public override BitmapSource GetBitmap()
{
if (_imageFiles == null)
{
_imageFiles = GetImagesFromDirectory();
_imageFilesPath = _imageFiles.GetEnumerator();
_imageFilesPath.MoveNext();
_timer.Restart();
}
var current = _imageFilesPath?.Current;
if (string.IsNullOrEmpty(current))
{
return(null);
}
var bitmap = new BitmapImage();
var fileInfo = new FileInfo(current);
if (fileInfo.Exists)
{
bitmap.BeginInit();
bitmap.CacheOption = BitmapCacheOption.OnLoad;
bitmap.CreateOptions = BitmapCreateOptions.None;
bitmap.UriSource = new Uri(current, UriKind.RelativeOrAbsolute);
bitmap.EndInit();
bitmap.Freeze();
}
else
{
OnSettingChanged(null, null);
return(GetBitmap());
}
BitmapSource ret_bitmap = bitmap;
if (Setting.ImageStretch == ImageStretch.None)
{
bitmap = Utils.EnsureMaxWidthHeight(bitmap, Setting.MaxWidth, Setting.MaxHeight);
if (bitmap.Width != bitmap.PixelWidth || bitmap.Height != bitmap.PixelHeight)
{
ret_bitmap = Utils.ConvertToDpi96(bitmap);
}
}
if (Setting.SoftEdgeX > 0 || Setting.SoftEdgeY > 0)
{
ret_bitmap = Utils.SoftenEdges(ret_bitmap, Setting.SoftEdgeX, Setting.SoftEdgeY);
}
return(ret_bitmap);
}
protected override void OnSettingChanged(object sender, EventArgs e)
{
if (_timer != null)
{
_timer.Stop();
_timer.Elapsed -= OnTimerElapsed;
_timer.Dispose();
}
_timer = new PausableTimer(Setting.UpdateImageInterval.TotalMilliseconds);
_timer.Elapsed += OnTimerElapsed;
if ((sender as Setting)?.ImageBackgroundType != ImageBackgroundType.Slideshow)
{
_timer.Stop();
}
else
{
_imageFiles = GetImagesFromDirectory();
_imageFilesPath = _imageFiles.GetEnumerator();
ChangeImage();
_timer.Restart();
}
}
private void ChangeImage()
{
if (Setting.ImageBackgroundType != ImageBackgroundType.WebApi)
{
return;
}
if (_timer.IsPaused)
{
return;
}
Task.Run(async() =>
{
using (var client = new WebClient())
{
try
{
var endpointResult = await client.DownloadStringTaskAsync(new Uri(Setting.WebApiEndpoint));
var reader = new JsonTextReader(new StringReader(endpointResult));
while (reader.Read())
{
if (reader.Value != null && reader.TokenType == JsonToken.PropertyName &&
reader.Value.ToString().Equals(Setting.WebApiJsonKey))
{
var imageUrl = reader.ReadAsString();
Image = await ImageDownloader.LoadImage(imageUrl, Setting.ImageStretch, Setting.MaxWidth, Setting.MaxHeight);
_timer.Restart();
FireImageAvailable();
return;
}
}
}
catch {}
}
});
}