VSE: Disable interactivity in combined view

Combined view of timeline and preview causes seemingly unpredictable
behavior after some operators have been allowed to run in preview
region.

Disable new features in this combined view, so behavior should be
consistent with previous versions.

ref: https://developer.blender.org/T92584

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D13419

1 files changed, 7 insertions, 6 deletions

diff --git a/source/blender/editors/transform/transform_convert_sequencer_image.c b/source/blender/editors/transform/transform_convert_sequencer_image.c
index e8af1680a41..d5a59885014 100644
--- a/source/blender/editors/transform/transform_convert_sequencer_image.c
+++ b/source/blender/editors/transform/transform_convert_sequencer_image.c
@@ -118,16 +118,17 @@ static void freeSeqData(TransInfo *UNUSED(t),
 void createTransSeqImageData(TransInfo *t)
 {
   Editing *ed = SEQ_editing_get(t->scene);
+  const SpaceSeq *sseq = t->area->spacedata.first;
+  const ARegion *region = t->region;
 
   if (ed == NULL) {
     return;
   }
-
-  {
-    const SpaceSeq *sseq = t->area->spacedata.first;
-    if (sseq->mainb != SEQ_DRAW_IMG_IMBUF) {
-      return;
-    }
+  if (sseq->mainb != SEQ_DRAW_IMG_IMBUF) {
+    return;
+  }
+  if (region->regiontype == RGN_TYPE_PREVIEW && sseq->view == SEQ_VIEW_SEQUENCE_PREVIEW) {
+    return;
   }
 
   ListBase *seqbase = SEQ_active_seqbase_get(ed);