Add options menu persistence

Zennysoft.Game.Ma/src/options/OptionsMenu.cs

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+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
+using Chickensoft.Serialization;
+using Godot;
+
+namespace Zennysoft.Game.Ma;
+
+[Meta(typeof(IAutoNode))]
+public partial class OptionsMenu : Control
+{
+  public override void _Notification(int what) => this.Notify(what);
+
+  [Node] public OptionButton ResolutionOptions { get; set; }
+
+  [Node] public HSlider MasterVolumeSlider { get; set; }
+  [Node] public HSlider MusicVolumeSlider { get; set; }
+  [Node] public HSlider SFXVolumeSlider { get; set; }
+  [Node] public Button SaveAndExitButton { get; set; }
+
+  public OptionsData OptionsData;
+
+  private int _masterBusIndex;
+  private int _musicBusIndex;
+  private int _sfxBusIndex;
+
+  private readonly DisplayServer.WindowMode[] _windowModes = [DisplayServer.WindowMode.Windowed, DisplayServer.WindowMode.Maximized, DisplayServer.WindowMode.Fullscreen, DisplayServer.WindowMode.ExclusiveFullscreen];
+
+  [Signal] public delegate void OptionsMenuExitedEventHandler();
+
+  public void OnReady()
+  {
+    ResolutionOptions.AddItem("Windowed");
+    ResolutionOptions.AddItem("Maximized");
+    ResolutionOptions.AddItem("Fullscreen");
+    ResolutionOptions.AddItem("Exclusive Fullscreen");
+    ResolutionOptions.Select(0);
+
+    OptionsData = new OptionsData()
+    {
+      MasterVolumeLevel = MasterVolumeSlider.Value,
+      MusicVolumeLevel = MusicVolumeSlider.Value,
+      SFXVolumeLevel = SFXVolumeSlider.Value,
+      ScreenResolution = ResolutionOptions.GetSelectedId()
+    };
+    MasterVolumeSlider.ValueChanged += MasterVolumeSlider_Changed;
+    MusicVolumeSlider.ValueChanged += MusicVolumeSlider_Changed;
+    SFXVolumeSlider.ValueChanged += SFXVolumeSlider_Changed;
+
+    ResolutionOptions.ItemSelected += ResolutionOptions_ItemSelected;
+
+    SaveAndExitButton.ButtonUp += SaveAndExitButton_ButtonUp;
+
+    _masterBusIndex = AudioServer.GetBusIndex("Master");
+    _musicBusIndex = AudioServer.GetBusIndex("MUSIC");
+    _sfxBusIndex = AudioServer.GetBusIndex("SFX");
+  }
+
+  private void ResolutionOptions_ItemSelected(long index)
+  {
+    var resolutionIndex = ResolutionOptions.GetSelectedId();
+    OptionsData.ScreenResolution = resolutionIndex;
+    DisplayServer.WindowSetMode(_windowModes[resolutionIndex]);
+  }
+
+  public void Load(OptionsData optionsData)
+  {
+    MasterVolumeSlider.Value = optionsData.MasterVolumeLevel;
+    MusicVolumeSlider.Value = optionsData.MusicVolumeLevel;
+    SFXVolumeSlider.Value = optionsData.SFXVolumeLevel;
+    ResolutionOptions.Select(optionsData.ScreenResolution);
+    DisplayServer.WindowSetMode(_windowModes[optionsData.ScreenResolution]);
+  }
+
+  private void SaveAndExitButton_ButtonUp() => EmitSignal(SignalName.OptionsMenuExited);
+
+  private void MasterVolumeSlider_Changed(double valueChanged)
+  {
+    OptionsData.MasterVolumeLevel = valueChanged;
+    AudioServer.SetBusVolumeDb(_masterBusIndex, Mathf.LinearToDb((float)valueChanged));
+  }
+
+  private void MusicVolumeSlider_Changed(double valueChanged)
+  {
+    OptionsData.MusicVolumeLevel = valueChanged;
+    AudioServer.SetBusVolumeDb(_musicBusIndex, Mathf.LinearToDb((float)valueChanged));
+  }
+
+  private void SFXVolumeSlider_Changed(double valueChanged)
+  {
+    OptionsData.SFXVolumeLevel = valueChanged;
+    AudioServer.SetBusVolumeDb(_sfxBusIndex, Mathf.LinearToDb((float)valueChanged));
+  }
+}
+
+[Meta, Id("options_data")]
+public partial class OptionsData : Node
+{
+  [Save("MasterVolume")]
+  public required double MasterVolumeLevel { get; set; }
+
+  [Save("MusicVolume")]
+  public required double MusicVolumeLevel { get; set; }
+
+  [Save("SFXVolume")]
+  public required double SFXVolumeLevel { get; set; }
+
+  [Save("ScreenResolution")]
+  public required int ScreenResolution { get; set; }
+}