ProgressOverlayWindow/ViewModels/ProgressOverlayViewModel.cs - server - dOJer113/Insect

ProgressOverlayWindow/ViewModels/ProgressOverlayViewModel.cs
233 строки6 KB
aleks
lab 5
14 дек 2025, 19:32
14 дек 2025, 19:32395af5a
using System;
using ReactiveUI;

namespace ProgressOverlayWindow.ViewModels;

/// <summary>
/// ViewModel для окна прогресса.
/// </summary>
public class ProgressOverlayViewModel : ReactiveObject
{
  private string _title = "Операция";
  private string _caption = "Подготовка...";
  private string? _subtitle = "Ожидание запуска";
  private double _currentProgress;
  private double _maxProgress = 1;
  private string _actionButtonText = "Отмена";
  private bool _isCompleted;
  private bool _isCancellationAvailable = true;
  private string _footerHint = "Alt+F4 — отмена";

  /// <summary>
  /// Событие запроса отмены.
  /// </summary>
  public event EventHandler? CancelRequested;

  /// <summary>
  /// Событие запроса закрытия.
  /// </summary>
  public event EventHandler? CloseRequested;

  /// <summary>
  /// Команда основной кнопки.
  /// </summary>
  public ActionCommand ActionButtonCommand { get; }

  /// <summary>
  /// Создает ViewModel окна прогресса.
  /// </summary>
  public ProgressOverlayViewModel()
  {
    ActionButtonCommand = new ActionCommand(HandleAction, () => _isCompleted || _isCancellationAvailable);
  }

  /// <summary>
  /// Заголовок окна.
  /// </summary>
  public string Title
  {
    get => _title;
    private set => this.RaiseAndSetIfChanged(ref _title, value);
  }

  /// <summary>
  /// Основная подпись.
  /// </summary>
  public string Caption
  {
    get => _caption;
    private set => this.RaiseAndSetIfChanged(ref _caption, value);
  }

  /// <summary>
  /// Дополнительный подзаголовок.
  /// </summary>
  public string? Subtitle
  {
    get => _subtitle;
    private set => this.RaiseAndSetIfChanged(ref _subtitle, value);
  }

  /// <summary>
  /// Текущее значение прогресса.
  /// </summary>
  public double CurrentProgress
  {
    get => _currentProgress;
    private set
    {
      this.RaiseAndSetIfChanged(ref _currentProgress, value);
      this.RaisePropertyChanged(nameof(ProgressSummary));
    }
  }

  /// <summary>
  /// Максимальное значение прогресса.
  /// </summary>
  public double MaxProgress
  {
    get => _maxProgress;
    private set
    {
      this.RaiseAndSetIfChanged(ref _maxProgress, value);
      this.RaisePropertyChanged(nameof(ProgressSummary));
    }
  }

  /// <summary>
  /// Сводка прогресса в текстовом виде.
  /// </summary>
  public string ProgressSummary => $"{CurrentProgress:N0} / {MaxProgress:N0}";

  /// <summary>
  /// Текст на кнопке действия.
  /// </summary>
  public string ActionButtonText
  {
    get => _actionButtonText;
    private set => this.RaiseAndSetIfChanged(ref _actionButtonText, value);
  }

  /// <summary>
  /// Подсказка в нижней части окна.
  /// </summary>
  public string FooterHint
  {
    get => _footerHint;
    private set => this.RaiseAndSetIfChanged(ref _footerHint, value);
  }

  /// <summary>
  /// Признак завершения операции.
  /// </summary>
  public bool IsCompleted
  {
    get => _isCompleted;
    private set
    {
      this.RaiseAndSetIfChanged(ref _isCompleted, value);
      ActionButtonCommand.RaiseCanExecuteChanged();
      this.RaisePropertyChanged(nameof(IsActionButtonEnabled));
    }
  }

  /// <summary>
  /// Доступность отмены.
  /// </summary>
  public bool IsCancellationAvailable
  {
    get => _isCancellationAvailable;
    private set
    {
      this.RaiseAndSetIfChanged(ref _isCancellationAvailable, value);
      ActionButtonCommand.RaiseCanExecuteChanged();
      this.RaisePropertyChanged(nameof(IsActionButtonEnabled));
    }
  }

  /// <summary>
  /// Признак доступности кнопки действия.
  /// </summary>
  public bool IsActionButtonEnabled => IsCancellationAvailable || IsCompleted;

  /// <summary>
  /// Инициализирует визуальные элементы окна.
  /// </summary>
  public void Initialize(string parTitle, string parCaption, string? parSubtitle, double parMaxProgress)
  {
    Title = parTitle;
    Caption = parCaption;
    Subtitle = parSubtitle;
    MaxProgress = Math.Max(parMaxProgress, 1);
    CurrentProgress = 0;
    ActionButtonText = "Отмена";
    IsCompleted = false;
    IsCancellationAvailable = true;
  }

  /// <summary>
  /// Обновляет значения прогресса и подпись.
  /// </summary>
  public void UpdateProgress(double parStep, string? parSubtitle)
  {
    CurrentProgress = Math.Min(MaxProgress, CurrentProgress + parStep);
    if (!string.IsNullOrWhiteSpace(parSubtitle))
    {
      Subtitle = parSubtitle;
    }
  }

  /// <summary>
  /// Блокирует кнопку отмены.
  /// </summary>
  public void DisableCancellation()
  {
    IsCancellationAvailable = false;
  }

  /// <summary>
  /// Переключает окно в состояние завершения.
  /// </summary>
  public void SwitchToCompletionState()
  {
    IsCompleted = true;
    IsCancellationAvailable = true;
    ActionButtonText = "Закрыть";
    FooterHint = "Готово";
  }

  /// <summary>
  /// Возвращает кнопку в исходное состояние.
  /// </summary>
  public void ResetButtonState()
  {
    IsCompleted = false;
    IsCancellationAvailable = true;
    ActionButtonText = "Отмена";
    FooterHint = "Alt+F4 — отмена";
  }

  /// <summary>
  /// Обновляет текст подзаголовка.
  /// </summary>
  /// <param name="parSubtitle">Новый текст подзаголовка.</param>
  public void UpdateSubtitle(string parSubtitle)
  {
    Subtitle = parSubtitle;
  }

  private void HandleAction()
  {
    if (IsCompleted)
    {
      CloseRequested?.Invoke(this, EventArgs.Empty);
      return;
    }

    if (IsCancellationAvailable)
    {
      IsCancellationAvailable = false;
      CancelRequested?.Invoke(this, EventArgs.Empty);
    }
  }
}