Fixed #2178 Undo on sprites

CHANGELOG.md

@@ -16,6 +16,7 @@ All notable changes to this project will be documented in this file.
 - [#2174] Ignoring PlaceObjects with flagMove on empty depth
 - [#2175] Removing DefineButtonSound, warning about incorrect sound character type in FLA export
 - [#2175] FLA Export - exporting 320kbps MP3s as 160kbps
+- [#2178] Undo on sprites
 
 ## [20.1.0] - 2023-12-30
 ### Added
@@ -3366,6 +3367,7 @@ Major version of SWF to XML export changed to 2.
 [#2172]: https://www.free-decompiler.com/flash/issues/2172
 [#2174]: https://www.free-decompiler.com/flash/issues/2174
 [#2175]: https://www.free-decompiler.com/flash/issues/2175
+[#2178]: https://www.free-decompiler.com/flash/issues/2178
 [#2100]: https://www.free-decompiler.com/flash/issues/2100
 [#2123]: https://www.free-decompiler.com/flash/issues/2123
 [#2119]: https://www.free-decompiler.com/flash/issues/2119

src/com/jpexs/decompiler/flash/gui/tagtree/TagTreeContextMenu.java

@@ -3482,6 +3482,9 @@ public class TagTreeContextMenu extends JPopupMenu {
                     Tag tag = (Tag) item;
                     tag.undo();
                     tag.getSwf().clearAllCache();
+                    if (tag instanceof Timelined) {
+                        ((Timelined) tag).resetTimeline();
+                    }
                     tree.getFullModel().updateNode(item);
                 } catch (InterruptedException | IOException ex) {
                     logger.log(Level.SEVERE, null, ex);