Merge pull request psychopy#6814 from zeyus/master

ENH: allow recursive callOnFlip() calls
mdcutone · Sep 16, 2024 · 6ea8121 · 6ea8121
2 parents ad1a0ea + e12db30
commit 6ea8121
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/psychopy/visual/window.py b/psychopy/visual/window.py
@@ -1320,10 +1320,12 @@ def flip(self, clearBuffer=True):
         self._frameTime = now = logging.defaultClock.getTime()
         self._frameTimes.append(self._frameTime)
 
-        # run other functions immediately after flip completes
-        for callEntry in self._toCall:
-            callEntry['function'](*callEntry['args'], **callEntry['kwargs'])
-        del self._toCall[:]
+        # run scheduled functions immediately after flip completes
+        n_items = len(self._toCall)
+        for i in range(n_items):
+            self._toCall[i]['function'](*self._toCall[i]['args'], **self._toCall[i]['kwargs'])
+        # leave newly scheduled functions for next flip
+        del self._toCall[:n_items]
 
         # do bookkeeping
         if self.recordFrameIntervals: