Refactor owner-drawing code.

Only keep common code in the base class and extract all menu/listbox-specific
stuff into derived classes.

This makes the code cleaner and more maintainable but introduces some problems
in wxCheckListBox appearance which will be fixed by the next patch.

Closes #10635.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63220 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/ownerdrw.h

@@ -0,0 +1,29 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/ownerdrw.h
+// Purpose:     wxOwnerDrawn class
+// Author:      Marcin Malich
+// Modified by:
+// Created:     2009-09-22
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Marcin Malich <me@malcom.pl>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_OWNERDRW_H_
+#define _WX_OWNERDRW_H_
+
+#if wxUSE_OWNER_DRAWN
+
+class WXDLLIMPEXP_CORE wxOwnerDrawn : public wxOwnerDrawnBase
+{
+public:
+    wxOwnerDrawn() {}
+    virtual ~wxOwnerDrawn() {}
+
+    virtual bool OnDrawItem(wxDC& dc, const wxRect& rc,
+                            wxODAction act, wxODStatus stat);
+};
+
+#endif // wxUSE_OWNER_DRAWN
+
+#endif // _WX_OWNERDRW_H_