Synnefo » Pithos Web Client

/*

 * Copyright 2011 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client;

import com.google.gwt.event.dom.client.ContextMenuEvent;

import com.google.gwt.event.dom.client.ContextMenuHandler;

import static com.google.gwt.query.client.GQuery.$;

import gr.grnet.pithos.web.client.commands.UploadFileCommand;

import gr.grnet.pithos.web.client.foldertree.File;

import gr.grnet.pithos.web.client.foldertree.Folder;

import gr.grnet.pithos.web.client.foldertree.FolderTreeView;

import gr.grnet.pithos.web.client.rest.resource.FileResource;

import gwtquery.plugins.draggable.client.DraggableOptions;

import gwtquery.plugins.draggable.client.StopDragException;

import gwtquery.plugins.draggable.client.DraggableOptions.DragFunction;

import gwtquery.plugins.draggable.client.DraggableOptions.RevertOption;

import gwtquery.plugins.draggable.client.events.DragContext;

import gwtquery.plugins.draggable.client.events.DragStartEvent;

import gwtquery.plugins.draggable.client.events.DragStopEvent;

import gwtquery.plugins.draggable.client.events.DragStartEvent.DragStartEventHandler;

import gwtquery.plugins.draggable.client.events.DragStopEvent.DragStopEventHandler;

import gwtquery.plugins.droppable.client.gwt.DragAndDropCellTable;

import gwtquery.plugins.droppable.client.gwt.DragAndDropColumn;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.Iterator;

import java.util.List;

import com.google.gwt.cell.client.ImageResourceCell;

import com.google.gwt.cell.client.SafeHtmlCell;

import com.google.gwt.cell.client.TextCell;

import com.google.gwt.cell.client.ValueUpdater;

import com.google.gwt.core.client.GWT;

import com.google.gwt.dom.client.Style.Cursor;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.i18n.client.DateTimeFormat;

import com.google.gwt.resources.client.ClientBundle;

import com.google.gwt.resources.client.ImageResource;

import com.google.gwt.safehtml.client.SafeHtmlTemplates;

import com.google.gwt.safehtml.shared.SafeHtml;

import com.google.gwt.safehtml.shared.SafeHtmlBuilder;

import com.google.gwt.user.cellview.client.CellTable;

import com.google.gwt.user.cellview.client.GssSimplePager;

import com.google.gwt.user.client.DOM;

import com.google.gwt.user.client.Event;

import com.google.gwt.user.client.Window;

import com.google.gwt.user.client.ui.AbstractImagePrototype;

import com.google.gwt.user.client.ui.Button;

import com.google.gwt.user.client.ui.Composite;

import com.google.gwt.user.client.ui.HorizontalPanel;

import com.google.gwt.user.client.ui.VerticalPanel;

import com.google.gwt.view.client.ListDataProvider;

import com.google.gwt.view.client.MultiSelectionModel;

import com.google.gwt.view.client.ProvidesKey;

import com.google.gwt.view.client.SelectionChangeEvent;

import com.google.gwt.view.client.SelectionChangeEvent.Handler;

/**

 * A composite that displays the list of files in a particular folder.

 */

public class FileList extends Composite {

        ListDataProvider<File> provider = new ListDataProvider<File>();

    /**

       * The styles applied to the table.

       */

    interface TableStyle extends CellTable.Style {

    }

        interface TableResources extends DragAndDropCellTable.Resources {

            @Source({CellTable.Style.DEFAULT_CSS, "GssCellTable.css"})

            TableStyle cellTableStyle();

        }

        static interface Templates extends SafeHtmlTemplates {

            Templates INSTANCE = GWT.create(Templates.class);

            @Template("<div id='dragHelper' style='border:1px solid black; background-color:#ffffff; color:black; width:150px;z-index:100'></div>")

            SafeHtml outerHelper();

        @Template("<span id='{0}'>{0}</span>")

        public SafeHtml filenameSpan(String filename);

        @Template("<a href='{0}' title='{1}' rel='lytebox[mnf]' onclick='myLytebox.start(this, false, false); return false;'>(view)</a>")

        public SafeHtml viewLink(String link, String title);

        @Template("<table><tr><td rowspan='3'>{0}</td><td style='font-size:95%;' id='{1}'>{1}</td></tr><tr><td>{2}</td></tr></table>")

        public SafeHtml rendelContactCell(String imageHtml, String name, String fileSize);

        @Template("<span id='{0}' class='{1}'>{2}</span>")

        public SafeHtml spanWithIdAndClass(String id, String cssClass, String content);

        }

    private String showingStats = "";

        private int startIndex = 0;

        /**

         * A constant that denotes the completion of an IncrementalCommand.

         */

        public static final boolean DONE = false;

        private final DateTimeFormat formatter = DateTimeFormat.getFormat("d/M/yyyy h:mm a");

        /**

         * Specifies that the images available for this composite will be the ones

         * available in FileContextMenu.

         */

        public interface Images extends ClientBundle,FileContextMenu.Images, CellTreeView.Images {

                @Source("gr/grnet/pithos/resources/blank.gif")

                ImageResource blank();

                @Source("gr/grnet/pithos/resources/asc.png")

                ImageResource asc();

                @Source("gr/grnet/pithos/resources/desc.png")

                ImageResource desc();

                @Source("gr/grnet/pithos/resources/mimetypes/document_shared.png")

                ImageResource documentShared();

                @Source("gr/grnet/pithos/resources/mimetypes/kcmfontinst.png")

                ImageResource wordprocessor();

                @Source("gr/grnet/pithos/resources/mimetypes/log.png")

                ImageResource spreadsheet();

                @Source("gr/grnet/pithos/resources/mimetypes/kpresenter_kpr.png")

                ImageResource presentation();

                @Source("gr/grnet/pithos/resources/mimetypes/acroread.png")

                ImageResource pdf();

                @Source("gr/grnet/pithos/resources/mimetypes/image.png")

                ImageResource image();

                @Source("gr/grnet/pithos/resources/mimetypes/video2.png")

                ImageResource video();

                @Source("gr/grnet/pithos/resources/mimetypes/knotify.png")

                ImageResource audio();

                @Source("gr/grnet/pithos/resources/mimetypes/html.png")

                ImageResource html();

                @Source("gr/grnet/pithos/resources/mimetypes/txt.png")

                ImageResource txt();

                @Source("gr/grnet/pithos/resources/mimetypes/ark2.png")

                ImageResource zip();

                @Source("gr/grnet/pithos/resources/mimetypes/kcmfontinst_shared.png")

                ImageResource wordprocessorShared();

                @Source("gr/grnet/pithos/resources/mimetypes/log_shared.png")

                ImageResource spreadsheetShared();

                @Source("gr/grnet/pithos/resources/mimetypes/kpresenter_kpr_shared.png")

                ImageResource presentationShared();

                @Source("gr/grnet/pithos/resources/mimetypes/acroread_shared.png")

                ImageResource pdfShared();

                @Source("gr/grnet/pithos/resources/mimetypes/image_shared.png")

                ImageResource imageShared();

                @Source("gr/grnet/pithos/resources/mimetypes/video2_shared.png")

                ImageResource videoShared();

                @Source("gr/grnet/pithos/resources/mimetypes/knotify_shared.png")

                ImageResource audioShared();

                @Source("gr/grnet/pithos/resources/mimetypes/html_shared.png")

                ImageResource htmlShared();

                @Source("gr/grnet/pithos/resources/mimetypes/txt_shared.png")

                ImageResource txtShared();

                @Source("gr/grnet/pithos/resources/mimetypes/ark2_shared.png")

                ImageResource zipShared();

        }

        /**

         * The number of files in this folder.

         */

        int folderFileCount;

        /**

         * Total folder size

         */

        long folderTotalSize;

        /**

         * A cache of the files in the list.

         */

        private List<File> files;

        /**

         * The widget's image bundle.

         */

        private final Images images;

        private FileContextMenu contextMenu;

        private DragAndDropCellTable<File> celltable;

        private final MultiSelectionModel<File> selectionModel;

        private final List<SortableHeader> allHeaders = new ArrayList<SortableHeader>();

        SortableHeader nameHeader;

        GssSimplePager pagerBottom;

        GssSimplePager pagerTop;

        Button uploadButtonBottom;

        Button uploadButtonTop;

    FolderTreeView treeView;

    /**

         * Construct the file list widget. This entails setting up the widget

         * layout, fetching the number of files in the current folder from the

         * server and filling the local file cache of displayed files with data from

         * the server, as well.

         *

         * @param _images

         */

        public FileList(Images _images, FolderTreeView _treeView) {

                images = _images;

        this.treeView = _treeView;

        DragAndDropCellTable.Resources resources = GWT.create(TableResources.class);

        ProvidesKey<File> keyProvider = new ProvidesKey<File>(){

                        @Override

                        public Object getKey(File item) {

                                return item.getUri();

                        }

                };

                celltable = new DragAndDropCellTable<File>(GSS.VISIBLE_FILE_COUNT, resources, keyProvider);

        celltable.setWidth("100%");

        celltable.setStyleName("pithos-List");

                DragAndDropColumn<File, ImageResource> status = new DragAndDropColumn<File, ImageResource>(new ImageResourceCell() {

                    @Override

                public boolean handlesSelection() {

                    return false;

                }

                })

        {

                 @Override

                 public ImageResource getValue(File entity) {

                     return getFileIcon(entity);

                 }

            };

            celltable.addColumn(status,"");

            initDragOperation(status);

        final DragAndDropColumn<File,SafeHtml> nameColumn = new DragAndDropColumn<File,SafeHtml>(new SafeHtmlCell()) {

                        @Override

                        public SafeHtml getValue(File object) {

                                SafeHtmlBuilder sb = new SafeHtmlBuilder();

                sb.append(Templates.INSTANCE.filenameSpan(object.getName()));

                                if (object.getContentType().endsWith("png") || object.getContentType().endsWith("gif") || object.getContentType().endsWith("jpeg")) {

                                sb.appendHtmlConstant(" ")

                      .append(Templates.INSTANCE.viewLink(object.getUri(), object.getOwner() + " : " + object.getPath() + object.getName()));

                                }

                                return sb.toSafeHtml();

                        }

                };

        initDragOperation(nameColumn);

        celltable.addColumn(nameColumn, nameHeader = new SortableHeader("Name"));

                allHeaders.add(nameHeader);

                nameHeader.setUpdater(new FileValueUpdater(nameHeader, "name"));

                celltable.redrawHeaders();

            DragAndDropColumn<File,String> aColumn = new DragAndDropColumn<File, String>(new TextCell()) {

                        @Override

                        public String getValue(File object) {

                                return object.getOwner();

                        }

                };

        SortableHeader aheader = new SortableHeader("Owner");

                celltable.addColumn(aColumn, aheader);

                initDragOperation(aColumn);

                allHeaders.add(aheader);

        aheader.setUpdater(new FileValueUpdater(aheader, "owner"));

        aColumn = new DragAndDropColumn<File,String>(new TextCell()) {

                        @Override

                        public String getValue(File object) {

                                return object.getPath();

                        }

                };

        aheader = new SortableHeader("Path");

                celltable.addColumn(aColumn, aheader);

                initDragOperation(aColumn);

                allHeaders.add(aheader);

                aheader.setUpdater(new FileValueUpdater(aheader, "path"));

        aColumn = new DragAndDropColumn<File,String>(new TextCell()) {

                        @Override

                        public String getValue(File object) {

                            return String.valueOf(object.getVersion());

                        }

                };

        aheader = new SortableHeader("Version");

                celltable.addColumn(aColumn, aheader);

                initDragOperation(aColumn);

                allHeaders.add(aheader);

                aheader.setUpdater(new FileValueUpdater(aheader, "version"));

        aColumn = new DragAndDropColumn<File,String>(new TextCell()) {

                        @Override

                        public String getValue(File object) {

                                // TODO Auto-generated method stub

                                return object.getSizeAsString();

                        }

                };

        aheader = new SortableHeader("Size");

        celltable.addColumn(aColumn, aheader);

                initDragOperation(aColumn);

                allHeaders.add(aheader);

                aheader.setUpdater(new FileValueUpdater(aheader, "size"));

        aColumn = new DragAndDropColumn<File,String>(new TextCell()) {

                        @Override

                        public String getValue(File object) {

                                return formatter.format(object.getLastModified());

                        }

                };

        aheader = new SortableHeader("Last Modified");

                celltable.addColumn(aColumn, aheader);

                allHeaders.add(aheader);

                aheader.setUpdater(new FileValueUpdater(aheader, "date"));

                provider.addDataDisplay(celltable);

                celltable.addDragStopHandler(new DragStopEventHandler() {

                    @Override

                    public void onDragStop(DragStopEvent event) {

                            GWT.log("DRAG STOPPED");

                    }

            });

                celltable.addDragStartHandler(new DragStartEventHandler() {

                    public void onDragStart(DragStartEvent event) {

                        FileResource value = event.getDraggableData();

                        com.google.gwt.dom.client.Element helper = event.getHelper();

                        SafeHtmlBuilder sb = new SafeHtmlBuilder();

                        sb.appendHtmlConstant("<b>");

                        DisplayHelper.log(value.getName());

                        if(getSelectedFiles().size()==1)

                                sb.appendEscaped(value.getName());

                        else

                                sb.appendEscaped(getSelectedFiles().size()+" files");

                        sb.appendHtmlConstant("</b>");

                        helper.setInnerHTML(sb.toSafeHtml().asString());

                    }

                });

                VerticalPanel vp = new VerticalPanel();

                vp.setWidth("100%");

                pagerTop = new GssSimplePager(GssSimplePager.TextLocation.CENTER);

        pagerTop.setVisible(false);

                pagerTop.setDisplay(celltable);

                uploadButtonTop = new Button("<span id='topMenu.file.upload'>" + AbstractImagePrototype.create(images.fileUpdate()).getHTML() + "&nbsp;Upload</span>");

                uploadButtonTop.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                new UploadFileCommand(null).execute();

                        }

                });

                HorizontalPanel topPanel = new HorizontalPanel();

                topPanel.add(pagerTop);

                topPanel.add(uploadButtonTop);

                vp.add(topPanel);

        vp.add(celltable);

                pagerBottom = new GssSimplePager(GssSimplePager.TextLocation.CENTER);

        pagerBottom.setVisible(false);

                pagerBottom.setDisplay(celltable);

                uploadButtonBottom=new Button("<span id='topMenu.file.upload'>" + AbstractImagePrototype.create(images.fileUpdate()).getHTML() + "&nbsp;Upload</span>");

                uploadButtonBottom.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                new UploadFileCommand(null).execute();

                        }

                });

        HorizontalPanel bottomPanel = new HorizontalPanel();

        bottomPanel.add(pagerBottom);

                bottomPanel.add(uploadButtonBottom);

                vp.add(bottomPanel);

                vp.setCellWidth(celltable, "100%");

        vp.addHandler(new ContextMenuHandler() {

            @Override

            public void onContextMenu(ContextMenuEvent event) {

                contextMenu = new FileContextMenu(images, treeView.getSelection(), false);

                int x = event.getNativeEvent().getClientX();

                int y = event.getNativeEvent().getClientY();

                contextMenu.setPopupPosition(x, y);

                contextMenu.show();

            }

        }, ContextMenuEvent.getType());

                initWidget(vp);

                selectionModel = new MultiSelectionModel<File>(keyProvider);

                 Handler selectionHandler = new SelectionChangeEvent.Handler() {

             @Override 

             public void onSelectionChange(SelectionChangeEvent event) {

                     if(getSelectedFiles().size() == 1)

                             GSS.get().setCurrentSelection(getSelectedFiles().get(0));

                     else

                             GSS.get().setCurrentSelection(getSelectedFiles());

             }

         };

         selectionModel.addSelectionChangeHandler(selectionHandler);

                celltable.setSelectionModel(selectionModel, GSSSelectionEventManager.<File> createDefaultManager());

                celltable.setPageSize(GSS.VISIBLE_FILE_COUNT);

                sinkEvents(Event.ONCONTEXTMENU);

                sinkEvents(Event.ONMOUSEUP);

                sinkEvents(Event.ONMOUSEDOWN);

                sinkEvents(Event.ONCLICK);

                sinkEvents(Event.ONKEYDOWN);

                sinkEvents(Event.ONDBLCLICK);

                GSS.preventIESelection();

        }

        public List<File> getSelectedFiles() {

        return new ArrayList<File>(selectionModel.getSelectedSet());

        }

        private void initDragOperation(DragAndDropColumn<?, ?> column) {

        // retrieve draggableOptions on the column

                DraggableOptions draggableOptions = column.getDraggableOptions();

                // use template to construct the helper. The content of the div will be set

                // after

                draggableOptions.setHelper($(Templates.INSTANCE.outerHelper().asString()));

                //draggableOptions.setZIndex(100);

                // opacity of the helper

                draggableOptions.setAppendTo("body");

                //draggableOptions.setOpacity((float) 0.8);

                draggableOptions.setContainment("document");

                // cursor to use during the drag operation

                draggableOptions.setCursor(Cursor.MOVE);

                // set the revert option

                draggableOptions.setRevert(RevertOption.ON_INVALID_DROP);

                // prevents dragging when user click on the category drop-down list

                draggableOptions.setCancel("select");

            draggableOptions.setOnBeforeDragStart(new DragFunction() {

                        @Override

                        public void f(DragContext context) {

                        File value = context.getDraggableData();

                                if (!selectionModel.isSelected(value)) {

                                   throw new StopDragException();

                        }

                        }

                });

    }

//        @Override

//        public void onBrowserEvent(Event event) {

//

//                if (files == null || files.size() == 0) {

//                        if (DOM.eventGetType(event) == Event.ONCONTEXTMENU && getSelectedFiles().size() == 0) {

//                                contextMenu = new FileContextMenu(images, false, true);

//                contextMenu.show();

//                                event.preventDefault();

//                                event.cancelBubble(true);

//                        }

//                        return;

//                }

//                if (DOM.eventGetType(event) == Event.ONCONTEXTMENU && getSelectedFiles().size() != 0) {

//                        GWT.log("*****GOING TO SHOW CONTEXT MENU ****", null);

//                        contextMenu =  new FileContextMenu(images, false, false);

//                        contextMenu = contextMenu.onEvent(event);

//                        event.cancelBubble(true);

//                        event.preventDefault();

//                } else if (DOM.eventGetType(event) == Event.ONCONTEXTMENU && getSelectedFiles().size() == 0) {

//                        contextMenu = new FileContextMenu(images, false, true);

//                        contextMenu = contextMenu.onEmptyEvent(event);

//                        event.cancelBubble(true);

//                        event.preventDefault();

//                } else if (DOM.eventGetType(event) == Event.ONDBLCLICK)

//                        if (getSelectedFiles().size() == 1) {

//                                GSS app = GSS.get();

//                                File file = getSelectedFiles().get(0);

//                                Window.open(file.getUri(), "_blank", "");

//                                event.preventDefault();

//                                return;

//                        }

//                super.onBrowserEvent(event);

//        }

        /**

         * Update the display of the file list.

         */

        void update(boolean sort) {

                int count = folderFileCount;

                int max = startIndex + GSS.VISIBLE_FILE_COUNT;

                if (max > count)

                        max = count;

                folderTotalSize = 0;

                for(File f : files){

                        folderTotalSize += f.getBytes();

                }

                if (folderFileCount == 0) {

                        showingStats = "no files";

                } else if (folderFileCount < GSS.VISIBLE_FILE_COUNT) {

                        if (folderFileCount == 1)

                                showingStats = "1 file";

                        else

                                showingStats = folderFileCount + " files";

                        showingStats += " (" + FileResource.getFileSizeAsString(folderTotalSize) + ")";

                } else {

                        showingStats = "" + (startIndex + 1) + " - " + max + " of " + count + " files" + " (" + FileResource.getFileSizeAsString(folderTotalSize) + ")";

                }

                showCellTable();

                updateCurrentlyShowingStats();

        }

        /**

         * Return the proper icon based on the MIME type of the file.

         *

         * @param file

         * @return the icon

         */

        private ImageResource getFileIcon(File file) {

                String mimetype = file.getContentType();

                boolean shared = file.isShared();

                if (mimetype == null)

                        return shared ? images.documentShared() : images.document();

                mimetype = mimetype.toLowerCase();

                if (mimetype.startsWith("application/pdf"))

                        return shared ? images.pdfShared() : images.pdf();

                else if (mimetype.endsWith("excel"))

                        return shared ? images.spreadsheetShared() : images.spreadsheet();

                else if (mimetype.endsWith("msword"))

                        return shared ? images.wordprocessorShared() : images.wordprocessor();

                else if (mimetype.endsWith("powerpoint"))

                        return shared ? images.presentationShared() : images.presentation();

                else if (mimetype.startsWith("application/zip") ||

                                        mimetype.startsWith("application/gzip") ||

                                        mimetype.startsWith("application/x-gzip") ||

                                        mimetype.startsWith("application/x-tar") ||

                                        mimetype.startsWith("application/x-gtar"))

                        return shared ? images.zipShared() : images.zip();

                else if (mimetype.startsWith("text/html"))

                        return shared ? images.htmlShared() : images.html();

                else if (mimetype.startsWith("text/plain"))

                        return shared ? images.txtShared() : images.txt();

                else if (mimetype.startsWith("image/"))

                        return shared ? images.imageShared() : images.image();

                else if (mimetype.startsWith("video/"))

                        return shared ? images.videoShared() : images.video();

                else if (mimetype.startsWith("audio/"))

                        return shared ? images.audioShared() : images.audio();

                return shared ? images.documentShared() : images.document();

        }

        /**

         * Update status panel with currently showing file stats.

         */

        public void updateCurrentlyShowingStats() {

                GSS.get().getStatusPanel().updateCurrentlyShowing(showingStats);

        }

        /**

         * Fill the file cache with data.

         */

        public void setFiles(final List<File> _files) {

                files = new ArrayList<File>();

            for (File fres : _files)

                    if (!fres.isInTrash())

                                files.add(fres);

                Collections.sort(files, new Comparator<File>() {

                        @Override

                        public int compare(File arg0, File arg1) {

                                return arg0.getName().compareTo(arg1.getName());

                        }

                });

                folderFileCount = files.size();

                nameHeader.setSorted(true);

                nameHeader.toggleReverseSort();

                for (SortableHeader otherHeader : allHeaders) {

                if (otherHeader != nameHeader) {

                    otherHeader.setSorted(false);

                    otherHeader.setReverseSort(true);

                }

            }

        if(files.size() > GSS.VISIBLE_FILE_COUNT){

            pagerBottom.setVisible(true);

            pagerTop.setVisible(true);

        }

        else{

            pagerTop.setVisible(false);

            pagerBottom.setVisible(false);

        }

        Folder selectedItem = treeView.getSelection();

        provider.setList(files);

        }

        /**

         * Does the list contains the requested filename

         *

         * @param fileName

         * @return true/false

         */

        public boolean contains(String fileName) {

                for (int i = 0; i < files.size(); i++)

                        if (files.get(i).getName().equals(fileName))

                                return true;

                return false;

        }

        public void clearSelectedRows() {

                Iterator<File> it = selectionModel.getSelectedSet().iterator();

                while(it.hasNext()){

                        selectionModel.setSelected(it.next(),false);

                }

        }

        /**

         *

         */

        public void selectAllRows() {

                Iterator<File> it = provider.getList().iterator();

                while(it.hasNext()){

                        selectionModel.setSelected(it.next(),true);

                }

        }

        private void sortFiles(final String sortingProperty, final boolean sortingType){

                Collections.sort(files, new Comparator<File>() {

            @Override

            public int compare(File arg0, File arg1) {

                    AbstractImagePrototype descPrototype = AbstractImagePrototype.create(images.desc());

                    AbstractImagePrototype ascPrototype = AbstractImagePrototype.create(images.asc());

                    if (sortingType){

                            if (sortingProperty.equals("version")) {

                                    return arg0.getVersion() - arg1.getVersion();

                            } else if (sortingProperty.equals("owner")) {

                                    return arg0.getOwner().compareTo(arg1.getOwner());

                            } else if (sortingProperty.equals("date")) {

                                    return arg0.getLastModified().compareTo(arg1.getLastModified());

                            } else if (sortingProperty.equals("size")) {

                                    return (int) (arg0.getBytes() - arg1.getBytes());

                            } else if (sortingProperty.equals("name")) {

                                    return arg0.getName().compareTo(arg1.getName());

                            } else if (sortingProperty.equals("path")) {

                                    return arg0.getUri().compareTo(arg1.getUri());

                            } else {

                                    return arg0.getName().compareTo(arg1.getName());

                            }

                    }

                    else if (sortingProperty.equals("version")) {

                            return arg1.getVersion() - arg0.getVersion();

                    } else if (sortingProperty.equals("owner")) {

                            return arg1.getOwner().compareTo(arg0.getOwner());

                    } else if (sortingProperty.equals("date")) {

                            return arg1.getLastModified().compareTo(arg0.getLastModified());

                    } else if (sortingProperty.equals("size")) {

                            return (int) (arg1.getBytes() - arg0.getBytes());

                    } else if (sortingProperty.equals("name")) {

                            return arg1.getName().compareTo(arg0.getName());

                    } else if (sortingProperty.equals("path")) {

                            return arg1.getUri().compareTo(arg0.getUri());

                    } else {

                            return arg1.getName().compareTo(arg0.getName());

                    }

            }

                });

        }

        final class FileValueUpdater implements ValueUpdater<String>{

                private String property;

                private SortableHeader header;

                /**

                 * 

                 */

                public FileValueUpdater(SortableHeader header,String property) {

                        this.property=property;

                        this.header=header;

                }

                @Override

                public void update(String value) {

                        header.setSorted(true);

                        header.toggleReverseSort();

                for (SortableHeader otherHeader : allHeaders) {

                  if (otherHeader != header) {

                    otherHeader.setSorted(false);

                    otherHeader.setReverseSort(true);

                  }

                }

                celltable.redrawHeaders();

                sortFiles(property, header.getReverseSort());

                FileList.this.update(true);                        

                }

        }

        /**

         * Shows the files in the cellTable 

     */

        private void showCellTable(){

                if(files.size()>GSS.VISIBLE_FILE_COUNT){

                        pagerBottom.setVisible(true);

                        pagerTop.setVisible(true);

                }

                else{

                        pagerTop.setVisible(false);

                        pagerBottom.setVisible(false);

                }

                provider.setList(files);

                provider.refresh();

                //celltable.redraw();

                celltable.redrawHeaders();                

        }

}