annotations/Azaion.Annotator/DTO/ThumbnailDto.cs

using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Windows.Media.Imaging;
using Azaion.Annotator.Extensions;

namespace Azaion.Annotator.DTO;

public class ThumbnailDto : INotifyPropertyChanged
{
    public string ThumbnailPath { get; set; }
    public string ImagePath { get; set; }
    public string LabelPath { get; set; }

    private BitmapImage? _image;
    public BitmapImage? Image
    {
        get
        {
            if (_image == null)
                Task.Run(async () => Image = await ThumbnailPath.OpenImage());
            return _image;
        }
        set
        {
            _image = value;
            OnPropertyChanged();
        }
    }

    public void UpdateImage() => _image = null;

    public event PropertyChangedEventHandler? PropertyChanged;
    protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}