private static async Task InitAnimationOrImage(Image imageControl)
{
var controller = GetAnimationController(imageControl);
if (controller != null)
{
controller.Dispose();
}
SetAnimationController(imageControl, null);
SetIsAnimationLoaded(imageControl, false);
BitmapSource source = GetAnimatedSource(imageControl) as BitmapSource;
bool isInDesignMode = DesignerProperties.GetIsInDesignMode(imageControl);
bool animateInDesignMode = GetAnimateInDesignMode(imageControl);
bool shouldAnimate = !isInDesignMode || animateInDesignMode;
// For a BitmapImage with a relative UriSource, the loading is deferred until
// BaseUri is set. This method will be called again when BaseUri is set.
bool isLoadingDeferred = IsLoadingDeferred(source);
if (source != null && shouldAnimate && !isLoadingDeferred)
{
// Case of image being downloaded: retry after download is complete
if (source.IsDownloading)
{
EventHandler handler = null;
handler = async(sender, args) =>
{
source.DownloadCompleted -= handler;
await InitAnimationOrImage(imageControl);
};
source.DownloadCompleted += handler;
imageControl.Source = source;
return;
}
var animation = await GetAnimation(imageControl, source);
if (animation != null)
{
if (animation.KeyFrames.Count > 0)
{
// For some reason, it sometimes throws an exception the first time... the second time it works.
TryTwice(() => imageControl.Source = (ImageSource)animation.KeyFrames[0].Value);
}
else
{
imageControl.Source = source;
}
controller = new ImageAnimationController(imageControl, animation, GetAutoStart(imageControl));
SetAnimationController(imageControl, controller);
SetIsAnimationLoaded(imageControl, true);
imageControl.RaiseEvent(new RoutedEventArgs(AnimationLoadedEvent, imageControl));
return;
}
}
imageControl.Source = source;
if (source != null)
{
SetIsAnimationLoaded(imageControl, true);
imageControl.RaiseEvent(new RoutedEventArgs(AnimationLoadedEvent, imageControl));
}
}
private static void SetAnimationController(DependencyObject obj, ImageAnimationController value)
{
obj.SetValue(AnimationControllerPropertyKey, value);
}