using System;
using DispenserCommon.Events;
using ReactiveUI;

namespace DispenserUI.ViewModels;

/// <summary>
///     可用于动态的切换页面是否显示的view model
/// </summary>
public abstract class DynamicViewModel : ViewModelBase
{
    private bool _visible;

    protected DynamicViewModel(EventType type = EventType.PageChanged)
    {
        EventBus<Type>.AddEventHandler(type, WhenPageChanged);
    }

    /// <summary>
    ///     动态控制是否显示
    /// </summary>
    public bool Visible
    {
        get => _visible;
        set
        {
            _visible = value;
            this.RaisePropertyChanged();
        }
    }

    public virtual void WhenPageChanged(EventType type, Type data)
    {
        var me = GetType();
        // 默认是当前是当前的data为当前ViewModel的类型
        Visible = data == me;
    }
}