From 6584510d390a37153c20974da6704a907058fea0 Mon Sep 17 00:00:00 2001
From: mike <michael.jmontcalm@gmail.com>
Date: Mon, 19 Oct 2009 04:38:32 +0000
Subject: Merge gitorious@git.sugarlabs.org:tutorius/michaeljm-dev into merge_michaeljm-dev

---
(limited to 'addons/triggereventfilter.py')

diff --git a/addons/triggereventfilter.py b/addons/triggereventfilter.py
new file mode 100644
index 0000000..06c0995
--- /dev/null
+++ b/addons/triggereventfilter.py
@@ -0,0 +1,46 @@
+# Copyright (C) 2009, Tutorius.org
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+from sugar.tutorius.filters import *
+from sugar.tutorius.properties import *
+
+class TriggerEventFilter(EventFilter):
+    """
+    This event filter can be triggered by simply calling its do_callback function.
+    
+    Used to fake events and see the effect on the FSM.
+    """
+    def __init__(self, next_state):
+        EventFilter.__init__(self, next_state)
+        self.toggle_on_callback = False
+    
+    def install_handlers(self, callback, **kwargs):
+        """
+        Forsakes the incoming callback function and just set the inner one.
+        """
+        self._callback = self._inner_cb
+    
+    def _inner_cb(self, event_filter):
+        self.toggle_on_callback = not self.toggle_on_callback
+
+__event__ = {
+    'name' : 'TriggerEventFilter',
+    'display_name' : 'Triggerable event filter (test only)',
+    'icon' : '',
+    'class' : TriggerEventFilter,
+    'mandatory_props' : ['next_state'],
+    'test' : True
+}
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