# HG changeset patch
# User Thinker K.F. Li <thinker@codemud.net>
# Date 1294713399 -28800
# Node ID 71222a6b4c063cc4b0471c1e7412aebb621f964a
# Parent  fb5ad43c13eb8e2deff6201b500312836ca835be
Implement lock for domview_ui

diff -r fb5ad43c13eb -r 71222a6b4c06 pyink/domview_ui.py
--- a/pyink/domview_ui.py	Tue Jan 11 10:33:46 2011 +0800
+++ b/pyink/domview_ui.py	Tue Jan 11 10:36:39 2011 +0800
@@ -361,6 +361,7 @@
 	self._dom = domview()
         self._doc = None
         self._root = None
+        self._lock = False
 	pass
 
     ## \brief Update content of a frameline from scenes of respective layer.
@@ -641,9 +642,13 @@
         return self._root
 
     def lock(self):
+        if self._lock:
+            return False
+        self._lock = True
         return True
 
     def unlock(self):
+        self._lock = False
         return True
     pass