From e4670e129d35c0f5a1c6322ec32860aeed5f83a7 Mon Sep 17 00:00:00 2001
From: rowanc1 <rowan@visiblegeology.com>
Date: Wed, 14 May 2014 11:29:58 -0700
Subject: [PATCH] Add callback on optimization routines

---
 SimPEG/Optimization.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/SimPEG/Optimization.py b/SimPEG/Optimization.py
index 7a89fa89..77b6772e 100644
--- a/SimPEG/Optimization.py
+++ b/SimPEG/Optimization.py
@@ -112,6 +112,16 @@ class Minimize(object):
 
         Utils.setKwargs(self, **kwargs)
 
+    @property
+    def callback(self):
+        return getattr(self, '_callback', None)
+    @callback.setter
+    def callback(self, value):
+        if self.callback is not None:
+            print 'The callback on the %s Optimization was replaced.' % self.__name__
+        self._callback = value
+
+
     @Utils.timeIt
     def minimize(self, evalFunction, x0):
         """minimize(evalFunction, x0)
@@ -414,6 +424,8 @@ class Minimize(object):
             :rtype: None
             :return: None
         """
+        if self.callback is not None:
+            self.callback(xt)
         # store old values
         self.f_last = self.f
         self.x_last, self.xc = self.xc, xt