# HG changeset patch
# User Björn Ricks <bjoern.ricks@intevation.de>
# Date 1365185660 -7200
# Node ID f958ce12ba5aa600a8d67f24d18cbbb176f2a0ab
# Parent  c8f85809607b15a7ea9e3086671d17567d1d6a59
Implement an own ListWalker class

Allow to handle focus changed via a callback method in the widget class.

diff -r c8f85809607b -r f958ce12ba5a getan/walker.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/getan/walker.py	Fri Apr 05 20:14:20 2013 +0200
@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+#
+# (c) 2013 by Björn Ricks <bjoern.ricks@intevation.de>
+#
+# This is Free Software licensed under the terms of GPLv3 or later.
+# For details see LICENSE coming with the source of 'getan'.
+#
+import logging
+
+import urwid
+
+
+logger = logging.getLogger(__name__)
+
+class ListWalker(urwid.SimpleListWalker):
+
+    def __init__(self, content, widget=None):
+        logger.info("Init ListWalker")
+        super(ListWalker, self).__init__(content)
+        self.widget = widget
+        self.position = None
+
+    def set_focus(self, position):
+        super(ListWalker, self).set_focus(position)
+        if self.widget and self.position != position:
+            self.position = position
+            self.widget.content_focus_changed()
+