osu/osu.Game/Storyboards/Drawables/DrawablesExtensions.cs

31 lines
1.3 KiB
C#

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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, BlendingMode newValue, double delay = 0)
where T : Drawable
=> drawable.TransformTo(drawable.PopulateTransform(new TransformBlendingMode(), newValue, delay));
}
public class TransformBlendingMode : Transform<BlendingMode, Drawable>
{
private BlendingMode 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.Mode;
}
}