code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/tree/Subtree.java

   1 /*
   2  * Copyright 2008, 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.client.tree;
  20
  21 import gr.ebs.gss.client.PopupTree;
  22 import gr.ebs.gss.client.Folders.Images;
  23 import gr.ebs.gss.client.dnd.DnDTreeItem;
  24 import gr.ebs.gss.client.rest.resource.FolderResource;
  25
  26 import java.util.LinkedList;
  27 import java.util.List;
  28
  29 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  30 import com.google.gwt.user.client.ui.HTML;
  31 import com.google.gwt.user.client.ui.TreeItem;
  32
  33 /**
  34  * @author kman
  35  */
  36 public abstract class Subtree {
  37
  38         protected PopupTree tree;
  39
  40         final Images images;
  41
  42         public Subtree(PopupTree aTree, final Images _images) {
  43                 images = _images;
  44                 tree = aTree;
  45         }
  46
  47         /**
  48          * A helper method to simplify adding tree items that have attached images.
  49          * {@link #addImageItem(TreeItem, String) code}
  50          *
  51          * @param parent the tree item to which the new item will be added.
  52          * @param title the text associated with this item.
  53          * @param imageProto the image of the item
  54          * @return
  55          */
  56         protected TreeItem addImageItem(final TreeItem parent, final String title, final AbstractImagePrototype imageProto, boolean draggable) {
  57                 final DnDTreeItem item = new DnDTreeItem(imageItemHTML(imageProto, title), title, draggable);
  58                 parent.addItem(item);
  59                 return item;
  60         }
  61
  62         /**
  63          * Generates HTML for a tree item with an attached icon.
  64          *
  65          * @param imageProto the image icon
  66          * @param title the title of the item
  67          * @return the resultant HTML
  68          */
  69         protected HTML imageItemHTML(final AbstractImagePrototype imageProto, final String title) {
  70                 HTML html = new HTML("<a class='hidden-link' href='javascript:;'><span >" + imageProto.getHTML() + "&nbsp;" + title + "</span></a>");
  71                 return html;
  72         }
  73
  74         public void updateSubFoldersLazily(DnDTreeItem folderItem, List<FolderResource> subfolders, AbstractImagePrototype image, AbstractImagePrototype sharedImage) {
  75                 for (int i = 0; i < folderItem.getChildCount(); i++) {
  76                         DnDTreeItem c = (DnDTreeItem) folderItem.getChild(i);
  77                         FolderResource f = (FolderResource) c.getUserObject();
  78                         if (!listContainsFolder(f, subfolders)) {
  79                                 c.undoDraggable();
  80                                 folderItem.removeItem(c);
  81                         }
  82                 }
  83
  84                 LinkedList<DnDTreeItem> itemList = new LinkedList();
  85                 for (FolderResource subfolder : subfolders) {
  86                         DnDTreeItem item = folderItem.getChild(subfolder);
  87                         if (item == null){
  88                                 if(subfolder.isShared())
  89                                         item = (DnDTreeItem) addImageItem(folderItem, subfolder.getName(), sharedImage, true);
  90                                 else
  91                                         item = (DnDTreeItem) addImageItem(folderItem, subfolder.getName(), image, true);
  92                         } else if(subfolder.isShared())
  93                                 item.updateWidget(imageItemHTML(sharedImage, subfolder.getName()));
  94                         else
  95                                 item.updateWidget(imageItemHTML(image, subfolder.getName()));
  96                         item.setUserObject(subfolder);
  97                         itemList.add(item);
  98                 }
  99                 for (DnDTreeItem it : itemList)
 100                         it.remove();
 101                 for (DnDTreeItem it : itemList)
 102                         folderItem.addItem(it);
 103                 for (int i = 0; i < folderItem.getChildCount(); i++) {
 104                         DnDTreeItem c = (DnDTreeItem) folderItem.getChild(i);
 105                         c.doDraggable();
 106                 }
 107         }
 108
 109         private boolean listContainsFolder(FolderResource folder, List<FolderResource> subfolders) {
 110                 for (FolderResource f : subfolders)
 111                         if (f.getUri().equals(folder.getUri()))
 112                                 return true;
 113                 return false;
 114         }
 115
 116 }