--- /dev/null
+package org.argeo.cms.e4.users.providers;
+
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.swt.dnd.DragSourceEvent;
+import org.eclipse.swt.dnd.DragSourceListener;
+import org.osgi.service.useradmin.User;
+
+/** Default drag listener to modify group and users via the UI */
+public class UserDragListener implements DragSourceListener {
+ private static final long serialVersionUID = -2074337775033781454L;
+ private final Viewer viewer;
+
+ public UserDragListener(Viewer viewer) {
+ this.viewer = viewer;
+ }
+
+ public void dragStart(DragSourceEvent event) {
+ // TODO implement finer checks
+ IStructuredSelection selection = (IStructuredSelection) viewer
+ .getSelection();
+ if (selection.isEmpty() || selection.size() > 1)
+ event.doit = false;
+ else
+ event.doit = true;
+ }
+
+ public void dragSetData(DragSourceEvent event) {
+ // TODO Support multiple selection
+ Object obj = ((IStructuredSelection) viewer.getSelection())
+ .getFirstElement();
+ if (obj != null) {
+ User user = (User) obj;
+ event.data = user.getName();
+ }
+ }
+
+ public void dragFinished(DragSourceEvent event) {
+ }
+}