From af55b309c49ab662ab649ddf331be1bfac9816d1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 19 Apr 2026 20:55:14 +0000
Subject: [PATCH 1/2] Initial plan


From 59cedfa51ade958c12543d1725a9efd9f51f52d2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 19 Apr 2026 21:00:09 +0000
Subject: [PATCH 2/2] fix: guard volume event node ui teardown

Agent-Logs-Url: https://github.com/TombEngine/Tomb-Editor/sessions/35465f2b-a4e7-4071-b0e1-12c07ddd6896

Co-authored-by: Nickelony <20436882+Nickelony@users.noreply.github.com>
---
 TombEditor/Controls/TriggerManager.cs         |  4 ++++
 .../VisualScripting/VisibleNodeBase.cs        | 23 +++++++++++++------
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/TombEditor/Controls/TriggerManager.cs b/TombEditor/Controls/TriggerManager.cs
index 5205948e2c..d461211de8 100644
--- a/TombEditor/Controls/TriggerManager.cs
+++ b/TombEditor/Controls/TriggerManager.cs
@@ -69,6 +69,10 @@ obj is Editor.EventSetsChangedEvent ||
                     BeginInvoke((Action)(() =>
                     {
                         _nodeListRefreshPending = false;
+
+                        if (IsDisposed || !IsHandleCreated || nodeEditor.IsDisposed)
+                            return;
+
                         nodeEditor.PopulateCachedNodeLists(_editor.Level);
                         nodeEditor.RefreshArgumentUI();
                     }));
diff --git a/TombLib/TombLib.Forms/Controls/VisualScripting/VisibleNodeBase.cs b/TombLib/TombLib.Forms/Controls/VisualScripting/VisibleNodeBase.cs
index 82f2d9163b..caeda1b8b7 100644
--- a/TombLib/TombLib.Forms/Controls/VisualScripting/VisibleNodeBase.cs
+++ b/TombLib/TombLib.Forms/Controls/VisualScripting/VisibleNodeBase.cs
@@ -162,19 +162,25 @@ public void SelectFirstFunction(ArgumentType type, string luaName)
 
         public void SpawnUIElements()
         {
+            if (IsDisposed || Disposing || Node == null)
+                return;
+
+            var editor = Editor;
             var func = cbFunction.SelectedItem as NodeFunction;
 
-            if (func == null)
+            if (func == null || editor == null || editor.IsDisposed)
                 return;
 
             Visible = false;
-            Editor.LockNodeChanges = true;
+            editor.LockNodeChanges = true;
             SuspendLayout();
             DisposeUI();
 
             var scale = 1.0f;
-            using (var gfx = FindForm().CreateGraphics())
-                scale = (float)gfx.DpiX / 96.0f;
+            var form = FindForm();
+            if (form != null && !form.IsDisposed)
+                using (var gfx = form.CreateGraphics())
+                    scale = (float)gfx.DpiX / 96.0f;
 
             Size = new Size((int)(Node.Size * scale), Size.Height);
 
@@ -279,10 +285,10 @@ public void SpawnUIElements()
 
             RefreshLock();
             ResumeLayout();
-            Editor.LockNodeChanges = false;
+            editor.LockNodeChanges = false;
             Visible = true;
             Invalidate();
-            Editor?.Invalidate();
+            editor.Invalidate();
         }
 
         private void Ctrl_LocatedItemFound(object sender, EventArgs e)
@@ -683,6 +689,9 @@ private void cbFunction_SelectedIndexChanged(object sender, EventArgs e)
                 return;
 
             var funcSetup = cbFunction.SelectedItem as NodeFunction;
+            if (funcSetup == null || Node == null || IsDisposed || Disposing)
+                return;
+
             Node.Function = funcSetup.Signature;
 
             if ((_lastSelectedIndex != -1 && cbFunction.SelectedIndex != -1) || (funcSetup.Arguments.Count != Node.Arguments.Count))
@@ -700,4 +709,4 @@ private void cbFunction_MouseDown(object sender, MouseEventArgs e)
             Ctrl_RightClick(sender, e);
         }
     }
-}
\ No newline at end of file
+}