/**
 * Reimplement this method to set a custom selection provider. This method is
 * called once after CreateQtPartControl().
 *
 * The default implementation registers a QmitkDataNodeSelectionProvider with
 * a QItemSelectionModel returned by GetDataNodeSelectionModel().
 */
virtual void SetSelectionProvider();

/**
 * Reimplement this method to supply a custom Qt selection model. The custom
 * model will be used with the default selection provider QmitkDataNodeSelectionProvider
 * to inform the MITK Workbench about selection changes.
 *
 * If you reimplement this method, the methods FireNodeSelected() and FireNodesSelected()
 * will have no effect. Use your custom selection model to notify the MITK Workbench
 * about selection changes.
 *
 * The Qt item model used with the custom selection model must return mitk::DataNode::Pointer
 * objects for model indexes when the role is QmitkDataNodeRole.
 */
virtual QItemSelectionModel* GetDataNodeSelectionModel() const;

/**
 * Called when the selection in the workbench changed.
 * May be reimplemented by deriving classes.
 *
 * \param part The source part responsible for the selection change.
 * \param nodes A list of selected nodes.
 *
 * \see OnNullSelection
 */
virtual void OnSelectionChanged(berry::IWorkbenchPart::Pointer part, const QList<mitk::DataNode::Pointer> &nodes);