playtest-unity/playtest/Library/PackageCache/com.unity.timeline@1.7.4/Runtime/Extensions/TrackExtensions.cs

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2023-06-19 23:21:21 -04:00
using System;
using UnityEngine;
using UnityEngine.Timeline;
using UnityEngine.Playables;
namespace UnityEngine.Timeline
{
/// <summary>
/// Extension methods for TrackAssets
/// </summary>
public static class TrackAssetExtensions
{
/// <summary>
/// Gets the GroupTrack this track belongs to.
/// </summary>
/// <param name="asset">The track asset to find the group of</param>
/// <returns>The parent GroupTrack or null if the Track is an override track, or root track.</returns>
public static GroupTrack GetGroup(this TrackAsset asset)
{
if (asset == null)
return null;
return asset.parent as GroupTrack;
}
/// <summary>
/// Assigns the track to the specified group track.
/// </summary>
/// <param name="asset">The track to assign.</param>
/// <param name="group">The GroupTrack to assign the track to.</param>
/// <remarks>
/// Does not support assigning to a group in a different timeline.
/// </remarks>
public static void SetGroup(this TrackAsset asset, GroupTrack group)
{
const string undoString = "Reparent";
if (asset == null || asset == group || asset.parent == group)
return;
if (group != null && asset.timelineAsset != group.timelineAsset)
throw new InvalidOperationException("Cannot assign to a group in a different timeline");
TimelineUndo.PushUndo(asset, undoString);
var timeline = asset.timelineAsset;
var parentTrack = asset.parent as TrackAsset;
var parentTimeline = asset.parent as TimelineAsset;
if (parentTrack != null || parentTimeline != null)
{
TimelineUndo.PushUndo(asset.parent, undoString);
if (parentTimeline != null)
{
parentTimeline.RemoveTrack(asset);
}
else
{
parentTrack.RemoveSubTrack(asset);
}
}
if (group == null)
{
TimelineUndo.PushUndo(timeline, undoString);
asset.parent = asset.timelineAsset;
timeline.AddTrackInternal(asset);
}
else
{
TimelineUndo.PushUndo(group, undoString);
group.AddChild(asset);
}
}
}
}