/// <summary>
/// 属性更改处理事件
/// </summary>
private static void OnSourcePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
ThumbnailImage img = sender as ThumbnailImage;
if (img == null)
{
return;
}
if (!img.IsLoaded)
{
return;
}
BindSource(img);
}
private static void BindSource(ThumbnailImage image)
{
var w = image.Width;
var h = image.Height;
object source = image.ThumbnailSource;
//bind
if (image.AsyncEnable)
{
BindThumbnialAync(image, source, w, h);
}
else
{
BindThumbnial(image, source, w, h);
}
}
/// <summary>
/// 异步线程池绑定缩略图
/// </summary>
private static void BindThumbnialAync(ThumbnailImage image, object fileSource, double w, double h)
{
IThumbnailProvider thumbnailProvider = ThumbnailProviderFactory.GetInstance(image.ThumbnailType);
var cache = image.CacheEnable;
var time = image.CacheTime;
System.Utility.Executer.TryRunByThreadPool(() =>
{
ImageSource img = null;
if (cache)
{
img = CacheManager.GetCache <ImageSource>(fileSource.GetHashCode().ToString(), time, () =>
{
return(thumbnailProvider.GenereateThumbnail(fileSource, w, h));
});
}
else
{
img = thumbnailProvider.GenereateThumbnail(fileSource, w, h);
}
image.Dispatcher.BeginInvoke(new Action(() => { image.Source = img; }), DispatcherPriority.ApplicationIdle);
});
}