 24 October 2016

Create a Print Component in Angular2 which will print the user defined HTML element in DOM using Typescript (Print component)

In this post we are going to see how to create a Print component which will print the user defined element in DOM using the Typescript, for this first we have to create a Print component then we have to use that component in another component, later we will get a print button in the screen, then when we click the print button, we can find the print of that particular area in the printer.








Component:


import {    Component,ViewEncapsulation,
            Input,Output,OnChanges,ElementRef,
            EventEmitter } from '@angular/core';

@Component({
    selector:'print-page',
    encapsulation:ViewEncapsulation.None,
    template:`
     <button (click)="printDiv()" 
        class="btn btn-sm btn-primary">Print</button>
     <div id="printpage">
     </div>
    `,
    styles:[`
    @media screen {
        #printpage, #printpage * {
            display:none;
        }
    }
      @media print {
          body *{
              visibility:hidden;
              background: transparent;
            -webkit-print-color-adjust: exact !important; 
          }
          
          #printpage, #printpage *{
              visibility:visible;
               -webkit-print-color-adjust: exact !important; 
                box-shadow: inset 0 0 0 1000px gold;
          }

          #printpage{
            position:absolute;
            left:0;
            top:0;             
          }
      }
    `]

})
export class PrintComponent implements OnChanges{
    
    @Input('section') section:string;
    @Output() sectionChange = new EventEmitter<any>(); 

    constructor(private ele:ElementRef){
        if(this.section===undefined)
            this.section = '';
    }

    ngOnChanges(changes){
        if(changes.section && changes.section.currentValue!==undefined
        && changes.section.currentValue!==''){
           
        }
    }

    afterPrint(){
        console.log("after print");
        this.ele.nativeElement.children[0].innerHTML = '';
        this.sectionChange.emit(''); 
        this.section = '';
        
    }
 

    printDiv() {

        if(this.section && this.section != undefined && this.section!='') {
            var printContents = document.getElementById(this.section).innerHTML;
            var originalContents = document.body.innerHTML;      

        if(window){
            if (navigator.userAgent.toLowerCase().indexOf('chrome') > -1) {
                var popup = window.open('', '_blank', 
                'width=600,height=600,scrollbars=no,menubar=no,toolbar=no,'
                +'location=no,status=no,titlebar=no');
               
                popup.window.focus();
                popup.document.write('<!DOCTYPE html><html><head>  '
        +'<link rel="stylesheet" href="node_modules/bootstrap/dist/css/bootstrap.css" '
        +'media="screen,print">'
        +'<link rel="stylesheet" href="style.css" media="screen,print">'             
        +    '</head><body onload="window.print()"><div class="reward-body">' 
        + printContents + '</div></html>');
                popup.onbeforeunload = function (event) {           
                    popup.close();          
                    return '.\n';
                };
                popup.onabort = function (event) {             
                    popup.document.close();           
                    popup.close();         
                }
            } else {
                var popup = window.open('', '_blank', 'width=800,height=600');
                popup.document.open();
                popup.document.write('<html><head>'+
        +'<link rel="stylesheet" href="node_modules/bootstrap/dist/css/bootstrap.css"'
        +' media="all">'
        +'<link rel="stylesheet" href="style.css" media="all">'                
        +'</head><body onload="window.print()">' + printContents + '</html>');
                popup.document.close();
            }

             popup.document.close();
            }
            return true;
        }
    }

fetchStylesheets(){
     var output:string= '';
     for(var i=0;i<document.styleSheets.length;i++){
       output = output +' <link rel="stylesheet" type="text/css" href="'+    
                window.document.styleSheets[0].href +'" /> ';
     }
     return output;
 }

 fetchscriptSheets(){
     var output:string= '';
     for(var i=0;i<document.scripts.length;i++){
       output = output +' <script type="text/javascript" src="'+    
                window.document.scripts[0].src +'" /> ';
     }
     return output;
 }
   
}




In the above component you may notice one things i am created a two methods fetch the stylesheets , scripts, but i didnt use it, if you want to use in the output to load the scripts in printing then you can added that in the execution .


using the print component in another employee component:, for more detail reference about the employee component 
please refer previous post. for service and model data



import { Component } from '@angular/core';
import { DataService } from './data.service';
import { IUser } from './user'

@Component({
    selector:'employee',
    template:`
    <div style="display:inline-block;width:400px;vertical-align:top">
        <h1>Employee </h1>
        <div>
            <input type="text" #emp />
            <button (click)="addEmployee(emp.value)" 
                class="btn btn-sm btn-primary">Add Emp</button>
            <button (click)="getEmployee()" 
                class="btn btn-sm btn-primary">Get Employees</button>
            <div style="margin-top:20px">
            <ul class="list-group" style="display:-webkit-box;overflow-x:scroll">
                <li class="panel list-group-item-primary" 
                *ngFor="let e of employees" style="list-style:none;">
                <div class="panel panel-default">
                <div class="panel-heading">
                    <h3 class="panel-title">{{e.username}}</h3>
                </div>
                <div class=""panel-body>
                    <div class="text-info" style="padding:5px;">{{e.name}} 
                    <span class="btn btn-sm btn-primary" 
                        (click)="getAlbum(e.id)">Get Album</span></div>
                    <div class="text-primary" style="padding:5px;"> 
                        {{e.address.city}},{{e.address.zipcode}}</div>
                    <div *ngIf="e.albums">
                    <ul class="list-group">
                    <li class="list-group-item" *ngFor="let alb of e.albums">
                        <div class="panel panel-default">
                            <div class="panel-heading">{{alb.title}}</div>
                            <div class=""panel-body>                       
                                <img [src]="alb.thumbnailUrl" />
                            </div>
                        </div>
                    </li>
                    </ul>
                    </div>
                </div>
                </div>
                </li>
            </ul>
            </div>
        </div>
    </div>
    `   
})
export class EmployeeComponent
{
    employees:IUser[];
  
    constructor(private dataservice:DataService){
        
    }

    addEmployee(employeeName)
    {
        this.dataservice.addEmployee(employeeName);
    }

    getEmployee(){
        this.dataservice.getEmployees()
        .subscribe(
            customer=>this.employees=customer,
            error=>console.log("error"+error)
            );
       
    }

    getAlbum(id){
        this.dataservice.getAlbums(id)
        .subscribe(
            albums=>this.employees.find(emp=>emp.id==id).albums = albums
            );
    }
}


When user click on the get album, it will fetch information about the particular user id's album , then click print button 

Output:


















After click the print button , the view of the print screen















From this post you can learn how to create a print component in the angular2 using the Typescript which will print the user defined element in the DOM 




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