trait UndoManager[T <: Exec[T]] extends Disposable[T] with Observable[T, Update[T]]
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- abstract def addEdit(edit: UndoableEdit[T])(implicit tx: T): Unit
Add another edit to the history.
Add another edit to the history. Unless merging is blocked, it tries to merge this edit with the most recent edit. Afterwards, the internal merge-block flag is cleared.
- abstract def blockMerge()(implicit tx: T): Unit
Disallow the merging of the next edit to be added.
Disallow the merging of the next edit to be added. This can be used to avoid merging edits if the editor component was temporarily unfocused, for example.
- abstract def canRedo(implicit tx: T): Boolean
Whether there are edits that can be redone, and thus whether
redoandredoNamemay be called. - abstract def canUndo(implicit tx: T): Boolean
Whether there are undoable edits and thus
undoandundoNamemay be called. - abstract def capture[A](name: String)(block: => A)(implicit tx: T): A
Creates a compound capture if during the execution of
blockmore than one edit is added.Creates a compound capture if during the execution of
blockmore than one edit is added. If exactly one edit is added, it will be directly added without a wrapping compound.Note: this wraps the call in
UndoManager.using, so this manager is found by agnostic code. - abstract def clear()(implicit tx: T): Unit
Clears the history, removing all edits.
Clears the history, removing all edits. Afterwards,
canUndoandcanRedowill returnfalse. - abstract def dispose()(implicit tx: T): Unit
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- Disposable
- abstract def react(fun: (T) => (Update[T]) => Unit)(implicit tx: T): Disposable[T]
Registers a live observer with this observable.
Registers a live observer with this observable. The method is called with the observing function which receives the observable's update message of type
A, and the method generates an opaqueDisposableinstance, which may be used to remove the observer eventually (through thedisposemethod).- Definition Classes
- Observable
- abstract def redo()(implicit tx: T): Unit
Throws an exception if
!canRedo - abstract def redoName(implicit tx: T): String
Throws an exception if
!canRedo - abstract def undo()(implicit tx: T): Unit
Throws an exception if
!canUndo - abstract def undoName(implicit tx: T): String
Throws an exception if
!canUndo - abstract def use[A](block: => A)(implicit tx: T): A
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- final def !=(arg0: Any): Boolean
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- def ack(): Unit
A no-op that can be used to acknowledge the presence of the undo manager.
A no-op that can be used to acknowledge the presence of the undo manager.
This is useful to avoid warnings about an unused undo manager argument, when the code proceeds to call undo manager agnostic implementations.
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- final def notifyAll(): Unit
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- def reactNow(fun: (T) => (Update[T]) => Unit)(implicit tx: T): Disposable[T]
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