fix insert silence regression

engine/api.py

@@ -334,7 +334,8 @@ def convert_subdivisions(value, errorHandling):
     return result
 
 def set_numberOfMeasures(value):
-    if session.data.numberOfMeasures == value: return
+    if session.data.numberOfMeasures == value:
+        return
     session.data.numberOfMeasures = value
     session.data.buildSongDuration()
     updatePlayback()
@@ -342,7 +343,8 @@ def set_numberOfMeasures(value):
     callbacks._scoreChanged() #redundant but cheap and convenient
 
 def set_measuresPerGroup(value):
-    if session.data.measuresPerGroup == value: return
+    if session.data.measuresPerGroup == value:
+        return
     session.data.measuresPerGroup = value
     #No playback change
     callbacks._scoreChanged()
@@ -514,10 +516,16 @@ def setSwitchHalftoneTranspose(trackId, position, transpose):
 
 def insertSilence(howMany, beforeMeasureNumber):
     """Insert empty measures into all tracks"""
+
+    #In each track shift every switch to the right if it is before the dividing measure number
+    #Keep the concept of a "group" even if there are multiplicators in the track.
+    #If you insert 4 normal measures then a multiplicator-track of two gets only 2 new ones.
     for track in session.data.tracks:
-        track.structure = set( (switch + howMany if switch >= beforeMeasureNumber else switch) for switch in track.structure )
-        track.whichPatternsAreScaleTransposed = { (k+howMany if k >= beforeMeasureNumber else k):v for k,v in track.whichPatternsAreScaleTransposed.items() }
-        track.whichPatternsAreHalftoneTransposed = { (k+howMany if k >= beforeMeasureNumber else k):v for k,v in track.whichPatternsAreHalftoneTransposed.items() }
+        thisTrackWhere = beforeMeasureNumber // track.patternLengthMultiplicator #integer division
+        thisTrackHowMany = howMany // track.patternLengthMultiplicator #integer division
+        track.structure = set( (switch + thisTrackHowMany if switch >= thisTrackWhere else switch) for switch in track.structure )
+        track.whichPatternsAreScaleTransposed = { (k+thisTrackHowMany if k >= thisTrackWhere else k):v for k,v in track.whichPatternsAreScaleTransposed.items() }
+        track.whichPatternsAreHalftoneTransposed = { (k+thisTrackHowMany if k >= thisTrackWhere else k):v for k,v in track.whichPatternsAreHalftoneTransposed.items() }
         callbacks._trackStructureChanged(track)
     session.data.buildAllTracks()
     updatePlayback()