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 com.google.gwt.cell.client.AbstractCell;
  39 import com.google.gwt.cell.client.Cell;
  40 import com.google.gwt.event.dom.client.ContextMenuEvent;
  41 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  42 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  43 import com.google.gwt.view.client.ListDataProvider;
  44 import com.google.gwt.view.client.SelectionChangeEvent;
  45 import com.google.gwt.view.client.SingleSelectionModel;
  46 import com.google.gwt.view.client.TreeViewModel;
  47 import gr.grnet.pithos.web.client.Pithos;
  48 import gr.grnet.pithos.web.client.commands.CreateGroupCommand;
  49 import gr.grnet.pithos.web.client.foldertree.File;
  50 import gr.grnet.pithos.web.client.grouptree.GroupTreeView.Templates;
  51
  52 import java.util.HashMap;
  53 import java.util.HashSet;
  54 import java.util.List;
  55 import java.util.Map;
  56
  57 public class GroupTreeViewModel implements TreeViewModel {
  58     final Group CreateGroupPlaceholder = new Group("Create new group...");
  59
  60     protected Pithos app;
  61
  62     private Cell<Group> groupCell = new AbstractCell<Group>(ContextMenuEvent.getType().getName()) {
  63
  64         @Override
  65         public void render(Context context, Group group, SafeHtmlBuilder sb) {
  66             String html = AbstractImagePrototype.create(GroupTreeView.images.group()).getHTML();
  67             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  68             sb.append(Templates.INSTANCE.nameSpan(group.getName()));
  69         }
  70
  71         @Override
  72         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) {
  73             if(!group.equals(CreateGroupPlaceholder)) {
  74                 GroupTreeViewModel.this.groupSelectionModel.setSelected(group, true);
  75                 if(event.getType().equals(ContextMenuEvent.getType().getName())) {
  76                     GroupContextMenu menu = new GroupContextMenu(app, GroupTreeView.images, group);
  77                     menu.setPopupPosition(event.getClientX(), event.getClientY());
  78                     menu.show();
  79                 }
  80             }
  81         }
  82     };
  83
  84     private Cell<User> userCell = new AbstractCell<User>(ContextMenuEvent.getType().getName()) {
  85
  86         @Override
  87         public void render(Context context, User user, final SafeHtmlBuilder sb) {
  88             String html = AbstractImagePrototype.create(GroupTreeView.images.user()).getHTML();
  89             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  90             final String userDisplayName = user.getUserDisplayName();
  91             sb.append(Templates.INSTANCE.nameSpan(userDisplayName));
  92         }
  93
  94         @Override
  95         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) {
  96             GroupTreeViewModel.this.userSelectionModel.setSelected(user, true);
  97             if(event.getType().equals(ContextMenuEvent.getType().getName())) {
  98                 UserContextMenu menu = new UserContextMenu(app, GroupTreeView.images, user);
  99                 menu.setPopupPosition(event.getClientX(), event.getClientY());
 100                 menu.show();
 101             }
 102         }
 103     };
 104
 105     protected ListDataProvider<Group> groupsDataProvider = new ListDataProvider<Group>();
 106
 107     protected Map<Group, ListDataProvider<User>> userDataProviderMap = new HashMap<Group, ListDataProvider<User>>();
 108
 109     SingleSelectionModel<Group> groupSelectionModel;
 110     SingleSelectionModel<User> userSelectionModel;
 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(CreateGroupPlaceholder)) {
 129                         new CreateGroupCommand(app, null).execute();
 130                         groupSelectionModel.setSelected(CreateGroupPlaceholder, false);
 131                     }
 132                 }
 133                 else {
 134                     if(app.getSelectedTree().equals(app.getGroupTreeView())) {
 135                         app.setSelectedTree(null);
 136                     }
 137                     if(app.getSelectedTree() == null) {
 138                         app.showRelevantToolbarButtons();
 139                     }
 140                 }
 141             }
 142         });
 143
 144         userSelectionModel = new SingleSelectionModel<User>();
 145         app.addSelectionModel(userSelectionModel);
 146         userSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 147
 148             @Override
 149             public void onSelectionChange(SelectionChangeEvent event) {
 150                 if(userSelectionModel.getSelectedObject() != null) {
 151                     app.deselectOthers(app.getGroupTreeView(), userSelectionModel);
 152                     app.showFiles(new HashSet<File>());
 153                     app.showRelevantToolbarButtons();
 154                 }
 155                 else {
 156                     if(app.getSelectedTree().equals(app.getGroupTreeView())) {
 157                         app.setSelectedTree(null);
 158                     }
 159                     if(app.getSelectedTree() == null) {
 160                         app.showRelevantToolbarButtons();
 161                     }
 162                 }
 163             }
 164         });
 165     }
 166
 167     @Override
 168     public <T> NodeInfo<?> getNodeInfo(T value) {
 169         app.LOG("GroupTreeViewModel::getNodeInfo(), value = ", value);
 170         if(value == null) {
 171             groupsDataProvider.getList().clear();
 172             groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 173             groupsDataProvider.getList().add(CreateGroupPlaceholder);
 174             return new DefaultNodeInfo<Group>(groupsDataProvider, groupCell, groupSelectionModel, null);
 175         }
 176         final Group group = (Group) value;
 177         if(userDataProviderMap.get(group) == null) {
 178             userDataProviderMap.put(group, new ListDataProvider<User>());
 179         }
 180         final ListDataProvider<User> dataProvider = userDataProviderMap.get(group);
 181         dataProvider.getList().clear();
 182         final List<User> users = group.getUsers();
 183         for(User user : users) {
 184             app.LOG("GroupTreeViewModel::getNodeInfo(), Add ", user);
 185             dataProvider.getList().add(user);
 186         }
 187
 188
 189         return new DefaultNodeInfo<User>(dataProvider, userCell, userSelectionModel, null);
 190     }
 191
 192     @Override
 193     public boolean isLeaf(Object o) {
 194         if(o instanceof User) {
 195             return true;
 196         }
 197         else if(o instanceof Group) {
 198             return ((Group) o).getUsers().isEmpty();
 199         }
 200         return false;
 201     }
 202
 203     public void updateGroupNode(Group group) {
 204         if(group == null) {
 205             groupsDataProvider.getList().clear();
 206             groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 207             groupsDataProvider.getList().add(CreateGroupPlaceholder);
 208         }
 209         else {
 210             if(userDataProviderMap.get(group) == null) {
 211                 userDataProviderMap.put(group, new ListDataProvider<User>());
 212             }
 213             final ListDataProvider<User> dataProvider = userDataProviderMap.get(group);
 214             dataProvider.getList().clear();
 215             for(User user : group.getUsers()) {
 216                 app.LOG("GroupTreeViewModel::updateGroupNode(), group = ", group, ". Add ", user);
 217                 dataProvider.getList().add(user);
 218             }
 219         }
 220     }
 221
 222     public Object getSelectedObject() {
 223         if(groupSelectionModel.getSelectedObject() != null) {
 224             return groupSelectionModel.getSelectedObject();
 225         }
 226         if(userSelectionModel.getSelectedObject() != null) {
 227             return userSelectionModel.getSelectedObject();
 228         }
 229         return null;
 230     }
 231 }