public Item(string filename, long?size, string url, IRelay relay, ObservableCollection <Item> collection)
{
URL = url;
Filename = Path.GetFileName(filename);
TotalSize = size;
if (File.Exists(filename))
{
using (var icon = Icon.ExtractAssociatedIcon(filename))
using (var bmp = icon.ToBitmap())
FileIcon = Imaging.CreateBitmapSourceFromHBitmap(bmp.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
}
if (relay != null)
{
long lastDownloaded = 0;
double lastLastBps = 0, lastBps = 0, inverseTotal = (TotalSize ?? 0) > 0 ? (100.0 / TotalSize.Value) : 1;
relay.OnProgress += (downloaded, total) =>
{
double bps = downloaded - lastDownloaded;
bps = (bps + (lastBps > 0 ? lastBps : bps) + (lastLastBps > 0 ? lastLastBps : bps)) / 3.0;
lastLastBps = lastBps; lastBps = bps; lastDownloaded = downloaded;
Bps = $"{((long)bps).FormatBytes()}/sec";
Downloaded = downloaded;
Progress = downloaded * inverseTotal;
if (TotalSize.HasValue)
{
Remaining = bps > 0 ? TimeSpan.FromSeconds((TotalSize.Value - downloaded) / bps) : (TimeSpan?)null;
Status = $"{Downloaded.FormatBytes()} of {TotalSize.Value.FormatBytes()} downloaded";
}
else
{
Status = $"{Downloaded.FormatBytes()} downloaded";
}
};
relay.OnStart += () => { Status = "download started.."; IsIndeterminate = !TotalSize.HasValue; };
relay.OnDisconnect += () => { Status = "disconnected, waiting to resume.."; Bps = null; Remaining = null; IsIndeterminate = false; };
}
Cancel = new Command(() => { collection.Remove(this); relay?.Cancel(); });
Copy = new Command(() => Clipboard.SetDataObject(URL, true));
}