Adjust GAL world unit for eeschema

eeschema/sch_draw_panel.cpp

@@ -60,10 +60,6 @@ BEGIN_EVENT_TABLE( SCH_DRAW_PANEL, wxScrolledCanvas )
 //    EVT_MENU_RANGE( ID_PAN_UP, ID_PAN_RIGHT, EDA_DRAW_PANEL::OnPan )
 END_EVENT_TABLE()
 
-// define our user unit value for GAL ( given in GAL unit = 2.54/(IU per meter))
-// TODO: move in a header common to sch_preview_panel.cpp
-#define IU_2_GAL_WORLD_UNIT 2.54/(IU_PER_MM*1000)
-
 SCH_DRAW_PANEL::SCH_DRAW_PANEL( wxWindow* aParentWindow, wxWindowID aWindowId,
                                 const wxPoint& aPosition, const wxSize& aSize,
                                 KIGFX::GAL_DISPLAY_OPTIONS& aOptions, GAL_TYPE aGalType ) :
@@ -75,7 +71,7 @@ SCH_DRAW_PANEL::SCH_DRAW_PANEL( wxWindow* aParentWindow, wxWindowID aWindowId,
     m_view = new KIGFX::SCH_VIEW( true );
     m_view->SetGAL( m_gal );
 
-    m_gal->SetWorldUnitLength( IU_2_GAL_WORLD_UNIT );
+    m_gal->SetWorldUnitLength( SCH_WORLD_UNIT );
 
     m_painter.reset( new KIGFX::SCH_PAINTER( m_gal ) );
 
@@ -191,7 +187,7 @@ bool SCH_DRAW_PANEL::SwitchBackend( GAL_TYPE aGalType )
     VECTOR2D grid_size = m_gal->GetGridSize();
     bool rv = EDA_DRAW_PANEL_GAL::SwitchBackend( aGalType );
     setDefaultLayerDeps();
-    m_gal->SetWorldUnitLength( IU_2_GAL_WORLD_UNIT );
+    m_gal->SetWorldUnitLength( SCH_WORLD_UNIT );
 
     // Keep grid size and grid visibility:
     m_gal->SetGridSize( grid_size );

eeschema/sch_preview_panel.cpp

@@ -40,10 +40,6 @@
 
 using namespace std::placeholders;
 
-// define our user unit value for GAL ( given in GAL unit = 2.54/(IU per meter))
-// TODO: move in a header common to sch_draw_panel.cpp
-#define IU_2_GAL_WORLD_UNIT 2.54/(IU_PER_MM*1000)
-
 SCH_PREVIEW_PANEL::SCH_PREVIEW_PANEL( wxWindow* aParentWindow, wxWindowID aWindowId,
                                       const wxPoint& aPosition, const wxSize& aSize,
                                       KIGFX::GAL_DISPLAY_OPTIONS& aOptions, GAL_TYPE aGalType ) :
@@ -53,7 +49,7 @@ SCH_PREVIEW_PANEL::SCH_PREVIEW_PANEL( wxWindow* aParentWindow, wxWindowID aWindo
     m_view = new KIGFX::SCH_VIEW( true );
     m_view->SetGAL( m_gal );
 
-    m_gal->SetWorldUnitLength( IU_2_GAL_WORLD_UNIT );
+    m_gal->SetWorldUnitLength( SCH_WORLD_UNIT );
 
     m_painter.reset( new KIGFX::SCH_PAINTER( m_gal ) );
 

eeschema/sch_view.h

@@ -13,6 +13,8 @@ class SCH_SHEET;
 class SCH_SCREEN;
 class LIB_PART;
 
+// Eeschema uses mils as the internal units
+constexpr double SCH_WORLD_UNIT = 0.001;
 
 static const LAYER_NUM SCH_LAYER_ORDER[] =
     {