code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/grouptree/GroupTreeViewModel.java

   1 /*
   2  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35
  36 package gr.grnet.pithos.web.client.grouptree;
  37
  38 import gr.grnet.pithos.web.client.Pithos;
  39 import gr.grnet.pithos.web.client.commands.CreateGroupCommand;
  40 import gr.grnet.pithos.web.client.foldertree.File;
  41 import gr.grnet.pithos.web.client.grouptree.GroupTreeView.Templates;
  42
  43 import java.util.HashMap;
  44 import java.util.HashSet;
  45 import java.util.Map;
  46
  47 import com.google.gwt.cell.client.AbstractCell;
  48 import com.google.gwt.cell.client.Cell;
  49 import com.google.gwt.event.dom.client.ContextMenuEvent;
  50 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  51 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  52 import com.google.gwt.view.client.ListDataProvider;
  53 import com.google.gwt.view.client.SelectionChangeEvent;
  54 import com.google.gwt.view.client.SingleSelectionModel;
  55 import com.google.gwt.view.client.TreeViewModel;
  56
  57 public class GroupTreeViewModel implements TreeViewModel {
  58
  59     protected Pithos app;
  60
  61         private Cell<Group> groupCell = new AbstractCell<Group>(ContextMenuEvent.getType().getName()) {
  62
  63                 @Override
  64                 public void render(Context context,     Group value, SafeHtmlBuilder sb) {
  65             String html = AbstractImagePrototype.create(GroupTreeView.images.group()).getHTML();
  66             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  67             sb.append(Templates.INSTANCE.nameSpan(value.getName()));
  68                 }
  69
  70         @Override
  71         public void onBrowserEvent(Cell.Context context, com.google.gwt.dom.client.Element parent, Group group, com.google.gwt.dom.client.NativeEvent event, com.google.gwt.cell.client.ValueUpdater<Group> valueUpdater) {
  72                 if (!group.equals(createGroup)) {
  73                     GroupTreeViewModel.this.groupSelectionModel.setSelected(group, true);
  74                     if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  75                         GroupContextMenu menu = new GroupContextMenu(app, GroupTreeView.images, group);
  76                         menu.setPopupPosition(event.getClientX(), event.getClientY());
  77                         menu.show();
  78                     }
  79                 }
  80         }
  81         };
  82
  83     private Cell<User> userCell = new AbstractCell<User>(ContextMenuEvent.getType().getName()) {
  84
  85                 @Override
  86                 public void render(Context context,     User value, SafeHtmlBuilder sb) {
  87             String html = AbstractImagePrototype.create(GroupTreeView.images.user()).getHTML();
  88             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  89             sb.append(Templates.INSTANCE.nameSpan(value.getName()));
  90                 }
  91
  92         @Override
  93         public void onBrowserEvent(Cell.Context context, com.google.gwt.dom.client.Element parent, User user, com.google.gwt.dom.client.NativeEvent event, com.google.gwt.cell.client.ValueUpdater<User> valueUpdater) {
  94             GroupTreeViewModel.this.userSelectionModel.setSelected(user, true);
  95             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  96                 UserContextMenu menu = new UserContextMenu(app, GroupTreeView.images, user);
  97                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  98                 menu.show();
  99             }
 100         }
 101     };
 102
 103     protected ListDataProvider<Group> groupsDataProvider = new ListDataProvider<Group>();
 104
 105     protected Map<Group, ListDataProvider<User>> userDataProviderMap = new HashMap<Group, ListDataProvider<User>>();
 106
 107     SingleSelectionModel<Group> groupSelectionModel;
 108     SingleSelectionModel<User> userSelectionModel;
 109
 110     final Group createGroup = new Group("Create new group...");
 111
 112     public GroupTreeViewModel(Pithos _app) {
 113         app = _app;
 114
 115         groupSelectionModel = new SingleSelectionModel<Group>();
 116         app.addSelectionModel(groupSelectionModel);
 117         groupSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 118
 119                         @Override
 120                         public void onSelectionChange(SelectionChangeEvent event) {
 121                                 Group selected = groupSelectionModel.getSelectedObject();
 122                                 if (selected != null) {
 123                                         app.deselectOthers(app.getGroupTreeView(), groupSelectionModel);
 124                                         app.showFiles(new HashSet<File>());
 125                                         app.disableUploadArea();
 126                                         app.upload.setEnabled(false);
 127                                         app.showRelevantToolbarButtons();
 128                                         if (selected.equals(createGroup)) {
 129                                                 new CreateGroupCommand(app, null).execute();
 130                                                 groupSelectionModel.setSelected(createGroup, false);
 131                                         }
 132                                 }
 133                                 else {
 134                                         if (app.getSelectedTree().equals(app.getGroupTreeView()))
 135                                                 app.setSelectedTree(null);
 136                                         if (app.getSelectedTree() == null)
 137                                                 app.showRelevantToolbarButtons();
 138                                 }
 139                         }
 140                 });
 141
 142         userSelectionModel = new SingleSelectionModel<User>();
 143         app.addSelectionModel(userSelectionModel);
 144         userSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 145
 146                         @Override
 147                         public void onSelectionChange(SelectionChangeEvent event) {
 148                                 if (userSelectionModel.getSelectedObject() != null) {
 149                                         app.deselectOthers(app.getGroupTreeView(), userSelectionModel);
 150                                         app.showFiles(new HashSet<File>());
 151                                         app.showRelevantToolbarButtons();
 152                                 }
 153                                 else {
 154                                         if (app.getSelectedTree().equals(app.getGroupTreeView()))
 155                                                 app.setSelectedTree(null);
 156                                         if (app.getSelectedTree() == null)
 157                                                 app.showRelevantToolbarButtons();
 158                                 }
 159                         }
 160                 });
 161 }
 162
 163     @Override
 164     public <T> NodeInfo<?> getNodeInfo(T value) {
 165         if (value == null) {
 166                 groupsDataProvider.getList().clear();
 167                 groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 168                 groupsDataProvider.getList().add(createGroup);
 169             return new DefaultNodeInfo<Group>(groupsDataProvider, groupCell, groupSelectionModel, null);
 170         }
 171         Group g = (Group) value;
 172                 if (userDataProviderMap.get(g) == null) {
 173                         userDataProviderMap.put(g, new ListDataProvider<User>());
 174                 }
 175                 final ListDataProvider<User> dataProvider = userDataProviderMap.get(g);
 176                 dataProvider.getList().clear();
 177                 for (String u : g.getMembers())
 178                         dataProvider.getList().add(new User(u, g.getName()));
 179         return new DefaultNodeInfo<User>(dataProvider, userCell, userSelectionModel, null);
 180     }
 181
 182         @Override
 183     public boolean isLeaf(Object o) {
 184         if (o instanceof User) {
 185                 return true;
 186         }
 187         else if (o instanceof Group)
 188                 return ((Group) o).getMembers().isEmpty();
 189         return false;
 190     }
 191
 192         public void updateGroupNode(Group group) {
 193                 if (group == null) {
 194                         groupsDataProvider.getList().clear();
 195                         groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 196                 groupsDataProvider.getList().add(createGroup);
 197                 }
 198                 else {
 199                         if (userDataProviderMap.get(group) == null) {
 200                                 userDataProviderMap.put(group, new ListDataProvider<User>());
 201                         }
 202                         final ListDataProvider<User> dataProvider = userDataProviderMap.get(group);
 203                         dataProvider.getList().clear();
 204                         for (String u : group.getMembers())
 205                                 dataProvider.getList().add(new User(u, group.getName()));
 206                 }
 207         }
 208
 209         public Object getSelectedObject() {
 210                 if (groupSelectionModel.getSelectedObject() != null)
 211                         return groupSelectionModel.getSelectedObject();
 212                 if (userSelectionModel.getSelectedObject() != null)
 213                         return userSelectionModel.getSelectedObject();
 214                 return null;
 215         }
 216 }