MyAvaloniaDemo/AuroraDesk.Presentation/Views/Pages/UdpServerPageView.axaml.cs

using ReactiveUI.Avalonia;
using Avalonia.Markup.Xaml;
using Avalonia.Controls;
using AuroraDesk.Presentation.ViewModels.Pages;
using HeroIconsAvalonia.Controls;
using ReactiveUI;
using HeroIconsAvalonia.Enums;

namespace AuroraDesk.Presentation.Views.Pages;

public partial class UdpServerPageView : ReactiveUserControl<UdpServerPageViewModel>
{
    private Button? _toggleButton;
    private HeroIcon? _toggleIcon;
    private Expander? _clientListExpander;

    public UdpServerPageView()
    {
        InitializeComponent();
        this.WhenActivated(disposables =>
        {
            // 查找控件
            _toggleButton = this.FindControl<Button>("ToggleButton");
            _toggleIcon = this.FindControl<HeroIcon>("ToggleIcon");
            _clientListExpander = this.FindControl<Expander>("ClientListExpander");

            if (_toggleButton != null && _clientListExpander != null)
            {
                // 绑定点击事件
                _toggleButton.Click += (s, e) =>
                {
                    if (_clientListExpander != null)
                    {
                        _clientListExpander.IsExpanded = !_clientListExpander.IsExpanded;
                        UpdateToggleIcon();
                    }
                };

                // 监听 Expander 状态变化
                _clientListExpander.PropertyChanged += (s, e) =>
                {
                    if (e.Property.Name == nameof(Expander.IsExpanded))
                    {
                        UpdateToggleIcon();
                    }
                };

                // 初始化图标状态
                UpdateToggleIcon();
            }
        });
    }

    private void UpdateToggleIcon()
    {
        if (_toggleIcon != null && _clientListExpander != null)
        {
            _toggleIcon.Type = _clientListExpander.IsExpanded 
                ? IconType.ChevronDown 
                : IconType.ChevronRight;
        }
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }
}