X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=futatabi%2Fclip_list.cpp;h=f76906f2a2b4f539a02506f2a01324e6c17b8836;hb=refs%2Fheads%2Fmaster;hp=7e554b08536d0d03820d7cfb05ba7bb20552542d;hpb=c6fb9649d9f9c2e2cf3d1ac16c6c359630fe72bf;p=nageru

diff --git a/futatabi/clip_list.cpp b/futatabi/clip_list.cpp
index 7e554b0..f76906f 100644
--- a/futatabi/clip_list.cpp
+++ b/futatabi/clip_list.cpp
@@ -379,8 +379,13 @@ void PlayList::add_clip(const Clip &clip)
 
 void PlayList::duplicate_clips(size_t first, size_t last)
 {
-	beginInsertRows(QModelIndex(), first, last);
-	clips.insert(clips.begin() + first, clips.begin() + first, clips.begin() + last + 1);
+	beginInsertRows(QModelIndex(), last + 1, last + 1 + (last - first));
+
+	vector<ClipWithID> new_clips;
+	for (auto it = clips.begin() + first; it <= clips.begin() + last; ++it) {
+		new_clips.emplace_back(ClipWithID{ it->clip, clip_counter++ });  // Give them new IDs.
+	}
+	clips.insert(clips.begin() + last + 1, new_clips.begin(), new_clips.end());  // Note: The new elements are inserted after the old ones.
 	endInsertRows();
 	emit any_content_changed();
 }