osukey/osu.Game/Overlays/Toolbar/ToolbarMusicButton.cs

// 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.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Input.Events;
using osu.Game.Input.Bindings;

namespace osu.Game.Overlays.Toolbar
{
    public class ToolbarMusicButton : ToolbarOverlayToggleButton
    {
        protected override Anchor TooltipAnchor => Anchor.TopRight;

        public ToolbarMusicButton()
        {
            Hotkey = GlobalAction.ToggleNowPlaying;
        }

        [BackgroundDependencyLoader(true)]
        private void load(NowPlayingOverlay music)
        {
            StateContainer = music;
        }

        [Resolved(canBeNull: true)]
        private VolumeOverlay volume { get; set; }

        protected override bool OnScroll(ScrollEvent e)
        {
            volume?.Adjust(GlobalAction.IncreaseVolume, e.ScrollDelta.Y, e.IsPrecise);
            return true;
        }
    }
}