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

   1 /*\r
   2  * Copyright 2007, 2008, 2009 Electronic Business Systems Ltd.\r
   3  *\r
   4  * This file is part of GSS.\r
   5  *\r
   6  * GSS is free software: you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation, either version 3 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * GSS is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.\r
  18  */\r
  19 package gr.ebs.gss.client;\r
  20 \r
  21 import gr.ebs.gss.client.rest.GetCommand;\r
  22 import gr.ebs.gss.client.rest.MultipleGetCommand;\r
  23 import gr.ebs.gss.client.rest.resource.GroupResource;\r
  24 import gr.ebs.gss.client.rest.resource.GroupUserResource;\r
  25 import gr.ebs.gss.client.rest.resource.GroupsResource;\r
  26 \r
  27 import java.util.List;\r
  28 \r
  29 import com.gargoylesoftware.htmlunit.javascript.host.KeyboardEvent;\r
  30 import com.google.gwt.core.client.GWT;\r
  31 import com.google.gwt.dom.client.NativeEvent;\r
  32 import com.google.gwt.event.dom.client.ContextMenuEvent;\r
  33 import com.google.gwt.event.dom.client.ContextMenuHandler;\r
  34 import com.google.gwt.event.logical.shared.OpenEvent;\r
  35 import com.google.gwt.event.logical.shared.OpenHandler;\r
  36 import com.google.gwt.event.logical.shared.SelectionEvent;\r
  37 import com.google.gwt.event.logical.shared.SelectionHandler;\r
  38 import com.google.gwt.resources.client.ClientBundle;\r
  39 import com.google.gwt.resources.client.ImageResource;\r
  40 import com.google.gwt.user.client.DOM;\r
  41 import com.google.gwt.user.client.DeferredCommand;\r
  42 import com.google.gwt.user.client.Event;\r
  43 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  44 import com.google.gwt.user.client.ui.Composite;\r
  45 import com.google.gwt.user.client.ui.HTML;\r
  46 import com.google.gwt.user.client.ui.Tree;\r
  47 import com.google.gwt.user.client.ui.TreeItem;\r
  48 \r
  49 /**\r
  50  * A component that displays a list of the user's groups.\r
  51  */\r
  52 public class Groups extends Composite implements SelectionHandler, OpenHandler {\r
  53 \r
  54         /**\r
  55          * An image bundle for this widget.\r
  56          */\r
  57         public interface Images extends Tree.Resources, ClientBundle, FileMenu.Images, EditMenu.Images, GroupMenu.Images, MessagePanel.Images {\r
  58 \r
  59                 /**\r
  60                  * Will bundle the file 'groupevent.png' residing in the package\r
  61                  * 'gr.ebs.gss.resources'.\r
  62                  *\r
  63                  * @return the image prototype\r
  64                  */\r
  65                 @Source("gr/ebs/gss/resources/groupevent.png")\r
  66                 ImageResource groupImage();\r
  67 \r
  68                 @Override\r
  69                 @Source("gr/ebs/gss/resources/editdelete.png")\r
  70                 ImageResource delete();\r
  71 \r
  72         }\r
  73 \r
  74         /**\r
  75          * cached latest group selection (for selecting and expanding on refresh)\r
  76          */\r
  77         private String selectedGroup = null;\r
  78 \r
  79         /**\r
  80          * The tree widget that displays the groups.\r
  81          */\r
  82         private Tree tree;\r
  83 \r
  84         /**\r
  85          * A cached copy of the currently selected group widget.\r
  86          */\r
  87         private TreeItem current;\r
  88 \r
  89         /**\r
  90          * A cached copy of the previously selected group widget.\r
  91          */\r
  92         private TreeItem previous;\r
  93 \r
  94         /**\r
  95          * The widget's image bundle.\r
  96          */\r
  97         private final Images images;\r
  98 \r
  99         private GroupContextMenu menu;\r
 100 \r
 101         /**\r
 102          * Constructs a new groups widget with a bundle of images.\r
 103          *\r
 104          * @param newImages a bundle that provides the images for this widget\r
 105          */\r
 106         public Groups(final Images newImages) {\r
 107 \r
 108                 images = newImages;\r
 109                 menu = new GroupContextMenu(images);\r
 110                 tree = new Tree(newImages);\r
 111                 this.addHandler(new ContextMenuHandler() {\r
 112 \r
 113                         @Override\r
 114                         public void onContextMenu(ContextMenuEvent event) {\r
 115                                 if(current==null) return;\r
 116                                 int left = current.getAbsoluteLeft() + 40;\r
 117                                 int top = current.getAbsoluteTop() + 20;\r
 118                                 showPopup(left, top);\r
 119 \r
 120                         }\r
 121                 }, ContextMenuEvent.getType());\r
 122                 tree.getElement().setId("groupsList.tree");\r
 123                 tree.addSelectionHandler(this);\r
 124                 tree.addOpenHandler(this);\r
 125                 tree.setAnimationEnabled(true);\r
 126                 initWidget(tree);\r
 127                 this.getElement().setAttribute("id", "CreativeFilesPanel");\r
 128                 setStylePrimaryName("gss-Groups");\r
 129                 sinkEvents(Event.ONCONTEXTMENU);\r
 130                 sinkEvents(Event.ONMOUSEUP);\r
 131                 sinkEvents(Event.ONDBLCLICK);\r
 132                 sinkEvents(Event.KEYEVENTS);\r
 133         }\r
 134 \r
 135 \r
 136         /**\r
 137          * Make an RPC call to retrieve the groups that belong to the specified\r
 138          * user.\r
 139          */\r
 140         public void updateGroups() {\r
 141                 GetCommand<GroupsResource> gg = new GetCommand<GroupsResource>(GroupsResource.class, GSS.get().getCurrentUserResource().getGroupsPath(),null){\r
 142 \r
 143                         @Override\r
 144                         public void onComplete() {\r
 145                                 GroupsResource res = getResult();\r
 146                                 MultipleGetCommand<GroupResource> ga = new MultipleGetCommand<GroupResource>(GroupResource.class, res.getGroupPaths().toArray(new String[]{}), null){\r
 147 \r
 148                                         @Override\r
 149                                         public void onComplete() {\r
 150                                                 List<GroupResource> groupList = getResult();\r
 151                                                 tree.clear();\r
 152                                                 for (int i = 0; i < groupList.size(); i++) {\r
 153                                                         final TreeItem item = new TreeItem();\r
 154                                                         item.setWidget(imageItemHTML(images.groupImage(), groupList.get(i).getName(),item));\r
 155                                                         item.setUserObject(groupList.get(i));                                                   \r
 156                                                         tree.addItem(item);\r
 157                                                         updateUsers(item);\r
 158                                                 }\r
 159                                         }\r
 160 \r
 161                                         @Override\r
 162                                         public void onError(Throwable t) {\r
 163                                                 GWT.log("", t);\r
 164                                         }\r
 165 \r
 166                                         @Override\r
 167                                         public void onError(String p, Throwable throwable) {\r
 168                                                 GWT.log("Path:"+p, throwable);\r
 169                                         }\r
 170                                 };\r
 171                                 DeferredCommand.addCommand(ga);\r
 172                         }\r
 173 \r
 174                         @Override\r
 175                         public void onError(Throwable t) {\r
 176 \r
 177                         }\r
 178                 };\r
 179                 DeferredCommand.addCommand(gg);\r
 180         }\r
 181 \r
 182         /**\r
 183          *  update status panel with currently showing file stats\r
 184          */\r
 185         public void updateCurrentlyShowingStats() {\r
 186                 GSS.get().getStatusPanel().updateCurrentlyShowing(null); //clear stats - nothing to show for the groups tab\r
 187         }\r
 188 \r
 189         /**\r
 190          * A helper method to simplify adding tree items that have attached images.\r
 191          * {@link #addImageItem(TreeItem, String) code}\r
 192          *\r
 193          * @param parent the tree item to which the new item will be added.\r
 194          * @param title the text associated with this item.\r
 195          * @param imageProto\r
 196          * @return the new tree item\r
 197          */\r
 198         private TreeItem addImageItem(final TreeItem parent, final String title, final ImageResource imageProto) {\r
 199                 final TreeItem item = new TreeItem();\r
 200                 item.setWidget(imageItemHTML(imageProto, title,item));\r
 201                 parent.addItem(item);\r
 202                 return item;\r
 203         }\r
 204 \r
 205         /**\r
 206          * Generates HTML for a tree item with an attached icon.\r
 207          *\r
 208          * @param imageProto the icon image\r
 209          * @param title the title of the item\r
 210          * @return the resultant HTML\r
 211          */\r
 212         private HTML imageItemHTML(final ImageResource imageProto, final String title,final TreeItem item) {\r
 213                 final HTML link = new HTML("<a class='hidden-link' href='javascript:;'>" + "<span id='groupsList."+title+"'>" + AbstractImagePrototype.create(imageProto).getHTML() + "&nbsp;" + title + "</span>" + "</a>"){\r
 214                         @Override\r
 215                         public void onBrowserEvent(Event event) {\r
 216                                 switch (DOM.eventGetType(event)) {\r
 217                                         case Event.ONMOUSEDOWN:\r
 218                                                 if (DOM.eventGetButton(event) == NativeEvent.BUTTON_RIGHT || DOM.eventGetButton(event) == NativeEvent.BUTTON_LEFT)\r
 219                                                         onSelection(item);\r
 220                                                 break;\r
 221                                 }\r
 222                                 super.onBrowserEvent(event);\r
 223 \r
 224                         }\r
 225                 };                      \r
 226                 link.sinkEvents(Event.ONMOUSEDOWN);\r
 227                 link.sinkEvents(Event.ONCONTEXTMENU);\r
 228                 link.sinkEvents(Event.ONCLICK);\r
 229                 link.sinkEvents(Event.ONKEYDOWN);               \r
 230                 return link;\r
 231         }\r
 232 \r
 233 \r
 234 \r
 235         protected void showPopup(final int x, final int y) {\r
 236                 if (getCurrent() == null){\r
 237                         GWT.log("[POPUP IS NULL]", null);\r
 238                         return;\r
 239                 }\r
 240                 menu.hide();\r
 241                 menu = new GroupContextMenu(images);\r
 242                 menu.setPopupPosition(x, y);\r
 243                 menu.show();\r
 244         }\r
 245 \r
 246 \r
 247 \r
 248         /**\r
 249          * Generate an RPC request to retrieve the users of the specified group for\r
 250          * display.\r
 251          *\r
 252          * @param userId the ID of the current user\r
 253          * @param groupItem the TreeItem widget that corresponds to the requested\r
 254          *            group\r
 255          */\r
 256         void updateUsers(final TreeItem groupItem) {\r
 257                 if(groupItem.getUserObject() instanceof GroupResource){\r
 258                         GroupResource res = (GroupResource) groupItem.getUserObject();\r
 259                         MultipleGetCommand<GroupUserResource> gu = new MultipleGetCommand<GroupUserResource>(GroupUserResource.class, res.getUserPaths().toArray(new String[]{}), null){\r
 260                                 @Override\r
 261                                 public void onComplete() {\r
 262                                         List<GroupUserResource> users = getResult();\r
 263                                         groupItem.removeItems();\r
 264                                         for (int i = 0; i < users.size(); i++) {\r
 265                                                 final TreeItem userItem = addImageItem(groupItem, users.get(i).getName() + " &lt;" + users.get(i).getUsername() + "&gt;", images.permUser());\r
 266                                                 userItem.setUserObject(users.get(i));\r
 267                                         }\r
 268                                         if (selectedGroup != null && groupItem.getText().equals(selectedGroup)) {\r
 269                                                 //SelectionEvent.fire(tree, groupItem);;\r
 270                                                 onSelection(groupItem);\r
 271                                                 groupItem.setState(true);\r
 272                                         }\r
 273                                 }\r
 274 \r
 275                                 @Override\r
 276                                 public void onError(Throwable t) {\r
 277                                         GWT.log("", t);\r
 278                                 }\r
 279 \r
 280                                 @Override\r
 281                                 public void onError(String p, Throwable throwable) {\r
 282                                         GWT.log("Path:"+p, throwable);\r
 283                                 }\r
 284                         };\r
 285                         DeferredCommand.addCommand(gu);\r
 286                 }\r
 287 \r
 288         }\r
 289 \r
 290         /**\r
 291          * Retrieve the current.\r
 292          *\r
 293          * @return the current\r
 294          */\r
 295         TreeItem getCurrent() {\r
 296                 return current;\r
 297         }\r
 298 \r
 299         /**\r
 300          * Modify the current.\r
 301          *\r
 302          * @param newCurrent the current to set\r
 303          */\r
 304         void setCurrent(final TreeItem newCurrent) {\r
 305                 current = newCurrent;\r
 306         }\r
 307 \r
 308         /**\r
 309          * Retrieve the previous.\r
 310          *\r
 311          * @return the previous\r
 312          */\r
 313         private TreeItem getPrevious() {\r
 314                 return previous;\r
 315         }\r
 316 \r
 317         /**\r
 318          * Modify the previous.\r
 319          *\r
 320          * @param newPrevious the previous to set\r
 321          */\r
 322         private void setPrevious(final TreeItem newPrevious) {\r
 323                 previous = newPrevious;\r
 324         }\r
 325 \r
 326         @Override\r
 327         public void setVisible(final boolean visible) {\r
 328                 super.setVisible(visible);\r
 329                 if (visible)\r
 330                         updateGroups();\r
 331         }\r
 332 \r
 333         @Override\r
 334         public void onSelection(SelectionEvent event) {\r
 335                 final TreeItem item = (TreeItem)event.getSelectedItem();\r
 336                 onSelection(item);\r
 337 \r
 338         }\r
 339 \r
 340         private void onSelection(TreeItem item){\r
 341                 final Object selected = item.getUserObject();\r
 342                 // Preserve the previously selected item, so that the current's\r
 343                 // onClick() method gets a chance to find it.\r
 344                 if (getPrevious() != null)\r
 345                         getPrevious().getWidget().removeStyleName("gss-SelectedRow");\r
 346                 setCurrent(item);\r
 347                 getCurrent().getWidget().addStyleName("gss-SelectedRow");\r
 348                 setPrevious(getCurrent());\r
 349                 GSS.get().setCurrentSelection(selected);\r
 350                 //cache the latest top level node (group) for selecting and expanding on refresh\r
 351                 if (item.getParentItem() == null)\r
 352                         selectedGroup = item.getText();\r
 353                 else\r
 354                         selectedGroup = item.getParentItem().getText();\r
 355         }\r
 356 \r
 357         @Override\r
 358         public void onOpen(OpenEvent event) {\r
 359                 final TreeItem item = (TreeItem) event.getTarget();\r
 360                 updateUsers(item);\r
 361         }\r
 362 }\r