Merge pull request #31 from cupidi/master

Add optional image src.

Author: Riron

src/image-viewer.directive.ts

@@ -1,5 +1,5 @@
 import { App } from 'ionic-angular';
-import { ElementRef, HostListener, Directive } from '@angular/core';
+import { ElementRef, HostListener, Directive, Input } from '@angular/core';
 
 import { ImageViewer } from './image-viewer';
 
@@ -8,6 +8,8 @@ import { ImageViewer } from './image-viewer';
 })
 export class ImageViewerDirective {
 
+	@Input('imageViewer') src: string;
+
 	constructor(
 		private _app: App,
 		private _el: ElementRef
@@ -17,7 +19,7 @@ export class ImageViewerDirective {
 	onClick($event): void {
 		let position = this._el.nativeElement.getBoundingClientRect();
 
-		let imageViewer = ImageViewer.create({image: this._el.nativeElement.src, position: position});
+		let imageViewer = ImageViewer.create({image: this.src || this._el.nativeElement.src, position: position});
 		this._app.present(imageViewer, {});
 	}
 }