91 lines
2.5 KiB
C#
91 lines
2.5 KiB
C#
using Avalonia.Controls;
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using Avalonia.Input;
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using Avalonia.Interactivity;
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using Avalonia.Media.Imaging;
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using Avalonia.Threading;
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using Harmonia.Core.Caching;
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using Harmonia.Core.Imaging;
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using Harmonia.Core.Playlists;
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using Harmonia.UI.ViewModels;
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using Microsoft.Extensions.Caching.Memory;
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using System;
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using System.Collections.Concurrent;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Harmonia.UI.Views;
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public partial class PlaylistView : UserControl
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{
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private readonly PlaylistViewModel _viewModel;
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private readonly ConcurrentDictionary<int, CancellationTokenSource> _imageCancellationTokens = [];
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public PlaylistView()
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{
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InitializeComponent();
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_viewModel = (PlaylistViewModel)DataContext!;
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}
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private void ListBox_DoubleTapped(object? sender, TappedEventArgs e)
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{
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if (sender is ListBox listBox && listBox.SelectedItem is PlaylistSong playlistSong)
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{
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_viewModel.PlaySong(playlistSong);
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}
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}
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private void Image_Loaded(object? sender, RoutedEventArgs e)
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{
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if (sender is not Image image)
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return;
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if (image.DataContext is not PlaylistSong playlistSong)
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return;
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Task.Run(() => DoSomethingAsync(image, playlistSong));
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}
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private async Task DoSomethingAsync(Image image, PlaylistSong playlistSong)
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{
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int hashCode = image.GetHashCode();
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_imageCancellationTokens.TryGetValue(hashCode, out CancellationTokenSource? cancellationTokenSource);
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cancellationTokenSource?.Cancel();
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cancellationTokenSource = new();
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Bitmap? bitmap = await _viewModel.GetBitmapAsync(playlistSong, cancellationTokenSource.Token);
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if (bitmap == null)
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return;
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await Dispatcher.UIThread.InvokeAsync(() => SetSongImageSource(image, bitmap));
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}
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private static void SetSongImageSource(Image image, Bitmap bitmap)
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{
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image.Source = bitmap;
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}
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private void Image_Unloaded(object? sender, RoutedEventArgs e)
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{
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if (sender is not Image image)
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return;
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if (image.DataContext is not PlaylistSong playlistSong)
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return;
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if (image.Source is Bitmap bitmap)
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{
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bitmap.Dispose();
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}
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image.Source = null;
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int hashCode = image.GetHashCode();
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_imageCancellationTokens.TryGetValue(hashCode, out CancellationTokenSource? cancellationTokenSource);
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cancellationTokenSource?.Cancel();
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}
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} |