maui-linux-samples/TodoApp/TodoItem.cs

// TodoItem - Data model for a todo item

using System.ComponentModel;

namespace TodoApp;

public class TodoItem : INotifyPropertyChanged
{
    private string _title = "";
    private string _notes = "";
    private bool _isCompleted;
    private DateTime _dueDate;

    public int Id { get; set; }

    /// <summary>
    /// Index in the collection for alternating row colors.
    /// </summary>
    public int Index { get; set; }

    public string Title
    {
        get => _title;
        set
        {
            if (_title != value)
            {
                _title = value;
                OnPropertyChanged(nameof(Title));
            }
        }
    }

    public string Notes
    {
        get => _notes;
        set
        {
            if (_notes != value)
            {
                _notes = value;
                OnPropertyChanged(nameof(Notes));
            }
        }
    }

    public bool IsCompleted
    {
        get => _isCompleted;
        set
        {
            if (_isCompleted != value)
            {
                _isCompleted = value;
                OnPropertyChanged(nameof(IsCompleted));
            }
        }
    }

    public DateTime DueDate
    {
        get => _dueDate;
        set
        {
            if (_dueDate != value)
            {
                _dueDate = value;
                OnPropertyChanged(nameof(DueDate));
            }
        }
    }

    public DateTime CreatedAt { get; set; } = DateTime.Now;

    public event PropertyChangedEventHandler? PropertyChanged;

    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    /// <summary>
    /// Forces all bindings to re-evaluate by notifying all properties changed.
    /// Used when external factors (like app theme) change.
    /// </summary>
    public void RefreshBindings()
    {
        OnPropertyChanged(nameof(IsCompleted));
        OnPropertyChanged(nameof(Title));
        OnPropertyChanged(nameof(Notes));
    }
}