added wxBookCtrl::ChangeSelection() which is the same as SetSelection() but doesn't send the page change events (second part of patch 1553551)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41738 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/notebook.h

@@ -57,10 +57,13 @@ public:
     // set the currently selected page, return the index of the previously
     // selected one (or -1 on error)
     // NB: this function will _not_ generate wxEVT_NOTEBOOK_PAGE_xxx events
-  int SetSelection(size_t nPage);
+  int SetSelection(size_t nPage) { return DoSetSelection(nPage, SetSelection_SendEvent); }
     // get the currently selected page
   int GetSelection() const { return m_nSelection; }
 
+    // changes selected page without sending events
+  int ChangeSelection(size_t nPage) { return DoSetSelection(nPage); }
+
     // set/get the title of a page
   bool SetPageText(size_t nPage, const wxString& strText);
   wxString GetPageText(size_t nPage) const;
@@ -125,6 +128,8 @@ protected:
   void ChangePage(int nOldSel, int nSel); // change pages
   void MacSetupTabs();
 
+  int DoSetSelection(size_t nPage, int flags = 0);
+
   // the icon indices
   wxArrayInt m_images;