+//-----------------------------------------------------------------------------
+// "switch_page"
+//-----------------------------------------------------------------------------
+
+static void
+gtk_mdi_page_change_callback( GtkNotebook *WXUNUSED(widget),
+ GtkNotebookPage *page,
+ gint WXUNUSED(page_num),
+ wxMDIParentFrame *parent )
+{
+ if (g_isIdle)
+ wxapp_install_idle_handler();
+
+ // send deactivate event to old child
+
+ wxMDIChildFrame *child = parent->GetActiveChild();
+ if (child)
+ {
+ wxActivateEvent event1( wxEVT_ACTIVATE, FALSE, child->GetId() );
+ event1.SetEventObject( child);
+ child->GetEventHandler()->ProcessEvent( event1 );
+ }
+
+ // send activate event to new child
+
+ wxMDIClientWindow *client_window = parent->GetClientWindow();
+ if (!client_window)
+ return;
+
+ child = (wxMDIChildFrame*) NULL;
+
+ wxNode *node = client_window->GetChildren().First();
+ while (node)
+ {
+ wxMDIChildFrame *child_frame = (wxMDIChildFrame *)node->Data();
+ if (child_frame->m_page == page)
+ {
+ child = child_frame;
+ break;
+ }
+ node = node->Next();
+ }
+
+ if (!child)
+ return;
+
+ wxActivateEvent event2( wxEVT_ACTIVATE, TRUE, child->GetId() );
+ event2.SetEventObject( child);
+ child->GetEventHandler()->ProcessEvent( event2 );
+}
+