Initial code commit

item.py

@@ -0,0 +1,53 @@
+# item.py
+
+import timings
+
+class Item:
+    def __init__(self, title, events):
+        self._title = title
+        self._events = events
+        self._timings = timings.Timings()
+        for event in self._events:
+            event.set_timings(self._timings)
+            event.prepare()
+        self.resolve()
+
+    def reset(self):
+        self._timings.reset()
+        self.resolve()
+
+    def resolve(self):
+        self._timings.resolve()
+        self._timings.resolve(final=True)
+        def eventkey(x):
+            x = x.at
+            if x is None:
+                return (1, x)
+            else:
+                return (0, x)
+        self._events.sort(key=eventkey)
+#        print("Item {}".format(self._title))
+#        for event in self._events:
+#            print("Event at time {}".format(event.at))
+
+    def activate(self, marker, time):
+        if marker is None:
+            marker = self._timings.get_button()
+        if marker is None:
+            return False
+        self._timings.set_marker(marker, time)
+        self.resolve()
+        return True
+
+    def get_next_button(self):
+        return self._timings.get_button()
+
+    def get_title(self):
+        return self._title
+
+    def get_timings(self):
+        return self._timings
+
+    def set_audiencecontent(self, audiencecontent):
+        for event in self._events:
+            event.set_audiencecontent(audiencecontent)