Tried to make wxListBox::Update() work

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54463 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/listbox.h

@@ -75,6 +75,8 @@ public:
 
     virtual void EnsureVisible(int n);
 
+    virtual void Update();
+
     static wxVisualAttributes
     GetClassDefaultAttributes(wxWindowVariant variant = wxWINDOW_VARIANT_NORMAL);
 

src/gtk/listbox.cpp

@@ -504,6 +504,15 @@ void wxListBox::GtkEnableEvents()
     UpdateOldSelections();
 }
 
+
+void wxListBox::Update()
+{
+    wxWindow::Update();
+    
+    if (m_treeview)
+        gdk_window_process_updates(m_wxwindow->window, TRUE);
+}
+
 // ----------------------------------------------------------------------------
 // adding items
 // ----------------------------------------------------------------------------