restructure fullscreen code dealing with hiding bars

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46223 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/frame.h

@@ -69,6 +69,7 @@ public:
     void SetToolBar(wxToolBar *toolbar);
 #endif // wxUSE_TOOLBAR
     
+    virtual bool ShowFullScreen(bool show, long style = wxFULLSCREEN_ALL);
     wxPoint GetClientAreaOrigin() const { return wxPoint(0, 0); }
 
     // implementation from now on
@@ -104,6 +105,9 @@ public:
 
 #endif // wxUSE_MENUS_NATIVE
 
+private:
+    long m_fsSaveFlag;
+
     DECLARE_DYNAMIC_CLASS(wxFrame)
 };