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