refs #768, allow reselection of values when a view is sorted

* reselect callbacks
* remark: Only working in some cases as sorting is part of the model, while selection is part of the view (and sorting can take place without the view knowing the model is sorted)
* allow to sort by property index
* renamed to m_sortColumn

src/blackgui/views/viewdbobjects.h

@@ -27,7 +27,7 @@
 #include "blackmisc/simulation/distributor.h"
 #include "blackmisc/simulation/distributorlist.h"
 
-#include <QList>
+#include <QSet>
 #include <QObject>
 #include <QString>
 #include <QtGlobal>
@@ -40,7 +40,6 @@ class QWidget;
 namespace BlackGui
 {
     namespace Menus { class CMenuActions; }
-
     namespace Views
     {
         //! Base class for views with DB objects
@@ -54,11 +53,17 @@ namespace BlackGui
             //! Get oldets object
             ObjectType oldestObject() const;
 
+            //! Select given DB key
+            void selectDbKey(const KeyType &key);
+
             //! Select given DB keys
-            void selectDbKeys(const QList<KeyType> &keys);
+            void selectDbKeys(const QSet<KeyType> &keys);
+
+            //! Get selected DB keys
+            QSet<KeyType> selectedDbKeys() const;
 
             //! Remove keys
-            int removeDbKeys(const QList<KeyType> &keys);
+            int removeDbKeys(const QSet<KeyType> &keys);
 
             //! Update or insert data (based on DB key)
             int replaceOrAddObjectsByKey(const ContainerType &container);
@@ -82,6 +87,9 @@ namespace BlackGui
             //! \copydoc BlackGui::Views::CViewBaseNonTemplate::customMenu
             virtual void customMenu(BlackGui::Menus::CMenuActions &menuActions) override;
 
+            //! Reselect by DB keys
+            virtual void reselect(const ContainerType &selectedObjects) override;
+
             //! Move selected items
             void moveSelectedItems(int order);