Struct UndoStack 

pub struct UndoStack { /* private fields */ }

Undo/redo stack.

Implementations

impl UndoStack

pub fn new() -> Self

pub fn push(&mut self, action: UndoAction)

Push a new action. Clears the redo stack (new timeline branch).

pub fn push_undo_only(&mut self, action: UndoAction)

Push to undo stack WITHOUT clearing redo (used during redo operations).

pub fn pop_undo(&mut self) -> Option<UndoAction>

Pop the last undo action (for undoing). Returns it so caller can reverse it.

pub fn push_redo(&mut self, action: UndoAction)

Push an action to redo stack (after undoing).

pub fn pop_redo(&mut self) -> Option<UndoAction>

Pop from redo stack (for redoing).

pub fn can_undo(&self) -> bool

pub fn can_redo(&self) -> bool

Trait Implementations

impl Debug for UndoStack

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

Formats the value using the given formatter.

impl Default for UndoStack

fn default() -> Self

Returns the “default value” for a type.