Eeschema: add schematic sheet page number.

The groundwork has now been laid for per sheet instance data.  Initially
this only supports sheet page numbers but could be expanded to include
other per sheet instance information.

ADDED: Support for user defined schematic page numbers.

common/eda_draw_frame.cpp

@@ -89,7 +89,7 @@ EDA_DRAW_FRAME::EDA_DRAW_FRAME( KIWAY* aKiway, wxWindow* aParent, FRAME_T aFrame
     m_gridColor           = COLOR4D( DARKGRAY );   // Default grid color
     m_showPageLimits      = false;
     m_drawBgColor         = COLOR4D( BLACK );   // the background color of the draw canvas:
-                                                // BLACK for Pcbnew, BLACK or WHITE for eeschema
+                                                // BLACK for Pcbnew, BLACK or WHITE for Eeschema
     m_colorSettings       = nullptr;
     m_MsgFrameHeight      = EDA_MSG_PANEL::GetRequiredHeight();
     m_userUnits           = EDA_UNITS::MILLIMETRES;
@@ -819,19 +819,21 @@ static const wxString productName = wxT( "KiCad E.D.A.  " );
 
 void PrintPageLayout( RENDER_SETTINGS* aSettings, const PAGE_INFO& aPageInfo,
                       const wxString& aFullSheetName, const wxString& aFileName,
-                      const TITLE_BLOCK& aTitleBlock, int aSheetCount, int aSheetNumber,
-                      double aScalar, const PROJECT* aProject, const wxString& aSheetLayer )
+                      const TITLE_BLOCK& aTitleBlock, int aSheetCount, const wxString& aPageNumber,
+                      double aScalar, const PROJECT* aProject, const wxString& aSheetLayer,
+                      bool aIsFirstPage )
 {
     WS_DRAW_ITEM_LIST drawList;
 
     drawList.SetDefaultPenSize( aSettings->GetDefaultPenWidth() );
     drawList.SetMilsToIUfactor( aScalar );
-    drawList.SetSheetNumber( aSheetNumber );
+    drawList.SetPageNumber( aPageNumber );
     drawList.SetSheetCount( aSheetCount );
     drawList.SetFileName( aFileName );
     drawList.SetSheetName( aFullSheetName );
     drawList.SetSheetLayer( aSheetLayer );
     drawList.SetProject( aProject );
+    drawList.SetIsFirstPage( aIsFirstPage );
 
     drawList.BuildWorkSheetGraphicList( aPageInfo, aTitleBlock );
 
@@ -857,8 +859,8 @@ void EDA_DRAW_FRAME::PrintWorkSheet( RENDER_SETTINGS* aSettings, BASE_SCREEN* aS
     }
 
     PrintPageLayout( aSettings, GetPageSettings(), GetScreenDesc(), aFilename, GetTitleBlock(),
-                     aScreen->m_NumberOfScreens, aScreen->m_ScreenNumber, aScalar, &Prj(),
-                     aSheetLayer );
+                     aScreen->GetPageCount(), aScreen->GetPageNumber(), aScalar, &Prj(),
+                     aSheetLayer, aScreen->GetVirtualPageNumber() == 1 );
 
     if( origin.y > 0 )
     {
@@ -874,6 +876,7 @@ wxString EDA_DRAW_FRAME::GetScreenDesc() const
     return wxEmptyString;
 }
 
+
 bool EDA_DRAW_FRAME::LibraryFileBrowser( bool doOpen, wxFileName& aFilename,
                                          const wxString& wildcard, const wxString& ext,
                                          bool isDirectory )