+ wxCHECK_MSG( menu, false, "can't popup NULL menu" );
+
+ wxMenuInvokingWindowSetter
+ setInvokingWin(*menu, static_cast<wxWindow *>(this));
+
+ wxCurrentPopupMenu = menu;
+ const bool rc = DoPopupMenu(menu, x, y);
+ wxCurrentPopupMenu = NULL;
+
+ return rc;
+}
+
+// this is used to pass the id of the selected item from the menu event handler
+// to the main function itself
+//
+// it's ok to use a global here as there can be at most one popup menu shown at
+// any time
+static int gs_popupMenuSelection = wxID_NONE;
+
+void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
+{
+ // store the id in a global variable where we'll retrieve it from later
+ gs_popupMenuSelection = event.GetId();
+}
+
+void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
+{
+ // nothing to do but do not skip it
+}
+
+int
+wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
+{
+ gs_popupMenuSelection = wxID_NONE;
+
+ Connect(wxEVT_COMMAND_MENU_SELECTED,
+ wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
+ NULL,
+ this);
+
+ // it is common to construct the menu passed to this function dynamically
+ // using some fixed range of ids which could clash with the ids used
+ // elsewhere in the program, which could result in some menu items being
+ // unintentionally disabled or otherwise modified by update UI handlers
+ // elsewhere in the program code and this is difficult to avoid in the
+ // program itself, so instead we just temporarily suspend UI updating while
+ // this menu is shown
+ Connect(wxEVT_UPDATE_UI,
+ wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
+ NULL,
+ this);
+
+ PopupMenu(&menu, x, y);
+
+ Disconnect(wxEVT_UPDATE_UI,
+ wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
+ NULL,
+ this);
+ Disconnect(wxEVT_COMMAND_MENU_SELECTED,
+ wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
+ NULL,
+ this);
+
+ return gs_popupMenuSelection;
+}
+
+#endif // wxUSE_MENUS
+
+// methods for drawing the sizers in a visible way: this is currently only
+// enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
+// that well and also because we don't want to leave it enabled in default
+// builds used for production
+#if wxDEBUG_LEVEL > 1
+
+static void DrawSizers(wxWindowBase *win);
+
+static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
+{
+ wxClientDC dc((wxWindow *)win);
+ dc.SetPen(*pen);
+ dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
+ *wxTRANSPARENT_BRUSH);
+ dc.DrawRectangle(rect.Deflate(1, 1));
+}
+
+static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
+{
+ const wxSizerItemList& items = sizer->GetChildren();
+ for ( wxSizerItemList::const_iterator i = items.begin(),
+ end = items.end();
+ i != end;
+ ++i )