+ // DRAG & DROP MANAGEMENT
+
+ private class ItemDropListener extends ViewerDropAdapter {
+ private static final long serialVersionUID = 2893468717831451621L;
+
+ private final UserAdmin myUserAdmin;
+ private final User myUser;
+
+ public ItemDropListener(Viewer viewer, UserAdmin userAdmin, User user) {
+ super(viewer);
+ this.myUserAdmin = userAdmin;
+ this.myUser = user;
+ }
+
+ @Override
+ public boolean validateDrop(Object target, int operation,
+ TransferData transferType) {
+ // Target is always OK in a list only view
+ // TODO check if not a string
+ boolean validDrop = true;
+ return validDrop;
+ }
+
+ @Override
+ public void drop(DropTargetEvent event) {
+ String name = (String) event.data;
+ Role role = myUserAdmin.getRole(name);
+ // TODO this check should be done before.
+ if (role.getType() == Role.GROUP) {
+ // TODO check if the user is already member of this group
+ // we expect here that there is already a begun transaction
+ // TODO implement the dirty state
+ Group group = (Group) role;
+ group.addMember(myUser);
+ }
+ super.drop(event);
+ }
+
+ @Override
+ public boolean performDrop(Object data) {
+ userTableViewerCmp.refresh();
+ return true;
+ }
+ }
+
+ // LOCAL HELPERS
+ /** Appends a section with a title */