Method add_handler

src/lib.rs:125–132

add a handler, return a HandlerID which you may use with keyboard.output.state().enable_handler / disable_handler / toggle_handler / is_handler_enabled by default, most handlers start in the enabled state (with the notable exception of Layers).

(&mut self, handler: Box<dyn ProcessKeys<T> + Send + 'a>)

    ///
    /// by default, most handlers start in the enabled state (with the notable exception of Layers).
    pub fn add_handler(&mut self, handler: Box<dyn ProcessKeys<T> + Send + 'a>) -> HandlerID {
        self.output
            .state()
            .modifiers_and_enabled_handlers
            .push(handler.default_enabled());
        self.handlers.push(handler);
        return self.output.state().modifiers_and_enabled_handlers.len() - 1;
    }

    /// predict the next or further out hander_ids returned by add_handler
    /// Needed to add space cadets before the layers they toggle.