Added code to persist and restore the expanded state of the tree view (hardware and type nodes).

External/Aga.Controls/Aga.Controls.csproj

@@ -91,6 +91,7 @@
     <Compile Include="TimeCounter.cs" />
     <Compile Include="Tree\Input\ReorderColumnState.cs" />
     <Compile Include="Tree\ListModel.cs" />
+    <Compile Include="Tree\MemberAdapter.cs" />
     <Compile Include="Tree\NodeControls\EditEventArgs.cs" />
     <Compile Include="Tree\NodeControls\LabelEventArgs.cs" />
     <Compile Include="Tree\NodeControls\NodeIntegerTextBox.cs">

External/Aga.Controls/Tree/MemberAdapter.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Text;
+
+namespace Aga.Controls.Tree {
+  internal struct MemberAdapter
+	{
+		private object _obj;
+		private PropertyInfo _pi;
+		private FieldInfo _fi;
+
+		public static readonly MemberAdapter Empty = new MemberAdapter();
+
+		public Type MemberType
+		{
+			get
+			{
+				if (_pi != null)
+					return _pi.PropertyType;
+				else if (_fi != null)
+					return _fi.FieldType;
+				else
+					return null;
+			}
+		}
+
+		public object Value
+		{
+			get
+			{
+				if (_pi != null && _pi.CanRead)
+					return _pi.GetValue(_obj, null);
+				else if (_fi != null)
+					return _fi.GetValue(_obj);
+				else
+					return null;
+			}
+			set
+			{
+				if (_pi != null && _pi.CanWrite)
+					_pi.SetValue(_obj, value, null);
+				else if (_fi != null)
+					_fi.SetValue(_obj, value);
+			}
+		}
+
+		public MemberAdapter(object obj, PropertyInfo pi)
+		{
+			_obj = obj;
+			_pi = pi;
+			_fi = null;
+		}
+
+		public MemberAdapter(object obj, FieldInfo fi)
+		{
+			_obj = obj;
+			_fi = fi;
+			_pi = null;
+		}
+	}
+}

External/Aga.Controls/Tree/NodeControls/BindableControl.cs

@@ -6,64 +6,10 @@ using System.ComponentModel;
 
 namespace Aga.Controls.Tree.NodeControls
 {
+	
 	public abstract class BindableControl : NodeControl
 	{
-		private struct MemberAdapter
-		{
-			private object _obj;
-			private PropertyInfo _pi;
-			private FieldInfo _fi;
-
-			public static readonly MemberAdapter Empty = new MemberAdapter();
-
-			public Type MemberType
-			{
-				get
-				{
-					if (_pi != null)
-						return _pi.PropertyType;
-					else if (_fi != null)
-						return _fi.FieldType;
-					else
-						return null;
-				}
-			}
-
-			public object Value
-			{
-				get
-				{
-					if (_pi != null && _pi.CanRead)
-						return _pi.GetValue(_obj, null);
-					else if (_fi != null)
-						return _fi.GetValue(_obj);
-					else
-						return null;
-				}
-				set
-				{
-					if (_pi != null && _pi.CanWrite)
-						_pi.SetValue(_obj, value, null);
-					else if (_fi != null)
-						_fi.SetValue(_obj, value);
-				}
-			}
-
-			public MemberAdapter(object obj, PropertyInfo pi)
-			{
-				_obj = obj;
-				_pi = pi;
-				_fi = null;
-			}
-
-			public MemberAdapter(object obj, FieldInfo fi)
-			{
-				_obj = obj;
-				_fi = fi;
-				_pi = null;
-			}
-		}
-
+		
 		#region Properties
 
 		private bool _virtualMode = false;

External/Aga.Controls/Tree/TreeNodeAdv.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Reflection;
 using System.Runtime.Serialization;
 using System.Security.Permissions;
 
@@ -205,7 +206,12 @@ namespace Aga.Controls.Tree
 
 		internal void AssignIsExpanded(bool value)
 		{
-			_isExpanded = value;
+			if (_isExpanded != value) 
+			{
+				_isExpanded = value;
+				var ma = GetMemberAdapter("IsExpanded");
+				ma.Value = value;
+			}
 		}
 
 		private TreeNodeAdv _parent;
@@ -336,7 +342,7 @@ namespace Aga.Controls.Tree
 			set { _isExpandingNow = value; }
 		}
 
-		private bool _autoExpandOnStructureChanged = true;
+		private bool _autoExpandOnStructureChanged = false;
 		public bool AutoExpandOnStructureChanged
 		{
 			get { return _autoExpandOnStructureChanged; }
@@ -357,6 +363,12 @@ namespace Aga.Controls.Tree
 			_nodes = new NodeCollection(this);
 			_children = new ReadOnlyCollection<TreeNodeAdv>(_nodes);
 			_tag = tag;
+
+			var value = GetMemberAdapter("IsExpanded").Value;
+			if (value != null && value is bool) 
+			{
+				_isExpanded = (bool)value;
+			}	
 		}
 
 		public override string ToString()
@@ -402,11 +414,29 @@ namespace Aga.Controls.Tree
 		private void SetIsExpanded(bool value, bool ignoreChildren)
 		{
 			if (Tree == null)
-				_isExpanded = value;
+				AssignIsExpanded(value);
 			else
 				Tree.SetIsExpanded(this, value, ignoreChildren);
 		}
 
+		private MemberAdapter GetMemberAdapter(string propertyName)
+		{
+			if (this.Tag != null && !string.IsNullOrEmpty(propertyName))
+			{
+				Type type = this.Tag.GetType();
+				PropertyInfo pi = type.GetProperty(propertyName);
+				if (pi != null)
+					return new MemberAdapter(this.Tag, pi);
+				else
+				{
+					FieldInfo fi = type.GetField(propertyName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+					if (fi != null)
+						return new MemberAdapter(this.Tag, fi);
+				}
+			}
+			return MemberAdapter.Empty;
+		}
+
 		#region ISerializable Members
 
 		private TreeNodeAdv(SerializationInfo info, StreamingContext context)

GUI/HardwareNode.cs

@@ -4,21 +4,21 @@
   License, v. 2.0. If a copy of the MPL was not distributed with this
   file, You can obtain one at http://mozilla.org/MPL/2.0/.
  
-  Copyright (C) 2009-2012 Michael Möller <mmoeller@openhardwaremonitor.org>
+  Copyright (C) 2009-2020 Michael Möller <mmoeller@openhardwaremonitor.org>
 	
 */
 
 using System;
 using System.Collections.Generic;
-using System.Drawing;
 using OpenHardwareMonitor.Hardware;
 
 namespace OpenHardwareMonitor.GUI {
   public class HardwareNode : Node {
 
-    private PersistentSettings settings;
-    private UnitManager unitManager;
-    private IHardware hardware;
+    private readonly PersistentSettings settings;
+    private readonly UnitManager unitManager;
+    private readonly IHardware hardware;
+    private readonly Identifier expandedIdentifier;
 
     private List<TypeNode> typeNodes = new List<TypeNode>();
 
@@ -31,13 +31,17 @@ namespace OpenHardwareMonitor.GUI {
       this.Image = HardwareTypeImage.Instance.GetImage(hardware.HardwareType);
 
       foreach (SensorType sensorType in Enum.GetValues(typeof(SensorType)))
-        typeNodes.Add(new TypeNode(sensorType));
+        typeNodes.Add(new TypeNode(sensorType, hardware, settings));
 
       foreach (ISensor sensor in hardware.Sensors)
         SensorAdded(sensor);
 
       hardware.SensorAdded +=new SensorEventHandler(SensorAdded);
       hardware.SensorRemoved += new SensorEventHandler(SensorRemoved);
+
+      this.expandedIdentifier = new Identifier(hardware.Identifier, "expanded");
+      base.IsExpanded = 
+        settings.GetValue(expandedIdentifier.ToString(), base.IsExpanded);
     }
 
     public override string Text {
@@ -49,6 +53,18 @@ namespace OpenHardwareMonitor.GUI {
       get { return hardware; }
     }
 
+    public override bool IsExpanded {
+      get {
+        return base.IsExpanded;
+      }
+      set {
+        if (base.IsExpanded != value) {
+          base.IsExpanded = value;
+          settings.SetValue(expandedIdentifier.ToString(), value);
+        }
+      }
+    }
+
     private void UpdateNode(TypeNode node) {  
       if (node.Nodes.Count > 0) {
         if (!Nodes.Contains(node)) {

GUI/Node.cs

@@ -4,7 +4,7 @@
   License, v. 2.0. If a copy of the MPL was not distributed with this
   file, You can obtain one at http://mozilla.org/MPL/2.0/.
  
-  Copyright (C) 2009-2010 Michael Möller <mmoeller@openhardwaremonitor.org>
+  Copyright (C) 2009-2020 Michael Möller <mmoeller@openhardwaremonitor.org>
 	
 */
 
@@ -25,6 +25,7 @@ namespace OpenHardwareMonitor.GUI {
     private string text;
     private Image image;
     private bool visible;
+    private bool expanded;
 
     private TreeModel RootTreeModel() {
       Node node = this;
@@ -42,6 +43,7 @@ namespace OpenHardwareMonitor.GUI {
       this.text = text;
       this.nodes = new NodeCollection(this);
       this.visible = true;
+      this.expanded = true;
     }
 
     public TreeModel Model {
@@ -83,6 +85,17 @@ namespace OpenHardwareMonitor.GUI {
       }
     }
 
+    public virtual bool IsExpanded {
+      get {
+        return expanded;
+      }
+      set {
+        if (value != expanded) {
+          expanded = value;
+        }
+      }
+    }
+
     public virtual bool IsVisible {
       get { return visible; }
       set {

GUI/TypeNode.cs

@@ -4,21 +4,26 @@
   License, v. 2.0. If a copy of the MPL was not distributed with this
   file, You can obtain one at http://mozilla.org/MPL/2.0/.
  
-  Copyright (C) 2009-2012 Michael Möller <mmoeller@openhardwaremonitor.org>
+  Copyright (C) 2009-2020 Michael Möller <mmoeller@openhardwaremonitor.org>
 	
 */
 
-using System;
-using System.Collections.Generic;
 using OpenHardwareMonitor.Hardware;
 
 namespace OpenHardwareMonitor.GUI {
   public class TypeNode : Node {
 
-    private SensorType sensorType;
+    private readonly PersistentSettings settings;
+    private readonly SensorType sensorType;
+    private readonly IHardware hardware;
+    private readonly Identifier expandedIdentifier;
 
-    public TypeNode(SensorType sensorType) : base() {
+    public TypeNode(SensorType sensorType, IHardware hardware, 
+      PersistentSettings settings) : base() 
+    {
+      this.settings = settings;
       this.sensorType = sensorType;
+      this.hardware = hardware;
 
       switch (sensorType) {
         case SensorType.Voltage: 
@@ -77,6 +82,11 @@ namespace OpenHardwareMonitor.GUI {
 
       NodeAdded += new NodeEventHandler(TypeNode_NodeAdded);
       NodeRemoved += new NodeEventHandler(TypeNode_NodeRemoved);
+
+      this.expandedIdentifier = new Identifier(new Identifier(hardware.Identifier,
+        sensorType.ToString().ToLowerInvariant()), "expanded");
+      base.IsExpanded = 
+        settings.GetValue(expandedIdentifier.ToString(), base.IsExpanded);
     }
 
     private void TypeNode_NodeRemoved(Node node) {
@@ -101,5 +111,17 @@ namespace OpenHardwareMonitor.GUI {
     public SensorType SensorType {
       get { return sensorType; }
     }
+
+    public override bool IsExpanded {
+      get {
+        return base.IsExpanded;
+      }
+      set {
+        if (base.IsExpanded != value) {
+          base.IsExpanded = value;
+          settings.SetValue(expandedIdentifier.ToString(), value);
+        }
+      }
+    }
   }
 }