added wxTextCtrl::ChangeValue() which is the same as SetValue() but doesn't send the text changed event (first part of patch 1553551)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41739 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/textctrl.cpp

@@ -412,10 +412,16 @@ wxString wxTextCtrl::GetValue() const
     return tmp;
 }
 
-void wxTextCtrl::SetValue( const wxString &value )
+void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 {
     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 
+    if ( !(flags & SetValue_SendEvent) )
+    {
+        // do not generate events
+        IgnoreNextTextUpdate();
+    }
+
     if (m_windowStyle & wxTE_MULTILINE)
     {
         gint len = gtk_text_get_length( GTK_TEXT(m_text) );