class BOARD: rename m_Zone to m_SegZoneDeprecated to avoid mistakes in code.

m_Zone is a fully deprecated list of SEG_ZONE items (similar to TRACK), used to fill copper zones in *very old* boards.
it is even unlikely there are still boards that use them.
So it should be removed one day.

pcbnew/class_board.cpp

@@ -872,9 +872,9 @@ void BOARD::Add( BOARD_ITEM* aBoardItem, ADD_MODE aMode )
 
     case PCB_ZONE_T:
         if( aMode == ADD_APPEND )
-            m_Zone.PushBack( (SEGZONE*) aBoardItem );
+            m_SegZoneDeprecated.PushBack( (SEGZONE*) aBoardItem );
         else
-            m_Zone.PushFront( (SEGZONE*) aBoardItem );
+            m_SegZoneDeprecated.PushFront( (SEGZONE*) aBoardItem );
 
         break;
 
@@ -967,7 +967,7 @@ void BOARD::Remove( BOARD_ITEM* aBoardItem )
         break;
 
     case PCB_ZONE_T:
-        m_Zone.Remove( (SEGZONE*) aBoardItem );
+        m_SegZoneDeprecated.Remove( (SEGZONE*) aBoardItem );
         break;
 
     case PCB_DIMENSION_T:
@@ -1015,7 +1015,7 @@ int BOARD::GetNumSegmTrack() const
 
 int BOARD::GetNumSegmZone() const
 {
-    return m_Zone.GetCount();
+    return m_SegZoneDeprecated.GetCount();
 }
 
 
@@ -1075,7 +1075,7 @@ EDA_RECT BOARD::ComputeBoundingBox( bool aBoardEdgesOnly ) const
         }
 
         // Check segment zones
-        for( TRACK* track = m_Zone; track; track = track->Next() )
+        for( TRACK* track = m_SegZoneDeprecated; track; track = track->Next() )
         {
             if( !hasItems )
                 area = track->GetBoundingBox();
@@ -1303,7 +1303,7 @@ SEARCH_RESULT BOARD::Visit( INSPECTOR inspector, void* testData, const KICAD_T s
             break;
 
         case PCB_ZONE_T:
-            result = IterateForward( m_Zone, inspector, testData, p );
+            result = IterateForward( m_SegZoneDeprecated, inspector, testData, p );
             ++p;
             break;
 

pcbnew/class_board.h

@@ -244,7 +244,8 @@ public:
 
     DLIST<MODULE>               m_Modules;              // linked list of MODULEs
     DLIST<TRACK>                m_Track;                // linked list of TRACKs and VIAs
-    DLIST<SEGZONE>              m_Zone;                  // linked list of SEGZONEs
+    DLIST<SEGZONE>              m_SegZoneDeprecated;    // linked list of SEGZONEs, for really very old boards
+                                                        // should be removed one day
 
     DLIST_ITERATOR_WRAPPER<TRACK> Tracks() { return DLIST_ITERATOR_WRAPPER<TRACK>(m_Track); }
     DLIST_ITERATOR_WRAPPER<MODULE> Modules() { return DLIST_ITERATOR_WRAPPER<MODULE>(m_Modules); }
@@ -268,7 +269,7 @@ public:
     bool IsEmpty() const
     {
         return m_Drawings.GetCount() == 0 && m_Modules.GetCount() == 0 &&
-               m_Track.GetCount() == 0 && m_Zone.GetCount() == 0;
+               m_Track.GetCount() == 0 && m_SegZoneDeprecated.GetCount() == 0;
     }
 
     void Move( const wxPoint& aMoveVector ) override;

pcbnew/class_track.cpp

@@ -501,8 +501,8 @@ TRACK* TRACK::GetBestInsertPoint( BOARD* aPcb )
     // When reading from a file most of the items will already be in the correct order.
     // Searching from the back therefore takes us from n^2 to essentially 0.
 
-    if( Type() == PCB_ZONE_T )
+    if( Type() == PCB_ZONE_T )  // Deprecated items, only found in very old boards
-        track = aPcb->m_Zone.GetLast();
+        track = aPcb->m_SegZoneDeprecated.GetLast();
     else
         track = aPcb->m_Track.GetLast();
 
@@ -512,8 +512,8 @@ TRACK* TRACK::GetBestInsertPoint( BOARD* aPcb )
             return track->Next();
     }
 
-    if( Type() == PCB_ZONE_T )
+    if( Type() == PCB_ZONE_T )  // Deprecated
-        return aPcb->m_Zone.GetFirst();
+        return aPcb->m_SegZoneDeprecated.GetFirst();
     else
         return aPcb->m_Track.GetFirst();
 }

pcbnew/edit.cpp

@@ -662,7 +662,8 @@ void PCB_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
         break;
 
     case ID_POPUP_PCB_REMOVE_FILLED_AREAS_IN_ALL_ZONES: // Remove all zones :
-        GetBoard()->m_Zone.DeleteAll();                 // remove zone segments used to fill zones.
+        GetBoard()->m_SegZoneDeprecated.DeleteAll();    // remove deprecated zone segments used
+                                                        // to fill zones in very old boards.
 
         for( int ii = 0; ii < GetBoard()->GetAreaCount(); ii++ )
         {

pcbnew/exporters/export_gencad.cpp

@@ -1064,12 +1064,6 @@ static void CreateRoutesSection( FILE* aFile, BOARD* aPcb )
     for( track = aPcb->m_Track; track; track = track->Next() )
         nbitems++;
 
-    for( track = aPcb->m_Zone; track; track = track->Next() )
-    {
-        if( track->Type() == PCB_ZONE_T )
-            nbitems++;
-    }
-
     tracklist = (TRACK**) operator new( (nbitems + 1)* sizeof( TRACK* ) );
 
     nbitems = 0;
@@ -1077,12 +1071,6 @@ static void CreateRoutesSection( FILE* aFile, BOARD* aPcb )
     for( track = aPcb->m_Track; track; track = track->Next() )
         tracklist[nbitems++] = track;
 
-    for( track = aPcb->m_Zone; track; track = track->Next() )
-    {
-        if( track->Type() == PCB_ZONE_T )
-            tracklist[nbitems++] = track;
-    }
-
     tracklist[nbitems] = NULL;
 
     qsort( tracklist, nbitems, sizeof(TRACK*), TrackListSortByNetcode );
@@ -1255,23 +1243,6 @@ static void CreateTracksInfoData( FILE* aFile, BOARD* aPcb )
         }
     }
 
-    for( track = aPcb->m_Zone; track; track = track->Next() )
-    {
-        if( last_width != track->GetWidth() ) // Find a thickness already used.
-        {
-            for( ii = 0; ii < trackinfo.size(); ii++ )
-            {
-                if( trackinfo[ii] == track->GetWidth() )
-                    break;
-            }
-
-            if( ii == trackinfo.size() )    // not found
-                trackinfo.push_back( track->GetWidth() );
-
-            last_width = track->GetWidth();
-        }
-    }
-
     // Write data
     fputs( "$TRACKS\n", aFile );
 

pcbnew/netinfo_list.cpp

@@ -227,8 +227,8 @@ void NETINFO_MAPPING::Update()
         }
     }
 
-    // Segzones
+    // Segzones (should be removed: used only in very old boards)
-    for( SEGZONE* zone = m_board->m_Zone; zone; zone = zone->Next() )
+    for( SEGZONE* zone = m_board->m_SegZoneDeprecated; zone; zone = zone->Next() )
         nets.insert( zone->GetNetCode() );
 
     // Prepare the new mapping

pcbnew/pcb_draw_panel_gal.cpp

@@ -160,8 +160,8 @@ void PCB_DRAW_PANEL_GAL::DisplayBoard( BOARD* aBoard )
     for( MODULE* module = aBoard->m_Modules; module; module = module->Next() )
         m_view->Add( module );
 
-    // Segzones (equivalent of ZONE_CONTAINER for legacy boards)
+    // Segzones (deprecated, equivalent of ZONE_CONTAINERfilled areas for very old boards)
-    for( SEGZONE* zone = aBoard->m_Zone; zone; zone = zone->Next() )
+    for( SEGZONE* zone = aBoard->m_SegZoneDeprecated; zone; zone = zone->Next() )
         m_view->Add( zone );
 
     // DRC markers

pcbnew/pcb_legacy_draw_utils.cpp

@@ -157,9 +157,9 @@ void BOARD::Draw( EDA_DRAW_PANEL* aPanel, wxDC* DC, GR_DRAWMODE aDrawMode, const
         track->Draw( aPanel, DC, aDrawMode );
     }
 
-    // SEGZONE is outdated, only her for compatibility with
+    // SEGZONE is deprecated, only for compatibility with
     // very old designs
-    for( SEGZONE* zone = m_Zone; zone; zone = zone->Next() )
+    for( SEGZONE* zone = m_SegZoneDeprecated; zone; zone = zone->Next() )
     {
         if( zone->IsMoving() )
             continue;

pcbnew/plot_board_layers.cpp

@@ -139,9 +139,9 @@ void PlotSilkScreen( BOARD *aBoard, PLOTTER* aPlotter, LSET aLayerMask,
 
     aPlotter->EndBlock( NULL );
 
-    // Plot segments used to fill zone areas (outdated, but here for old boards
+    // Plot segments used to fill zone areas (deprecated, but here for very old boards
     // compatibility):
-    for( SEGZONE* seg = aBoard->m_Zone; seg; seg = seg->Next() )
+    for( SEGZONE* seg = aBoard->m_SegZoneDeprecated; seg; seg = seg->Next() )
     {
         if( !aLayerMask[ seg->GetLayer() ] )
             continue;
@@ -545,8 +545,8 @@ void PlotStandardLayer( BOARD *aBoard, PLOTTER* aPlotter,
 
     aPlotter->EndBlock( NULL );
 
-    // Plot zones (outdated, for old boards compatibility):
+    // Plot zones (deprecated, for very old boards compatibility):
-    for( TRACK* track = aBoard->m_Zone; track; track = track->Next() )
+    for( TRACK* track = aBoard->m_SegZoneDeprecated; track; track = track->Next() )
     {
         if( !aLayerMask[track->GetLayer()] )
             continue;

pcbnew/print_board_functions.cpp

@@ -213,8 +213,8 @@ void PCB_EDIT_FRAME::PrintPage( wxDC* aDC,
         }
     }
 
-    // Outdated: only for compatibility to old boards
+    // Deprecated: only for compatibility with very old boards
-    for( TRACK* track = Pcb->m_Zone; track; track = track->Next() )
+    for( TRACK* track = Pcb->m_SegZoneDeprecated; track; track = track->Next() )
     {
         if( !( aPrintMask & track->GetLayerSet() ).any() )
             continue;

pcbnew/swap_layers.cpp

@@ -406,8 +406,8 @@ void PCB_EDIT_FRAME::Swap_Layers( wxCommandEvent& event )
         }
     }
 
-    // Change zones.
+    // Change deprecated zones segments, only found in very old boards.
-    for( TRACK* segm = GetBoard()->m_Zone; segm; segm = segm->Next() )
+    for( TRACK* segm = GetBoard()->m_SegZoneDeprecated; segm; segm = segm->Next() )
     {
         OnModify();
         int jj = segm->GetLayer();

pcbnew/undo_redo.cpp

@@ -152,8 +152,8 @@ static bool TestForExistingItem( BOARD* aPcb, BOARD_ITEM* aItem )
         for( int ii = 0; ii < aPcb->GetAreaCount(); ii++ )
             itemsList.push_back( aPcb->GetArea( ii ) );
 
-        // Append zones segm:
+        // Append zones segm (deprecated items):
-        for( item = aPcb->m_Zone; item != NULL; item = item->Next() )
+        for( item = aPcb->m_SegZoneDeprecated; item != NULL; item = item->Next() )
             itemsList.push_back( item );
 
         NETINFO_LIST& netInfo = aPcb->GetNetInfo();

pcbnew/zone_filler.cpp

@@ -206,8 +206,8 @@ bool ZONE_FILLER::Fill( std::vector<ZONE_CONTAINER*> aZones, bool aCheck )
         }
     }
 
-    // Remove segment zones
+    // Remove deprecaded segment zones (only found in very old boards)
-    m_board->m_Zone.DeleteAll();
+    m_board->m_SegZoneDeprecated.DeleteAll();
 
     if( m_progressReporter )
     {

pcbnew/zones_by_polygon_fill_functions.cpp

@@ -72,9 +72,10 @@ void PCB_EDIT_FRAME::Delete_OldZone_Fill( SEGZONE* aZone, timestamp_t aTimestamp
     else
         TimeStamp = aZone->GetTimeStamp(); // Save reference time stamp (aZone will be deleted)
 
+    // SEGZONE is a deprecated item, only used for compatibility with very old boards
     SEGZONE* next;
 
-    for( SEGZONE* zone = GetBoard()->m_Zone; zone != NULL; zone = next )
+    for( SEGZONE* zone = GetBoard()->m_SegZoneDeprecated; zone != NULL; zone = next )
     {
         next = zone->Next();