Keyboard panel handling WIP

src/GuiApp/Avalonia/FileTime.GuiApp.CustomImpl/ViewModels/GuiAppState.cs

@@ -1,18 +1,24 @@
 using System.Collections.ObjectModel;
+using System.Reactive.Linq;
+using System.Reactive.Subjects;
 using FileTime.App.Core.ViewModels;
 using FileTime.App.Core.ViewModels.Timeline;
 using FileTime.Core.Models;
 using FileTime.GuiApp.Configuration;
+using FileTime.GuiApp.Models;
 using FileTime.GuiApp.ViewModels;
 using MvvmGen;
 
 namespace FileTime.GuiApp.CustomImpl.ViewModels;
 
 [ViewModel(GenerateConstructor = false)]
-public partial class GuiAppState : AppStateBase, IGuiAppState
+public partial class GuiAppState : AppStateBase, IGuiAppState, IDisposable
 {
+    private readonly BehaviorSubject<GuiPanel> _activePanel = new(GuiPanel.FileBrowser);
+
     public GuiAppState(ITimelineViewModel timelineViewModel) : base(timelineViewModel)
     {
+        ActivePanel = _activePanel.AsObservable();
     }
 
     [Property] private bool _isAllShortcutVisible;
@@ -27,4 +33,14 @@ public partial class GuiAppState : AppStateBase, IGuiAppState
 
     public List<KeyConfig> PreviousKeys { get; } = new();
     public ObservableCollection<string> PopupTexts { get; } = new();
-}
+
+    public IObservable<GuiPanel> ActivePanel { get; }
+
+    public void SetActivePanel(GuiPanel newPanel)
+        => _activePanel.OnNext(newPanel);
+
+    public void Dispose()
+    {
+        _activePanel.Dispose();
+    }
+}