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osu-lazer/osu.Game/Screens/Edit/Compose/Components/Timeline/TimelineControlPointDisplay.cs

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// 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 System.Collections.Specialized;
using System.Linq;
using osu.Framework.Bindables;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Screens.Edit.Components.Timelines.Summary.Parts;
namespace osu.Game.Screens.Edit.Compose.Components.Timeline
{
/// <summary>
/// The part of the timeline that displays the control points.
/// </summary>
public class TimelineControlPointDisplay : TimelinePart<TimelineControlPointGroup>
{
private readonly IBindableList<ControlPointGroup> controlPointGroups = new BindableList<ControlPointGroup>();
protected override void LoadBeatmap(EditorBeatmap beatmap)
{
base.LoadBeatmap(beatmap);
controlPointGroups.UnbindAll();
controlPointGroups.BindTo(beatmap.ControlPointInfo.Groups);
controlPointGroups.BindCollectionChanged((sender, args) =>
{
switch (args.Action)
{
case NotifyCollectionChangedAction.Reset:
Clear();
break;
case NotifyCollectionChangedAction.Add:
foreach (var group in args.NewItems.OfType<ControlPointGroup>())
Add(new TimelineControlPointGroup(group));
break;
case NotifyCollectionChangedAction.Remove:
foreach (var group in args.OldItems.OfType<ControlPointGroup>())
{
var matching = Children.SingleOrDefault(gv => gv.Group == group);
matching?.Expire();
}
break;
}
}, true);
}
}
}