- Rewrite wxHeaderCtrl to be virtual-like: even if we don't need an infinite

number of columns in it, it turns out that getting column information from
  the associated control is much easier than copying it into the control.
- Provide wxHeaderCtrlSimple derived class which can be used easily if
  callback approach of wxHeaderCtrl is not needed.
- Because of wxHeaderCtrl virtualization, port-specific implementations of
  wxHeaderColumn are not needed any more and were removed.
- Use wxHeaderCtrl in the generic wxDataViewCtrl: this means that column
  events are broken right now in it as they haven't been implemented by
  wxHeaderCtrl yet, this will be fixed a.s.a.p.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57161 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dataview.h

@@ -508,26 +508,25 @@ enum wxDataViewColumnFlags
     wxDATAVIEW_COL_HIDDEN        = wxCOL_HIDDEN
 };
 
-class WXDLLIMPEXP_ADV wxDataViewColumnBase : public
-// native implementations of wxDataViewCtrl have their own implementations of
-// wxDataViewColumnBase and so they need to only inherit from
-// wxHeaderColumnBase to provide the same interface as the generic port which
-// uses the platform native (if any) wxHeaderColumn
-#ifdef wxHAS_GENERIC_DATAVIEWCTRL
-                                             wxHeaderColumn
-#else
-                                             wxHeaderColumnBase
-#endif
+class WXDLLIMPEXP_ADV wxDataViewColumnBase : public wxHeaderColumnBase
 {
 public:
-    wxDataViewColumnBase( const wxString &title, wxDataViewRenderer *renderer,
-                          unsigned int model_column, int width = wxDVC_DEFAULT_WIDTH,
-                          wxAlignment align = wxALIGN_CENTER,
-                          int flags = wxDATAVIEW_COL_RESIZABLE );
-    wxDataViewColumnBase( const wxBitmap &bitmap, wxDataViewRenderer *renderer,
-                          unsigned int model_column, int width = wxDVC_DEFAULT_WIDTH,
-                          wxAlignment align = wxALIGN_CENTER,
-                          int flags = wxDATAVIEW_COL_RESIZABLE );
+    // ctor for the text columns: takes ownership of renderer
+    wxDataViewColumnBase(wxDataViewRenderer *renderer,
+                         unsigned int model_column)
+    {
+        Init(renderer, model_column);
+    }
+
+    // ctor for the bitmap columns
+    wxDataViewColumnBase(const wxBitmap& bitmap,
+                         wxDataViewRenderer *renderer,
+                         unsigned int model_column)
+        : m_bitmap(bitmap)
+    {
+        Init(renderer, model_column);
+    }
+
     virtual ~wxDataViewColumnBase();
 
     // setters:
@@ -539,23 +538,20 @@ public:
     wxDataViewCtrl *GetOwner() const        { return m_owner; }
     wxDataViewRenderer* GetRenderer() const { return m_renderer; }
 
-#ifndef wxHAS_GENERIC_DATAVIEWCTRL
     // implement some of base class pure virtuals (the rest is port-dependent
     // and done differently in generic and native versions)
     virtual void SetBitmap( const wxBitmap& bitmap ) { m_bitmap = bitmap; }
     virtual wxBitmap GetBitmap() const { return m_bitmap; }
-#endif // !wxHAS_GENERIC_DATAVIEWCTRL
 
 protected:
     wxDataViewRenderer      *m_renderer;
     int                      m_model_column;
-#ifndef wxHAS_GENERIC_DATAVIEWCTRL
     wxBitmap                 m_bitmap;
-#endif // !wxHAS_GENERIC_DATAVIEWCTRL
     wxDataViewCtrl          *m_owner;
 
-protected:
-    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewColumnBase)
+private:
+    // common part of all ctors
+    void Init(wxDataViewRenderer *renderer, unsigned int model_column);
 };
 
 // ---------------------------------------------------------