public async Task HandleTouch(TouchStatus status, TouchInteractionStatus?interactionStatus = null)
{
if (IsCanceled || effect == null)
{
return;
}
if (effect?.IsDisabled ?? true)
{
return;
}
var canExecuteAction = effect.CanExecute;
if (interactionStatus == TouchInteractionStatus.Started)
{
effect?.HandleUserInteraction(TouchInteractionStatus.Started);
interactionStatus = null;
}
effect?.HandleTouch(status);
if (interactionStatus.HasValue)
{
effect?.HandleUserInteraction(interactionStatus.Value);
}
if (effect == null || (!effect.NativeAnimation && !IsButton) || (!canExecuteAction && status == TouchStatus.Started))
{
return;
}
var control = effect.Element;
if (control?.GetRenderer() is not UIView renderer)
{
return;
}
var color = effect.NativeAnimationColor;
var radius = effect.NativeAnimationRadius;
var shadowRadius = effect.NativeAnimationShadowRadius;
var isStarted = status == TouchStatus.Started;
defaultRadius = (float?)(defaultRadius ?? renderer.Layer.CornerRadius);
defaultShadowRadius = (float?)(defaultShadowRadius ?? renderer.Layer.ShadowRadius);
defaultShadowOpacity ??= renderer.Layer.ShadowOpacity;
var tcs = new TaskCompletionSource <UIViewAnimatingPosition>();
UIViewPropertyAnimator.CreateRunningPropertyAnimator(.2, 0, UIViewAnimationOptions.AllowUserInteraction,
() =>
{
if (color == Color.Default)
{
renderer.Layer.Opacity = isStarted ? 0.5f : (float)control.Opacity;
}
else
{
renderer.Layer.BackgroundColor = (isStarted ? color : control.BackgroundColor).ToCGColor();
}
renderer.Layer.CornerRadius = isStarted ? radius : defaultRadius.GetValueOrDefault();
if (shadowRadius >= 0)
{
renderer.Layer.ShadowRadius = isStarted ? shadowRadius : defaultShadowRadius.GetValueOrDefault();
renderer.Layer.ShadowOpacity = isStarted ? 0.7f : defaultShadowOpacity.GetValueOrDefault();
}
}, endPos => tcs.SetResult(endPos));
await tcs.Task;
}