code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/foldertree/FolderTreeView.java

   1 /*
   2  * Copyright (c) 2011 Greek Research and Technology Network
   3  */
   4
   5 package gr.grnet.pithos.web.client.foldertree;
   6
   7 import com.google.gwt.cell.client.AbstractCell;
   8 import com.google.gwt.cell.client.Cell;
   9 import com.google.gwt.core.client.GWT;
  10 import com.google.gwt.resources.client.ClientBundle;
  11 import com.google.gwt.resources.client.ImageResource;
  12 import com.google.gwt.resources.client.ImageResource.ImageOptions;
  13 import com.google.gwt.safehtml.client.SafeHtmlTemplates;
  14 import com.google.gwt.safehtml.shared.SafeHtml;
  15 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  16 import com.google.gwt.user.cellview.client.CellTree;
  17 import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
  18 import com.google.gwt.user.client.DeferredCommand;
  19 import com.google.gwt.user.client.Event;
  20 import com.google.gwt.user.client.IncrementalCommand;
  21 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  22 import com.google.gwt.user.client.ui.Composite;
  23 import com.google.gwt.user.client.ui.Tree;
  24 import com.google.gwt.view.client.ListDataProvider;
  25 import com.google.gwt.view.client.SelectionChangeEvent;
  26 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  27 import com.google.gwt.view.client.SingleSelectionModel;
  28 import com.google.gwt.view.client.TreeViewModel;
  29 import com.google.gwt.view.client.TreeViewModel.NodeInfo;
  30 import gr.grnet.pithos.web.client.CellTreeViewModel;
  31 import gr.grnet.pithos.web.client.CellTreeViewUtils;
  32 import gr.grnet.pithos.web.client.FolderContextMenu;
  33 import gr.grnet.pithos.web.client.GSS;
  34 import gr.grnet.pithos.web.client.rest.resource.FolderResource;
  35 import gr.grnet.pithos.web.client.rest.resource.RestResource;
  36 import gr.grnet.pithos.web.client.rest.resource.RestResourceWrapper;
  37 import gwtquery.plugins.droppable.client.gwt.DragAndDropCellTree;
  38 import java.util.Arrays;
  39
  40 public class FolderTreeView extends Composite {
  41
  42     static interface BasicResources extends CellTree.Resources {
  43
  44         @ImageOptions(flipRtl = true)
  45         @Source("cellTreeClosedItem.gif")
  46         ImageResource cellTreeClosedItem();
  47
  48         @ImageOptions(flipRtl = true)
  49         @Source("cellTreeLoadingBasic.gif")
  50         ImageResource cellTreeLoading();
  51
  52         @ImageOptions(flipRtl = true)
  53         @Source("cellTreeOpenItem.gif")
  54         ImageResource cellTreeOpenItem();
  55
  56         @Source({"GssCellTreeBasic.css"})
  57         CellTree.Style cellTreeStyle();
  58     }
  59
  60     static interface Images extends ClientBundle,Tree.Resources, FolderContextMenu.Images {
  61
  62         @Source("gr/grnet/pithos/resources/folder_home.png")
  63         ImageResource home();
  64
  65         @Source("gr/grnet/pithos/resources/folder_yellow.png")
  66         ImageResource folderYellow();
  67     }
  68
  69     private static Images images = GWT.create(Images.class);
  70
  71     static interface Templates extends SafeHtmlTemplates {
  72         Templates INSTANCE = GWT.create(Templates.class);
  73
  74         @Template("<span>{0}</span>")
  75         public SafeHtml nameSpan(String name);
  76       }
  77
  78     static class FolderCell extends AbstractCell<Folder> {
  79
  80         @Override
  81         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  82             String html = AbstractImagePrototype.create(images.folderYellow()).getHTML();
  83             safeHtmlBuilder.appendHtmlConstant(html);
  84             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  85         }
  86     }
  87
  88     private SingleSelectionModel<Folder> selectionModel = new SingleSelectionModel<Folder>();
  89
  90     public FolderTreeView() {
  91         final FolderTreeViewModel model = new FolderTreeViewModel(selectionModel);
  92         /*
  93          * Create the tree using the model. We use <code>null</code> as the default
  94          * value of the root node. The default value will be passed to
  95          * CustomTreeModel#getNodeInfo();
  96          */
  97         CellTree.Resources res = GWT.create(BasicResources.class);
  98         DragAndDropCellTree tree = new DragAndDropCellTree(model,null, res);
  99
 100         tree.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);
 101
 102         Handler selectionHandler = new SelectionChangeEvent.Handler() {
 103             @Override
 104             public void onSelectionChange(com.google.gwt.view.client.SelectionChangeEvent event) {
 105                 NodeInfo<Folder> nodeInfo = (NodeInfo<Folder>) model.getNodeInfo(selectionModel.getSelectedObject());
 106                 if(nodeInfo == null || nodeInfo.getValueUpdater() == null) {
 107                     //GSS.get().showFileList(selectionModel.getSelectedObject());
 108                 }
 109                 else
 110                     nodeInfo.getValueUpdater().update(selectionModel.getSelectedObject());
 111                 GSS.get().setCurrentSelection(selectionModel.getSelectedObject());
 112
 113
 114             }
 115         };
 116         selectionModel.addSelectionChangeHandler(selectionHandler);
 117         sinkEvents(Event.ONCONTEXTMENU);
 118         sinkEvents(Event.ONMOUSEUP);
 119         initWidget(tree);
 120     }
 121 }