- void AppendCol( wxDataViewColumn *column, const wxString &varianttype );
- void PrependCol( wxDataViewColumn *column, const wxString &varianttype );
- void InsertCol( unsigned int pos, wxDataViewColumn *column, const wxString &varianttype );
-
- wxDataViewColumn *AppendTextCol( const wxString &label,
+ bool AppendColumn( wxDataViewColumn *column, const wxString &varianttype );
+ bool PrependColumn( wxDataViewColumn *column, const wxString &varianttype );
+ bool InsertColumn( unsigned int pos, wxDataViewColumn *column, const wxString &varianttype );
+
+ // overridden from base class
+ virtual bool PrependColumn( wxDataViewColumn *col );
+ virtual bool InsertColumn( unsigned int pos, wxDataViewColumn *col );
+ virtual bool AppendColumn( wxDataViewColumn *col );
+
+ wxDataViewColumn *AppendTextColumn( const wxString &label,