Synnefo » Pithos

/*

 * Copyright (c) 2011 Greek Research and Technology Network

 */

package gr.grnet.pithos.web.client.foldertree;

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

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

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

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

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

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

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.CellTree;

import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;

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

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

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

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

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

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

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

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

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

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

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

import com.google.gwt.view.client.TreeViewModel.NodeInfo;

import gr.grnet.pithos.web.client.CellTreeViewModel;

import gr.grnet.pithos.web.client.CellTreeViewUtils;

import gr.grnet.pithos.web.client.FolderContextMenu;

import gr.grnet.pithos.web.client.GSS;

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

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

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

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

import java.util.Arrays;

public class FolderTreeView extends Composite {

    static interface BasicResources extends CellTree.Resources {

        @ImageOptions(flipRtl = true)

        @Source("cellTreeClosedItem.gif")

        ImageResource cellTreeClosedItem();

        @ImageOptions(flipRtl = true)

        @Source("cellTreeLoadingBasic.gif")

        ImageResource cellTreeLoading();

        @ImageOptions(flipRtl = true)

        @Source("cellTreeOpenItem.gif")

        ImageResource cellTreeOpenItem();

        @Source({"GssCellTreeBasic.css"})

        CellTree.Style cellTreeStyle();

    }

    static interface Images extends ClientBundle,Tree.Resources, FolderContextMenu.Images {

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

        ImageResource home();

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

        ImageResource folderYellow();

    }

    private static Images images = GWT.create(Images.class);

    static interface Templates extends SafeHtmlTemplates {

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

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

        public SafeHtml nameSpan(String name);

      }

    static class FolderCell extends AbstractCell<Folder> {

        @Override

        public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {

            String html = AbstractImagePrototype.create(images.folderYellow()).getHTML();

            safeHtmlBuilder.appendHtmlConstant(html);

            safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));

        }

    }

    private SingleSelectionModel<Folder> selectionModel = new SingleSelectionModel<Folder>();

    public FolderTreeView() {

        final FolderTreeViewModel model = new FolderTreeViewModel(selectionModel);

        /*

         * Create the tree using the model. We use <code>null</code> as the default

         * value of the root node. The default value will be passed to

         * CustomTreeModel#getNodeInfo();

         */

        CellTree.Resources res = GWT.create(BasicResources.class);

        DragAndDropCellTree tree = new DragAndDropCellTree(model,null, res);

        tree.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);

        Handler selectionHandler = new SelectionChangeEvent.Handler() {

            @Override

            public void onSelectionChange(com.google.gwt.view.client.SelectionChangeEvent event) {

                NodeInfo<Folder> nodeInfo = (NodeInfo<Folder>) model.getNodeInfo(selectionModel.getSelectedObject());

                if(nodeInfo == null || nodeInfo.getValueUpdater() == null) {

                    //GSS.get().showFileList(selectionModel.getSelectedObject());

                }

                else

                    nodeInfo.getValueUpdater().update(selectionModel.getSelectedObject());

                GSS.get().setCurrentSelection(selectionModel.getSelectedObject());

            }

        };

        selectionModel.addSelectionChangeHandler(selectionHandler);

        sinkEvents(Event.ONCONTEXTMENU);

        sinkEvents(Event.ONMOUSEUP);

        initWidget(tree);

    }

}