osu-lazer/osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/SliderCircleMask.cs

// 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.Allocation;
using osu.Framework.Graphics;
using osu.Game.Graphics;
using osu.Game.Rulesets.Edit;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Osu.Objects.Drawables;
using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
using OpenTK;

namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
{
    public class SliderCircleMask : HitObjectMask
    {
        public SliderCircleMask(DrawableHitCircle sliderHead, DrawableSlider slider)
            : this(sliderHead, Vector2.Zero, slider)
        {
        }

        public SliderCircleMask(DrawableSliderTail sliderTail, DrawableSlider slider)
            : this(sliderTail, ((Slider)slider.HitObject).Curve.PositionAt(1), slider)
        {
        }

        private readonly DrawableOsuHitObject hitObject;

        private SliderCircleMask(DrawableOsuHitObject hitObject, Vector2 position, DrawableSlider slider)
            : base(hitObject)
        {
            this.hitObject = hitObject;

            Origin = Anchor.Centre;

            Position = position;
            Size = slider.HeadCircle.Size;
            Scale = slider.HeadCircle.Scale;

            AddInternal(new RingPiece());
        }

        [BackgroundDependencyLoader]
        private void load(OsuColour colours)
        {
            Colour = colours.Yellow;
        }

        protected override void Update()
        {
            base.Update();

            RelativeAnchorPosition = hitObject.RelativeAnchorPosition;
        }
    }
}