Draw VIAs only if a layer they penetrate is visible.

pcbnew/class_pcb_layer_widget.cpp

@@ -413,6 +413,7 @@ void PCB_LAYER_WIDGET::OnLayerVisible( int aLayer, bool isVisible, bool isFinal
     {
         KIGFX::VIEW* view = galCanvas->GetView();
         view->SetLayerVisible( aLayer, isVisible );
+        view->RecacheAllItems( true );
     }
 
     if( isFinal )

pcbnew/class_track.cpp

@@ -393,17 +393,12 @@ LSET VIA::GetLayerSet() const
 
     // VIA_BLIND_BURIED or VIA_MICRVIA:
 
-    LAYER_ID bottom_layer, top_layer;
-
-    // LayerPair() knows how layers are stored
-    LayerPair( &top_layer, &bottom_layer );
-
     LSET layermask;
 
-    wxASSERT( top_layer <= bottom_layer );
+    wxASSERT( m_Layer <= m_BottomLayer );
 
     // LAYER_IDs are numbered from front to back, this is top to bottom.
-    for( LAYER_NUM id = top_layer;  id <= bottom_layer;  ++id )
+    for( LAYER_NUM id = m_Layer;  id <= m_BottomLayer;  ++id )
     {
         layermask.set( id );
     }
@@ -780,13 +775,17 @@ void VIA::Draw( EDA_DRAW_PANEL* panel, wxDC* aDC, GR_DRAWMODE aDrawMode,
 
     GRSetDrawMode( aDC, aDrawMode );
 
-    BOARD * brd =  GetBoard( );
-    EDA_COLOR_T color = brd->GetVisibleElementColor(VIAS_VISIBLE + GetViaType());
+    BOARD * brd =  GetBoard();
+    EDA_COLOR_T color = brd->GetVisibleElementColor( VIAS_VISIBLE + GetViaType() );
 
     if( brd->IsElementVisible( PCB_VISIBLE(VIAS_VISIBLE + GetViaType()) ) == false
         && ( color & HIGHLIGHT_FLAG ) != HIGHLIGHT_FLAG )
         return;
 
+    // Only draw the via if at least one of the layers it crosses is being displayed
+    if( !( brd->GetVisibleLayers() & GetLayerSet() ).any() )
+        return;
+
     if( DisplayOpt.ContrastModeDisplay )
     {
         if( !IsOnLayer( curr_layer ) )

pcbnew/pcb_painter.cpp

@@ -336,6 +336,11 @@ void PCB_PAINTER::draw( const VIA* aVia, int aLayer )
     VECTOR2D center( aVia->GetStart() );
     double   radius;
 
+    // Only draw the via if at least one of the layers it crosses is being displayed
+    BOARD*  brd =  aVia->GetBoard( );
+    if( !( brd->GetVisibleLayers() & aVia->GetLayerSet() ).any() )
+        return;
+
     // Choose drawing settings depending on if we are drawing via's pad or hole
     if( aLayer == ITEM_GAL_LAYER( VIA_THROUGH_VISIBLE ) )
     {