From fb1012d2f9f566a26bd108c0f8ab179667a37184 Mon Sep 17 00:00:00 2001
From: Blacktempel <6657796+Blacktempel@users.noreply.github.com>
Date: Tue, 20 Jan 2026 17:12:38 +0100
Subject: [PATCH] Save expanded state also for: (#2173)

- Expand all nodes
- Collapse all nodes
---
 LibreHardwareMonitor/UI/MainForm.Designer.cs |  2 +-
 LibreHardwareMonitor/UI/MainForm.cs          | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/LibreHardwareMonitor/UI/MainForm.Designer.cs b/LibreHardwareMonitor/UI/MainForm.Designer.cs
index 5e20e61..b9cca1d 100644
--- a/LibreHardwareMonitor/UI/MainForm.Designer.cs
+++ b/LibreHardwareMonitor/UI/MainForm.Designer.cs
@@ -397,7 +397,7 @@ namespace LibreHardwareMonitor.UI
             this.collpaseAllNodesMenuItem.Name = "collpaseAllNodesMenuItem";
             this.collpaseAllNodesMenuItem.Size = new System.Drawing.Size(188, 22);
             this.collpaseAllNodesMenuItem.Text = "Collapse All Nodes";
-            this.collpaseAllNodesMenuItem.Click += new System.EventHandler(this.CollapsepAllNodes_Click);
+            this.collpaseAllNodesMenuItem.Click += new System.EventHandler(this.CollapseAllNodes_Click);
             //
             // resetPlotMenuItem
             //
diff --git a/LibreHardwareMonitor/UI/MainForm.cs b/LibreHardwareMonitor/UI/MainForm.cs
index 1b410cf..72230a8 100644
--- a/LibreHardwareMonitor/UI/MainForm.cs
+++ b/LibreHardwareMonitor/UI/MainForm.cs
@@ -1289,11 +1289,27 @@ public sealed partial class MainForm : Form
     private void ExpandAllNodes_Click(object sender, EventArgs e)
     {
         treeView.ExpandAll();
+
+        foreach (var node in treeView.AllNodes)
+        {
+            if (node.Tag is IExpandPersistNode expandPersistNode)
+            {
+                expandPersistNode.Expanded = true;
+            }
+        }
     }
 
-    private void CollapsepAllNodes_Click(object sender, EventArgs e)
+    private void CollapseAllNodes_Click(object sender, EventArgs e)
     {
         treeView.CollapseAll();
+
+        foreach (var node in treeView.AllNodes)
+        {
+            if (node.Tag is IExpandPersistNode expandPersistNode)
+            {
+                expandPersistNode.Expanded = false;
+            }
+        }
     }
 
     private void resetPlotMenuItem_Click(object sender, EventArgs e)