From 30f19be5558b71d69309a3cc911c61354d2ba0f1 Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Mon, 8 Jul 2013 14:06:45 +0200
Subject: [PATCH] Fixed 'disappearing via' issue.

---
 pcbnew/class_track.cpp | 8 ++++++++
 pcbnew/class_track.h   | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/pcbnew/class_track.cpp b/pcbnew/class_track.cpp
index 784556c814..54ab04e58c 100644
--- a/pcbnew/class_track.cpp
+++ b/pcbnew/class_track.cpp
@@ -1001,6 +1001,14 @@ void SEGVIA::ViewGetLayers( int aLayers[], int& aCount ) const
 }
 
 
+void SEGVIA::ViewGetRequiredLayers( int aLayers[], int& aCount ) const
+{
+    // The only required layer is via itself, holes are optional
+    aLayers[0] = ITEM_GAL_LAYER( VIAS_VISIBLE );
+    aCount = 1;
+}
+
+
 // see class_track.h
 void TRACK::GetMsgPanelInfo( std::vector< MSG_PANEL_ITEM >& aList )
 {
diff --git a/pcbnew/class_track.h b/pcbnew/class_track.h
index 87ea39f3f0..bbacb4e3aa 100644
--- a/pcbnew/class_track.h
+++ b/pcbnew/class_track.h
@@ -424,6 +424,9 @@ public:
     /// @copydoc VIEW_ITEM::ViewGetLayers()
     virtual void ViewGetLayers( int aLayers[], int& aCount ) const;
 
+    /// @copydoc VIEW_ITEM::ViewGetRequiredLayers()
+    virtual void ViewGetRequiredLayers( int aLayers[], int& aCount ) const;
+
 #if defined (DEBUG)
     virtual void Show( int nestLevel, std::ostream& os ) const { ShowDummy( os ); }    // override
 #endif