Struct zng_wgt_undo::UndoMix

pub struct UndoMix<P>(/* private fields */);

m Undo scope widget mixin.

Widget is an undo/redo scope, it tracks changes and handles undo/redo commands.

You can force the widget to use a parent undo scope by setting undo_scope to false, this will cause the widget to start registering undo/redo actions in the parent, note that the widget will continue behaving as if it owns the scope, so it may clear it.

Implementations

impl<P: WidgetImpl> UndoMix<P>

pub fn undo_enabled(&self, enabled: impl IntoVar<bool>)

P If the widget can register undo actions.

Is true by default in this widget, if set to false disables undo in the widget.

pub fn undo_limit(&self, limit: impl IntoVar<u32>)

P Sets the maximum number of undo/redo actions that are retained in the widget.

pub fn undo_interval(&self, interval: impl IntoVar<Duration>)

P Sets the time interval that undo and redo cover each call for undo handlers in the widget and descendants.

When undo is requested inside the context all actions after the latest that are within interval of the previous are undone.

Trait Implementations

impl<P> Deref for UndoMix<P>

type Target = P

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<P> DerefMut for UndoMix<P>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.