// This can be called from the three main entry-points (Primary, Secondary, and StartWith)
private static void InitializeElement(FrameworkElement element)
{
if (GetIsInitialized(element))
{
return;
}
// Set IsInitialized to true to only run this code once per element
SetIsInitialized(element, true);
#if __UWP__
// The new way of handling translate animations (see Translation property section):
// https://blogs.windows.com/buildingapps/2017/06/22/sweet-ui-made-possible-easy-windows-ui-windows-10-creators-update/
ElementCompositionPreview.SetIsTranslationEnabled(element, true);
#endif
element
.Events()
.LoadedUntilUnloaded
.Take(1)
.Subscribe(
args =>
{
// Perform validations on element's attached properties
Validate(element);
var startSettings = element.GetSettings(SettingsTarget.StartWith, getStartWithFunc: GetStartWith);
// If any StartWith settings were specified, apply them
if (startSettings != null)
{
element.ApplyInitialSettings((AnimationSettings)startSettings);
}
},
ex => Logger.ErrorException($"Error on subscription to the {nameof(FrameworkElement.Loaded)} event of {nameof(FrameworkElement)}", ex)
);
element
.Observe(UIElement.VisibilityProperty)
.TakeUntil(element.Events().UnloadedMaterialized)
.Subscribe(
_ =>
{
var isVisible = element.Visibility == Visibility.Visible;
var elementGuid = GetElementGuid(element);
if (isVisible && _actives.GetNextIdleActiveTimeline(elementGuid)?.Timeline is Timeline idle)
{
RunNextAnimation(idle, element);
}
},
ex => Logger.ErrorException($"Error on subscription to the {nameof(FrameworkElement.Visibility)} changes of {nameof(FrameworkElement)}", ex)
);
#if __UWP__
element
.Events()
.SizeChanged
.TakeUntil(element.Events().UnloadedMaterialized)
.Subscribe(
args =>
{
// If the element child is a SpriteVisual, maintain its size so update any effects applied
if (args.Sender is FrameworkElement elem &&
ElementCompositionPreview.GetElementChildVisual(elem) is SpriteVisual sprite)
{
sprite.Size = new Vector2((float)elem.ActualWidth, (float)elem.ActualHeight);
}
},
ex => Logger.ErrorException($"Error on subscription to the {nameof(FrameworkElement.SizeChanged)} event of {nameof(FrameworkElement)}", ex)
);
#endif
}
