traitsui.undo module

Defines the manager for Undo and Redo history for Traits user interface support.

class traitsui.undo.AbstractUndoItem

Bases: traits.has_traits.HasPrivateTraits

Abstract base class for undo items.

merge_undo(undo_item)

Merges two undo items if possible.

redo()

Re-does the change.

undo()

Undoes the change.

class traitsui.undo.ListUndoItem

Bases: traitsui.undo.AbstractUndoItem

A change to a list, which can be undone.

merge_undo(undo_item)

Merges two undo items if possible.

redo()

Re-does the change.

undo()

Undoes the change.

class traitsui.undo.UndoHistory

Bases: traits.has_traits.HasStrictTraits

Manages a list of undoable changes.

add(undo_item, extend=False)

Adds an UndoItem to the history.

clear()

Clears the undo history.

extend(undo_item)

Extends the undo history.

If possible the method merges the new UndoItem with the last item in the history; otherwise, it appends the new item.

redo()

Redoes an operation.

revert()

Reverts all changes made so far and clears the history.

undo()

Undoes an operation.

class traitsui.undo.UndoHistoryUndoItem

Bases: traitsui.undo.AbstractUndoItem

An undo item for the undo history.

redo()

Re-does the change.

undo()

Undoes the change.

class traitsui.undo.UndoItem

Bases: traitsui.undo.AbstractUndoItem

A change to an object trait, which can be undone.

merge_undo(undo_item)

Merges two undo items if possible.

redo()

Re-does the change.

undo()

Undoes the change.