Add wxDataViewListCtrl::{Set,Get}ItemData() methods.

These methods are convenient when migrating the code that previously used
wxListCtrl to wxDataViewCtrl.

Closes #11088.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71562 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dataview.h

@@ -972,6 +972,9 @@ public:
     void DeleteItem( unsigned int pos );
     void DeleteAllItems();
 
+    void SetItemData( const wxDataViewItem& item, wxUIntPtr data );
+    wxUIntPtr GetItemData( const wxDataViewItem& item ) const;
+
     // override base virtuals
 
     virtual unsigned int GetColumnCount() const;
@@ -1077,6 +1080,11 @@ public:
     bool GetToggleValue( unsigned int row, unsigned int col ) const
         { wxVariant value; GetStore()->GetValueByRow( value, row, col ); return value.GetBool(); }
 
+    void SetItemData( const wxDataViewItem& item, wxUIntPtr data )
+        { GetStore()->SetItemData( item, data ); }
+    wxUIntPtr GetItemData( const wxDataViewItem& item ) const
+        { return GetStore()->GetItemData( item ); }
+
     void OnSize( wxSizeEvent &event );
 
 private: