From 802267cd2172eb0929bdadafc309f3c7322f4300 Mon Sep 17 00:00:00 2001
From: Reinier Heeres <reinier@heeres.eu>
Date: Thu, 10 Jan 2008 17:55:57 +0100
Subject: [PATCH] Implement Activity.can_close(), #5493

---
 lib/sugar/activity/activity.py | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/sugar/activity/activity.py b/lib/sugar/activity/activity.py
index d9886f97..f6dbd378 100644
--- a/lib/sugar/activity/activity.py
+++ b/lib/sugar/activity/activity.py
@@ -838,12 +838,24 @@ class Activity(Window, gtk.Container):
         if response_id == gtk.RESPONSE_OK:
             self.close(skip_save=True)
 
-    def close(self, skip_save=False):
+    def can_close(self):
+        """Activities should override this function if they want to perform
+        extra checks before actually closing."""
+
+        return True
+
+    def close(self, force=False, skip_save=False):
         """Request that the activity be stopped and saved to the Journal
         
         Activities should not override this method, but should implement write_file() to
-        do any state saving instead.
+        do any state saving instead. If the application wants to control wether it can
+        close, it should override can_close().
         """
+
+        if not force:
+            if not self.can_close():
+                return
+
         try:
             if not skip_save:
                 self.save()