Add XRC handlers for wxDataViewCtrl and related classes

The same handler is also used for wxDataViewListCtrl and
wxDataViewTreeCtrl.

Closes #18424.

include/wx/xrc/xh_dataview.h

@@ -0,0 +1,34 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/xrc/xh_dataview.h
+// Purpose:     XML resource handler for wxDataViewCtrl
+// Author:      Anton Triest
+// Created:     2019/06/27
+// Copyright:   (c) 2019 Anton Triest, Bricsys
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_XH_DATAVIEW_H_
+#define _WX_XH_DATAVIEW_H_
+
+#include "wx/xrc/xmlres.h"
+
+#if wxUSE_XRC && wxUSE_DATAVIEWCTRL
+
+class WXDLLIMPEXP_XRC wxDataViewXmlHandler : public wxXmlResourceHandler
+{
+    wxDECLARE_DYNAMIC_CLASS(wxDataViewXmlHandler);
+
+public:
+    wxDataViewXmlHandler();
+    virtual wxObject *DoCreateResource() wxOVERRIDE;
+    virtual bool CanHandle(wxXmlNode *node) wxOVERRIDE;
+
+private:
+    wxObject* HandleCtrl();
+    wxObject* HandleListCtrl();
+    wxObject* HandleTreeCtrl();
+};
+
+#endif // wxUSE_XRC && wxUSE_DATAVIEWCTRL
+
+#endif // _WX_XH_DATAVIEW_H_