TimedViewAnimation.cs

using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Maui.Controls;
 
namespace NeuroAccessMaui.Animations
{
    public abstract class TimedViewAnimation : IViewAnimation
    {
        protected TimedViewAnimation(TimeSpan Duration, Easing Easing)
        {
            if (Duration < TimeSpan.Zero)
                throw new ArgumentOutOfRangeException(nameof(Duration), "Duration cannot be negative.");
            this.BaseDuration = Duration;
            this.Easing = Easing ?? throw new ArgumentNullException(nameof(Easing));
        }
 
        protected TimeSpan BaseDuration { get; }
 
        protected Easing Easing { get; }
 
        public abstract Task RunAsync(VisualElement Target, IAnimationContext Context, AnimationOptions? Options, CancellationToken Token);
 
        protected TimeSpan ResolveDuration(IAnimationContext Context, AnimationOptions? Options)
        {
            if (Options?.DurationOverride is TimeSpan Override)
                return Override;
 
            double Scale = Context.DurationScale <= 0 ? 1 : Context.DurationScale;
            double Milliseconds = this.BaseDuration.TotalMilliseconds * Scale;
            if (Milliseconds < 0)
                Milliseconds = 0;
            return TimeSpan.FromMilliseconds(Milliseconds);
        }
 
        protected uint ResolveDurationMilliseconds(IAnimationContext Context, AnimationOptions? Options)
        {
            TimeSpan Duration = this.ResolveDuration(Context, Options);
            double Milliseconds = Math.Round(Duration.TotalMilliseconds);
            if (Milliseconds < 0)
                Milliseconds = 0;
            return (uint)Milliseconds;
        }
    }
}