many wxItemContainer-related changes:

1. the main function for item insertion is now DoInsertItems() which allows
   for much more efficient addition of many new items at once
2. the items client data management is done entirely in wxItemContainer
   itself, the derived classes don't have to distinguish between void and
   object client data
3. many fixes for sorted controls, in particular implemented wxCB_SORT support
   in wxGTK combobox


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47730 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/listbox.h

@@ -103,8 +103,8 @@ public:
     //
     // Implement base class pure virtuals
     //
-    virtual void          Clear(void);
-    virtual void          Delete(unsigned int n);
+    virtual void          DoClear(void);
+    virtual void          DoDeleteOneItem(unsigned int n);
 
     virtual unsigned int  GetCount() const;
     virtual wxString      GetString(unsigned int n) const;
@@ -115,18 +115,10 @@ public:
     virtual int           GetSelection(void) const;
     virtual int           GetSelections(wxArrayInt& raSelections) const;
 
-    virtual int           DoAppend(const wxString& rsItem);
-    virtual void          DoInsertItems( const wxArrayString& raItems, unsigned int rPos );
-    virtual void          DoSetItems( const wxArrayString& raItems
-                                     ,void **              ppClientData
-                                    );
-
     virtual void          DoSetFirstItem(int n);
 
     virtual void          DoSetItemClientData(unsigned int n, void* pClientData);
     virtual void*         DoGetItemClientData(unsigned int n) const;
-    virtual void          DoSetItemClientObject(unsigned int n, wxClientData* pClientData);
-    virtual wxClientData* DoGetItemClientObject(unsigned int n) const;
 
     //
     // wxCheckListBox support
@@ -160,7 +152,14 @@ protected:
     wxListBoxItemsArray             m_aItems;
 #endif
 
-private:
+    //
+    // Implement base wxItemContainer virtuals
+    //
+    virtual int           DoInsertItems(const wxArrayStringsAdapter& items,
+                                        unsigned int pos,
+                                        void **clientData,
+                                        wxClientDataType type);
+
     DECLARE_DYNAMIC_CLASS(wxListBox)
 }; // end of wxListBox