# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1512249531 -3600
# Node ID 89bd11dc92d3b9c4c8547a0227285b14fbb1055f
# Parent  4a33f1cb48ac5b83f21e7b7ee72a223eb2d1932e
Ensure that interval updates propagate correctly to the iterator.

diff -r 4a33f1cb48ac -r 89bd11dc92d3 vRecurrence.py
--- a/vRecurrence.py	Sat Dec 02 20:15:20 2017 +0100
+++ b/vRecurrence.py	Sat Dec 02 22:18:51 2017 +0100
@@ -891,17 +891,20 @@
 
     def __init__(self, level, args, qualifier, selecting=None, first=False):
         Selector.__init__(self, level, args, qualifier, selecting, first)
-
         multiple = get_multiple(self.qualifier)
-        interval = self.get_interval()
-
-        # Define the step between result periods.
-
-        self.step = scale(interval * multiple, level)
 
         # Define the scale of a single period.
 
         self.unit_step = scale(multiple, level)
+        self.update_step()
+
+    def update_step(self):
+
+        "Update the step between result periods."
+
+        multiple = get_multiple(self.qualifier)
+        interval = self.get_interval()
+        self.step = scale(interval * multiple, self.level)
 
     def materialise_items(self, context, start, end, inclusive=False):
 
@@ -932,6 +935,7 @@
 
     def set_interval(self, interval):
         self.args["interval"] = interval
+        self.update_step()
 
 class WeekDayFilter(Selector):