use cursive::event::Key; use cursive::menu::MenuTree; use cursive::traits::*; use cursive::views::Dialog; use cursive::Cursive; use std::sync::atomic::{AtomicUsize, Ordering}; // This examples shows how to configure and use a menubar at the top of the // application. fn main() { let mut siv = Cursive::default(); // We'll use a counter to name new files. let counter = AtomicUsize::new(1); // The menubar is a list of (label, menu tree) pairs. siv.menubar() // We add a new "File" tree .add_subtree( "File", MenuTree::new() // Trees are made of leaves, with are directly actionable... .leaf("New", move |s| { // Here we use the counter to add an entry // in the list of "Recent" items. let i = counter.fetch_add(1, Ordering::Relaxed); let filename = format!("New {}", i); s.menubar() .find_subtree("File") .unwrap() .find_subtree("Recent") .unwrap() .insert_leaf(0, filename, |_| ()); s.add_layer(Dialog::info("New file!")); }) // ... and of sub-trees, which open up when selected. .subtree( "Recent", // The `.with()` method can help when running loops // within builder patterns. MenuTree::new().with(|tree| { for i in 1..100 { // We don't actually do anything here, // but you could! tree.add_leaf(format!("Item {}", i), |_| ()) } }), ) // Delimiter are simple lines between items, // and cannot be selected. .delimiter() .with(|tree| { for i in 1..10 { tree.add_leaf(format!("Option {}", i), |_| ()); } }), ) .add_subtree( "Help", MenuTree::new() .subtree( "Help", MenuTree::new() .leaf("General", |s| { s.add_layer(Dialog::info("Help message!")) }) .leaf("Online", |s| { let text = "Google it yourself!\n\ Kids, these days..."; s.add_layer(Dialog::info(text)) }), ) .leaf("About", |s| { s.add_layer(Dialog::info("Cursive v0.0.0")) }), ) .add_delimiter() .add_leaf("Quit", |s| s.quit()); // When `autohide` is on (default), the menu only appears when active. // Turning it off will leave the menu always visible. // Try uncommenting this line! // siv.set_autohide_menu(false); siv.add_global_callback(Key::Esc, |s| s.select_menubar()); siv.add_layer(Dialog::text("Hit to show the menu!")); siv.run(); }