From 1601f7f4b1dd611588b8355352eb2826a03d9561 Mon Sep 17 00:00:00 2001
From: David Capello <david@igarastudio.com>
Date: Mon, 25 Apr 2022 12:54:13 -0300
Subject: [PATCH] Fix timeline re-painting issues when copying & pasting cels
 (fix #3242)

---
 src/app/ui/timeline/timeline.cpp | 10 ++++++++++
 src/app/ui/timeline/timeline.h   |  4 +++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/app/ui/timeline/timeline.cpp b/src/app/ui/timeline/timeline.cpp
index 1702f3bc0..94b123503 100644
--- a/src/app/ui/timeline/timeline.cpp
+++ b/src/app/ui/timeline/timeline.cpp
@@ -1888,6 +1888,16 @@ void Timeline::onRemoveFrame(DocEvent& ev)
   invalidate();
 }
 
+void Timeline::onAddCel(DocEvent& ev)
+{
+  invalidateLayer(ev.layer());
+}
+
+void Timeline::onAfterRemoveCel(DocEvent& ev)
+{
+  invalidateLayer(ev.layer());
+}
+
 void Timeline::onLayerNameChange(DocEvent& ev)
 {
   invalidate();
diff --git a/src/app/ui/timeline/timeline.h b/src/app/ui/timeline/timeline.h
index c1a21b415..2e7a1424f 100644
--- a/src/app/ui/timeline/timeline.h
+++ b/src/app/ui/timeline/timeline.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2021  Igara Studio S.A.
+// Copyright (C) 2018-2022  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -158,6 +158,8 @@ namespace app {
     void onAfterRemoveLayer(DocEvent& ev) override;
     void onAddFrame(DocEvent& ev) override;
     void onRemoveFrame(DocEvent& ev) override;
+    void onAddCel(DocEvent& ev) override;
+    void onAfterRemoveCel(DocEvent& ev) override;
     void onLayerNameChange(DocEvent& ev) override;
     void onAddTag(DocEvent& ev) override;
     void onRemoveTag(DocEvent& ev) override;