Add RepoTreeView class

Just header class, its intention is to make known that the current selection
of has changed. This is usefull to display the correct metainformation of
the entries.

re #6177

Code/Mantid/MantidQt/API/CMakeLists.txt

@@ -41,6 +41,7 @@ set ( MOC_FILES
   inc/MantidQtAPI/PropertyWidget.h
   inc/MantidQtAPI/PythonRunner.h
   inc/MantidQtAPI/ScriptRepositoryView.h
+  inc/MantidQtAPI/RepoTreeView.h
   inc/MantidQtAPI/RepoModel.h
   inc/MantidQtAPI/SyncedCheckboxes.h
   inc/MantidQtAPI/TextPropertyWidget.h

Code/Mantid/MantidQt/API/inc/MantidQtAPI/RepoTreeView.h

@@ -0,0 +1,60 @@
+#ifndef MANTID_API_REPOTREEVIEW_H_
+#define MANTID_API_REPOTREEVIEW_H_
+
+#include "DllOption.h"
+#include <QTreeView>
+
+namespace MantidQt
+{
+namespace API
+{
+  /** RepoTreeView : A specialization of QTreeView class that emits signal every time
+      the selection change. It extends the currentChanged method in order to add the 
+      emition of the signal currentCell.
+    
+    Copyright &copy; 2013 ISIS Rutherford Appleton Laboratory & NScD Oak Ridge National Laboratory
+
+    This file is part of Mantid.
+
+    Mantid is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    Mantid is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+    File change history is stored at: <https://github.com/mantidproject/mantid>
+    Code Documentation is available at: <http://doxygen.mantidproject.org>
+  */
+  class  EXPORT_OPT_MANTIDQT_API RepoTreeView : public QTreeView
+  {
+    Q_OBJECT
+
+   public:
+    // constuctor 
+    RepoTreeView(QWidget * parent=0):QTreeView(parent){};
+    // destructor - not virtual, because this is not intended to be base
+    virtual ~RepoTreeView(){};
+
+  signals:
+    void currentCell(const QModelIndex& ); 
+
+  protected slots:
+
+    void 	currentChanged ( const QModelIndex & current, const QModelIndex & previous ){
+      QTreeView::currentChanged(current,previous); 
+      emit currentCell(current);
+    };
+  };
+
+
+} // namespace API
+} // namespace Mantid
+
+#endif  /* MANTID_API_REPOTREEVIEW_H_ */