public Task ShowThumbnailAsync(PostClass post)
{
this.CancelAsync();
this.scrollBar.Enabled = false;
this.cancelTokenSource = new CancellationTokenSource();
var cancelToken = this.cancelTokenSource.Token;
this.task = Task.Factory.StartNew(() => ThumbnailGenerator.GetThumbnails(post), cancelToken)
.ContinueWith( /* await使いたい */
t =>
{
var thumbnails = t.Result;
this.SetThumbnailCount(thumbnails.Count);
if (thumbnails.Count == 0)
{
return;
}
for (int i = 0; i < thumbnails.Count; i++)
{
var thumb = thumbnails[i];
var picbox = this.pictureBox[i];
picbox.Tag = thumb;
picbox.LoadAsync(thumb.ThumbnailUrl);
var tooltipText = thumb.TooltipText;
if (!string.IsNullOrEmpty(tooltipText))
{
this.toolTip.SetToolTip(picbox, tooltipText);
}
cancelToken.ThrowIfCancellationRequested();
}
this.pictureBox[0].Visible = true;
this.scrollBar.Maximum = thumbnails.Count - 1;
if (thumbnails.Count > 1)
{
this.scrollBar.Enabled = true;
}
if (this.ThumbnailLoading != null)
{
this.ThumbnailLoading(this, new EventArgs());
}
},
cancelToken,
TaskContinuationOptions.OnlyOnRanToCompletion,
TaskScheduler.FromCurrentSynchronizationContext()
);
return(this.task);
}
protected virtual List <ThumbnailInfo> GetThumbailInfo(PostClass post)
{
return(ThumbnailGenerator.GetThumbnails(post));
}