Feature #5207 updated. Image Preview is available for any image of a folder using arrows previous/next

git-svn-id: http://svn.d4science-ii.research-infrastructures.eu/gcube/trunk/portlets/user/workspace-tree-widget@148959 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java

@@ -128,7 +128,7 @@ import org.gcube.portlets.user.workspace.client.view.windows.InfoDisplayMessage;
 import org.gcube.portlets.user.workspace.client.view.windows.MessageBoxAlert;
 import org.gcube.portlets.user.workspace.client.view.windows.MessageBoxConfirm;
 import org.gcube.portlets.user.workspace.client.view.windows.NewBrowserWindow;
-import org.gcube.portlets.user.workspace.client.view.windows.WindowImagePreview;
+import org.gcube.portlets.user.workspace.client.view.windows.ImagesPreviewController;
 import org.gcube.portlets.user.workspace.client.view.windows.accounting.WindowAccountingInfo;
 import org.gcube.portlets.user.workspace.client.workspace.GWTWorkspaceItem;
 import org.gcube.portlets.user.workspace.client.workspace.folder.item.GWTExternalImage;
@@ -1491,7 +1491,7 @@ public class AppControllerExplorer implements EventHandler, TreeAppControllerInt
 			public void onClickPreview(ImagePreviewEvent imagePreviewEvent) {
 
 				if(imagePreviewEvent.getClientX()  > 0 && imagePreviewEvent.getClientY() > 0)
-					doClickPreview(imagePreviewEvent, imagePreviewEvent.getClientX(), imagePreviewEvent.getClientY() );
+					doClickPreview(imagePreviewEvent, imagePreviewEvent.getClientX(), imagePreviewEvent.getClientY());
 				else
 					doClickPreview(imagePreviewEvent, 50, 50);
 
@@ -1521,9 +1521,9 @@ public class AppControllerExplorer implements EventHandler, TreeAppControllerInt
 					public void onSuccess(GWTWorkspaceItem item) {
 						GWT.log("Image loaded: "+item.getName() + " label: "+item.getLabel());
 						if(fileModel.getGXTFolderItemType().equals(GXTFolderItemTypeEnum.IMAGE_DOCUMENT))
-							new WindowImagePreview(fileModel.getName(), (GWTImageDocument) item, positionX, positionY);
+							new ImagesPreviewController(fileModel.getName(), fileModel.getParentFileModel(), (GWTImageDocument) item, positionX, positionY);
 						else
-							new WindowImagePreview(fileModel.getName(), (GWTExternalImage) item, positionX, positionY);
+							new ImagesPreviewController(fileModel.getName(), fileModel.getParentFileModel(), (GWTExternalImage) item, positionX, positionY);
 
 					}
 				});

src/main/java/org/gcube/portlets/user/workspace/client/rpc/GWTWorkspaceService.java

@@ -766,4 +766,16 @@ public interface GWTWorkspaceService extends RemoteService{
 	 * @throws Exception the exception
 	 */
 	List<FileVersionModel> getVersionHistory(String fileIdentifier) throws Exception;
+
+
+
+	/**
+	 * Gets the images for folder.
+	 *
+	 * @param folderId the folder id
+	 * @param currentImageId the current image id
+	 * @return the images for folder
+	 * @throws Exception the exception
+	 */
+	List<GWTWorkspaceItem> getImagesForFolder(String folderId, String currentImageId) throws Exception;
 }

src/main/java/org/gcube/portlets/user/workspace/client/rpc/GWTWorkspaceServiceAsync.java

@@ -753,4 +753,7 @@ public interface GWTWorkspaceServiceAsync {
 		WorkspaceVersioningOperation operation,
 		AsyncCallback<List<FileVersionModel>> callback);
 
+	void getImagesForFolder(
+		String folderId, String currentImageId, AsyncCallback<List<GWTWorkspaceItem>> asyncCallback);
+
 }

src/main/java/org/gcube/portlets/user/workspace/client/view/windows/ImagesPreviewController.java

@@ -0,0 +1,206 @@
+package org.gcube.portlets.user.workspace.client.view.windows;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.gcube.portlets.user.workspace.client.AppControllerExplorer;
+import org.gcube.portlets.user.workspace.client.model.FileModel;
+import org.gcube.portlets.user.workspace.client.resources.Resources;
+import org.gcube.portlets.user.workspace.client.workspace.GWTWorkspaceItem;
+import org.gcube.portlets.user.workspace.client.workspace.folder.item.GWTExternalImage;
+import org.gcube.portlets.user.workspace.client.workspace.folder.item.gcube.GWTImageDocument;
+import org.gcube.portlets.widgets.imagepreviewerwidget.client.EnhancedImage;
+import org.gcube.portlets.widgets.imagepreviewerwidget.client.ui.Carousel;
+
+import com.extjs.gxt.ui.client.widget.Window;
+import com.google.gwt.core.shared.GWT;
+import com.google.gwt.user.client.rpc.AsyncCallback;
+import com.google.gwt.user.client.ui.Image;
+
+
+
+/**
+ * The Class ImagesPreviewController.
+ *
+ * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
+ * May 24, 2017
+ */
+public class ImagesPreviewController {
+
+	private Window window = new Window();
+
+	private Image loader = Resources.getIconLoading().createImage();
+
+	private List<GWTWorkspaceItem> parentImages = null;
+
+	private Carousel carousel;
+
+	private FileModel folderParent;
+
+	int  currentIndex = 0;
+
+	/**
+	 * Instantiates a new window image preview.
+	 *
+	 * @param folderParent the folder parent
+	 */
+	private ImagesPreviewController(FileModel folderParent){
+		this.folderParent = folderParent;
+
+		carousel = new Carousel(){
+
+			/* (non-Javadoc)
+			 * @see org.gcube.portlets.widgets.imagepreviewerwidget.client.ui.Carousel#onClickPrev()
+			 */
+			@Override
+			public void onClickPrev() {
+
+				if(parentImages==null)
+					return;
+
+				if(currentIndex>0){
+					currentIndex--;
+				}else {
+					currentIndex = parentImages.size() - 1;
+				}
+
+				GWTWorkspaceItem wi = parentImages.get(currentIndex);
+				EnhancedImage ei = toEnhancedImage(wi);
+				if(ei!=null)
+					show(ei);
+
+			}
+
+			/* (non-Javadoc)
+			 * @see org.gcube.portlets.widgets.imagepreviewerwidget.client.ui.Carousel#onClickNext()
+			 */
+			@Override
+			public void onClickNext() {
+
+				if(parentImages==null)
+					return;
+
+				if(currentIndex<parentImages.size()-1){
+					currentIndex++;
+				}else {
+					currentIndex = 0;
+				}
+
+				GWTWorkspaceItem wi = parentImages.get(currentIndex);
+				EnhancedImage ei = toEnhancedImage(wi);
+				if(ei!=null)
+					show(ei);
+			}
+		};
+	}
+
+	/**
+	 * To enhanced image.
+	 *
+	 * @param wi the wi
+	 * @return the enhanced image
+	 */
+	private EnhancedImage toEnhancedImage(GWTWorkspaceItem wi){
+		if(wi instanceof GWTImageDocument){
+			GWTImageDocument image = (GWTImageDocument) wi;
+			return  new EnhancedImage(image.getThumbnailUrl(), image.getName(), image.getName(), image.getImageUrl());
+		}else if(wi instanceof GWTExternalImage){
+			GWTExternalImage image = (GWTExternalImage) wi;
+			return new EnhancedImage(image.getThumbnailUrl(), image.getName(), image.getName(), image.getImageUrl());
+		}
+
+		return null;
+
+	}
+
+
+	/**
+	 * Instantiates a new window image preview.
+	 *
+	 * @param name the name
+	 * @param folderParent the folder parent
+	 * @param image the image
+	 * @param positionX the position x
+	 * @param positionY the position y
+	 */
+	public ImagesPreviewController(String name, FileModel folderParent, GWTImageDocument image, int positionX, int positionY) {
+		this(folderParent);
+		showCarousel(name, image.getThumbnailUrl(), image.getImageUrl());
+		preloadImagesForFolderParent(folderParent, image.getId());
+	}
+
+	/**
+	 * Instantiates a new window image preview.
+	 *
+	 * @param name the name
+	 * @param folderParent the folder parent
+	 * @param image the image
+	 * @param positionX the position x
+	 * @param positionY the position y
+	 */
+	public ImagesPreviewController(String name, FileModel folderParent, GWTExternalImage image, int positionX, int positionY){
+		this(folderParent);
+		showCarousel(name, image.getThumbnailUrl(), image.getImageUrl());
+		preloadImagesForFolderParent(folderParent, image.getId());
+	}
+
+
+	/**
+	 * Preload images for folder parent.
+	 *
+	 * @param folderParent the folder parent
+	 * @param currentImageId the current image id
+	 */
+	private void preloadImagesForFolderParent(FileModel folderParent, String currentImageId){
+
+		AppControllerExplorer.rpcWorkspaceService.getImagesForFolder(folderParent.getIdentifier(), currentImageId, new AsyncCallback<List<GWTWorkspaceItem>>() {
+
+			@Override
+			public void onFailure(Throwable caught) {
+
+				parentImages = null;
+
+			}
+
+			@Override
+			public void onSuccess(List<GWTWorkspaceItem> result) {
+
+				GWT.log("Preloaded: "+result +" image/s");
+
+				parentImages = result;
+
+				if(parentImages.size()>0)
+					carousel.showArrows(true);
+
+			}
+		});
+	}
+
+
+	/**
+	 * Show carousel.
+	 *
+	 * @param imageTitle the image title
+	 * @param thumbnailURL the thumbnail url
+	 * @param imageURL the image url
+	 */
+	private void showCarousel(String imageTitle, String thumbnailURL, String imageURL) {
+		List<EnhancedImage> list = new ArrayList<EnhancedImage>();
+		GWT.log("Generating imageURL: "+thumbnailURL);
+		EnhancedImage myimg = new EnhancedImage(thumbnailURL, imageTitle, imageTitle);
+		list.add(myimg);
+		carousel.updateImages(list);
+		carousel.showArrows(false);
+		carousel.show();
+	}
+
+	/**
+	 * Log.
+	 *
+	 * @param msg the msg
+	 */
+	public static native void log(String msg) /*-{
+	  console.log(msg);
+	}-*/;
+
+}

src/main/java/org/gcube/portlets/user/workspace/client/view/windows/WindowImagePreview.java

@@ -1,130 +0,0 @@
-package org.gcube.portlets.user.workspace.client.view.windows;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.gcube.portlets.user.workspace.client.ConstantsExplorer;
-import org.gcube.portlets.user.workspace.client.resources.Resources;
-import org.gcube.portlets.user.workspace.client.workspace.folder.item.GWTExternalImage;
-import org.gcube.portlets.user.workspace.client.workspace.folder.item.gcube.GWTImageDocument;
-import org.gcube.portlets.widgets.imagepreviewerwidget.client.EnhancedImage;
-import org.gcube.portlets.widgets.imagepreviewerwidget.client.ui.Carousel;
-
-import com.extjs.gxt.ui.client.widget.Window;
-import com.google.gwt.core.shared.GWT;
-import com.google.gwt.event.dom.client.LoadEvent;
-import com.google.gwt.event.dom.client.LoadHandler;
-import com.google.gwt.user.client.ui.Image;
-
-
-/**
- * The Class WindowImagePreview.
- *
- * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
- * Nov 30, 2016
- */
-public class WindowImagePreview {
-
-	Window window = new Window();
-
-	Image loader = Resources.getIconLoading().createImage();
-
-	/**
-	 * Instantiates a new window image preview.
-	 *
-	 * @param name the name
-	 * @param image the image
-	 * @param positionX the position x
-	 * @param positionY the position y
-	 */
-	public WindowImagePreview(String name, GWTImageDocument image, int positionX, int positionY) {
-		initWindow(name, positionX, positionY);
-		window.add(loader);
-		Image img = new Image(image.getThumbnailUrl());
-
-		img.setWidth(String.valueOf(image.getThumbnailWidth()));
-		img.setHeight(String.valueOf(image.getThumbnailHeight()));
-		GWT.log("Thumbnail URL 1: "+image.getThumbnailUrl());
-		Image loadImg = new Image(image.getThumbnailUrl());
-
-		loadImg.addLoadHandler(new LoadHandler() {
-
-			@Override
-			public void onLoad(LoadEvent event) {
-				GWT.log("Image Load event fired");
-				window.remove(loader);
-			}
-		});
-		window.add(loadImg);
-		window.show();
-	}
-
-	/**
-	 * Instantiates a new window image preview.
-	 *
-	 * @param name the name
-	 * @param image the image
-	 * @param positionX the position x
-	 * @param positionY the position y
-	 */
-	public WindowImagePreview(String name, GWTExternalImage image, int positionX, int positionY){
-
-		initWindow(name, positionX, positionY);
-
-//		System.out.println("URL.................." + image.getThumbnailUrl());
-//		System.out.println("W.................." + String.valueOf(image.getThumbnailWidth()));
-//		System.out.println("H.................." + String.valueOf(image.getThumbnailHeight()));
-//		System.out.println("postionX.................." + positionX);
-//		System.out.println("positionY.................." + positionY);
-
-//		Image img = new Image(image.getThumbnailUrl());
-//		GWT.log("Thumbnail URL 2: "+image.getThumbnailUrl());
-////		img.setWidth(String.valueOf(image.getThumbnailWidth()));
-////		img.setHeight(String.valueOf(image.getThumbnailHeight()));
-//		window.add(img);
-//		window.show();
-
-		showCarousel(name, image.getThumbnailUrl(), positionX, positionY);
-
-	}
-
-	/**
-	 * Inits the window.
-	 *
-	 * @param name the name
-	 * @param positionX the position x
-	 * @param positionY the position y
-	 */
-	private void initWindow(String name, int positionX, int positionY) {
-
-		window.setHeaderVisible(true);
-		window.setHeading(ConstantsExplorer.PREVIEWOF + " " + name);
-		window.setMaximizable(false);
-		window.setResizable(false);
-		window.setAutoWidth(true);
-		window.setAutoHeight(true);
-		window.setPosition(positionX, positionY);
-	}
-
-	private void showCarousel(
-		String imageTitle, String imageURL, int positionX, int positionY) {
-		Carousel carousel = new Carousel();
-		List<EnhancedImage> list = new ArrayList<EnhancedImage>();
-		GWT.log("Generating imageURL: "+imageURL);
-		EnhancedImage myimg = new EnhancedImage(imageURL, imageTitle, imageTitle);
-		list.add(myimg);
-		carousel.updateImages(list);
-		carousel.hideArrows();
-		carousel.show();
-	}
-
-	/**
-	 * Log.
-	 *
-	 * @param msg the msg
-	 */
-	public static native void log(String msg) /*-{
-	  console.log(msg);
-	}-*/;
-
-}

src/main/java/org/gcube/portlets/user/workspace/client/workspace/GWTWorkspaceItem.java

@@ -10,8 +10,9 @@ import com.google.gwt.user.client.rpc.IsSerializable;
 
 
 /**
- * @author Federico De Faveri defaveri@isti.cnr.it
+ * The Class GWTWorkspaceItem.
  *
+ * @author Federico De Faveri defaveri@isti.cnr.it
  */
 public abstract class GWTWorkspaceItem implements IsSerializable {
 
@@ -27,9 +28,25 @@ public abstract class GWTWorkspaceItem implements IsSerializable {
 
 	protected boolean isLoading = false;
 
+	/**
+	 * Instantiates a new GWT workspace item.
+	 */
 	protected GWTWorkspaceItem()
 	{}
 
+	/**
+	 * Instantiates a new GWT workspace item.
+	 *
+	 * @param parent the parent
+	 * @param id the id
+	 * @param name the name
+	 * @param description the description
+	 * @param owner the owner
+	 * @param creationTime the creation time
+	 * @param properties the properties
+	 * @param lastModificationTime the last modification time
+	 * @param lastAction the last action
+	 */
 	public GWTWorkspaceItem(GWTWorkspaceFolder parent, String id, String name,
 			String description, String owner, Date creationTime,
 			GWTProperties properties, Date lastModificationTime, GWTWorkspaceItemAction lastAction) {
@@ -45,63 +62,154 @@ public abstract class GWTWorkspaceItem implements IsSerializable {
 		this.lastAction = lastAction;
 	}
 
+
+	/**
+	 * Sets the id.
+	 *
+	 * @param id the id to set
+	 */
+	public void setId(String id) {
+
+		this.id = id;
+	}
+
+	/**
+	 * Gets the id.
+	 *
+	 * @return the id
+	 */
 	public String getId(){
 		return id;
 	}
 
+	/**
+	 * Gets the parent.
+	 *
+	 * @return the parent
+	 */
 	public GWTWorkspaceFolder getParent()
 	{
 		return parent;
 	}
 
+	/**
+	 * Gets the creation time.
+	 *
+	 * @return the creation time
+	 */
 	public Date getCreationTime(){
 		return creationTime;
 	}
 
+	/**
+	 * Gets the properties.
+	 *
+	 * @return the properties
+	 */
 	public GWTProperties getProperties(){
 		return properties;
 	}
 
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	public String getName(){
 		return name;
 	}
 
+	/**
+	 * Gets the owner.
+	 *
+	 * @return the owner
+	 */
 	public String getOwner(){
 		return owner;
 	}
 
+	/**
+	 * Gets the description.
+	 *
+	 * @return the description
+	 */
 	public String getDescription() {
 		return description;
 	}
 
+	/**
+	 * Gets the last modification time.
+	 *
+	 * @return the last modification time
+	 */
 	public Date getLastModificationTime() {
 		return lastModificationTime;
 	}
 
+	/**
+	 * Gets the last action.
+	 *
+	 * @return the last action
+	 */
 	public GWTWorkspaceItemAction getLastAction() {
 		return lastAction;
 	}
 
+	/**
+	 * Gets the item description.
+	 *
+	 * @return the item description
+	 */
 	public abstract GWTItemDescription getItemDescription();
 
+	/**
+	 * Gets the label.
+	 *
+	 * @return the label
+	 */
 	public String getLabel()
 	{
 		return getItemDescription().getLabel();
 	}
 
+	/**
+	 * Gets the icon class.
+	 *
+	 * @return the icon class
+	 */
 	public String getIconClass(){
 		return getItemDescription().getIconClass();
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	public abstract GWTWorkspaceItemType getType();
 
+	/**
+	 * Gets the children.
+	 *
+	 * @return the children
+	 */
 	public abstract List<? extends GWTWorkspaceItem> getChildren();
 
+	/**
+	 * Sets the parent.
+	 *
+	 * @param parent the new parent
+	 */
 	protected void setParent(GWTWorkspaceFolder parent)
 	{
 		this.parent = parent;
 	}
 
+	/**
+	 * Count sub tree children.
+	 *
+	 * @return the int
+	 */
 	public int countSubTreeChildren()
 	{
 		int total = 0;
@@ -113,6 +221,13 @@ public abstract class GWTWorkspaceItem implements IsSerializable {
 		return total;
 
 	}
+
+	/**
+	 * Count sub tree children.
+	 *
+	 * @param type the type
+	 * @return the int
+	 */
 	public int countSubTreeChildren(GWTWorkspaceItemType type)
 	{
 		int total = 0;
@@ -126,37 +241,69 @@ public abstract class GWTWorkspaceItem implements IsSerializable {
 		return total;
 	}
 
+	/**
+	 * Sets the name.
+	 *
+	 * @param name the new name
+	 */
 	protected void setName(String name)
 	{
 		this.name = name;
 	}
 
+	/**
+	 * Sets the description.
+	 *
+	 * @param description the new description
+	 */
 	protected void setDescription(String description) {
 		this.description = description;
 	}
 
+	/**
+	 * Checks if is root.
+	 *
+	 * @return true, if is root
+	 */
 	public boolean isRoot()
 	{
 		return getParent() == null;
 	}
 
+	/* (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
 	@Override
 	public String toString() {
 		return "Item: "+this.name;
 	}
 
+	/* (non-Javadoc)
+	 * @see java.lang.Object#equals(java.lang.Object)
+	 */
 	@Override
 	public boolean equals(Object obj) {
 		if (!(obj instanceof GWTWorkspaceItem)) return false;
 		return this.id.equals(((GWTWorkspaceItem)obj).getId());
 	}
 
+	/**
+	 * Gets the path.
+	 *
+	 * @return the path
+	 */
 	public String getPath()
 	{
 		if (isRoot()) return "/"+name;
 		return getParent().getPath()+"/"+name;
 	}
 
+	/**
+	 * Checks if is ancestor.
+	 *
+	 * @param item the item
+	 * @return true, if is ancestor
+	 */
 	public boolean isAncestor(GWTWorkspaceItem item)
 	{
 		if (id.equals(item.getId())) return true;
@@ -167,6 +314,8 @@ public abstract class GWTWorkspaceItem implements IsSerializable {
 	}
 
 	/**
+	 * Checks if is loading.
+	 *
 	 * @return the isLoading
 	 */
 	public boolean isLoading() {

src/main/java/org/gcube/portlets/user/workspace/client/workspace/folder/item/GWTExternalImage.java

@@ -16,8 +16,9 @@ import com.google.gwt.user.client.rpc.IsSerializable;
 
 
 /**
- * @author Federico De Faveri defaveri@isti.cnr.it
+ * The Class GWTExternalImage.
  *
+ * @author Federico De Faveri defaveri@isti.cnr.it
  */
 public class GWTExternalImage extends GWTFolderItem implements IsSerializable, GWTImage{
 
@@ -32,9 +33,34 @@ public class GWTExternalImage extends GWTFolderItem implements IsSerializable, G
 	protected int height;
 	protected String mimeType;
 
+	/**
+	 * Instantiates a new GWT external image.
+	 */
 	protected GWTExternalImage()
 	{}
 
+	/**
+	 * Instantiates a new GWT external image.
+	 *
+	 * @param creationTime the creation time
+	 * @param id the id
+	 * @param properties the properties
+	 * @param name the name
+	 * @param owner the owner
+	 * @param description the description
+	 * @param lastModificationTime the last modification time
+	 * @param lastAction the last action
+	 * @param parent the parent
+	 * @param imageUrl the image url
+	 * @param thumbnailUrl the thumbnail url
+	 * @param width the width
+	 * @param height the height
+	 * @param length the length
+	 * @param thumbnailWidth the thumbnail width
+	 * @param thumbnailHeight the thumbnail height
+	 * @param thumbnailLenght the thumbnail lenght
+	 * @param mimeType the mime type
+	 */
 	public GWTExternalImage(Date creationTime, String id, GWTProperties properties, String name, String owner,
 			String description, Date lastModificationTime, GWTWorkspaceItemAction lastAction,
 			GWTWorkspaceFolder parent, String imageUrl, String thumbnailUrl, int width, int height, long length, int thumbnailWidth, int thumbnailHeight, long thumbnailLenght, String mimeType) {
@@ -50,10 +76,27 @@ public class GWTExternalImage extends GWTFolderItem implements IsSerializable, G
 		this.thumbnailLenght = thumbnailLenght;
 	}
 
-	//ADDED BY FRANCESCO
-	public GWTExternalImage(String imageUrl, String thumbnailUrl, int width, int height, long length, int thumbnailWidth, int thumbnailHeight, long thumbnailLenght, String mimeType) {
-//		super(id, name, description, owner, creationTime, null, null, null, parent, length);
 
+
+	/**
+	 * ADDED by Francesco
+	 * Instantiates a new GWT external image.
+	 *
+	 * @param id the id
+	 * @param name the name
+	 * @param imageUrl the image url
+	 * @param thumbnailUrl the thumbnail url
+	 * @param width the width
+	 * @param height the height
+	 * @param length the length
+	 * @param thumbnailWidth the thumbnail width
+	 * @param thumbnailHeight the thumbnail height
+	 * @param thumbnailLenght the thumbnail lenght
+	 * @param mimeType the mime type
+	 */
+	public GWTExternalImage(String id, String name, String imageUrl, String thumbnailUrl, int width, int height, long length, int thumbnailWidth, int thumbnailHeight, long thumbnailLenght, String mimeType) {
+		this.id = id;
+		this.name = name;
 		this.imageUrl = imageUrl;
 		this.thumbnailUrl = thumbnailUrl;
 		this.width = width;
@@ -64,6 +107,9 @@ public class GWTExternalImage extends GWTFolderItem implements IsSerializable, G
 		this.thumbnailLenght = thumbnailLenght;
 	}
 
+	/* (non-Javadoc)
+	 * @see org.gcube.portlets.user.workspace.client.workspace.folder.GWTFolderItem#getFolderItemType()
+	 */
 	@Override
 	public GWTFolderItemType getFolderItemType() {
 		return GWTFolderItemType.EXTERNAL_IMAGE;

src/main/java/org/gcube/portlets/user/workspace/server/GWTWorkspaceBuilder.java

@@ -363,7 +363,7 @@ public class GWTWorkspaceBuilder {
 						image.getMimeType());
 			}else{
 
-				gwtImage = new GWTExternalImage(
+				gwtImage = new GWTExternalImage(image.getId(), image.getName(),
 						buildImageUrl(image.getId(), currentGroupId, currentUserId),
 						buildThumbnailUrl(image.getId(), currentGroupId, currentUserId),
 						image.getWidth(),

src/main/java/org/gcube/portlets/user/workspace/server/GWTWorkspaceServiceImpl.java

@@ -4107,4 +4107,69 @@ public class GWTWorkspaceServiceImpl extends RemoteServiceServlet implements GWT
 			throw new Exception(error);
 		}
 	}
+
+
+
+	/* (non-Javadoc)
+	 * @see org.gcube.portlets.user.workspace.client.rpc.GWTWorkspaceService#getImagesForFolder(java.lang.String, java.lang.String)
+	 */
+	@Override
+	public List<GWTWorkspaceItem> getImagesForFolder(String folderId, String currentImageId) throws Exception {
+
+		if(folderId==null)
+			return null;
+
+		try {
+
+			Workspace workspace = getWorkspace();
+			workspaceLogger.debug("get images for folder id: "+folderId);
+			WorkspaceItem item = workspace.getItem(folderId); //get item from workspace
+			List<GWTWorkspaceItem> images = new ArrayList<GWTWorkspaceItem>();
+
+			if (item.isFolder()){
+				WorkspaceFolder folder = (WorkspaceFolder) item;
+				GWTWorkspaceBuilder builder = getGWTWorkspaceBuilder();
+				PortalContextInfo context = WsUtil.getPortalContext(this.getThreadLocalRequest());
+				GCubeUser user = PortalContext.getConfiguration().getCurrentUser(this.getThreadLocalRequest());
+				List<WorkspaceItem> children = folder.getChildren();
+
+				for (WorkspaceItem workspaceItem : children) {
+					boolean foundCurrentImage = false;
+					if(workspaceItem.getType().compareTo(WorkspaceItemType.FOLDER_ITEM)==0){
+						FolderItem file = (FolderItem) workspaceItem;
+						GWTWorkspaceItem image = null;
+						switch (file.getFolderItemType()) {
+						case EXTERNAL_IMAGE:
+							image = builder.buildGWTWorkspaceImage(workspaceItem, false, false, context.getCurrGroupId()+"", user.getUserId()+"");
+							image.setId(workspaceItem.getId());
+							break;
+						case IMAGE_DOCUMENT:
+							image = builder.buildGWTWorkspaceImage(workspaceItem, true, false, context.getCurrGroupId()+"", user.getUserId()+"");
+							image.setId(workspaceItem.getId());
+							break;
+						default:
+							break;
+						}
+
+						if(image!=null){
+							if(!foundCurrentImage && image.getId().compareTo(currentImageId)==0){
+								workspaceLogger.debug("It is current thumbnail adding to list as first element: "+image.getName());
+								images.add(0, image);
+								foundCurrentImage = true;
+							}else{
+								workspaceLogger.debug("Adding thumbnail name to list: "+image.getName());
+								images.add(image);
+							}
+						}
+					}
+				}
+			}
+
+			workspaceLogger.info("Returning "+images.size() +" images for folder id: "+folderId);
+			return images;
+		} catch (Exception e) {
+			workspaceLogger.error("Error in server get images by folder id: "+folderId, e);
+			throw new Exception(e.getMessage());
+		}
+	}
 }