Add a REPAINT flag for faster redraw when bounding box hasn't changed

common/view/view.cpp

@@ -1092,7 +1092,7 @@ void VIEW::invalidateItem( VIEW_ITEM* aItem, int aUpdateFlags )
 
         if( IsCached( layerId ) )
         {
-            if( aUpdateFlags & ( GEOMETRY | LAYERS ) )
+            if( aUpdateFlags & ( GEOMETRY | LAYERS | REPAINT ) )
                 updateItemGeometry( aItem, layerId );
             else if( aUpdateFlags & COLOR )
                 updateItemColor( aItem, layerId );

gerbview/events_called_functions.cpp

@@ -533,7 +533,7 @@ void GERBVIEW_FRAME::OnSelectOptionToolbar( wxCommandEvent& event )
         auto view = GetGalCanvas()->GetView();
 
         if( needs_repaint )
-            view->UpdateAllItems( KIGFX::GEOMETRY );
+            view->UpdateAllItems( KIGFX::REPAINT );
         else
             view->UpdateAllItems( KIGFX::COLOR );
 

include/view/view_item.h

@@ -57,6 +57,7 @@ enum VIEW_UPDATE_FLAGS {
     GEOMETRY    = 0x04,     /// Position or shape has changed
     LAYERS      = 0x08,     /// Layers have changed
     INITIAL_ADD = 0x10,     /// Item is being added to the view
+    REPAINT     = 0x20,     /// Item needs to be redrawn
     ALL         = 0xef      /// All except INITIAL_ADD
 };