improving lightbox

bug fixes with new image loading and fullscreen mode

frontend/app/app.module.ts

@@ -30,6 +30,7 @@ import {Config} from "./config/Config";
 import {GalleryMapComponent} from "./gallery/map/map.gallery.component";
 import {GalleryMapLightboxComponent} from "./gallery/map/lightbox/lightbox.map.gallery.component";
 import {ThumbnailManagerService} from "./gallery/thumnailManager.service";
+import {OverlayService} from "./gallery/overlay.service";
 
 @NgModule({
     imports: [
@@ -68,7 +69,8 @@ import {ThumbnailManagerService} from "./gallery/thumnailManager.service";
         AuthenticationService,
         ThumbnailLoaderService,
         ThumbnailManagerService,
-        FullScreenService],
+        FullScreenService,
+        OverlayService],
 
     bootstrap: [AppComponent]
 })

frontend/app/gallery/fullscreen.service.ts

@@ -1,9 +1,12 @@
 import {Injectable} from "@angular/core";
+import {Event} from "../../../common/event/Event";
 
 @Injectable()
 export class FullScreenService {
 
 
+    OnFullScreenChange = new Event<boolean>();
+
     public isFullScreenEnabled(): boolean {
         return !!(document.fullscreenElement || document['mozFullScreenElement'] || document.webkitFullscreenElement);
     }
@@ -22,6 +25,7 @@ export class FullScreenService {
         } else if (element.msRequestFullscreen) {
             element.msRequestFullscreen();
         }
+        this.OnFullScreenChange.trigger(true);
     }
 
     public exitFullScreen() {
@@ -36,6 +40,7 @@ export class FullScreenService {
         } else if (document.webkitExitFullscreen) {
             document.webkitExitFullscreen();
         }
+        this.OnFullScreenChange.trigger(false);
     }
 
 }

frontend/app/gallery/grid/grid.gallery.component.ts

@@ -1,13 +1,14 @@
 import {
-    Component,
-    Input,
-    ElementRef,
-    OnChanges,
-    ViewChild,
-    ViewChildren,
-    QueryList,
     AfterViewInit,
-    HostListener
+    ChangeDetectorRef,
+    Component,
+    ElementRef,
+    HostListener,
+    Input,
+    OnChanges,
+    QueryList,
+    ViewChild,
+    ViewChildren
 } from "@angular/core";
 import {PhotoDTO} from "../../../../common/entities/PhotoDTO";
 import {GridRowBuilder} from "./GridRowBuilder";
@@ -15,31 +16,33 @@ import {GalleryLightboxComponent} from "../lightbox/lightbox.gallery.component";
 import {GridPhoto} from "./GridPhoto";
 import {GalleryPhotoComponent} from "./photo/photo.grid.gallery.component";
 import {Config} from "../../config/Config";
+import {OverlayService} from "../overlay.service";
 
 @Component({
     selector: 'gallery-grid',
     templateUrl: 'app/gallery/grid/grid.gallery.component.html',
     styleUrls: ['app/gallery/grid/grid.gallery.component.css'],
 })
-export class GalleryGridComponent implements OnChanges,AfterViewInit {
+export class GalleryGridComponent implements OnChanges, AfterViewInit {
 
-    @ViewChild('gridContainer') gridContainer:ElementRef;
+    @ViewChild('gridContainer') gridContainer: ElementRef;
-    @ViewChildren(GalleryPhotoComponent) gridPhotoQL:QueryList<GalleryPhotoComponent>;
+    @ViewChildren(GalleryPhotoComponent) gridPhotoQL: QueryList<GalleryPhotoComponent>;
 
     @Input() photos: Array<PhotoDTO>;
-    @Input() lightbox:GalleryLightboxComponent;
+    @Input() lightbox: GalleryLightboxComponent;
 
-    photosToRender:Array<GridPhoto> = [];
+    photosToRender: Array<GridPhoto> = [];
-    containerWidth:number = 0;
+    containerWidth: number = 0;
 
     private IMAGE_MARGIN = 2;
     private TARGET_COL_COUNT = 5;
     private MIN_ROW_COUNT = 2;
     private MAX_ROW_COUNT = 5;
 
-    onScrollFired = false;
+    private onScrollFired = false;
+    private scrollbarWidth = 0;
 
-    constructor() {
+    constructor(private overlayService: OverlayService, private changeDetector: ChangeDetectorRef) {
     }
 
     ngOnChanges() {
@@ -61,16 +64,17 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
         }
         this.updateContainerWidth();
         this.sortPhotos();
+        //render the same amount of images on resize
+        let renderedIndex = this.renderedPhotoIndex;
         this.clearRenderedPhotos();
-        setImmediate(() => {
+        this.renderPhotos(renderedIndex);
-            this.renderPhotos();
-        });
     }
 
-    isAfterViewInit:boolean = false;
+
+    isAfterViewInit: boolean = false;
 
     ngAfterViewInit() {
-        this.lightbox.gridPhotoQL = this.gridPhotoQL;
+        this.lightbox.setGridPhotoQL(this.gridPhotoQL);
 
         //TODO: implement scroll detection
 
@@ -96,6 +100,7 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
     private clearRenderedPhotos() {
         this.photosToRender = [];
         this.renderedPhotoIndex = 0;
+        this.changeDetector.detectChanges();
     }
 
     private mergeNewPhotos() {
@@ -123,9 +128,9 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
     }
 
 
-    private renderedPhotoIndex:number = 0;
+    private renderedPhotoIndex: number = 0;
 
-    private renderPhotos() { 
+    private renderPhotos(numberOfPhotos: number = 0) {
         if (this.containerWidth == 0 || this.renderedPhotoIndex >= this.photos.length || !this.shouldRenderMore()) {
             return;
         }
@@ -133,7 +138,7 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
 
         let renderedContentHeight = 0;
 
-        while (this.renderedPhotoIndex < this.photos.length && this.shouldRenderMore(renderedContentHeight) === true) {
+        while (this.renderedPhotoIndex < this.photos.length && (this.shouldRenderMore(renderedContentHeight) === true || this.renderedPhotoIndex < numberOfPhotos)) {
             let ret = this.renderARow();
             if (ret === null) {
                 throw new Error("Gridphotos rendering failed");
@@ -149,7 +154,7 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
      * @param offset Add height to the client height (conent is not yet added to the dom, but calculate with it)
      * @returns {boolean}
      */
-    private shouldRenderMore(offset:number = 0):boolean {
+    private shouldRenderMore(offset: number = 0): boolean {
         return Config.Client.enableOnScrollRendering === false ||
             window.scrollY >= (document.body.clientHeight + offset - window.innerHeight) * 0.7
             || (document.body.clientHeight + offset) * 0.85 < window.innerHeight;
@@ -164,7 +169,7 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
                 this.renderPhotos();
 
                 if (Config.Client.enableOnScrollThumbnailPrioritising === true) {
-                    this.gridPhotoQL.toArray().forEach((pc:GalleryPhotoComponent) => {
+                    this.gridPhotoQL.toArray().forEach((pc: GalleryPhotoComponent) => {
                         pc.onScroll();
                     });
                 }
@@ -174,15 +179,16 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
         }
     }
 
-    public renderARow():number {
+    public renderARow(): number {
         if (this.renderedPhotoIndex >= this.photos.length) {
             return null;
         }
 
+
         let maxRowHeight = window.innerHeight / this.MIN_ROW_COUNT;
         let minRowHeight = window.innerHeight / this.MAX_ROW_COUNT;
 
-        let photoRowBuilder = new GridRowBuilder(this.photos, this.renderedPhotoIndex, this.IMAGE_MARGIN, this.containerWidth);
+        let photoRowBuilder = new GridRowBuilder(this.photos, this.renderedPhotoIndex, this.IMAGE_MARGIN, this.containerWidth - this.overlayService.getPhantomScrollbarWidth());
         photoRowBuilder.addPhotos(this.TARGET_COL_COUNT);
         photoRowBuilder.adjustRowHeightBetween(minRowHeight, maxRowHeight);
 
@@ -198,7 +204,7 @@ export class GalleryGridComponent implements OnChanges,AfterViewInit {
         return rowHeight;
     }
 
-    private updateContainerWidth():number {
+    private updateContainerWidth(): number {
         if (!this.gridContainer) {
             return;
         }

frontend/app/gallery/lightbox/lightbox.gallery.component.html

@@ -37,9 +37,11 @@
             <span class="glyphicon glyphicon-remove highlight" (click)="hide()" title="close"></span>
         </div>
 
-        <div class="navigation-arrow highlight" *ngIf="navigation.hasPrev" id="leftArrow" (click)="prevImage()"><span
+        <div class="navigation-arrow highlight" *ngIf="navigation.hasPrev" title="key: left arrow" id="leftArrow"
+             (click)="prevImage()"><span
                 class="glyphicon glyphicon-chevron-left"></span></div>
-        <div class="navigation-arrow highlight" *ngIf="navigation.hasNext" id="rightArrow" (click)="nextImage()"><span
+        <div class="navigation-arrow highlight" *ngIf="navigation.hasNext" title="key: right arrow" id="rightArrow"
+             (click)="nextImage()"><span
                 class="glyphicon glyphicon-chevron-right"></span></div>
     </div>
 </div>

frontend/app/gallery/lightbox/lightbox.gallery.component.ts

@@ -1,8 +1,19 @@
-import {Component, QueryList, Output, EventEmitter, HostListener, ElementRef, ViewChild} from "@angular/core";
+import {
+    ChangeDetectorRef,
+    Component,
+    ElementRef,
+    EventEmitter,
+    HostListener,
+    Output,
+    QueryList,
+    ViewChild
+} from "@angular/core";
 import {PhotoDTO} from "../../../../common/entities/PhotoDTO";
 import {GalleryPhotoComponent} from "../grid/photo/photo.grid.gallery.component";
 import {Dimension} from "../../model/IRenderable";
 import {FullScreenService} from "../fullscreen.service";
+import {OverlayService} from "../overlay.service";
+import {Subscription} from "rxjs";
 
 @Component({
     selector: 'gallery-lightbox',
@@ -19,62 +30,80 @@ export class GalleryLightboxComponent {
     public blackCanvasOpacity: any = 0;
 
     private activePhoto: GalleryPhotoComponent;
-    public gridPhotoQL: QueryList<GalleryPhotoComponent>;
+    private gridPhotoQL: QueryList<GalleryPhotoComponent>;
 
     private visible = false;
+    private changeSubscription: Subscription = null;
 
     @ViewChild("root") elementRef: ElementRef;
 
 
-    constructor(private fullScreenService: FullScreenService) {
+    constructor(private fullScreenService: FullScreenService, private changeDetector: ChangeDetectorRef, private overlayService: OverlayService) {
+    }
 
 
+    //noinspection JSUnusedGlobalSymbols
+    @HostListener('window:resize', ['$event'])
+    onResize() {
+        if (this.activePhoto) {
+            this.disableAnimation();
+            this.lightboxDimension.width = this.getScreenWidth();
+            this.lightboxDimension.height = this.getScreenHeight();
+            this.updateActivePhoto(this.activePhotoId);
+        }
     }
 
     public nextImage() {
-
         this.disableAnimation();
-        let pcList = this.gridPhotoQL.toArray();
+        if (this.activePhotoId + 1 < this.gridPhotoQL.length) {
-        for (let i = 0; i < pcList.length; i++) {
+            this.showPhoto(this.activePhotoId + 1);
-            if (pcList[i] === this.activePhoto) {
+            if (this.activePhotoId + 3 >= this.gridPhotoQL.length) {
-                if (i + 1 < pcList.length) {
+                this.onLastElement.emit({}); //trigger to render more photos if there are
-                    this.showPhoto(pcList[i + 1]);
-
-                    if (i + 3 === pcList.length) {
-                        this.onLastElement.emit({}); //trigger to render more photos if there are
-                    }
-                }
-                return;
             }
+            return;
         }
+        console.warn("can't find photo to show next");
     }
 
     public prevImage() {
         this.disableAnimation();
-        let pcList = this.gridPhotoQL.toArray();
+        if (this.activePhotoId > 0) {
-        for (let i = 0; i < pcList.length; i++) {
+            this.showPhoto(this.activePhotoId - 1);
-            if (pcList[i] === this.activePhoto) {
+            return;
-                if (i > 0) {
-                    this.showPhoto(pcList[i - 1]);
-                }
-                return;
-            }
         }
+        console.warn("can't find photo to show prev");
     }
 
 
-    private showPhoto(photoComponent: GalleryPhotoComponent) {
+    activePhotoId: number = null;
+
+    private showPhoto(photoIndex: number) {
+        this.activePhoto = null;
+        this.changeDetector.detectChanges();
+        this.updateActivePhoto(photoIndex);
+    }
+
+    private updateActivePhoto(photoIndex: number) {
         let pcList = this.gridPhotoQL.toArray();
 
-        let index = pcList.indexOf(photoComponent);
+
-        if (index == -1) {
+        if (photoIndex < 0 || photoIndex > this.gridPhotoQL.length) {
             throw new Error("Can't find the photo");
         }
+        this.activePhotoId = photoIndex;
+        this.activePhoto = pcList[photoIndex];
+
+        this.photoDimension = this.calcLightBoxPhotoDimension(this.activePhoto.gridPhoto.photo);
+        this.navigation.hasPrev = photoIndex > 0;
+        this.navigation.hasNext = photoIndex + 1 < pcList.length;
+
+        let to = this.activePhoto.getDimension();
+
+        //if target image out of screen -> scroll to there
+        if (this.getBodyScrollTop() > to.top || this.getBodyScrollTop() + this.getScreenHeight() < to.top) {
+            this.setBodyScrollTop(to.top);
+        }
 
-        this.photoDimension = this.calcLightBoxPhotoDimension(photoComponent.gridPhoto.photo);
-        this.navigation.hasPrev = index > 0;
-        this.navigation.hasNext = index + 1 < pcList.length;
-        this.activePhoto = photoComponent;
     }
 
     public show(photo: PhotoDTO) {
@@ -90,8 +119,8 @@ export class GalleryLightboxComponent {
         this.blackCanvasOpacity = 0;
         this.photoDimension = selectedPhoto.getDimension();
 
-        document.getElementsByTagName('body')[0].style.overflow = 'hidden';
+        //disable scroll
-
+        this.overlayService.showOverlay();
         setImmediate(() => {
             this.lightboxDimension = <Dimension>{
                 top: 0,
@@ -100,19 +129,13 @@ export class GalleryLightboxComponent {
                 height: this.getScreenHeight()
             };
             this.blackCanvasOpacity = 1.0;
-            this.showPhoto(selectedPhoto);
+            this.showPhoto(this.gridPhotoQL.toArray().indexOf(selectedPhoto));
         });
     }
 
     public hide() {
         this.enableAnimation();
         this.fullScreenService.exitFullScreen();
-        let to = this.activePhoto.getDimension();
-
-        //iff target image out of screen -> scroll to there
-        if (this.getBodyScrollTop() > to.top || this.getBodyScrollTop() + this.getScreenHeight() < to.top) {
-            this.setBodyScrollTop(to.top);
-        }
 
         this.lightboxDimension = this.activePhoto.getDimension();
         this.lightboxDimension.top -= this.getBodyScrollTop();
@@ -121,13 +144,24 @@ export class GalleryLightboxComponent {
         setTimeout(() => {
             this.visible = false;
             this.activePhoto = null;
-            document.getElementsByTagName('body')[0].style.overflow = 'scroll';
+            this.overlayService.hideOverlay();
         }, 500);
 
-
     }
 
 
+    setGridPhotoQL(value: QueryList<GalleryPhotoComponent>) {
+        if (this.changeSubscription != null) {
+            this.changeSubscription.unsubscribe();
+        }
+        this.gridPhotoQL = value;
+        this.changeSubscription = this.gridPhotoQL.changes.subscribe(() => {
+            if (this.activePhotoId != null && this.gridPhotoQL.length > this.activePhotoId) {
+                this.updateActivePhoto(this.activePhotoId);
+            }
+        });
+    }
+
     private findPhotoComponent(photo: any) {
         let galleryPhotoComponents = this.gridPhotoQL.toArray();
         for (let i = 0; i < galleryPhotoComponents.length; i++) {
@@ -138,15 +172,26 @@ export class GalleryLightboxComponent {
         return null;
     }
 
+    //noinspection JSUnusedGlobalSymbols
     @HostListener('window:keydown', ['$event'])
     onKeyPress(e: KeyboardEvent) {
+        if (this.visible != true) {
+            return;
+        }
         let event: KeyboardEvent = window.event ? <any>window.event : e;
         switch (event.keyCode) {
             case 37:
-                this.prevImage();
+                if (this.activePhotoId > 0) {
+                    this.prevImage();
+                }
                 break;
             case 39:
-                this.nextImage();
+                if (this.activePhotoId < this.gridPhotoQL.length - 1) {
+                    this.nextImage();
+                }
+                break;
+            case 27: //escape
+                this.hide();
                 break;
         }
     }

frontend/app/gallery/lightbox/photo/photo.lightbox.gallery.component.html

@@ -4,12 +4,13 @@
          [style.height.%]="imageSize.height"
          [src]="thumbnailPath()"/>
 
-    <img *ngIf="gridPhoto"
+    <img *ngIf="gridPhoto !== null"
          [style.width.%]="imageSize.width"
          [style.height.%]="imageSize.height"
          [src]="gridPhoto.getPhotoPath()"
          (load)="onImageLoad()"
          (error)="onImageError()"/>
+
 </div>
 
 

frontend/app/gallery/lightbox/photo/photo.lightbox.gallery.component.ts

@@ -1,4 +1,4 @@
-import {Component, OnChanges, Input, ViewChild, ElementRef} from "@angular/core";
+import {Component, Input, OnChanges} from "@angular/core";
 import {GridPhoto} from "../../grid/GridPhoto";
 
 @Component({
@@ -8,12 +8,11 @@ import {GridPhoto} from "../../grid/GridPhoto";
 })
 export class GalleryLightboxPhotoComponent implements OnChanges {
 
-    @Input() gridPhoto:GridPhoto;
+    @Input() gridPhoto: GridPhoto;
 
     public imageSize = {width: "auto", height: "100"};
-    @ViewChild('imgContainer') nativeElement:ElementRef;
 
-    imageLoaded:boolean = false;
+    imageLoaded: boolean = false;
 
     constructor() {
     }
@@ -48,12 +47,12 @@ export class GalleryLightboxPhotoComponent implements OnChanges {
         console.error("cant load image");
     }
 
-    public showThumbnail():boolean {
+    public showThumbnail(): boolean {
         return this.gridPhoto && !this.imageLoaded &&
             (this.gridPhoto.isThumbnailAvailable() || this.gridPhoto.isReplacementThumbnailAvailable());
     }
 
-    public thumbnailPath():string {
+    public thumbnailPath(): string {
         if (this.gridPhoto.isThumbnailAvailable() === true)
             return this.gridPhoto.getThumbnailPath();
 

frontend/app/gallery/map/lightbox/lightbox.map.gallery.component.ts

@@ -1,9 +1,9 @@
-import {Component, Input, OnChanges, ElementRef, ViewChild} from "@angular/core";
+import {Component, ElementRef, HostListener, Input, OnChanges, ViewChild} from "@angular/core";
 import {PhotoDTO} from "../../../../../common/entities/PhotoDTO";
 import {Dimension} from "../../../model/IRenderable";
 import {FullScreenService} from "../../fullscreen.service";
 import {SebmGoogleMap} from "angular2-google-maps/core";
-import {ThumbnailManagerService, IconThumbnail} from "../../thumnailManager.service";
+import {IconThumbnail, ThumbnailManagerService} from "../../thumnailManager.service";
 import {IconPhoto} from "../../IconPhoto";
 
 @Component({
@@ -138,6 +138,20 @@ export class GalleryMapLightboxComponent implements OnChanges {
         return window.innerHeight;
     }
 
+    //noinspection JSUnusedGlobalSymbols
+    @HostListener('window:keydown', ['$event'])
+    onKeyPress(e: KeyboardEvent) {
+        if (this.visible != true) {
+            return;
+        }
+        let event: KeyboardEvent = window.event ? <any>window.event : e;
+        switch (event.keyCode) {
+            case 27: //escape
+                this.hide();
+                break;
+        }
+    }
+
 
 }
 

frontend/app/gallery/overlay.service.ts

@@ -0,0 +1,60 @@
+import {Injectable} from "@angular/core";
+import {Event} from "../../../common/event/Event";
+
+@Injectable()
+export class OverlayService {
+
+    OnOverlayChange = new Event<boolean>();
+    private scrollWidth: number = null;
+
+    public showOverlay() {
+
+        //disable scrolling
+        document.getElementsByTagName('body')[0].style.overflow = 'hidden';
+        this.OnOverlayChange.trigger(true);
+    }
+
+    public hideOverlay() {
+
+        document.getElementsByTagName('body')[0].style.overflowY = 'scroll';
+        this.OnOverlayChange.trigger(false);
+    }
+
+    getScrollbarWidth() {
+        if (this.scrollWidth == null) {
+
+
+            let outer = document.createElement("div");
+            outer.style.visibility = "hidden";
+            outer.style.width = "100px";
+            outer.style.msOverflowStyle = "scrollbar"; // needed for WinJS apps
+
+            document.body.appendChild(outer);
+
+            let widthNoScroll = outer.offsetWidth;
+            // force scrollbars
+            outer.style.overflow = "scroll";
+
+            // add innerdiv
+            let inner = document.createElement("div");
+            inner.style.width = "100%";
+            outer.appendChild(inner);
+
+            let widthWithScroll = inner.offsetWidth;
+
+            // remove divs
+            outer.parentNode.removeChild(outer);
+            this.scrollWidth = widthNoScroll - widthWithScroll;
+        }
+
+        return this.scrollWidth;
+    }
+
+    getPhantomScrollbarWidth() {
+        if (document.getElementsByTagName('body')[0].style.overflow == 'hidden') {
+            return this.getScrollbarWidth();
+        }
+        return 0;
+    }
+
+}