85 lines
2.3 KiB
C#
85 lines
2.3 KiB
C#
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using System;
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using System.Collections.ObjectModel;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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namespace PCL.Core.App.Tasks;
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/// <summary>
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/// 可观察的任务模型<br/>
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/// <b>NOTE</b>: 请勿自行修改任何 observable 属性
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/// </summary>
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public partial class TaskModel : ObservableObject
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{
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/// <summary>
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/// 任务标题
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/// </summary>
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public required string Title { get; init; }
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/// <summary>
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/// 任务是否支持进度
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/// </summary>
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public required bool SupportProgress { get; init; }
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/// <summary>
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/// 任务当前状态
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/// </summary>
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[ObservableProperty] private TaskState _state = TaskState.Waiting;
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/// <summary>
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/// 任务当前状态信息
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/// </summary>
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[ObservableProperty] private string _stateMessage = string.Empty;
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/// <summary>
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/// 任务当前进度，<see cref="SupportProgress"/> 为 <see langword="true"/> 时有效
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/// </summary>
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[ObservableProperty] private double _progress = 0.0;
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private static readonly Action _EmptyAction = (static () => {});
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/// <summary>
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/// 取消任务时触发的事件，值为 <see langword="null"/> 表示不支持取消
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/// </summary>
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public required Action? OnCancel { private get; init; }
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/// <summary>
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/// 取消任务命令
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/// </summary>
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public RelayCommand Cancel
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{
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get => field ??= new RelayCommand(OnCancel ?? _EmptyAction, () => OnCancel is not null);
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} = null!;
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/// <summary>
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/// 暂停任务时触发的事件，值为 <see langword="null"/> 表示不支持暂停
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/// </summary>
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public required Action? OnPause { private get; init; }
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/// <summary>
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/// 暂停任务命令
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/// </summary>
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public RelayCommand Pause
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{
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get => field ??= new RelayCommand(OnPause ?? _EmptyAction, () => OnPause is not null);
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} = null!;
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/// <summary>
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/// 任务是否为任务组，即是否存在子任务
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/// </summary>
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[ObservableProperty] private bool _isGroup;
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/// <summary>
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/// 子任务模型
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/// </summary>
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public ObservableCollection<TaskModel> Children { get; } = [];
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public TaskModel()
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{
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Children.CollectionChanged += (sender, _) =>
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{
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if (sender is ObservableCollection<TaskModel> c) IsGroup = c.Count > 0;
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};
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}
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}
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