UserDragListener.java

   1 package org.argeo.cms.ui.workbench.internal.useradmin.providers;
   2
   3 import org.eclipse.jface.viewers.IStructuredSelection;
   4 import org.eclipse.jface.viewers.Viewer;
   5 import org.eclipse.swt.dnd.DragSourceEvent;
   6 import org.eclipse.swt.dnd.DragSourceListener;
   7 import org.osgi.service.useradmin.User;
   8
   9 /** Default drag listener to modify group and users via the UI */
  10 public class UserDragListener implements DragSourceListener {
  11         private static final long serialVersionUID = -2074337775033781454L;
  12         private final Viewer viewer;
  13
  14         public UserDragListener(Viewer viewer) {
  15                 this.viewer = viewer;
  16         }
  17
  18         public void dragStart(DragSourceEvent event) {
  19                 // TODO implement finer checks
  20                 IStructuredSelection selection = (IStructuredSelection) viewer
  21                                 .getSelection();
  22                 if (selection.isEmpty() || selection.size() > 1)
  23                         event.doit = false;
  24                 else
  25                         event.doit = true;
  26         }
  27
  28         public void dragSetData(DragSourceEvent event) {
  29                 // TODO Support multiple selection
  30                 Object obj = ((IStructuredSelection) viewer.getSelection())
  31                                 .getFirstElement();
  32                 if (obj != null) {
  33                         User user = (User) obj;
  34                         event.data = user.getName();
  35                 }
  36         }
  37
  38         public void dragFinished(DragSourceEvent event) {
  39         }
  40 }