private void ElementOnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
switch (e.PropertyName)
{
case "Renderer":
var element = Element;
if (element == null)
{
return;
}
//We want our handlers after the renderer, so re-register
UnregisterHandlers(element);
RegisterHandlers(element);
_handler?.Attach(this);
break;
default:
if (!ShouldTransition(e.PropertyName))
{
return;
}
IsAnimating = false; //won't end the animation right away if batched
break;
}
}
public Task Animate(Action action)
{
if (_handler == null)
{
action();
return(Task.FromResult(0));
}
var tcs = new TaskCompletionSource <bool>();
_handler.Completed += Handler;
_handler.Attach(this);
action();
return(tcs.Task);
void Handler(object _, EventArgs __)
{
_handler.Completed -= Handler;
tcs.TrySetResult(true);
}
}