+void WidgetsFrame::OnPageChanging(WidgetsBookCtrlEvent& event)
+{
+#if USE_TREEBOOK
+ // don't allow selection of entries without pages (categories)
+ if ( !m_book->GetPage(event.GetSelection()) )
+ event.Veto();
+#else
+ wxUnusedVar(event);
+#endif
+}
+
+void WidgetsFrame::OnPageChanged(WidgetsBookCtrlEvent& event)
+{
+ const int sel = event.GetSelection();
+
+ // adjust "Page" menu selection
+ wxMenuItem *item = GetMenuBar()->FindItem(Widgets_GoToPage + sel);
+ if ( item )
+ item->Check();
+
+ GetMenuBar()->Check(Widgets_BusyCursor, false);
+
+ // lazy creation of the pages
+ WidgetsPage *page = CurrentPage();
+ if ( page->GetChildren().empty() )
+ {
+ wxWindowUpdateLocker noUpdates(page);
+ page->CreateContent();
+ WidgetsBookCtrl *book = wxStaticCast(page->GetParent(), WidgetsBookCtrl);
+ wxSize size;
+ for ( size_t i = 0; i < book->GetPageCount(); ++i )
+ {
+ wxWindow *page = book->GetPage(i);
+ if ( page )
+ {
+ size.IncTo(page->GetSize());
+ }
+ }
+ page->SetSize(size);
+ }
+
+ event.Skip();
+}
+
+void WidgetsFrame::OnGoToPage(wxCommandEvent& event)
+{
+#if USE_TREEBOOK
+ m_book->SetSelection(event.GetId() - Widgets_GoToPage);
+#else
+ m_book->SetSelection(m_book->GetPageCount()-1);
+ WidgetsBookCtrl *book = wxStaticCast(m_book->GetCurrentPage(), WidgetsBookCtrl);
+ book->SetSelection(event.GetId() - Widgets_GoToPage);
+#endif
+}
+