Implement basic MVC logic (change an item in one

view and all views update themselves) and made
   wxDataViewToggleCell react to mouse clicks as a
   test for that (generic code).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38298 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dataview.h

@@ -219,7 +219,8 @@ public:
     virtual bool GetValue( wxVariant &value )       { return true; }
     virtual bool Validate( wxVariant &value )       { return true; }
     
-    wxString GetVariantType()   { return m_variantType; }
+    wxString GetVariantType()       { return m_variantType; }
+    wxDataViewCellMode GetMode()    { return m_mode; }
     
     void SetOwner( wxDataViewColumn *owner )    { m_owner = owner; }
     wxDataViewColumn* GetOwner()                { return m_owner; }