Profile editor - Added element removal

src/Artemis.Core/Models/Profile/Folder.cs

@@ -266,19 +266,7 @@ namespace Artemis.Core
         ///     Occurs when a property affecting the rendering properties of this folder has been updated
         /// </summary>
         public event EventHandler? RenderPropertiesUpdated;
-
-        /// <inheritdoc />
-        public override void Activate()
-        {
-            throw new NotImplementedException();
-        }
-
-        /// <inheritdoc />
-        public override void Deactivate()
-        {
-            throw new NotImplementedException();
-        }
-
+        
         /// <inheritdoc />
         protected override void Dispose(bool disposing)
         {

src/Artemis.Core/Models/Profile/Layer.cs

@@ -488,18 +488,6 @@ namespace Artemis.Core
                 baseLayerEffect.InternalUpdate(Timeline);
         }
 
-        /// <inheritdoc />
-        public override void Activate()
-        {
-            throw new NotImplementedException();
-        }
-
-        /// <inheritdoc />
-        public override void Deactivate()
-        {
-            throw new NotImplementedException();
-        }
-
         /// <inheritdoc />
         public override void Disable()
         {

src/Artemis.Core/Models/Profile/ProfileElement.cs

@@ -182,7 +182,7 @@ namespace Artemis.Core
         private void StreamlineOrder()
         {
             for (int index = 0; index < ChildrenList.Count; index++)
-                ChildrenList[index].Order = index;
+                ChildrenList[index].Order = index + 1;
         }
 
         /// <summary>

src/Artemis.Core/Models/Profile/RenderProfileElement.cs

@@ -52,17 +52,7 @@ namespace Artemis.Core
         ///     Occurs when a layer effect has been added or removed to this render element
         /// </summary>
         public event EventHandler? LayerEffectsUpdated;
-
-        /// <summary>
-        ///     Activates the render profile element, loading required brushes, effects or anything else needed for rendering
-        /// </summary>
-        public abstract void Activate();
-
-        /// <summary>
-        ///     Deactivates the render profile element, disposing required brushes, effects or anything else needed for rendering
-        /// </summary>
-        public abstract void Deactivate();
-
+        
         /// <inheritdoc />
         protected override void Dispose(bool disposing)
         {

src/Avalonia/Artemis.UI.Shared/Services/ProfileEditor/Commands/RemoveProfileElement.cs

@@ -12,6 +12,7 @@ public class RemoveProfileElement : IProfileEditorCommand, IDisposable
     private readonly RenderProfileElement _subject;
     private readonly ProfileElement _target;
     private bool _isRemoved;
+    private readonly bool _wasEnabled;
 
     /// <summary>
     /// Creates a new instance of the <see cref="RemoveProfileElement"/> class.
@@ -23,7 +24,8 @@ public class RemoveProfileElement : IProfileEditorCommand, IDisposable
 
         _subject = subject;
         _target = _subject.Parent;
-        _index = _subject.Children.IndexOf(_subject);
+        _index = _target.Children.IndexOf(_subject);
+        _wasEnabled = _subject.Enabled;
 
         DisplayName = subject switch
         {
@@ -50,15 +52,17 @@ public class RemoveProfileElement : IProfileEditorCommand, IDisposable
     {
         _isRemoved = true;
         _target.RemoveChild(_subject);
-        _subject.Deactivate();
+        _subject.Disable();
     }
 
     /// <inheritdoc />
     public void Undo()
     {
         _isRemoved = false;
-        _subject.Activate();
         _target.AddChild(_subject, _index);
+
+        if (_wasEnabled)
+            _subject.Enable();
     }
 
     #endregion

src/Avalonia/Artemis.UI/Screens/ProfileEditor/Panels/ProfileTree/ProfileTreeView.axaml

@@ -8,7 +8,7 @@
              x:Class="Artemis.UI.Screens.ProfileEditor.ProfileTree.ProfileTreeView"
              x:DataType="profileTree:ProfileTreeViewModel">
     <Grid RowDefinitions="*,Auto">
-        <TreeView Classes="no-right-margin" Items="{CompiledBinding Children}" SelectedItem="{CompiledBinding SelectedChild}">
+        <TreeView Name="ProfileTreeView" Classes="no-right-margin" Items="{CompiledBinding Children}" SelectedItem="{CompiledBinding SelectedChild}" SelectionChanged="ProfileTreeView_OnSelectionChanged">
             <TreeView.Styles>
                 <Style Selector="TreeViewItem">
                     <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />

src/Avalonia/Artemis.UI/Screens/ProfileEditor/Panels/ProfileTree/ProfileTreeView.axaml.cs

@@ -1,3 +1,5 @@
+using System;
+using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 using Avalonia.ReactiveUI;
 
@@ -5,6 +7,8 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
 {
     public class ProfileTreeView : ReactiveUserControl<ProfileTreeViewModel>
     {
+        private TreeView _treeView;
+
         public ProfileTreeView()
         {
             InitializeComponent();
@@ -13,6 +17,12 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
         private void InitializeComponent()
         {
             AvaloniaXamlLoader.Load(this);
+            _treeView = this.Get<TreeView>("ProfileTreeView");
+        }
+
+        private void ProfileTreeView_OnSelectionChanged(object? sender, SelectionChangedEventArgs e)
+        {
+            _treeView.Focus();
         }
     }
 }

src/Avalonia/Artemis.UI/Screens/ProfileEditor/Panels/ProfileTree/TreeItemViewModel.cs

@@ -162,18 +162,28 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
             Observable.FromEventPattern<ProfileElementEventArgs>(x => ProfileElement.ChildAdded += x, x => ProfileElement.ChildAdded -= x)
                 .Subscribe(c => AddTreeItemIfMissing(c.EventArgs.ProfileElement)).DisposeWith(d);
             Observable.FromEventPattern<ProfileElementEventArgs>(x => ProfileElement.ChildRemoved += x, x => ProfileElement.ChildRemoved -= x)
-                .Subscribe(c => RemoveTreeItemsIfFound(c.EventArgs.ProfileElement)).DisposeWith(d);
+                .Subscribe(c => RemoveTreeItemsIfFound(c.Sender, c.EventArgs.ProfileElement)).DisposeWith(d);
         }
 
-        protected void RemoveTreeItemsIfFound(ProfileElement profileElement)
+        protected void RemoveTreeItemsIfFound(object? sender, ProfileElement profileElement)
         {
             List<TreeItemViewModel> toRemove = Children.Where(t => t.ProfileElement == profileElement).ToList();
             foreach (TreeItemViewModel treeItemViewModel in toRemove)
                 Children.Remove(treeItemViewModel);
 
-            // Deselect the current profile element if removed
-            if (_currentProfileElement == profileElement)
-                _profileEditorService.ChangeCurrentProfileElement(null);
+            if (_currentProfileElement != profileElement)
+                return;
+
+            // Find a good candidate for a new selection, preferring the next sibling, falling back to the previous sibling and finally the parent
+            ProfileElement? parent = sender as ProfileElement;
+            ProfileElement? newSelection = null;
+            if (parent != null)
+            {
+                newSelection = parent.Children.FirstOrDefault(c => c.Order == profileElement.Order) ?? parent.Children.FirstOrDefault(c => c.Order == profileElement.Order - 1);
+                if (newSelection == null && parent is Folder { IsRootFolder: false })
+                    newSelection = parent;
+            }
+            _profileEditorService.ChangeCurrentProfileElement(newSelection as RenderProfileElement);
         }
 
         protected void AddTreeItemIfMissing(ProfileElement profileElement)