ng2-pdf-viewer zoom implementation

modal.html

<ion-header>

	<ion-navbar>
		<ion-title>{{ title }}</ion-title>
		<ion-buttons end>
		    <button ion-button icon-only (click)="dismiss()">
	            <ion-icon name="close"></ion-icon>
	        </button>
	    </ion-buttons>
	</ion-navbar>

</ion-header>

<ion-content fullscreen>
	<div *ngIf="pdfSrc">
		<pdf-viewer [src]="pdfSrc" [zoom]="pdfZoom" [fit-to-page]="true" [render-text]="true"></pdf-viewer>
		<ion-fab bottom right>
			 <button ion-fab mini (click)="zoomIn()">
			 	<ion-icon name="add"></ion-icon>
			 </button>
			<button ion-fab mini (click)="zoomOut()">
			 	<ion-icon name="remove"></ion-icon>
			 </button>
			<button ion-fab mini (click)="resetZoom()">
			 	<ion-icon name="refresh"></ion-icon>
			 </button>
		</ion-fab>
	</div>

	<video width="100%" controls *ngIf="videoSrc">
		<source [src]="videoSrc">
	</video>
</ion-content>

modal.scss

page-documentation-modal {
	pdf-viewer {
		display:inline-block;
		max-width:100%;
	}
	ion-fab {
		position:fixed;
	}

	video {
		max-width: 100%;
		max-height: 100%;
	}
}

modal.ts

import { Component } from '@angular/core';

import { NavParams, ViewController } from 'ionic-angular';

const ZOOM_STEP:number = 0.25;
const DEFAULT_ZOOM:number = 1;

@Component({
  selector: 'page-documentation-modal',
  templateUrl: 'documentation-modal.html',
})
export class DocumentationModalPage
{
	public pdfSrc:string = '';
	public videoSrc:string = '';
	public title:string = '';
	public pdfZoom:number = DEFAULT_ZOOM;

	public constructor(navParams: NavParams, private viewCtrl: ViewController)
	{
		const doc = navParams.get('document');
		const video = navParams.get('video');
		if (doc) {
			this.pdfSrc = doc.source_dir;
			this.title  = doc.name;
		} else if (video) {
			this.videoSrc = video.source_dir;
			this.title    = video.name;
		} else {

		}
	}

	public zoomIn()
	{
		this.pdfZoom += ZOOM_STEP;
	}

	public zoomOut()
	{
		if (this.pdfZoom > DEFAULT_ZOOM) {
			this.pdfZoom -= ZOOM_STEP;
		}
	}

	public resetZoom()
	{
		this.pdfZoom = DEFAULT_ZOOM;
	}

	public dismiss()
	{
		this.viewCtrl.dismiss();
	}
}

amazing pdf viewer! congrats

muchas gracias. quedó perfecto !!!