QUndoStack provides support for undo and redo actions, command compression, command macros, and supports the concept of a clean state. Undo and Redo Actions. QUndoStack provides convenient undo and redo QAction objects, which can be inserted into a menu o

The QUndoStack class is a stack of QUndoCommand objects. For an overview of Qt's Undo Framework, see the overview document. An undo stack maintains a stack of commands that have been applied to a document. New commands are pushed on the stack using pu

The QUndoStack class is a stack of QUndoCommand objects. For an overview of Qt's Undo Framework, see the overview document. An undo stack maintains a stack of commands that have been applied to a document. New commands are pushed on the stack using pu