private void UpdateBackgroundIfNotRemoved()
{
if (BackgroundEffect.GetBackground(Element) == null)
{
if (_backgroundManager != null)
{
_backgroundManager.Dispose();
_backgroundManager = null;
}
View.Background = null;
}
else
{
var shouldCreateTracker = _backgroundManager == null;
if (shouldCreateTracker)
{
SetTracker();
}
var oldBackground = _background;
_background = BackgroundEffect.GetBackground(Element);
_background?.SetBinding(BindableObject.BindingContextProperty,
new Binding("BindingContext", source: Element));
if (!shouldCreateTracker)
{
UpdateBackground(oldBackground, _background);
}
}
}
private void SetTracker()
{
if (Control is IVisualElementRenderer controlRenderer)
{
_backgroundManager = new MaterialBackgroundManager(controlRenderer);
}
else if (Container is IVisualElementRenderer containerRenderer)
{
_backgroundManager = new MaterialBackgroundManager(containerRenderer);
}
}
protected override void OnDetached()
{
RemoveViewObservers();
if (_backgroundManager != null)
{
_backgroundManager.Dispose();
_backgroundManager = null;
}
base.OnDetached();
}
private void UpdateBackgroundIfNotRemoved()
{
if (BackgroundEffect.GetBackground(Element) == null)
{
if (_backgroundManager != null)
{
_backgroundManager.Dispose();
_backgroundManager = null;
}
if (View is UITextField textField)
{
textField.BorderStyle = UITextBorderStyle.None;
}
View.Layer?.Sublayers
?.FirstOrDefault(x => x is GradientStrokeLayer)
?.RemoveFromSuperLayer();
}
else
{
var shouldCreateTracker = _backgroundManager == null;
if (shouldCreateTracker)
{
SetTracker();
}
var oldBackground = _background;
_background = BackgroundEffect.GetBackground(Element);
_background?.SetBinding(BindableObject.BindingContextProperty,
new Binding("BindingContext", source: Element));
if (!shouldCreateTracker)
{
_backgroundManager?.SetBackgroundElement(oldBackground, _background);
}
}
}
