# HG changeset patch
# User drewp@bigasterisk.com
# Date 1339797967 0
# Node ID 8b2417058fe0378df081931d31d6f3b13a0599e1
# Parent  20d6884478bc42d1543d1690b37f0dfb5a3d3d67
patch weird gtk memory-clearing issue
Ignore-this: 6d77f8a885ab51adf8287d68383eb039

diff -r 20d6884478bc -r 8b2417058fe0 light9/curvecalc/subtermview.py
--- a/light9/curvecalc/subtermview.py	Fri Jun 15 20:50:20 2012 +0000
+++ b/light9/curvecalc/subtermview.py	Fri Jun 15 22:06:07 2012 +0000
@@ -5,6 +5,10 @@
 from light9.namespaces import L9
 from light9.curvecalc.subterm import Subterm, Subexpr
 
+# inspired by http://www.daa.com.au/pipermail/pygtk/2008-August/015772.html
+# keeping a ref to the __dict__ of the object stops it from getting zeroed
+keep = []
+
 class Subexprview(object):
     def __init__(self, se):
         self.subexpr = se
@@ -22,11 +26,15 @@
         self.expr_changed()
         self.entryBuffer.connect("deleted-text", self.entry_changed)
         self.entryBuffer.connect("inserted-text", self.entry_changed)
-        dispatcher.connect(self.expr_changed,"expr_changed",
+        dispatcher.connect(self.expr_changed, "expr_changed",
                            sender=self.subexpr)
 
-        dispatcher.connect(lambda exc: self.error.set_text(str(exc)),
-                           "expr_error",sender=self.subexpr,weak=0)
+        dispatcher.connect(self.exprError, "expr_error", sender=self.subexpr)
+        print "made", id(self), self.__dict__
+        keep.append(self.__dict__)
+
+    def exprError(self, exc):
+        self.error.set_text(str(exc))
         
     def expr_changed(self):
         e = str(self.subexpr.expr)
@@ -35,7 +43,7 @@
             
     def entry_changed(self, *args):
         self.subexpr.expr = self.entryBuffer.get_text()
-
+            
 class Subtermview(object):
     """
     has .label and .exprView widgets for you to put in a table
@@ -48,7 +56,6 @@
         sev = Subexprview(self.subterm.subexpr)
         self.exprView = sev.box
 
-
 def add_one_subterm(graph, subUri, curveset, subterms, master, expr=None, show=False):
     subname = graph.label(subUri)
     print "%s's label is %s" % (subUri, subname)