added comment

kicad/treeprj_datas.cpp

@@ -260,6 +260,7 @@ bool TreePrjItemData::Rename( const wxString& name, bool check )
     //this is broken & unsafe to use on linux.
     if( m_Type == TREE_DIRECTORY )
         return false;
+    
     if( name.IsEmpty() )
         return false;
 
@@ -282,8 +283,7 @@ bool TreePrjItemData::Rename( const wxString& name, bool check )
     if( check && !ext.IsEmpty() && !reg.Matches( newFile ) )
     {
         wxMessageDialog dialog( m_Parent,
-                                           _(
-                                               "Changing file extension will change file type.\n Do you want to continue ?" ),
+          _( "Changing file extension will change file type.\n Do you want to continue ?" ),
           _( "Rename File" ),
           wxYES_NO | wxICON_QUESTION );
 
@@ -291,23 +291,23 @@ bool TreePrjItemData::Rename( const wxString& name, bool check )
             return false;
     }
 
-#if ( (wxMAJOR_VERSION < 2) || ( (wxMAJOR_VERSION == 2) && (wxMINOR_VERSION < 7) ) )
+#if ( ( wxMAJOR_VERSION < 2) || ( ( wxMAJOR_VERSION == 2) && (wxMINOR_VERSION < 7 )  ) )
     if( !wxRenameFile( m_FileName, newFile ) )
 #else
     if( !wxRenameFile( m_FileName, newFile, false ) )
 #endif
     {
         wxMessageDialog( m_Parent, _( "Unable to rename file ... " ),
-                        _("Permission error ?" ), wxICON_ERROR | wxOK );
+                         _( "Permission error ?" ), wxICON_ERROR | wxOK );
         return false;
     }
     SetFileName( newFile );
 
-    #ifdef KICAD_PYTHON
+#ifdef KICAD_PYTHON
     object param = make_tuple( PyHandler::Convert( m_FileName ),
                               PyHandler::Convert( newFile ) );
     PyHandler::GetInstance()->TriggerEvent( wxT( "kicad::RenameFile" ), param );
-    #endif
+#endif
     return true;
 }
 
@@ -318,7 +318,7 @@ bool TreePrjItemData::Delete( bool check )
 /* delete a file */
 {
     wxMessageDialog dialog( m_Parent, _ ("Do you really want to delete ") + GetFileName(),
-                           _("Delete File" ), wxYES_NO | wxICON_QUESTION );
+                            _( "Delete File" ), wxYES_NO | wxICON_QUESTION );
 
     if( !check || wxID_YES == dialog.ShowModal() )
     {
@@ -350,13 +350,13 @@ bool TreePrjItemData::Delete( bool check )
 
 
 /**********************************/
-void TreePrjItemData::Activate(WinEDA_PrjFrame* prjframe)
+void TreePrjItemData::Activate( WinEDA_PrjFrame* prjframe )
 /**********************************/
 /* Called under item activation */
 {
     wxString     sep = wxFileName().GetPathSeparator();
     wxString     FullFileName = GetFileName();
-	wxDir 		*dir; 
+    wxDir*       dir;
     wxString     dir_filename;
     wxTreeItemId id = GetId();
     int          count;
@@ -367,8 +367,10 @@ void TreePrjItemData::Activate(WinEDA_PrjFrame* prjframe)
         break;
 
     case TREE_DIRECTORY:
-		if(prjframe){
-			dir = new wxDir(FullFileName); 
+        if( prjframe )
+        {
+            dir = new wxDir( FullFileName );
+
             count = 0;
             if( dir && dir->IsOpened() && dir->GetFirst( &dir_filename ) )
             {
@@ -376,39 +378,44 @@ void TreePrjItemData::Activate(WinEDA_PrjFrame* prjframe)
                 {
                     wxString fil = FullFileName + sep + dir_filename;
 
-					if( prjframe->AddFile(fil, id) ){
+                    if( prjframe->AddFile( fil, id ) )
+                    {
                         count++;
                     }
                 } while( dir->GetNext( &dir_filename ) );
             }
-			if(count == 0)
+            
+            if( count == 0 )
             {
-				prjframe->AddFile(wxString(_("no kicad files found in this directory")), id); 
+                /*  The AddFile() text below should match the filter added to handle
+                    it in treeprj_frame.cpp in the line looking like this:
+                    m_Filters.push_back( wxT( "^no kicad files found" ) );
+                */
+				prjframe->AddFile( wxString(_("no kicad files found in this directory")), id ); 
             }
+            
             /* Sort filenames by alphabetic order */
             m_Parent->SortChildren( id );
-			if(dir) delete dir; 
+            delete dir;
         }
         m_Parent->Toggle( id );
         break;
 
     case TREE_SCHEMA:
-    {
         AddDelimiterString( FullFileName );
         ExecuteFile( m_Parent, EESCHEMA_EXE, FullFileName );
         break;
-    }
 
     case TREE_PCB:
         AddDelimiterString( FullFileName );
         ExecuteFile( m_Parent, PCBNEW_EXE, FullFileName );
         break;
 
-        #ifdef KICAD_PYTHON
+#ifdef KICAD_PYTHON
     case TREE_PY:
         PyHandler::GetInstance()->RunScript( FullFileName );
         break;
-        #endif
+#endif
 
     case TREE_GERBER:
         AddDelimiterString( FullFileName );