From 32f4c1f966a96b3fb59ddf3d19625260a2e9d187 Mon Sep 17 00:00:00 2001
From: psychedelicious <4822129+psychedelicious@users.noreply.github.com>
Date: Thu, 9 May 2024 10:10:01 +1000
Subject: [PATCH] fix(ui): memoize mouse event handlers

This prevents resetting the stage event handlers on every frame. Whoops!
---
 .../src/features/controlLayers/hooks/mouseEventHooks.ts    | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/invokeai/frontend/web/src/features/controlLayers/hooks/mouseEventHooks.ts b/invokeai/frontend/web/src/features/controlLayers/hooks/mouseEventHooks.ts
index fa49fdb473..514e8c35ff 100644
--- a/invokeai/frontend/web/src/features/controlLayers/hooks/mouseEventHooks.ts
+++ b/invokeai/frontend/web/src/features/controlLayers/hooks/mouseEventHooks.ts
@@ -224,5 +224,10 @@ export const useMouseEvents = () => {
     [selectedLayerType, tool, shouldInvertBrushSizeScrollDirection, dispatch, brushSize]
   );
 
-  return { onMouseDown, onMouseUp, onMouseMove, onMouseLeave, onMouseWheel };
+  const handlers = useMemo(
+    () => ({ onMouseDown, onMouseUp, onMouseMove, onMouseLeave, onMouseWheel }),
+    [onMouseDown, onMouseUp, onMouseMove, onMouseLeave, onMouseWheel]
+  );
+
+  return handlers;
 };