static void ImageControlUnloaded(object sender, RoutedEventArgs e)
{
if (!(sender is Image imageControl))
{
return;
}
var source = GetAnimatedSource(imageControl);
if (source != null)
{
AnimationCache.DecrementReferenceCount(source, GetRepeatBehavior(imageControl));
}
var controller = GetAnimationController(imageControl);
controller?.Dispose();
}
private static void AnimatedSourceChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
if (!(o is Image imageControl))
{
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;
AnimationCache.DecrementReferenceCount(oldValue, GetRepeatBehavior(imageControl));
var controller = GetAnimationController(imageControl);
controller?.Dispose();
imageControl.Source = null;
}
if (newValue == null)
{
return;
}
imageControl.Loaded += ImageControlLoaded;
imageControl.Unloaded += ImageControlUnloaded;
if (imageControl.IsLoaded)
{
InitAnimationOrImage(imageControl);
}
}
private static void RepeatBehaviorChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
if (!(o is Image imageControl))
{
return;
}
var source = GetAnimatedSource(imageControl);
if (source == null)
{
return;
}
if (!Equals(e.OldValue, e.NewValue))
{
AnimationCache.DecrementReferenceCount(source, (RepeatBehavior)e.OldValue);
}
if (imageControl.IsLoaded)
{
InitAnimationOrImage(imageControl);
}
}