emit only 1, not 2, events when changing text of a single line text control

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38882 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/textctrl.cpp

@@ -778,8 +778,13 @@ void wxTextCtrl::SetValue( const wxString &value )
 
         gtk_text_buffer_set_text( m_buffer, buffer, strlen(buffer) );
     }
-    else
+    else // single line
     {
+        // gtk_entry_set_text() emits two "changed" signals because internally
+        // it calls gtk_editable_delete_text() and gtk_editable_insert_text()
+        // but we want to have only one event
+        IgnoreNextTextUpdate();
+
         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV(value) );
     }