From 3f2fc340754c543d2f2d7391f840525caf5c89e1 Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Tue, 13 May 2014 11:22:51 +0200
Subject: [PATCH] WX_UNIT_TEXT can handle default value.

---
 common/wxunittext.cpp | 12 ++++++++++--
 include/wxunittext.h  |  3 +++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/common/wxunittext.cpp b/common/wxunittext.cpp
index f33be9ec5a..743f973dce 100644
--- a/common/wxunittext.cpp
+++ b/common/wxunittext.cpp
@@ -101,13 +101,15 @@ void WX_UNIT_TEXT::SetUnits( EDA_UNITS_T aUnits, bool aConvert )
 
 void WX_UNIT_TEXT::SetValue( double aValue )
 {
-    assert( aValue >= 0.0 );
-
     if( aValue >= 0.0 )
     {
         m_inputValue->SetValue( wxString( Double2Str( aValue ).c_str(), wxConvUTF8 ) );
         m_inputValue->MarkDirty();
     }
+    else
+    {
+        m_inputValue->SetValue( DEFAULT_VALUE );
+    }
 }
 
 
@@ -169,6 +171,9 @@ boost::optional<double> WX_UNIT_TEXT::GetValue() const
     wxString text = m_inputValue->GetValue();
     double value;
 
+    if( text == DEFAULT_VALUE )
+        return boost::optional<double>( -1.0 );
+
     if( !text.ToDouble( &value ) )
         return boost::optional<double>();
 
@@ -189,3 +194,6 @@ void WX_UNIT_TEXT::onSpinDownEvent( wxSpinEvent& aEvent )
     if( newValue >= 0.0 )
         SetValue( newValue );
 }
+
+
+const wxString WX_UNIT_TEXT::DEFAULT_VALUE = _( "default ");
diff --git a/include/wxunittext.h b/include/wxunittext.h
index 92791f09ff..54c52e14dc 100644
--- a/include/wxunittext.h
+++ b/include/wxunittext.h
@@ -136,6 +136,9 @@ protected:
 
     ///> Step size (added/subtracted difference if spin buttons are used).
     double          m_step;
+
+    ///> Default value (or non-specified)
+    static const wxString DEFAULT_VALUE;
 };
 
 #endif /* WXUNITTEXT_H_ */