added enabled and hidden attributes to radio box items in XRC

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54929 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/xrc/xmlres.h

@@ -462,6 +462,10 @@ protected:
     // Gets a font.
     wxFont GetFont(const wxString& param = wxT("font"));
 
+    // Gets the value of a boolean attribute (only "0" and "1" are valid values)
+    bool GetBoolAttr(const wxString& attr, bool defaultv);
+
+
     // Sets common window options.
     void SetupWindow(wxWindow *wnd);