osu-lazer/osu.Game/Rulesets/Edit/HitObjectComposer.cs

// Copyright (c) 2007-2017 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.Framework.Graphics.Containers;

namespace osu.Game.Rulesets.Edit
{
    public abstract class HitObjectComposer : CompositeDrawable
    {
        private readonly Ruleset ruleset;

        public HitObjectComposer(Ruleset ruleset)
        {
            this.ruleset = ruleset;

            RelativeSizeAxes = Axes.Both;
        }

        [BackgroundDependencyLoader]
        private void load(OsuGameBase osuGame)
        {
            try
            {
                InternalChild = ruleset.CreateRulesetContainerWith(osuGame.Beatmap.Value, true);
            }
            catch { }
        }
    }
}