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osu-lazer/osu.Game/Storyboards/Drawables/DrawablesExtensions.cs
2019-08-21 13:29:50 +09:00

31 lines
1.3 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using osu.Framework.Graphics;
using osu.Framework.Graphics.Transforms;
namespace osu.Game.Storyboards.Drawables
{
public static class DrawablesExtensions
{
/// <summary>
/// Adjusts <see cref="Drawable.Blending"/> after a delay.
/// </summary>
/// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
public static TransformSequence<T> TransformBlendingMode<T>(this T drawable, BlendingParameters newValue, double delay = 0)
where T : Drawable
=> drawable.TransformTo(drawable.PopulateTransform(new TransformBlendingParameters(), newValue, delay));
}
public class TransformBlendingParameters : Transform<BlendingParameters, Drawable>
{
private BlendingParameters valueAt(double time)
=> time < EndTime ? StartValue : EndValue;
public override string TargetMember => nameof(Drawable.Blending);
protected override void Apply(Drawable d, double time) => d.Blending = valueAt(time);
protected override void ReadIntoStartValue(Drawable d) => StartValue = d.Blending;
}
}