Class ApplyDefaultUndoAttribute

Use this attribute on action classes (TimelineAction, ClipAction, MarkerAction and TrackAction) to have the default undo behaviour applied.

By default, applying this attribute will record all objects passed to the Execute method with the Undo system, using the name of Action it is applied to.

Simple track Action example (with context menu and shortcut support).

   [ApplyDefaultUndo]
   public class SetNameToTypeAction : TrackAction
   {
       public override ActionValidity Validate(IEnumerable<TrackAsset> items)
       {
           return ActionValidity.Valid;
       }

       public override bool Execute(IEnumerable<TrackAsset> items)
       {
           foreach (TrackAsset track in items)
               track.name = track.GetType().Name;
           return true;
       }
   }

Inheritance

Object

ApplyDefaultUndoAttribute

Namespace: UnityEditor.Timeline.Actions

Syntax

public class ApplyDefaultUndoAttribute : Attribute

Constructors

ApplyDefaultUndoAttribute(String)

Use this attribute on action classes to have the default undo behaviour applied.

Declaration

public ApplyDefaultUndoAttribute(string undoTitle = null)

Parameters

Type	Name	Description
String	undoTitle	The title of the action to appear in the undo history.

Fields

UndoTitle

The title of the action to appear in the undo history. If not specified, the name is taken from the DisplayName attribute, or derived from the name of the class this attribute is applied to.

Declaration

public string UndoTitle

Field Value

Type	Description
String

See Also

TimelineAction

TrackAction

ClipAction

MarkerAction