[hamster-applet] support negative minutes in time entry

[Toms Baugis <tbaugis src gnome org>]

commit e42fdc13edd81d0c606c2783bab3479eb6afcb2a
Author: Toms Bauģis <toms baugis gmail com>
Date:   Sat Jun 6 19:23:32 2009 +0100

    support negative minutes in time entry
---
 hamster/stuff.py |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/hamster/stuff.py b/hamster/stuff.py
index 99bcce9..c20b29c 100644
--- a/hamster/stuff.py
+++ b/hamster/stuff.py
@@ -213,11 +213,17 @@ def parse_activity_input(text):
     
     potential_time = text.split(" ")[0]
     potential_end_time = None
-    if potential_time.find("-") > -1:
-        potential_time, potential_end_time = potential_time.split("-", 2)
-        res.end_time = figure_time(potential_end_time)
-    
-    res.start_time = figure_time(potential_time)
+    if len(potential_time) > 1 and  potential_time.startswith("-"):
+        #if starts with minus, treat as minus delta minutes
+        res.start_time = dt.datetime.now() + dt.timedelta(minutes =
+                                                            int(potential_time))
+
+    else:
+        if potential_time.find("-") > 0:
+            potential_time, potential_end_time = potential_time.split("-", 2)
+            res.end_time = figure_time(potential_end_time)
+        
+        res.start_time = figure_time(potential_time)
     
     #remove parts that worked
     if potential_end_time and not res.end_time: