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.google.gwt.core.client.GWT;\r
  30 import com.google.gwt.user.client.DOM;\r
  31 import com.google.gwt.user.client.DeferredCommand;\r
  32 import com.google.gwt.user.client.Event;\r
  33 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  34 import com.google.gwt.user.client.ui.Composite;\r
  35 import com.google.gwt.user.client.ui.HTML;\r
  36 import com.google.gwt.user.client.ui.KeyboardListener;\r
  37 import com.google.gwt.user.client.ui.Tree;\r
  38 import com.google.gwt.user.client.ui.TreeImages;\r
  39 import com.google.gwt.user.client.ui.TreeItem;\r
  40 import com.google.gwt.user.client.ui.TreeListener;\r
  41 \r
  42 /**\r
  43  * A component that displays a list of the user's groups.\r
  44  */\r
  45 public class Groups extends Composite implements TreeListener {\r
  46 \r
  47         /**\r
  48          * An image bundle for this widget.\r
  49          */\r
  50         public interface Images extends TreeImages, FileMenu.Images, EditMenu.Images, GroupMenu.Images, MessagePanel.Images {\r
  51 \r
  52                 /**\r
  53                  * Will bundle the file 'groupevent.png' residing in the package\r
  54                  * 'gr.ebs.gss.resources'.\r
  55                  *\r
  56                  * @return the image prototype\r
  57                  */\r
  58                 @Resource("gr/ebs/gss/resources/groupevent.png")\r
  59                 AbstractImagePrototype groupImage();\r
  60 \r
  61                 @Resource("gr/ebs/gss/resources/editdelete.png")\r
  62                 AbstractImagePrototype delete();\r
  63         }\r
  64         private boolean ctrlKeyPressed = false;\r
  65 \r
  66         private boolean leftClicked = false;\r
  67 \r
  68         private boolean rightClicked = false;\r
  69 \r
  70 \r
  71         /**\r
  72          * The tree widget that displays the groups.\r
  73          */\r
  74         private Tree tree;\r
  75 \r
  76         /**\r
  77          * A cached copy of the currently selected group widget.\r
  78          */\r
  79         private TreeItem current;\r
  80 \r
  81         /**\r
  82          * A cached copy of the previously selected group widget.\r
  83          */\r
  84         private TreeItem previous;\r
  85 \r
  86         /**\r
  87          * A cached copy of the currently changed group widget.\r
  88          */\r
  89         private TreeItem changed;\r
  90 \r
  91         /**\r
  92          * The widget's image bundle.\r
  93          */\r
  94         private final Images images;\r
  95 \r
  96         private GroupContextMenu menu;\r
  97         /**\r
  98          * Constructs a new groups widget with a bundle of images.\r
  99          *\r
 100          * @param newImages a bundle that provides the images for this widget\r
 101          */\r
 102         public Groups(final Images newImages) {\r
 103 \r
 104                 images = newImages;\r
 105                 menu = new GroupContextMenu(images);\r
 106                 tree = new Tree(newImages);\r
 107                 tree.addTreeListener(this);\r
 108                 initWidget(tree);\r
 109                 setStylePrimaryName("gss-Groups");\r
 110                 sinkEvents(Event.ONCONTEXTMENU);\r
 111                 sinkEvents(Event.ONMOUSEUP);\r
 112         }\r
 113 \r
 114         @Override\r
 115         public void onBrowserEvent(Event event) {\r
 116                 switch (DOM.eventGetType(event)) {\r
 117                         case Event.ONKEYDOWN:\r
 118                                 int key = DOM.eventGetKeyCode(event);\r
 119                                 if (key == KeyboardListener.KEY_CTRL)\r
 120                                         ctrlKeyPressed = true;\r
 121                                 break;\r
 122 \r
 123                         case Event.ONKEYUP:\r
 124                                 key = DOM.eventGetKeyCode(event);\r
 125                                 if (key == KeyboardListener.KEY_CTRL)\r
 126                                         ctrlKeyPressed = false;\r
 127                                 break;\r
 128 \r
 129                         case Event.ONMOUSEDOWN:\r
 130                                 if (DOM.eventGetButton(event) == Event.BUTTON_RIGHT)\r
 131                                         rightClicked = true;\r
 132                                 else if (DOM.eventGetButton(event) == Event.BUTTON_LEFT)\r
 133                                         leftClicked = true;\r
 134                                 break;\r
 135 \r
 136                         case Event.ONMOUSEUP:\r
 137                                 if (DOM.eventGetButton(event) == Event.BUTTON_RIGHT)\r
 138                                         rightClicked = false;\r
 139                                 else if (DOM.eventGetButton(event) == Event.BUTTON_LEFT)\r
 140                                         leftClicked = false;\r
 141                                 break;\r
 142                 }\r
 143 \r
 144                 super.onBrowserEvent(event);\r
 145         }\r
 146         /**\r
 147          * Make an RPC call to retrieve the groups that belong to the specified\r
 148          * user.\r
 149          */\r
 150         public void updateGroups() {\r
 151                 GetCommand<GroupsResource> gg = new GetCommand<GroupsResource>(GroupsResource.class, GSS.get().getCurrentUserResource().getGroupsPath()){\r
 152 \r
 153                         @Override\r
 154                         public void onComplete() {\r
 155                                 GroupsResource res = getResult();\r
 156                                 MultipleGetCommand<GroupResource> ga = new MultipleGetCommand<GroupResource>(GroupResource.class, res.getGroupPaths().toArray(new String[]{})){\r
 157 \r
 158                                         @Override\r
 159                                         public void onComplete() {\r
 160                                                 List<GroupResource> groupList = getResult();\r
 161                                                 tree.clear();\r
 162                                                 for (int i = 0; i < groupList.size(); i++) {\r
 163                                                         final TreeItem item = new TreeItem(imageItemHTML(images.groupImage(), groupList.get(i).getName()));\r
 164                                                         item.setUserObject(groupList.get(i));\r
 165                                                         tree.addItem(item);\r
 166                                                         updateUsers( item);\r
 167                                                 }\r
 168                                         }\r
 169 \r
 170                                         @Override\r
 171                                         public void onError(Throwable t) {\r
 172                                                 GWT.log("", t);\r
 173                                         }\r
 174 \r
 175                                         @Override\r
 176                                         public void onError(String p, Throwable throwable) {\r
 177                                                 GWT.log("Path:"+p, throwable);\r
 178                                         }\r
 179                                 };\r
 180                                 DeferredCommand.addCommand(ga);\r
 181                         }\r
 182 \r
 183                         @Override\r
 184                         public void onError(Throwable t) {\r
 185 \r
 186                         }\r
 187                 };\r
 188                 DeferredCommand.addCommand(gg);\r
 189         }\r
 190 \r
 191         /**\r
 192          *  update status panel with currently showing file stats\r
 193          */\r
 194         public void updateCurrentlyShowingStats() {\r
 195                 GSS.get().getStatusPanel().updateCurrentlyShowing(null); //clear stats - nothing to show for the groups tab\r
 196         }\r
 197 \r
 198         /**\r
 199          * A helper method to simplify adding tree items that have attached images.\r
 200          * {@link #addImageItem(TreeItem, String) code}\r
 201          *\r
 202          * @param parent the tree item to which the new item will be added.\r
 203          * @param title the text associated with this item.\r
 204          * @param imageProto\r
 205          * @return the new tree item\r
 206          */\r
 207         private TreeItem addImageItem(final TreeItem parent, final String title, final AbstractImagePrototype imageProto) {\r
 208                 final TreeItem item = new TreeItem(imageItemHTML(imageProto, title));\r
 209                 parent.addItem(item);\r
 210                 return item;\r
 211         }\r
 212 \r
 213         /**\r
 214          * Generates HTML for a tree item with an attached icon.\r
 215          *\r
 216          * @param imageProto the icon image\r
 217          * @param title the title of the item\r
 218          * @return the resultant HTML\r
 219          */\r
 220         private HTML imageItemHTML(final AbstractImagePrototype imageProto, final String title) {\r
 221                 final HTML link = new HTML("<a class='hidden-link' href='javascript:;'>" + "<span>" + imageProto.getHTML() + "&nbsp;" + title + "</span>" + "</a>");\r
 222                 return link;\r
 223         }\r
 224 \r
 225         /*\r
 226          * (non-Javadoc)\r
 227          *\r
 228          * @see com.google.gwt.user.client.ui.TreeListener#onTreeItemSelected(com.google.gwt.user.client.ui.TreeItem)\r
 229          */\r
 230         public void onTreeItemSelected(final TreeItem item) {\r
 231                 final Object selected = item.getUserObject();\r
 232                 // Preserve the previously selected item, so that the current's\r
 233                 // onClick() method gets a chance to find it.\r
 234                 if (getPrevious() != null)\r
 235                         getPrevious().getWidget().removeStyleName("gss-SelectedRow");\r
 236                 setCurrent(item);\r
 237                 getCurrent().getWidget().addStyleName("gss-SelectedRow");\r
 238                 setPrevious(getCurrent());\r
 239                 GSS.get().setCurrentSelection(selected);\r
 240                 if (rightClicked) {\r
 241                         int left = item.getAbsoluteLeft() + 40;\r
 242                         int top = item.getAbsoluteTop() + 20;\r
 243                         showPopup(left, top);\r
 244                 }\r
 245         }\r
 246 \r
 247         protected void showPopup(final int x, final int y) {\r
 248                 if (getCurrent() == null)\r
 249                         return;\r
 250                 menu.hide();\r
 251                 menu = new GroupContextMenu(images);\r
 252                 menu.setPopupPosition(x, y);\r
 253                 menu.show();\r
 254         }\r
 255 \r
 256         /*\r
 257          * (non-Javadoc)\r
 258          *\r
 259          * @see com.google.gwt.user.client.ui.TreeListener#onTreeItemStateChanged(com.google.gwt.user.client.ui.TreeItem)\r
 260          */\r
 261         public void onTreeItemStateChanged(final TreeItem item) {\r
 262                 // Ignore closed items.\r
 263                 if (!item.getState())\r
 264                         return;\r
 265 \r
 266                 setChanged(item);\r
 267                 updateUsers( item);\r
 268         }\r
 269 \r
 270         /**\r
 271          * Generate an RPC request to retrieve the users of the specified group for\r
 272          * display.\r
 273          *\r
 274          * @param userId the ID of the current user\r
 275          * @param groupItem the TreeItem widget that corresponds to the requested\r
 276          *            group\r
 277          */\r
 278         void updateUsers(final TreeItem groupItem) {\r
 279                 if(groupItem.getUserObject() instanceof GroupResource){\r
 280                         GroupResource res = (GroupResource) groupItem.getUserObject();\r
 281                         MultipleGetCommand<GroupUserResource> gu = new MultipleGetCommand<GroupUserResource>(GroupUserResource.class, res.getUserPaths().toArray(new String[]{})){\r
 282                                 @Override\r
 283                                 public void onComplete() {\r
 284                                         List<GroupUserResource> users = getResult();\r
 285                                         groupItem.removeItems();\r
 286                                         for (int i = 0; i < users.size(); i++) {\r
 287                                                 final TreeItem userItem = addImageItem(groupItem, users.get(i).getName() + " &lt;" + users.get(i).getUsername() + "&gt;", images.permUser());\r
 288                                                 userItem.setUserObject(users.get(i));\r
 289                                         }\r
 290                                 }\r
 291 \r
 292                                 @Override\r
 293                                 public void onError(Throwable t) {\r
 294                                         GWT.log("", t);\r
 295                                 }\r
 296 \r
 297                                 @Override\r
 298                                 public void onError(String p, Throwable throwable) {\r
 299                                         GWT.log("Path:"+p, throwable);\r
 300                                 }\r
 301                         };\r
 302                         DeferredCommand.addCommand(gu);\r
 303                 }\r
 304 \r
 305         }\r
 306 \r
 307         /**\r
 308          * Retrieve the current.\r
 309          *\r
 310          * @return the current\r
 311          */\r
 312         TreeItem getCurrent() {\r
 313                 return current;\r
 314         }\r
 315 \r
 316         /**\r
 317          * Modify the current.\r
 318          *\r
 319          * @param newCurrent the current to set\r
 320          */\r
 321         void setCurrent(final TreeItem newCurrent) {\r
 322                 current = newCurrent;\r
 323         }\r
 324 \r
 325         /**\r
 326          * Modify the changed.\r
 327          *\r
 328          * @param newChanged the changed to set\r
 329          */\r
 330         private void setChanged(final TreeItem newChanged) {\r
 331                 changed = newChanged;\r
 332         }\r
 333 \r
 334         /**\r
 335          * Retrieve the previous.\r
 336          *\r
 337          * @return the previous\r
 338          */\r
 339         private TreeItem getPrevious() {\r
 340                 return previous;\r
 341         }\r
 342 \r
 343         /**\r
 344          * Modify the previous.\r
 345          *\r
 346          * @param newPrevious the previous to set\r
 347          */\r
 348         private void setPrevious(final TreeItem newPrevious) {\r
 349                 previous = newPrevious;\r
 350         }\r
 351 \r
 352         @Override\r
 353         public void setVisible(final boolean visible) {\r
 354                 super.setVisible(visible);\r
 355                 if (visible)\r
 356                         updateGroups();\r
 357         }\r
 358 }\r