+ virtual bool IsActive() { return wxGetTopLevelParent(FindFocus()) == this; }
+
+ // this function may be overridden to return false to allow closing the
+ // application even when this top level window is still open
+ //
+ // notice that the window is still closed prior to the application exit and
+ // so it can still veto it even if it returns false from here
+ virtual bool ShouldPreventAppExit() const { return true; }
+
+
+#if defined(__SMARTPHONE__)
+ virtual void SetLeftMenu(int id = wxID_ANY, const wxString& label = wxEmptyString, wxMenu *subMenu = NULL) = 0;
+ virtual void SetRightMenu(int id = wxID_ANY, const wxString& label = wxEmptyString, wxMenu *subMenu = NULL) = 0;
+#endif // __SMARTPHONE__
+
+ // centre the window on screen: this is just a shortcut
+ void CentreOnScreen(int dir = wxBOTH) { DoCentre(dir | wxCENTRE_ON_SCREEN); }
+ void CenterOnScreen(int dir = wxBOTH) { CentreOnScreen(dir); }
+