Merged the differential pair router & length tuning tool.

pcbnew/class_module.cpp

@@ -57,7 +57,7 @@ MODULE::MODULE( BOARD* parent ) :
     m_Attributs    = MOD_DEFAULT;
     m_Layer        = F_Cu;
     m_Orient       = 0;
-    m_ModuleStatus = 0;
+    m_ModuleStatus = MODULE_PADS_LOCKED;
     flag = 0;
     m_CntRot90 = m_CntRot180 = 0;
     m_Surface  = 0.0;
@@ -1241,3 +1241,20 @@ bool MODULE::IncrementReference( bool aFillSequenceGaps )
 
     return success;
 }
+
+
+double MODULE::PadCoverageRatio() const
+{
+    double padArea = 0.0;
+    double moduleArea = GetFootprintRect().GetArea();
+
+    for( D_PAD* pad = m_Pads; pad; pad = pad->Next() )
+        padArea += pad->GetBoundingBox().GetArea();
+
+    if( moduleArea == 0.0 )
+        return 1.0;
+
+    double ratio = padArea / moduleArea;
+
+    return std::min( ratio, 1.0 );
+}