optimize: re-use old content when list changes

diff --git a/lib/python/Components/Converter/StringList.py b/lib/python/Components/Converter/StringList.py
index 1304c6430bf19be16934538008e7a86bc8ab8640..4199212a33f348bbe1494a95500e7adea357b464 100644 (file)
--- a/lib/python/Components/Converter/StringList.py
+++ b/lib/python/Components/Converter/StringList.py
@@ -6,9 +6,12 @@ class StringList(Converter):
        """Turns a simple python list into a list which can be used in a listbox."""
        def __init__(self, type):
                Converter.__init__(self, type)
        """Turns a simple python list into a list which can be used in a listbox."""
        def __init__(self, type):
                Converter.__init__(self, type)

+               self.content = None

 
        def changed(self, what):
 
        def changed(self, what):

-               self.content = eListboxPythonStringContent()
+               if not self.content:
+                       self.content = eListboxPythonStringContent()
+

                if self.source:
                        self.content.setList(self.source.list)
                self.downstream_elements.changed(what)
                if self.source:
                        self.content.setList(self.source.list)
                self.downstream_elements.changed(what)