void UpdateElevation()
{
if (Parent is AView view)
{
ElevationHelper.SetElevation(view, View);
}
}
void SetUpNewElement(IndicatorView newElement)
{
if (newElement == null)
{
IndicatorView = null;
return;
}
IndicatorView = newElement;
IndicatorView.PropertyChanged += OnElementPropertyChanged;
if (Tracker == null)
{
_visualElementTracker = new VisualElementTracker(this);
}
this.EnsureId();
UpdateBackgroundColor();
if (IndicatorView.IndicatorTemplate != null)
{
UpdateIndicatorTemplate();
}
else
{
UpdateItemsSource();
}
ElevationHelper.SetElevation(this, newElement);
UpdateSelectedIndicator();
}
protected virtual void OnElementChanged(ElementChangedEventArgs <TElement> e)
{
var args = new VisualElementChangedEventArgs(e.OldElement, e.NewElement);
// The list of event handlers can be changed inside the handlers. (ex.: are used CompressedLayout)
// To avoid an exception, a copy of the handlers is called.
var handlers = _elementChangedHandlers.ToArray();
foreach (var handler in handlers)
{
handler(this, args);
}
ElementChanged?.Invoke(this, e);
ElevationHelper.SetElevation(this, e.NewElement);
}
//todo: make virtual when unsealed
void OnElementChanged(ElementChangedEventArgs <MediaElement> e)
{
if (e.OldElement != null)
{
}
if (e.NewElement != null)
{
this.EnsureId();
UpdateKeepScreenOn();
UpdateLayoutParameters();
UpdateShowPlaybackControls();
UpdateSource();
UpdateBackgroundColor();
ElevationHelper.SetElevation(this, e.NewElement);
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}