private static void AnimatedSourceChanged(
DependencyObject o,
DependencyPropertyChangedEventArgs e)
{
if (!(o is Image imageControl))
{
return;
}
ImageSource oldValue = e.OldValue as ImageSource;
ImageSource newValue = e.NewValue as ImageSource;
if (oldValue == newValue)
{
return;
}
if (oldValue != null)
{
imageControl.Loaded -= new RoutedEventHandler(ImageBehavior.ImageControlLoaded);
imageControl.Unloaded -= new RoutedEventHandler(ImageBehavior.ImageControlUnloaded);
AnimationCache.DecrementReferenceCount(oldValue, ImageBehavior.GetRepeatBehavior(imageControl));
ImageBehavior.GetAnimationController(imageControl)?.Dispose();
imageControl.Source = (ImageSource)null;
}
if (newValue == null)
{
return;
}
imageControl.Loaded += new RoutedEventHandler(ImageBehavior.ImageControlLoaded);
imageControl.Unloaded += new RoutedEventHandler(ImageBehavior.ImageControlUnloaded);
if (!imageControl.IsLoaded)
{
return;
}
ImageBehavior.InitAnimationOrImage(imageControl);
}
private static void ImageControlUnloaded(object sender, RoutedEventArgs e)
{
if (!(sender is Image imageControl))
{
return;
}
ImageSource animatedSource = ImageBehavior.GetAnimatedSource(imageControl);
if (animatedSource != null)
{
AnimationCache.DecrementReferenceCount(animatedSource, ImageBehavior.GetRepeatBehavior(imageControl));
}
ImageBehavior.GetAnimationController(imageControl)?.Dispose();
}