Virtualize StartEditor and add implementations for the ports that can do it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67817 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/carbon/dataview.h

@@ -427,6 +427,8 @@ public:
   virtual void SetRowHeight(wxDataViewItem const& item, unsigned int height);
   virtual void OnSize      ();
 
+  virtual void StartEditor( const wxDataViewItem & item, unsigned int column );
+
  //
  // other methods
  //

include/wx/osx/cocoa/dataview.h

@@ -496,6 +496,8 @@ public:
                          wxDataViewColumn*& columnPtr) const;
     virtual void SetRowHeight(const wxDataViewItem& item, unsigned int height);
     virtual void OnSize();
+    
+    virtual void StartEditor( const wxDataViewItem & item, unsigned int column );
 
     // drag & drop helper methods
     wxDataFormat GetDnDDataFormat(wxDataObjectComposite* dataObjects);

include/wx/osx/core/dataview.h

@@ -109,6 +109,7 @@ public:
   virtual void HitTest     (wxPoint const& point, wxDataViewItem& item, wxDataViewColumn*& columnPtr) const = 0; // return the item and column pointer that contains with the passed point
   virtual void SetRowHeight(wxDataViewItem const& item, unsigned int height)                                = 0; // sets the height of the row containg the passed item in the native control
   virtual void OnSize      (void)                                                                           = 0; // updates the layout of the native control after a size event
+  virtual void StartEditor( const wxDataViewItem & item, unsigned int column )                              = 0; // starts editing the passed in item and column
 };
 
 #endif // _WX_DATAVIEWCTRL_CORE_H_

include/wx/osx/dataview.h

@@ -201,6 +201,8 @@ public:
 
  // finishes editing of custom items; if no custom item is currently edited the method does nothing
   void FinishCustomItemEditing();
+  
+  virtual void StartEditor( const wxDataViewItem & item, unsigned int column );
 
  // returns the n-th pointer to a column;
  // this method is different from GetColumn(unsigned int pos) because here 'n' is not a position in the control but the n-th