Refactor MainWindowViewModel: Split into multiple partial classes to improve maintainability and organization.

Author: voytas

src/Spectron/Spectron.csproj

@@ -45,10 +45,4 @@
       <ProjectReference Include="..\Spectron.Emulation\Spectron.Emulation.csproj" />
       <ProjectReference Include="..\Spectron.Recorder\Spectron.Recorder.csproj" />
     </ItemGroup>
-
-    <ItemGroup>
-      <Compile Update="ViewModels\MainWindowViewModel.Handlers.cs">
-        <DependentUpon>MainWindowViewModel.cs</DependentUpon>
-      </Compile>
-    </ItemGroup>
 </Project>

src/Spectron/ViewModels/MainWindowViewModel.Dialogs.cs

@@ -0,0 +1,122 @@
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.Messaging;
+using Microsoft.Extensions.Logging;
+using OldBit.Spectron.Debugger.ViewModels;
+using OldBit.Spectron.Extensions;
+using OldBit.Spectron.Messages;
+using OldBit.Spectron.Theming;
+
+namespace OldBit.Spectron.ViewModels;
+
+partial class MainWindowViewModel
+{
+    public async Task OpenPreferencesWindow()
+    {
+        var resumeAfter = false;
+
+        if (!IsPaused)
+        {
+            Pause();
+            resumeAfter = true;
+        }
+
+        var preferences = await WeakReferenceMessenger.Default.Send(new ShowPreferencesViewMessage(_preferences, _gamepadManager));
+
+        ThemeManager.SelectTheme(preferences?.Theme ?? _preferences.Theme);
+
+        if (preferences != null)
+        {
+            _preferences = preferences;
+
+            IsUlaPlusEnabled = preferences.IsUlaPlusEnabled;
+            Emulator.SetUlaPlus(IsUlaPlusEnabled);
+
+            TapeLoadSpeed = preferences.Tape.LoadSpeed;
+            Emulator.SetTapeSettings(_preferences.Tape);
+
+            IsTimeMachineEnabled = preferences.TimeMachine.IsEnabled;
+            _timeMachine.SnapshotInterval = preferences.TimeMachine.SnapshotInterval;
+            _timeMachine.MaxDuration = preferences.TimeMachine.MaxDuration;
+            TimeMachineCountdownSeconds = preferences.TimeMachine.CountdownSeconds;
+
+            JoystickType = preferences.Joystick.JoystickType;
+            MouseType = preferences.Mouse.MouseType;
+            SetMouseCursor();
+
+            ConfigureEmulatorSettings();
+        }
+
+        if (resumeAfter)
+        {
+            Resume();
+        }
+    }
+
+    private async Task OpenTimeMachineWindow()
+    {
+        if (!_preferences.TimeMachine.IsEnabled || _isTimeMachineOpen)
+        {
+            return;
+        }
+
+        if (!IsPaused)
+        {
+            Pause();
+        }
+
+        _isTimeMachineOpen = true;
+
+        var viewModel = new TimeMachineViewModel(_timeMachine, Emulator!.JoystickManager, Emulator.CommandManager, _logger);
+
+        var entry = await WeakReferenceMessenger.Default.Send(new ShowTimeMachineViewMessage(viewModel));
+
+        if (entry != null)
+        {
+            var snapshot = entry.GetSnapshot();
+
+            if (snapshot == null)
+            {
+                _logger.LogError("Failed to get snapshot from time machine entry");
+                return;
+            }
+
+            IsTimeMachineCountdownVisible = true;
+
+            CreateEmulator(snapshot);
+        }
+
+        _isTimeMachineOpen = false;
+
+        if (!IsTimeMachineCountdownVisible)
+        {
+            Resume();
+        }
+    }
+
+    private static void OpenAboutWindow() =>
+        WeakReferenceMessenger.Default.Send(new ShowAboutViewMessage());
+
+    private static void ShowKeyboardHelpWindow() =>
+        WeakReferenceMessenger.Default.Send(new ShowKeyboardViewMessage());
+
+    private void OpenScreenshotViewer() =>
+        WeakReferenceMessenger.Default.Send(new ShowScreenshotViewMessage(_screenshotViewModel));
+
+    private void OpenTrainersWindow() =>
+        WeakReferenceMessenger.Default.Send(new ShowTrainerViewMessage(Emulator!, _pokeFile));
+
+    private void OpenPrintOutputViewer() =>
+        WeakReferenceMessenger.Default.Send(new ShowPrintOutputViewMessage(Emulator!.Printer));
+
+    private void OpenDebuggerWindow()
+    {
+        _debuggerViewModel = new DebuggerViewModel(_debuggerContext, Emulator!, _preferences.Debugger);
+
+        if (!IsPaused)
+        {
+            Pause(showOverlay: false);
+        }
+
+        WeakReferenceMessenger.Default.Send(new ShowDebuggerViewMessage(_debuggerViewModel));
+    }
+}

src/Spectron/ViewModels/MainWindowViewModel.Display.cs

@@ -0,0 +1,18 @@
+using Avalonia.Controls;
+using OldBit.Spectron.Screen;
+
+namespace OldBit.Spectron.ViewModels;
+
+partial class MainWindowViewModel
+{
+    private void HandleChangeBorderSize(BorderSize borderSize)
+    {
+        BorderSize = borderSize;
+
+        _frameBufferConverter.SetBorderSize(borderSize);
+        SpectrumScreen = _frameBufferConverter.ScreenBitmap;
+    }
+
+    private void HandleToggleFullScreen() =>
+        WindowState = WindowState == WindowState.FullScreen ? WindowState.Normal : WindowState.FullScreen;
+}