mirror of https://github.com/ppy/osu
73 lines
2.6 KiB
C#
73 lines
2.6 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Diagnostics;
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using JetBrains.Annotations;
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using osu.Framework.Audio;
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using osu.Framework.Audio.Track;
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using osu.Framework.Bindables;
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namespace osu.Game.Beatmaps
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{
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/// <summary>
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/// A <see cref="Bindable{T}"/> for the <see cref="OsuGame"/> beatmap.
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/// This should be used sparingly in-favour of <see cref="IBindable{WorkingBeatmap}"/>.
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/// </summary>
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public abstract class BindableBeatmap : NonNullableBindable<WorkingBeatmap>
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{
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private AudioManager audioManager;
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private WorkingBeatmap lastBeatmap;
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protected BindableBeatmap(WorkingBeatmap defaultValue)
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: base(defaultValue)
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{
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}
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/// <summary>
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/// Registers an <see cref="AudioManager"/> for <see cref="Track"/>s to be added to.
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/// </summary>
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/// <param name="audioManager">The <see cref="AudioManager"/> to register.</param>
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protected void RegisterAudioManager([NotNull] AudioManager audioManager)
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{
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if (this.audioManager != null) throw new InvalidOperationException($"Cannot register multiple {nameof(AudioManager)}s.");
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this.audioManager = audioManager;
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ValueChanged += b => registerAudioTrack(b.NewValue);
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// If the track has changed prior to this being called, let's register it
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if (Value != Default)
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registerAudioTrack(Value);
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}
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private void registerAudioTrack(WorkingBeatmap beatmap)
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{
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var trackLoaded = lastBeatmap?.TrackLoaded ?? false;
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// compare to last beatmap as sometimes the two may share a track representation (optimisation, see WorkingBeatmap.TransferTo)
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if (!trackLoaded || lastBeatmap?.Track != beatmap.Track)
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{
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if (trackLoaded)
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{
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Debug.Assert(lastBeatmap != null);
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Debug.Assert(lastBeatmap.Track != null);
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lastBeatmap.RecycleTrack();
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}
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audioManager.Track.AddItem(beatmap.Track);
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}
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lastBeatmap = beatmap;
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}
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/// <summary>
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/// Retrieve a new <see cref="BindableBeatmap"/> instance weakly bound to this <see cref="BindableBeatmap"/>.
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/// If you are further binding to events of the retrieved <see cref="BindableBeatmap"/>, ensure a local reference is held.
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/// </summary>
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[NotNull]
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public new abstract BindableBeatmap GetBoundCopy();
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}
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}
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