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.foldertree.File;
  40 import gr.grnet.pithos.web.client.grouptree.GroupTreeView.Templates;
  41
  42 import java.util.HashMap;
  43 import java.util.HashSet;
  44 import java.util.Map;
  45 import java.util.Set;
  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             GroupTreeViewModel.this.groupSelectionModel.setSelected(group, true);
  73             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  74                 GroupContextMenu menu = new GroupContextMenu(app, GroupTreeView.images, group);
  75                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  76                 menu.show();
  77             }
  78         }
  79         };
  80
  81     private Cell<User> userCell = new AbstractCell<User>(ContextMenuEvent.getType().getName()) {
  82
  83                 @Override
  84                 public void render(Context context,     User value, SafeHtmlBuilder sb) {
  85             String html = AbstractImagePrototype.create(GroupTreeView.images.user()).getHTML();
  86             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  87             sb.append(Templates.INSTANCE.nameSpan(value.getName()));
  88                 }
  89
  90         @Override
  91         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) {
  92             GroupTreeViewModel.this.userSelectionModel.setSelected(user, true);
  93             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  94                 UserContextMenu menu = new UserContextMenu(app, GroupTreeView.images, user);
  95                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  96                 menu.show();
  97             }
  98         }
  99     };
 100
 101     protected ListDataProvider<Group> groupsDataProvider = new ListDataProvider<Group>();
 102
 103     protected Map<Group, ListDataProvider<User>> userDataProviderMap = new HashMap<Group, ListDataProvider<User>>();
 104
 105     SingleSelectionModel<Group> groupSelectionModel;
 106     SingleSelectionModel<User> userSelectionModel;
 107
 108     public GroupTreeViewModel(Pithos _app) {
 109         app = _app;
 110
 111         groupSelectionModel = new SingleSelectionModel<Group>();
 112         app.addSelectionModel(groupSelectionModel);
 113         groupSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 114
 115                         @Override
 116                         public void onSelectionChange(SelectionChangeEvent event) {
 117                                 if (groupSelectionModel.getSelectedObject() != null) {
 118                                         app.deselectOthers(app.getGroupTreeView(), groupSelectionModel);
 119                                         app.showFiles(new HashSet<File>());
 120                                         app.showRelevantToolbarButtons();
 121                                 }
 122                                 else {
 123                                         if (app.getSelectedTree().equals(app.getGroupTreeView()))
 124                                                 app.setSelectedTree(null);
 125                                         if (app.getSelectedTree() == null)
 126                                                 app.showRelevantToolbarButtons();
 127                                 }
 128                         }
 129                 });
 130
 131         userSelectionModel = new SingleSelectionModel<User>();
 132         app.addSelectionModel(userSelectionModel);
 133         userSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 134
 135                         @Override
 136                         public void onSelectionChange(SelectionChangeEvent event) {
 137                                 if (userSelectionModel.getSelectedObject() != null) {
 138                                         app.deselectOthers(app.getGroupTreeView(), userSelectionModel);
 139                                         app.showFiles(new HashSet<File>());
 140                                         app.showRelevantToolbarButtons();
 141                                 }
 142                                 else {
 143                                         if (app.getSelectedTree().equals(app.getGroupTreeView()))
 144                                                 app.setSelectedTree(null);
 145                                         if (app.getSelectedTree() == null)
 146                                                 app.showRelevantToolbarButtons();
 147                                 }
 148                         }
 149                 });
 150 }
 151
 152     @Override
 153     public <T> NodeInfo<?> getNodeInfo(T value) {
 154         if (value == null) {
 155                 groupsDataProvider.getList().clear();
 156                 groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 157             return new DefaultNodeInfo<Group>(groupsDataProvider, groupCell, groupSelectionModel, null);
 158         }
 159         Group g = (Group) value;
 160                 if (userDataProviderMap.get(g) == null) {
 161                         userDataProviderMap.put(g, new ListDataProvider<User>());
 162                 }
 163                 final ListDataProvider<User> dataProvider = userDataProviderMap.get(g);
 164                 dataProvider.getList().clear();
 165                 for (String u : g.getMembers())
 166                         dataProvider.getList().add(new User(u, g));
 167         return new DefaultNodeInfo<User>(dataProvider, userCell, userSelectionModel, null);
 168     }
 169
 170         @Override
 171     public boolean isLeaf(Object o) {
 172         if (o instanceof String) {
 173                 return ((String) o).length() == 0 || app.getAccount().getGroups().isEmpty();
 174         }
 175         else if (o instanceof Group)
 176                 return ((Group) o).getMembers().isEmpty();
 177         else if (o != null)
 178                 return true;
 179         return false;
 180     }
 181
 182         public void updateGroupNode(Group group) {
 183                 if (group == null) {
 184                         groupsDataProvider.getList().clear();
 185                         groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 186                 }
 187                 else {
 188                         if (userDataProviderMap.get(group) == null) {
 189                                 userDataProviderMap.put(group, new ListDataProvider<User>());
 190                         }
 191                         final ListDataProvider<User> dataProvider = userDataProviderMap.get(group);
 192                         dataProvider.getList().clear();
 193                         for (String u : group.getMembers())
 194                                 dataProvider.getList().add(new User(u, group));
 195                 }
 196         }
 197
 198         public Object getSelectedObject() {
 199                 if (groupSelectionModel.getSelectedObject() != null)
 200                         return groupSelectionModel.getSelectedObject();
 201                 if (userSelectionModel.getSelectedObject() != null)
 202                         return userSelectionModel.getSelectedObject();
 203                 return null;
 204         }
 205 }