Bugfix [#28962] Changing actions via undo/delete all keyframes lacks UI refresh

Slightly hacky fix to get updates working for Action Editor header when there
are changes of the active action (via undo and/or deleting all keyframes at
once). Since the action referenced by the editor only gets updated when anim
channel filtering (e.g. as a result of the channel syncing operation) is
invoked. Added comments noting where these updates actually occur

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 6cc81218a6b..db4d40dd4c4 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -5551,6 +5551,12 @@ void lib_link_screen_restore(Main *newmain, bScreen *curscreen, Scene *curscene)
 					
 					if (saction->ads.filter_grp)
 						saction->ads.filter_grp= restore_pointer_by_name(newmain, (ID *)saction->ads.filter_grp, 0);
+						
+					
+					/* force recalc of list of channels, potentially updating the active action 
+					 * while we're at it (as it can only be updated that way) [#28962] 
+					 */
+					saction->flag |= SACTION_TEMP_NEEDCHANSYNC;
 				}
 				else if (sl->spacetype == SPACE_IMAGE) {
 					SpaceImage *sima = (SpaceImage *)sl;