Trait PresentsHistoryEntries 

pub trait PresentsHistoryEntries {
    // Required method
    fn history_entry_presenter(&self) -> Option<Rc<dyn HistoryEntryPresenter>>;

    // Provided method
    fn open_history_entry(&mut self, entry: &HistoryEntry) -> bool { ... }
}

A live widget that presents its document’s changes in the shared History view: the app says how each of its changes shows (crate::widget::HistoryEntryPresenter) and takes up the ones a person chooses to open. History stays the one service; this is only the app’s word on what its changes look like.

Required Methods

fn history_entry_presenter(&self) -> Option<Rc<dyn HistoryEntryPresenter>>

How this app’s changes show in History.

Provided Methods

fn open_history_entry(&mut self, entry: &HistoryEntry) -> bool

A person chose entry in History and its face opens it (crate::widget::EntryFace::opens): History has closed, the app is live again, and takes the change up (a calculation goes back into the calculator). Returns whether it did.

Implementors