StarterNG/StarterNG/Controls/SettingsSection.cs

using System;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Primitives;

namespace StarterNG.Controls;

public class SettingsSection : HeaderedContentControl
{
    public static readonly StyledProperty<object?> ToggleProperty =
        AvaloniaProperty.Register<SettingsSection, object?>(nameof(Toggle));

    public static readonly StyledProperty<string?> ToggleKeyProperty =
        AvaloniaProperty.Register<SettingsSection, string?>(nameof(ToggleKey));

    public static readonly StyledProperty<string?> ResetLabelProperty =
        AvaloniaProperty.Register<SettingsSection, string?>(nameof(ResetLabel));

    public static readonly StyledProperty<object?> LevelProperty =
        AvaloniaProperty.Register<SettingsSection, object?>(nameof(Level));

    private Button? _reset;

    /// <summary>The header's choice of a level of detail for this section alone; none where it has no such thing.</summary>
    public object? Level
    {
        get => GetValue(LevelProperty);
        set => SetValue(LevelProperty, value);
    }

    public object? Toggle
    {
        get => GetValue(ToggleProperty);
        set => SetValue(ToggleProperty, value);
    }

    /// <summary>The eu07.ini key the header's switch sets.</summary>
    public string? ToggleKey
    {
        get => GetValue(ToggleKeyProperty);
        set => SetValue(ToggleKeyProperty, value);
    }

    /// <summary>The words on the header's button that puts the section back as the simulator has it; none, no button.</summary>
    public string? ResetLabel
    {
        get => GetValue(ResetLabelProperty);
        set => SetValue(ResetLabelProperty, value);
    }

    /// <summary>Raised when the header's reset button is pressed.</summary>
    public event Action<SettingsSection>? ResetRequested;

    protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
    {
        base.OnApplyTemplate(e);
        if (_reset is not null)
            _reset.Click -= OnResetClick;
        _reset = e.NameScope.Find<Button>("PART_Reset");
        if (_reset is not null)
            _reset.Click += OnResetClick;
    }

    private void OnResetClick(object? sender, Avalonia.Interactivity.RoutedEventArgs e) => ResetRequested?.Invoke(this);
}