private static void AnimatedSourceChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
Image imageControl = o as Image;
if (imageControl == null)
{
return;
}
var oldValue = e.OldValue as ImageSource;
var newValue = e.NewValue as ImageSource;
if (ReferenceEquals(oldValue, newValue))
{
if (imageControl.IsLoaded)
{
var isAnimLoaded = GetIsAnimationLoaded(imageControl);
if (!isAnimLoaded)
{
InitAnimationOrImage(imageControl);
}
}
return;
}
if (oldValue != null)
{
imageControl.Loaded -= ImageControlLoaded;
imageControl.Unloaded -= ImageControlUnloaded;
imageControl.IsVisibleChanged -= VisibilityChanged;
AnimationCache.RemoveControlForSource(oldValue, imageControl);
var controller = GetAnimationController(imageControl);
if (controller != null)
{
controller.Dispose();
}
imageControl.Source = null;
}
if (newValue != null)
{
imageControl.Loaded += ImageControlLoaded;
imageControl.Unloaded += ImageControlUnloaded;
imageControl.IsVisibleChanged += VisibilityChanged;
if (imageControl.IsLoaded)
{
InitAnimationOrImage(imageControl);
}
}
}
static void ImageControlUnloaded(object sender, RoutedEventArgs e)
{
Image imageControl = sender as Image;
if (imageControl == null)
{
return;
}
var source = GetAnimatedSource(imageControl);
if (source != null)
{
AnimationCache.RemoveControlForSource(source, imageControl);
}
var controller = GetAnimationController(imageControl);
if (controller != null)
{
controller.Dispose();
}
}