Add wxFontRefData ctor from wxFontInfo to wxQt

This actually implements support for the fractional font sizes, as
previously the fractional part was lost when passing by the legacy
Create() taking only integer size.

src/qt/font.cpp

@@ -105,6 +105,25 @@ class wxFontRefData: public wxGDIRefData
 public:
     wxFontRefData() {}
 
+    wxFontRefData(const wxFontInfo& info)
+    {
+        if ( info.HasFaceName() )
+            m_nativeFontInfo.SetFaceName(info.GetFaceName());
+        else
+            m_nativeFontInfo.SetFamily(info.GetFamily());
+
+        if ( info.IsUsingSizeInPixels() )
+            m_nativeFontInfo.SetPixelSize(info.GetPixelSize());
+        else
+            m_nativeFontInfo.SetFractionalPointSize(info.GetFractionalPointSize());
+
+        m_nativeFontInfo.SetStyle(info.GetStyle());
+        m_nativeFontInfo.SetWeight(info.GetWeight());
+        m_nativeFontInfo.SetUnderlined(info.IsUnderlined());
+        m_nativeFontInfo.SetStrikethrough(info.IsStrikethrough());
+
+    }
+
     wxFontRefData( const wxFontRefData& data )
     : wxGDIRefData()
     {
@@ -123,20 +142,7 @@ wxFont::wxFont()
 
 wxFont::wxFont(const wxFontInfo& info)
 {
-    m_refData = new wxFontRefData();
-    Create(wxSize(0, info.GetPointSize()),
-           info.GetFamily(),
-           info.GetStyle(),
-           info.GetWeight(),
-           info.IsUnderlined(),
-           info.GetFaceName(),
-           info.GetEncoding());
-
-    SetStrikethrough(info.IsStrikethrough());
-
-    wxSize pixelSize = info.GetPixelSize();
-    if ( pixelSize != wxDefaultSize )
-        SetPixelSize(pixelSize);
+    m_refData = new wxFontRefData(info);
 }
 
 wxFont::wxFont(const wxString& nativeFontInfoString)