Fix some more pen width issues from global removal.

Fixes https://gitlab.com/kicad/code/kicad/issues/4408

common/eda_text.cpp

@@ -159,10 +159,8 @@ int EDA_TEXT::GetEffectiveTextPenWidth( int aDefaultWidth ) const
 
         if( IsBold() )
             width = GetPenSizeForBold( GetTextWidth() );
-
-        // Avoid using a 0 width for text: it can create issues when drawing it
-        if( width <= 1 )
-            width = 1;
+        else if( width <= 1 )
+            width = GetPenSizeForNormal( GetTextWidth() );
     }
 
     // Clip pen size for small texts:

common/gr_text.cpp

@@ -54,6 +54,12 @@ int GetPenSizeForBold( int aTextSize )
 }
 
 
+int GetPenSizeForNormal( int aTextSize )
+{
+    return KiROUND( aTextSize / 8.0 );
+}
+
+
 /**
  * Function  Clamp_Text_PenSize
  * Don't allow text to become cluttered up in its own fatness.  Bold fonts are generally around

eeschema/sch_line.cpp

@@ -31,6 +31,7 @@
 #include <gr_basic.h>
 #include <macros.h>
 #include <sch_draw_panel.h>
+#include <sch_painter.h>
 #include <plotter.h>
 #include <base_units.h>
 #include <eeschema_config.h>
@@ -743,12 +744,22 @@ bool SCH_LINE::doIsConnected( const wxPoint& aPosition ) const
 
 void SCH_LINE::Plot( PLOTTER* aPlotter )
 {
+    auto* settings = static_cast<KIGFX::SCH_RENDER_SETTINGS*>( aPlotter->RenderSettings() );
+    int   penWidth;
+
     if( m_color != COLOR4D::UNSPECIFIED )
         aPlotter->SetColor( m_color );
     else
         aPlotter->SetColor( aPlotter->RenderSettings()->GetLayerColor( GetLayer() ) );
 
-    int penWidth = std::max( GetPenWidth(), aPlotter->RenderSettings()->GetDefaultPenWidth() );
+    switch( m_Layer )
+    {
+    case LAYER_WIRE: penWidth = settings->m_DefaultWireThickness; break;
+    case LAYER_BUS:  penWidth = settings->m_DefaultBusThickness;  break;
+    default:         penWidth = GetPenWidth();                    break;
+    }
+
+    penWidth = std::max( penWidth, aPlotter->RenderSettings()->GetDefaultPenWidth() );
 
     aPlotter->SetCurrentLineWidth( penWidth );
     aPlotter->SetDash( GetLineStyle() );

eeschema/sch_screen.cpp

@@ -823,19 +823,19 @@ void SCH_SCREEN::Plot( PLOTTER* aPlotter )
     // Bitmaps are drawn first to ensure they are in the background
     // This is particularly important for the wxPostscriptDC (used in *nix printers) as
     // the bitmap PS command clears the screen
-    for( auto item : bitmaps )
+    for( SCH_ITEM* item : bitmaps )
     {
         aPlotter->SetCurrentLineWidth( std::max( item->GetPenWidth(), defaultPenWidth ) );
         item->Plot( aPlotter );
     }
 
-    for( auto item : other )
+    for( SCH_ITEM* item : other )
     {
         aPlotter->SetCurrentLineWidth( std::max( item->GetPenWidth(), defaultPenWidth ) );
         item->Plot( aPlotter );
     }
 
-    for( auto item : junctions )
+    for( SCH_ITEM* item : junctions )
     {
         aPlotter->SetCurrentLineWidth( std::max( item->GetPenWidth(), defaultPenWidth ) );
         item->Plot( aPlotter );

include/gr_text.h

@@ -73,6 +73,13 @@ int Clamp_Text_PenSize( int aPenSize, wxSize aSize, bool aBold = true );
  */
 int GetPenSizeForBold( int aTextSize );
 
+/**
+ * Function GetPensizeForNormal
+ * @return the "best" value for a pen size to draw/plot a non-bold text
+ * @param aTextSize = the char size (height or width)
+ */
+int GetPenSizeForNormal( int aTextSize );
+
 /**
  * Function GraphicTextWidth
  * @return the X size of the graphic text