assets added

imageLibrary added

angular.json

@@ -24,6 +24,11 @@
               {
                 "glob": "**/*",
                 "input": "public"
+              },
+              {
+                "glob": "**/*",
+                "input": "src/assets/",
+                "output": "/assets/"
               }
             ],
             "styles": [

src/app/imageLibrary.ts

+import { Injectable } from '@angular/core'
+import { BehaviorSubject } from 'rxjs';
+
+type imageItem = {
+  url: string ;
+  size: number;
+};
+
+@Injectable({
+  providedIn: 'root'
+})
+
+export class ImageLibrary {
+
+  private images: string[] = ["un.png", "geste.png", "pour.png",
+	"la.png", "pla.png", "ne.png", "te.png"];
+
+  getSize() {
+    return this.library.length;
+  }
+
+	public getCurrentIndex(): number {
+		return this.currentIndexObserver.getValue();
+	}
+
+	public moveToNextImage(): number {
+		this.setCurrentIndex(this.currentIndexObserver.getValue() + 1);
+		return this.currentIndexObserver.getValue();
+	}
+
+	public moveToPrevImage(): number {
+		this.setCurrentIndex(this.currentIndexObserver.getValue() - 1);
+		return this.currentIndexObserver.getValue();
+	}
+
+	public getCurrentImageUrl(): string {
+		return this.library[this.currentIndexObserver.getValue()].url;
+	}
+
+	public getCurrentImageScaleFactor(): number {
+		return this.library[this.currentIndexObserver.getValue()].size;
+	}
+
+	public setCurrentIndex(cindex: number) {
+		if ((cindex < this.library.length) && (cindex >= 0)) {
+			this.currentIndexObserver.next(cindex);
+		}
+	}
+
+	public setCurrentScaleFactor(factor: number) {
+		this.library[this.currentIndexObserver.getValue()].size = factor;
+	}
+
+  public getUrls() : string[] {
+    return this.library.map( (x) => x.url );
+  }
+
+	public constructor() {
+		this.library = new Array<imageItem>();
+		for (let i = 0; i < this.images.length; i++)
+      this.library.push({ url : "../assets/images/" + this.images[i], size : 300});
+
+	}
+
+	library: Array<imageItem>; // bibliotheque d image
+  //private currentindex: number; // index de l image courante
+  private currentIndexObserver = new BehaviorSubject<number>(0);
+  public currentImageObserver = this.currentIndexObserver.asObservable();
+}