Struct UndoRedoManager 

pub struct UndoRedoManager<T> { /* private fields */ }

Combined undo/redo manager.

Implementations

impl<T: Clone> UndoRedoManager<T>

pub fn new() -> Self

Create a new undo/redo manager.

pub fn push(&mut self, state: T)

Push a new state (clears redo stack).

pub fn undo(&mut self, current: T) -> Option<T>

Undo: move current state to redo stack and return previous state.

pub fn redo(&mut self, current: T) -> Option<T>

Redo: move current state to undo stack and return next state.

pub fn can_undo(&self) -> bool

Check if undo is available.

pub fn can_redo(&self) -> bool

Check if redo is available.

pub fn clear(&mut self)

Clear all undo/redo history.

pub fn undo_count(&self) -> usize

Get the number of undo states.

pub fn redo_count(&self) -> usize

Get the number of redo states.

Trait Implementations

impl<T: Clone> Clone for UndoRedoManager<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for UndoRedoManager<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Clone> Default for UndoRedoManager<T>

fn default() -> Self

Returns the “default value” for a type.